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ec1cc2c8bf5eadbd27ba7fcb56ee4b52ee038181
subsection
3
39
Introduction
Formal aspects of the model-building have been relegated to the appendices. In Section 3 we analyse possible scenarios for reheating after inflation, including constraints from possible overproduction of gravitinos and Big Bang Nucleosynthesis (BBN). In addition, we estimate the effect that the texture Goldstone bosons...
{ "cite_spans": [] }
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.01467503234744072, 0.018254123628139496, -0.0019612498581409454, 0.014545300044119358, 0.0036248781252652407, -0.07997626066207886, 0.011355407536029816, 0.015689998865127563, 0.007005553692579269, 0.0373934805393219, -0.00004352238465799019, 0.06605672836303711, 0.00613558292388916, 0....
bf8e1fe5b560cfbd5bf1a6da97fd49fa6656ae90
subsection
4
39
Superpotential and scalar potential
The model of SUSY hybrid inflation with global defects is implemented by the superpotentialW = \kappa \, \widehat{S}\, \Big ( \widehat{X}_1 \widehat{X}_2\: -\: {M}^2\Big ) \,,with \widehat{X}_1=({\bf 2}) being a fundamental, \widehat{X}_2=({\bf \overline{2}}) an identical anti-fundamental representation of the global {...
{ "cite_spans": [] }
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
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f4f5422007ee89a51ece886039a5ffb5babb4393
subsection
5
39
Superpotential and scalar potential
In the following, we assume that {\rm SU}(2) is an exact symmetry, while {\rm SU}(2)_X may be explicitly broken through the introduction of new operators in addition to those arising from the superpotential.We note that the action of a \theta _3 rotation of {\bf X} is equivalent to an U(1) transformation given by\wideh...
{ "cite_spans": [] }
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
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b188e8a69c15531fb06c4d69428cee29b2578aab
subsection
6
39
Identification of the scalar particle spectrum
In order to identify these modes and determine the vacuum manifold, we first make use of the symmetries {\rm SU}(2) and {\rm U}(1)_X to write the fields asX_1= {\rm e}^{{\rm i}\left(\alpha _i \tau ^i +\beta \mathbb {1}_2\right)} \left(\begin{array}{c} {w}_1^+\\ 0 \end{array} \right) \; \textnormal {and}\;\; X_2= {\rm e...
{ "cite_spans": [] }
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
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e8112b88a157458a8a4e51bba687b7b4dc398ec8
subsection
7
39
Identification of the scalar particle spectrum
In this way, the waterfall doublets X_{1,2} may be expressed asX_{1}= \left( \begin{array}{c} {w}_1^+ +\frac{1}{\sqrt{2}}(X_{1R}^+ +{\rm i}X_{1I}^+)\\ \frac{1}{\sqrt{2}}(X_{1R}^- +{\rm i}X_{1I}^-) \end{array} \right)\; \textnormal {and}\;\; X_{2}= \left( \begin{array}{c} {w}_2^+ +\frac{1}{\sqrt{2}}(X_{2R}^+ +{\rm i}X_{...
{ "cite_spans": [] }
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.023908549919724464, 0.021070649847388268, -0.042110782116651535, -0.02757035754621029, 0.005042613949626684, -0.03497026115655899, 0.023694945499300957, 0.048335857689380646, 0.004336953163146973, 0.002033066004514694, -0.012160251848399639, -0.008170407265424728, -0.00572157371789217, ...
44aaeedb6a7a305a68aa24a1837dc50218c40fb8
subsection
8
39
Identification of the scalar particle spectrum
The modes of this type areH_0^R\!\!\!&=&\!\!\!\frac{1}{w} \left({w}_2^+ X_{1R}^- - {w}_1^+ X_{2R}^- - {w}_2^- X_{1R}^+ \right)\,,\\ H_0^I\!\!\!&=&\!\!\!\frac{1}{{w}}\left({w}_2^+ X_{1I}^- + {w}_1^+ X_{2I}^- -{w}_2^- X_{1I}^+ \right)\,,andH_g= \frac{1}{w}\left( -{w}_1^+ X_{1R}^+ + {w}_2^+ X_{2R}^+ -{w}_2^- X_{2R}^- \rig...
{ "cite_spans": [] }
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.02422822266817093, 0.022199032828211784, -0.019834186881780624, -0.020047785714268684, -0.015585093759000301, -0.0063621969893574715, 0.057152971625328064, 0.017301512882113457, 0.01977315917611122, 0.00633549690246582, -0.02532673068344593, -0.026684610173106194, -0.0023438669741153717, ...
42c3cd762ee9dc97d98c41a681b60d4c9c9ec5df
subsection
9
39
Lifting of the moduli
Unlike the Goldstone bosons (REF ), the moduli fields, H_0^R, H_0^I and H_g, are not protected by the global symmetry {\rm SU}(2)\times {\rm U}(1)_X and usually acquire non-zero masses if soft SUSY-breaking terms are added to the potential which respect the global symmetry. We refer to this mechanism as lifting. Some o...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1063, "openalex_id": "", "raw": "A. E. Nelson and N. Seiberg, “R symmetry breaking versus supersymmetry breaking,” Nucl. Phys. B 416 (1994) 46 [arXiv:hep-ph/9309299].", "source_ref_id": "afe438ee565725ee79800343d0a35c5bd1bd5...
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.007963539101183414, 0.004725491162389517, -0.043296024203300476, 0.01879517361521721, 0.008222888223826885, -0.057117801159620285, 0.02440931648015976, 0.049276307225227356, 0.01551517192274332, 0.012273309752345085, -0.0610843151807785, 0.029565785080194473, 0.001786838285624981, -0.00...
7819f02d300279251294f58f89bf1bde3191a209
subsection
10
39
Lifting of the moduli
Although they break the accidental global {\rm U}(1)_X-symmetry, we show in Appendix , how these d-terms can be absorbed in m_1^2 and m_2^2 after a field redefinition of X_1 and X_2.Consequently, we will set both b=0 and d=0 in the subsequent discussion and just allow m_{1,2}^2 to vary, that isV_{\rm lift} = m_1^2 |X_1...
{ "cite_spans": [] }
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.020648926496505737, 0.019061721861362457, -0.03449118509888649, -0.020435264334082603, 0.007047037594020367, -0.05060742050409317, 0.01982480101287365, -0.001159880543127656, 0.02548684924840927, 0.008019963279366493, -0.007653685286641121, -0.003929858561605215, 0.03226299211382866, -0...
724dc6695556b0c6054b6aa1f0e1bf12aec03dfe
subsection
11
39
Vacuum manifold and texture defects
We now determine the vacuum manifold of the scalar potential, which arises as a combination of (REF ) and (REF ),V_{\rm global}=V_0+V_{\rm lift}\,.With the parameterisation (REF ), we get the potentialV_{\rm global}({w}_1^+,{w}_2^+,{w}_2^-,\varphi _2^+)= \kappa ^2\left({w}_1^+{w}_2^+e^{i\varphi _2^+} - {M}^2 \right)^2 ...
{ "cite_spans": [] }
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.025322293862700462, 0.013423866592347622, -0.0033102035522460938, -0.035420700907707214, -0.001981164328753948, 0.02439177595078945, 0.01690186746418476, 0.03880717605352402, 0.03648851066827774, 0.01395014300942421, -0.0061780293472111225, 0.044268250465393066, 0.00022667075973004103, ...
f204c7b907d2eb9f9f120e75263d606feefc5547
subsection
12
39
Cosmological and Astrophysical Implications
In this section, we outline possible scenarios for reheating after inflation. In order to do so, we choose to consider couplings to the Higgs-fields of the MSSM and the right-handed neutrino sector, such that the inflationary energy can eventually be converted into particles of the Standard Model (SM). Furthermore, we ...
{ "cite_spans": [] }
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.030464068055152893, -0.04111733287572861, -0.02823573350906372, 0.021703358739614487, -0.007429050747305155, -0.09896243363618851, 0.00671552587300539, 0.022573323920369148, 0.03099825792014599, 0.011996371671557426, -0.0000231323156185681, 0.00892859697341919, 0.0066926321014761925, 0....
96a9b692edf3b42bb80df207afdbfe0eff294255
subsection
13
39
Extended superpotential
We extend the superpotential (REF ) by adding the termsW_{\rm RH} = \lambda \, \widehat{S} \widehat{H}_u \widehat{H}_d\ +\ \frac{\rho _{ij}}{2} \widehat{S}\, \widehat{N}_i \widehat{N}_j\,,where \widehat{H}_{u,d} denote the MSSM-Higgs doublets and \widehat{N}_i (i=1,2,3) are right-handed singlet neutrinos, which we assu...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 390, "openalex_id": "", "raw": "A. Pilaftsis, “Resonant \\tau leptogenesis with observable lepton number violation,” Phys. Rev. Lett. 95 (2005) 081602 [arXiv:hep-ph/0408103].", "source_ref_id": "c022710c4ee59cbabcb0aa60d43a7...
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.03698030859231949, 0.02251771278679371, -0.015324554406106472, -0.010915598832070827, -0.00005643492113449611, -0.047811999917030334, 0.04592026770114899, -0.00045624683843925595, 0.04378443956375122, 0.013135332614183426, -0.025782475247979164, 0.026911413297057152, -0.023509345948696136...
aaff7489db5caccc131663e44a4d284613509b01
subsection
14
39
Stellar cooling
It is straightforward to check that the coupling \lambda does not induce any tree-level mixing between the Higgs bosons, the Goldstone bosons and moduli. Hence, we do not expect related collider phenomenology.We may now examine whether the same coupling induces effects that are in contradiction with astrophysical obser...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1010, "openalex_id": "", "raw": "G. G. Raffelt, “Astrophysical methods to constrain axions and other novel particle phenomena,” Phys. Rept. 198 (1990) 1.", "source_ref_id": "483e20572a259691589383ad0add093312f58cb4", "...
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.008987000212073326, -0.029387032613158226, -0.06957677751779556, 0.002427939558401704, -0.02145284041762352, -0.06084916368126869, -0.0002101560094160959, 0.018035033717751503, -0.0014237682335078716, -0.0035875525791198015, -0.036039549857378006, -0.0037267825100570917, 0.012175936251878...
9014e85272fda05e80de688da5574cbd463189e5
subsection
15
39
Reheating and gravitinos
We sketch two possible ways in which the inflationary vacuum energy can be transferred to the MSSM degrees of freedom through renormalisable interactions. One may alternatively consider “gravity-mediated" reheating through non-renormalisable operators, a possibility which we do not discuss here.For the first reheat sce...
{ "cite_spans": [] }
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.012118971906602383, -0.01881951093673706, -0.006643302738666534, 0.018621090799570084, 0.002300925785675645, -0.041637979447841644, 0.034647438675165176, 0.026344263926148415, 0.018758459016680717, 0.017796877771615982, -0.0012468117056414485, 0.003117506392300129, 0.002798887202516198, ...
520476e590db7155e5571c41f96670b31dbbc217
subsection
16
39
Reheating delayed by stop VEV
Considering the scalar potential (REF ) and the interactions arising from (REF ), it is clear that the oscillating fields S and H_\kappa ^R can directly decay into Goldstone bosons, light moduli and their superpartner fermions. Since these particles are only weakly coupled to the MSSM degrees of freedom, higher tempera...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1540, "openalex_id": "", "raw": "M. Kawasaki and T. Moroi, “Gravitino production in the inflationary universe and the effects on big bang nucleosynthesis,” Prog. Theor. Phys. 93 (1995) 879 [arXiv:hep-ph/9403364].", "source_r...
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.03639668971300125, -0.02109665609896183, -0.03856279328465462, 0.023903440684080124, 0.03346787020564079, -0.07572219520807266, -0.022362759336829185, 0.027411922812461853, 0.008237306028604507, 0.015055964700877666, -0.025947513058781624, 0.026054292917251587, 0.0017809360288083553, 0....
f7164ca19932c323e614d4a034a26b3661c6816f
subsection
17
39
Reheating delayed by stop VEV
This typically is below the upper bounds Y_{\widetilde{G}} \stackrel{<}{{}_\sim }10^{-15} for a gravitino of mass m_{\widetilde{G}}\simeq 360~{\rm GeV} and Y_{\widetilde{G}} \stackrel{<}{{}_\sim }10^{-14} for a gravitino of mass m_{\widetilde{G}}\simeq 600~{\rm GeV}, as imposed by constraints from BBN , . Larger gravit...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 306, "openalex_id": "", "raw": "M. Kawasaki, K. Kohri and T. Moroi, “Hadronic decay of late-decaying particles and big-bang nucleosynthesis,” Phys. Lett. B 625 (2005) 7 [arXiv:astro-ph/0402490].", "source_ref_id": "db64dc0fa...
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ 0.024549640715122223, -0.023969849571585655, -0.023664694279432297, 0.019285734742879868, 0.01309873629361391, -0.09447568655014038, -0.0007113903411664069, 0.025037888437509537, -0.0022943769581615925, 0.012579974718391895, -0.03539786860346794, 0.03097313456237316, -0.0033013850916177034, ...
828fe9bfc99d1322600c92cc44b906f83c321402
subsection
18
39
Reheating delayed by stop VEV
In the weak basis \left(H_u^*,H_d\right), the Higgs mass-square matrix may then be written down as\left( \begin{array}{cc} \lambda ^2|S|^2+h^2 v_{\rm stop}^2 & -\kappa \lambda {M}^2\\ -\kappa \lambda {M}^2 & \lambda ^2 |S|^2 \end{array} \right)\,,and the condition for it to be positive definite is|S|^2 > \frac{-h^2 v_{...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 877, "openalex_id": "", "raw": "M. Berkooz, D. J. H. Chung and T. Volansky, “Constraining modular inflation in the MSSM from giant Q-ball formation,” Phys. Rev. D 73 (2006) 063526 [arXiv:hep-ph/0507218].", "source_ref_id": "...
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ 0.002923138439655304, -0.012012897990643978, -0.022485094144940376, 0.03139370679855347, 0.047563448548316956, -0.07132992148399353, 0.01070101372897625, 0.006025517359375954, 0.014034115709364414, 0.028815701603889465, -0.0022271531634032726, 0.005358133930712938, -0.005304743070155382, -...
13d01fd32e1462e71f6a187f0e1f594d22e8e62f
subsection
19
39
Reheating via sneutrinos
If \lambda =0 and \rho \ge \kappa , decays into right handed neutrinos and sneutrinos also take place. The decay rate is\Gamma _{\kappa \rho }=\frac{3}{32\pi } \left(\kappa ^2+\rho ^2\right)\kappa {w}\,,and the reheat temperature within this sector is given byT_{\kappa \rho }= \left(\frac{45}{4 \pi ^3 g_*^{\rm G}}\righ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 2298, "openalex_id": "", "raw": "A. Pilaftsis, “CP violation and baryogenesis due to heavy Majorana neutrinos,” Phys. Rev. D 56 (1997) 5431 [arXiv:hep-ph/9707235].", "source_ref_id": "7a7cebb6fe1efbc0a038587c51e730639603bb4d...
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ 0.03548591211438179, -0.012067650444805622, -0.036431796848773956, -0.0012824739096686244, -0.0019060709746554494, -0.048362139612436295, 0.033136457204818726, 0.027995118871331215, 0.0030130986124277115, 0.031397249549627304, -0.010000436566770077, 0.03478412702679634, -0.000604050001129508...
aafe79a4595277bc5f786fd2e135c8fd693ef902
subsection
20
39
Big bang nucleosynthesis and the new light fields
The number and the temperature of light relativistic species is constrained by considerations from BBN, or even more strongly by a combined analysis of CMB data and observations of abundances of light nuclei, see for example Ref. . This is because the results of BBN are sensitive to the effective number of degrees of f...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 231, "openalex_id": "", "raw": "V. Barger, J. P. Kneller, H. S. Lee, D. Marfatia and G. Steigman, “Effective number of neutrinos and baryon asymmetry from BBN and WMAP,” Phys. Lett. B 566 (2003) 8 [arXiv:hep-ph/0305075].", "...
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ 0.002263973467051983, -0.022613031789660454, -0.006507731508463621, -0.006164416205137968, -0.010253682732582092, -0.08007638156414032, 0.03954991698265076, 0.012939170934259892, 0.04031284153461456, 0.03469773009419441, -0.020598916336894035, -0.006999816745519638, 0.009567052125930786, 0...
353f9eeb484fb7c02e4fe6578df318b26832fad0
subsection
21
39
Semi-Local Model
It is possible to promote the global symmetry to a semi-local one by assigning opposite {\rm U}(1)_X gauge charges to X_1 and X_2. In this case, the scalar-gauge Lagrangian is{\cal L}=-\frac{1}{4} F_{\mu \nu }F^{\mu \nu } -|D_\mu X_1|^2-|D_\mu X_2|^2-V_0- V_{\rm lift} -\frac{1}{2} D^2\,.For the kinetic terms, we use th...
{ "cite_spans": [] }
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
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5e6fa843bdad7ce46c5b854c456748486e1264d8
subsection
22
39
Semi-Local Model
Choosing again the parameterisation (REF ) and using V_{\rm lift}, we minimiseV_{{w}}({w}_1^+,{w}_2^+,{w}_2^-,\varphi _2^+)&=& \kappa ^2\left({w}_1^+{w}_2^+e^{i\varphi _2^+} - {M}^2 \right)^2 +m_1^2{{w}_1^+}^2+m_2^2{{w}_2^+}^2+m_2^2{{w}_2^-}^2\cr &+&\frac{g^2}{8}\left({{w}_1^+}^2-{{w}_2^+}^2-{{w}_2^-}^2-m_{\rm FI}^2\ri...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1278, "openalex_id": "", "raw": "B. Garbrecht and A. Pilaftsis, “F(D)-term hybrid inflation with electroweak-scale lepton number violation,” Phys. Lett. B 636 (2006) 154 [arXiv:hep-ph/0601080].", "source_ref_id": "73ab300b26...
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.057824429124593735, -0.007495052646845579, 0.0011156757827848196, -0.00955857615917921, 0.024685995653271675, 0.00016365629562642425, 0.006694054696708918, 0.026074392721056938, 0.005404829513281584, 0.029232613742351532, -0.05156901478767395, 0.006224898621439934, 0.018079670146107674, ...
e509b3c2a7267aa261f3b204f0923f8a23b173f1
subsection
23
39
Semi-Local Model
During the phase transition at the end of inflation, {w} is evolving rapidly, such that the g-sector particles are produced via preheating, which occurs due to their non-adiabatically changing mass term. Even though approximate D-parity holds due to the smallness of (), from (REF ) and (REF ), we see that the g-sector ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 617, "openalex_id": "", "raw": "B. Garbrecht and A. Pilaftsis, “F(D)-term hybrid inflation with electroweak-scale lepton number violation,” Phys. Lett. B 636 (2006) 154 [arXiv:hep-ph/0601080].", "source_ref_id": "73ab300b268...
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.01125364564359188, 0.01472510863095522, -0.015137107111513615, 0.0027905225288122892, 0.017334429547190666, -0.05182017758488655, -0.007873737253248692, 0.01234467700123787, 0.012237862683832645, 0.034638337790966034, 0.0018778328085318208, 0.029053479433059692, 0.03512663394212723, 0.0...
068b0cf28fd52787a5538544cf457525e66cc09b
subsection
24
39
Inflation and Impact on the CMB
We now discuss the predictions of our model for the amplitude A_{\rm s} of the primordial power spectrum produced during inflation and the scalar spectral index n_{\rm s} that can be observed in the CMB. As we discuss below, for given superpotential couplings, the symmetry breaking scale M can be determined by imposing...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 512, "openalex_id": "", "raw": "M. Cruz, N. Turok, P. Vielva, E. Martinez-Gonzalez and M. Hobson, “A Cosmic Microwave Background feature consistent with a cosmic texture,” Science 318, 1612 (2007) [arXiv:0710.5737 [astro-ph]].", ...
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.015698494389653206, -0.02134324051439762, -0.04470027983188629, -0.011998897418379784, 0.025462377816438675, -0.10386331379413605, -0.017407173290848732, -0.01685795560479164, 0.02894076146185398, 0.021816177293658257, -0.008535770699381828, 0.028544103726744652, 0.004321281332522631, 0...
09665173c420dbf65d70a26a4926998f1ca28755
subsection
25
39
Inflation and Impact on the CMB
\frac{1}{32\pi ^2}\, \Bigg \lbrace 2\kappa ^4\, \Bigg [ |S^2 + {M}^2|^2\, \ln \Bigg (\frac{\kappa ^2 (|S|^2 +{M}^2)}{Q^2}\Bigg ) +\, |S^2 - {M}^2|^2\, \ln \Bigg (\frac{\kappa ^2 (|S|^2 - {M}^2)}{Q^2}\Bigg )\Bigg ]\\ &&\hspace{-4.83691pt} +\, 2\lambda ^4\, \Bigg [ |S^2 + {\textstyle \frac{\kappa }{\lambda }}\, {M}^2|^2...
{ "cite_spans": [] }
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.05613979697227478, 0.024469628930091858, -0.0011822918895632029, 0.005499564111232758, 0.014401078224182129, -0.0072539327666163445, -0.02805464155972004, 0.023462772369384766, -0.0014873994514346123, -0.009008301421999931, -0.007955680601298809, 0.03322621434926987, -0.000702224147971719...
c5fd47b0e1a6a834007b8ed32a1ab795212c0f1c
subsection
26
39
Inflation and Impact on the CMB
When \langle S \rangle < {M}, the combination of waterfall fields,\frac{1}{\sqrt{2}} \left(X_1+X_2\right)\,,develops a negative mass term which induces spontaneous breakdown of {\rm SU}(2). In order for this instability to occur first in this direction, rather than in any other direction, which involves the N_i and H_{...
{ "cite_spans": [] }
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.02016627974808216, 0.006528871133923531, -0.025490054860711098, 0.0022042568307369947, 0.03212570771574974, -0.06589888781309128, -0.0007450807606801391, 0.012188243679702282, 0.033925723284482956, 0.033590126782655716, -0.006433531176298857, 0.019357798621058464, 0.00799329113215208, -...
43f6a18832a846e795d5fa8c51be96dc1d16a2d4
subsection
27
39
Inflation and Impact on the CMB
The second observable we consider is the scalar spectral index which is given byn_{\rm s}= 1-2\frac{m_{\rm Pl}^2}{8\pi } \frac{\partial ^2V/\partial \sigma ^2}{V} \Bigg |_{\sigma =\sigma _{\rm e}}\,.We can now compare the predictions of our F-term hybrid inflation model with the best-fit value for M found in Ref. . The...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 316, "openalex_id": "", "raw": "M. Cruz, N. Turok, P. Vielva, E. Martinez-Gonzalez and M. Hobson, “A Cosmic Microwave Background feature consistent with a cosmic texture,” Science 318, 1612 (2007) [arXiv:0710.5737 [astro-ph]].", ...
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
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104e4dbe2bff5dbd1048de6ea0b8711f33f3878c
subsection
28
39
Conclusions
The current CMB data shows hints for the presence of topological defects of order the GUT energy scale M_{\rm GUT} \sim 10^{16} GeV. First, fits to the CMB spectrum marginally favour models with a 10% contribution to it that results from defects. Second, it has been suggested that textures associated with GUT energies ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 394, "openalex_id": "", "raw": "M. Cruz, N. Turok, P. Vielva, E. Martinez-Gonzalez and M. Hobson, “A Cosmic Microwave Background feature consistent with a cosmic texture,” Science 318, 1612 (2007) [arXiv:0710.5737 [astro-ph]].", ...
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
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d5b5406f063842af7fb761ba7e118ab679a4eed3
subsection
29
39
Symmetries and Breaking Patterns
In this appendix, we present more details on the {\rm SU}(2)\times {\rm SU}(2)_X symmetry of the superpotential.
{ "cite_spans": [] }
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.025027647614479065, 0.039800066500902176, -0.025744903832674026, 0.015642279759049416, -0.03287167847156525, -0.04782722517848015, 0.06269120424985886, 0.022463839501142502, 0.034977663308382034, 0.028415536507964134, 0.0031647002324461937, 0.018312912434339523, 0.01191102433949709, 0.0...
30848713bc0fa77cb5c888b0f5a4ce78e54bd3af
subsection
30
39
Symmetries and Breaking Patterns
In particular, we discuss formal aspects of the spontaneous and the explicit breakdown of the symmetry, such as counting of Goldstone modes and homotopy groups of the vacuum manifold.The combined action of the symmetry transformations (REF ) and (REF ) can be compactly written in terms of a tensor-product as\mathbf {X}...
{ "cite_spans": [] }
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
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ec768295c6e64c991fd2e684c28ea24d636f073d
subsection
31
39
Symmetries and Breaking Patterns
Using the parameterisation of the VEVs (), it is useful to distinguish two cases. An overview of arguments is presented in Table REF .When w_1^+=w_2^+ (|X_1|=|X_2| is the reparameterization invariant form), all 3 generators of {\rm SU}(2) and {\rm SU}(2)_X have the same effect on the VEVs, which means G_{\tau ^i}=G_{\s...
{ "cite_spans": [] }
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.010854195803403854, 0.009054061956703663, -0.012028858996927738, -0.01313487347215414, 0.0061822389252483845, -0.02540019154548645, 0.06986959278583527, 0.055926185101270676, 0.020259130746126175, 0.023371227085590363, -0.002341699320822954, 0.0044202436693012714, 0.030876869335770607, ...
fa9ec277dc65d8ac37c5639245729349398f1625
subsection
32
39
Symmetries and Breaking Patterns
When taking the flat direction H_g into account, the configuration can change to |X_1|=|X_2|, such that the monopoles can unwind. Hence, the monopoles are topologically unstable. In other words, even though \pi _2\left({\rm SU}(2)\times {\rm SU}(2)_X/{\rm U}(1)_D\right)= \mathbb {Z}, for the full vacuum manifold {\cal ...
{ "cite_spans": [] }
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.03790190443396568, 0.01089450903236866, -0.03292766213417053, -0.0010633209021762013, 0.01586875319480896, -0.013518956489861012, 0.018340615555644035, 0.08715607225894928, 0.022582456469535828, 0.03192060813307762, -0.03597934544086456, 0.003909969236701727, 0.020461536943912506, -0.01...
079840d650177c63815f4371188d12c2537a3393
subsection
33
39
Symmetries and Breaking Patterns
These terms explicitly break {\rm SU}(2)_X. The symmetry breaking pattern is{\rm SU}(2)\times {\rm SU}(2)_X \xrightarrow{} {\rm SU}(2)\times {\rm U}(1)_X \xrightarrow{} {\rm U}(1)_D\,.Appendix:ExtraSymmetry.8 Again, there are 3 Goldstone bosons G_{\tau ^i} (i=1,2,3), out of which G_{\tau ^3} is absorbed as a transverse...
{ "cite_spans": [] }
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.020824899896979332, 0.0120525062084198, -0.05409897118806839, -0.0512307807803154, 0.014081599190831184, -0.055685631930828094, 0.046959005296230316, 0.04640977829694748, 0.006541154813021421, 0.02804114855825901, -0.004649369046092033, 0.008253678679466248, 0.012777182273566723, -0.019...
f0365fb38399e5c6f2d23d98ce37b70ba5091301
subsection
34
39
Field Redefinitions and the Lifting Potential
When we include the d-term in the lifting potential (REF ), it turns out that the minima (REF ) get shifted toAppendix:FieldRedef.0{Appendix:FieldRedef}.1a\endcsname {w}_1^+\!\!\!&=&\!\!\!\sqrt{\frac{m_2}{m_1}{M}^2 \frac{1}{\sqrt{1-\frac{|d|^2}{m_1^2 m_2^2}}}- \frac{m_2^2}{\kappa ^2}} \,,\\ {w}_2^+\!\!\!&=&\!\!\!\sqr...
{ "cite_spans": [] }
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.03854159265756607, 0.007056803908199072, -0.044003941118717194, -0.028562890365719795, -0.011718109250068665, -0.00320798484608531, 0.041806794703006744, 0.0618557445704937, 0.04372929781675339, 0.003568453947082162, -0.06298483163118362, 0.007842588238418102, 0.001487650559283793, 0.00...
83a3a51a24a57d4c34f5024bbd9b980eafeb222a
subsection
35
39
Field Redefinitions and the Lifting Potential
To see this, we make use of the fact that field redefinitions according to {\rm SU}(2)_X have the explicit effectAppendix:FieldRedef.0{Appendix:FieldRedef}.3a\endcsname \hspace{-22.76228pt} |X_1|^2\!\!\!&\xrightarrow{}&\!\!\! |X_1|^2 \cos ^2\theta _1 + |X_2|^2 \sin ^2\theta _1 +{\rm i}\sin \theta _1\cos \theta _1 \lef...
{ "cite_spans": [] }
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.0023819950874894857, 0.010008574463427067, -0.03402305021882057, -0.018399911001324654, -0.014303413219749928, -0.03338225930929184, 0.031017428264021873, 0.05837318301200867, 0.025997882708907127, 0.022885460406541824, -0.03136833757162094, -0.011709727346897125, 0.028164373710751534, ...
284e960d4c6bb80bb19105c40e0871ac9224b8e1
subsection
36
39
Scalar Interaction Terms and
In this appendix, we present the expressions (REF ) and (REF ), from which the interactions within the scalar sector can easily be inferred. It turns out that in the situation where {w}_1^+ \approx {w}_2^+, the symmetry of the model is enhanced, which has the consequence that certain interactions are suppressed. These ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 427, "openalex_id": "", "raw": "B. Garbrecht, C. Pallis and A. Pilaftsis, “Anatomy of F(D)-term hybrid inflation,” JHEP 0612 (2006) 038 [arXiv:hep-ph/0605264].", "source_ref_id": "d9d62cbab8a845ce43f96c988d6c7fea2d600e5b", ...
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.01771450601518154, 0.0248704943805933, 0.004440070129930973, -0.017317797988653183, -0.021849416196346283, 0.031980711966753006, 0.04556030407547951, 0.017409346997737885, 0.038633186370134354, 0.031370390206575394, -0.05163297802209854, 0.006469380110502243, -0.019545461982488632, 0.02...
f2cb7d390d9b04ae3f842c7b9bdc06350e27aa1e
subsection
37
39
Scalar Interaction Terms and
On the other hand, allowing for m_1\ne m_2 or, respectively, m_{\rm FI}\ne 0, the smallness of {{w}_1^+}^2-{{w}_2^+}^2 allows to control the rate of D-parity violating interactions, a feature which we make use of when constructing the semi-local model. [Table: D-parities of the scalar masseigenstates.]In particular, we...
{ "cite_spans": [] }
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.023761004209518433, 0.034611403942108154, -0.013803357258439064, 0.01854182407259941, -0.030658867210149765, 0.00562359020113945, 0.010133144445717335, 0.037785641849040985, 0.017687221989035606, 0.048681825399398804, -0.06220285966992378, -0.009675322100520134, 0.0011941544944420457, -...
1cdb15ef8cdca0df818e96c58f87e77cc7c42b59
subsection
38
39
Scalar Interaction Terms and
Accordingly, the D-term (REF ) is{Appendix:DParities}.0\endcsname D\!\!\!&=&\!\!\!-\frac{g}{2}m_{\rm FI}^2 + \frac{g}{2} \frac{{{w}_1^+}^4-{{w}_2^+}^4}{{{w}_1^+}^2+{{w}_2^+}^2} \\ && +\frac{g}{\sqrt{2}}{w} H_g +g\frac{{w}_1^+ {w}_2^+}{{{w}_1^+}^2+{{w}_2^+}^2} \left( H_g H_\kappa ^R + H_0^I G_{\tau ^1} - H_0^R G_{\tau...
{ "cite_spans": [] }
10.1088/1475-7516/2008/09/020
0807.1729
Textures and Semi-Local Strings in SUSY Hybrid Inflation
[ "Richard A. Battye", "Bjorn Garbrecht", "Apostolos Pilaftsis" ]
[ "hep-ph", "astro-ph", "hep-th" ]
2,008
en
Physics
[ -0.05656231567263603, 0.019077952951192856, -0.008501135744154453, -0.007821960374712944, -0.024175582453608513, -0.008913219906389713, 0.034187693148851395, 0.022573033347725868, 0.006066788919270039, 0.02440451830625534, -0.0475575216114521, 0.008936112746596336, 0.0012047727359458804, 0...
2679af05a17f539d21b3121498671c41f8f78036
abstract
0
4
Abstract
We take advantage of the connection between the free carrier optical conductivity and the glue function in the normal state, to reconstruct from the infrared optical conductivity the glue-spectrum of ten different high-Tc cuprates revealing a robust peak in the 50-60 meV range and a broad continuum at higher energies f...
{ "cite_spans": [] }
0807.1730
Observation of a robust peak in the glue function of the high-Tc cuprates in the 50-60 meV range
[ "E. van Heumen", "E. Muhlethaler", "A. B. Kuzmenko", "D. van der Marel", "H. Eisaki", "M. Greven", "W. Meevasana", "Z. X. Shen" ]
[ "cond-mat.supr-con", "cond-mat.str-el" ]
2,008
en
Physics
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8222a039e8ab2de3ff6c2d8589ff987e58d34bf8
subsection
1
4
Appendix
The inversion of Eq's 1 and 2 allows to extract \tilde{\Pi }(\omega ) from experimental data of the optical conductivity, or related optical spectra. The accuracy of the resulting \tilde{\Pi }(\omega ) spectrum is in practice limited by the convolution with thermal factors expressed by Eq's 1 and 2 . Microscopic models...
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0807.1730
Observation of a robust peak in the glue function of the high-Tc cuprates in the 50-60 meV range
[ "E. van Heumen", "E. Muhlethaler", "A. B. Kuzmenko", "D. van der Marel", "H. Eisaki", "M. Greven", "W. Meevasana", "Z. X. Shen" ]
[ "cond-mat.supr-con", "cond-mat.str-el" ]
2,008
en
Physics
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103cbd080b172b8cd76551d5f4d45a9d469320fb
subsection
2
4
Appendix
As the fitted curves are within the limits of the experimental noise, further reduction of \chi ^2, while in principle possible by fitting the statistical noise of the data, can not improve the accuracy of the \tilde{\Pi }(\omega ) functions. [Figure: Experimental reflectivity (red and blue lines) and fit curves (black...
{ "cite_spans": [] }
0807.1730
Observation of a robust peak in the glue function of the high-Tc cuprates in the 50-60 meV range
[ "E. van Heumen", "E. Muhlethaler", "A. B. Kuzmenko", "D. van der Marel", "H. Eisaki", "M. Greven", "W. Meevasana", "Z. X. Shen" ]
[ "cond-mat.supr-con", "cond-mat.str-el" ]
2,008
en
Physics
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e1cbfcf04a112020389099bc9e162311c39bae80
subsection
3
4
Appendix
A comparison of Fig. REF (a-d) shows that the MMP model describes better the optical data then the MFL model but that they give similar results if we add an extra oscillator to these models. Panels SREF e-f show the model independent results mentioned above and are very similar to the modified MMP and MFL model. The mo...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1032, "openalex_id": "", "raw": "E. van Heumen, A.B. Kuzmenko, D. van der Marel, submitted to the proceedings of LT25, to be published in J. Phys.: Conf. Ser..", "source_ref_id": "a58a190e29e5e1f6ad26b6155bce115342340b67", ...
0807.1730
Observation of a robust peak in the glue function of the high-Tc cuprates in the 50-60 meV range
[ "E. van Heumen", "E. Muhlethaler", "A. B. Kuzmenko", "D. van der Marel", "H. Eisaki", "M. Greven", "W. Meevasana", "Z. X. Shen" ]
[ "cond-mat.supr-con", "cond-mat.str-el" ]
2,008
en
Physics
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39019cd58aceedec932342ba62a3745521549378
abstract
0
20
Abstract
Accretion discs at sub-pc distances around supermassive black holes are likely to cool rapidly enough that self-gravity results in fragmentation. Here, we use high-resolution hydrodynamic simulations of a simplified disc model to study how the outcome of fragmentation depends upon numerical resolution and cooling time,...
{ "cite_spans": [] }
10.1111/j.1365-2966.2008.13706.x
0807.1731
Binary formation and mass function variations in fragmenting discs with short cooling times
[ "R. D. Alexander", "P. J. Armitage", "J. Cuadra" ]
[ "astro-ph" ]
2,008
en
Physics
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dce715a55567ebef5464620823ff44c979cfad91
subsection
1
20
Introduction
In recent years the topic of gravitational instabilities in accretion discs has been the subject of a great deal of theoretical and numerical research. Such gravitational instabilities have applications both to accretion disc theory, in terms of the transport of angular momentum, and also to theories of star and planet...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 408, "openalex_id": "", "raw": "Durisen, R.H., Boss, A.P., Mayer, L., Nelson, A.F., Quinn, T., Rice, W.K.M., 2007, in Reipurth, B., Jewitt, D., Keil, K., eds, Protostars & Planets V, Univ. Arizona Press, Tuscon, 607", "sourc...
10.1111/j.1365-2966.2008.13706.x
0807.1731
Binary formation and mass function variations in fragmenting discs with short cooling times
[ "R. D. Alexander", "P. J. Armitage", "J. Cuadra" ]
[ "astro-ph" ]
2,008
en
Physics
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df2af9eea73724fe3060c9525194a26e5d0ca37e
subsection
2
20
Numerical Method
The simulations presented in this paper use the publicly-available smoothed-particle hydrodynamics (SPH) code gadget2 . We have modified the code to include a simple cooling prescription (discussed below), which is representative of the cooling expected in a real accretion disc. We adopt the standard prescription for t...
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10.1111/j.1365-2966.2008.13706.x
0807.1731
Binary formation and mass function variations in fragmenting discs with short cooling times
[ "R. D. Alexander", "P. J. Armitage", "J. Cuadra" ]
[ "astro-ph" ]
2,008
en
Physics
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9535481492733c372752e6035e3a83cf529d6727
subsection
3
20
Numerical Method
With this set-up we are able to resolve the disc scale-height properly with only moderate numbers of SPH particles (see Section REF below), and can thus run simulations with much larger particle numbers (“over-resolving” the disc thickness) to study the fragmentation process in detail when the cooling time is short.
{ "cite_spans": [] }
10.1111/j.1365-2966.2008.13706.x
0807.1731
Binary formation and mass function variations in fragmenting discs with short cooling times
[ "R. D. Alexander", "P. J. Armitage", "J. Cuadra" ]
[ "astro-ph" ]
2,008
en
Physics
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b4d1485997492057fd8fd9f395a3aeb6ecc95296
subsection
4
20
Initial Conditions
We adopt initial conditions similar to those that have been adopted in previous studies of disc fragmentation , , . We adopt a surface density profile\Sigma (r) \propto r^{-1}and a disk temperature that scales asT(r) \propto r^{-1/2} \, ,where r is the (cylindrical) radius. The disc sound speed c_s \propto T^{1/2} is n...
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10.1111/j.1365-2966.2008.13706.x
0807.1731
Binary formation and mass function variations in fragmenting discs with short cooling times
[ "R. D. Alexander", "P. J. Armitage", "J. Cuadra" ]
[ "astro-ph" ]
2,008
en
Physics
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cb1a919e31a1eb7f8a68e61919e4f6e8b3bffa25
subsection
5
20
Cooling
The principle aim of this study is to investigate the effect of variable cooling rates on the fragmentation properties. At each time-step, we allow the internal energy of the ith particle, u_i, to cool as\left(\frac{du}{dt}\right)_{\mathrm {cool},i} = -\frac{u_i}{t_{\mathrm {cool}}} \, .The cooling time-scale t_{\mathr...
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10.1111/j.1365-2966.2008.13706.x
0807.1731
Binary formation and mass function variations in fragmenting discs with short cooling times
[ "R. D. Alexander", "P. J. Armitage", "J. Cuadra" ]
[ "astro-ph" ]
2,008
en
Physics
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dcf3a3fb01bbd5b4b89bb5071d766e9647353975
subsection
6
20
Cooling
Thus, for 2-D collapse we havet_{\mathrm {D}} \propto h \propto \rho ^{-1} \, ,and we see that the cooling time-scale decreases with increasing density \rho . By contrast, in a collapsing spherical clump of mass m and radius h, we have \rho \simeq m/h^3, sot_{\mathrm {D}} \propto h^{-1} \propto \rho ^{1/3} \, ,and ther...
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10.1111/j.1365-2966.2008.13706.x
0807.1731
Binary formation and mass function variations in fragmenting discs with short cooling times
[ "R. D. Alexander", "P. J. Armitage", "J. Cuadra" ]
[ "astro-ph" ]
2,008
en
Physics
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55d17d44f6156bd2cb9fd18022d823434e3dcda7
subsection
7
20
Cooling
The results of the MR runs are shown in Figs.REF –REF . Fig.REF shows the evolution of the disc surface density in the four different simulations, and it is clear that the cooling rate has a dramatic effect on the fragmentation process. Slow cooling leads to the formation of larger, more massive fragments with larger s...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 2156, "openalex_id": "", "raw": "Nayakshin, S., Cuadra, J., Springel, V., 2007, MNRAS, 379, 21", "source_ref_id": "f04baaac961b4575ca9ca6214fc79a6da305449c", "start": 2032 }, { "arxiv_id": "", "doi"...
10.1111/j.1365-2966.2008.13706.x
0807.1731
Binary formation and mass function variations in fragmenting discs with short cooling times
[ "R. D. Alexander", "P. J. Armitage", "J. Cuadra" ]
[ "astro-ph" ]
2,008
en
Physics
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09dc460b6ef1e07767424bee8ac80f0be9af61ee
subsection
8
20
Cooling
The binary fraction is difficult to quantify due to the rapid merging of the binaries that form, but the differences are clearly seen in Fig.REF . With critical cooling (\tau =\infty ) most objects form as singles, and although some binaries form due to dynamical capture events the overall binary fraction is low. Howev...
{ "cite_spans": [] }
10.1111/j.1365-2966.2008.13706.x
0807.1731
Binary formation and mass function variations in fragmenting discs with short cooling times
[ "R. D. Alexander", "P. J. Armitage", "J. Cuadra" ]
[ "astro-ph" ]
2,008
en
Physics
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1b28a5c1daec0f941153846992ed94584ab053b6
subsection
9
20
Cooling
The dotted line denotes the approximate (mass) resolution limit of 10N_{\mathrm {ngb}}m; all of our clumps are above this limit by at least a factor of 5–10. We see clearly that faster cooling results in a smaller characteristic mass, and a somewhat broader mass function.]
{ "cite_spans": [] }
10.1111/j.1365-2966.2008.13706.x
0807.1731
Binary formation and mass function variations in fragmenting discs with short cooling times
[ "R. D. Alexander", "P. J. Armitage", "J. Cuadra" ]
[ "astro-ph" ]
2,008
en
Physics
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b2ff7ff45b6c99424d3f5c1b0edc76e242820e09
subsection
10
20
Simulations
The issue of numerical resolution is critical when considering calculations of fragmentation, as insufficient resolution can result in spurious suppression or amplification of fragmentation. We have conducted a number of calculations using a range of numbers of SPH particles for different values of \tau (see Table REF ...
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10.1111/j.1365-2966.2008.13706.x
0807.1731
Binary formation and mass function variations in fragmenting discs with short cooling times
[ "R. D. Alexander", "P. J. Armitage", "J. Cuadra" ]
[ "astro-ph" ]
2,008
en
Physics
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e87e5421e6ca51fa77d3d6cda45503f6ac566495
subsection
11
20
Simulations
Consequently our high-resolution simulations act not only as convergence tests, but also provide a means of studying the small-scale fragmentation that may occur in discs with short cooling times.In order to compare the fragmentation in different simulations we must first identify individual fragments (“clumps”) in our...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1760, "openalex_id": "", "raw": "Alexander, R.D., Armitage, P.J., Cuadra, J., Begelman, M.C., 2008, ApJ, 674, 927", "source_ref_id": "b78ed1bcac1a6e051efb5c8194a3d00c321a4055", "start": 1490 } ] }
10.1111/j.1365-2966.2008.13706.x
0807.1731
Binary formation and mass function variations in fragmenting discs with short cooling times
[ "R. D. Alexander", "P. J. Armitage", "J. Cuadra" ]
[ "astro-ph" ]
2,008
en
Physics
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921cba8a221cdda093fcbf0eed10682d024bd6b7
subsection
12
20
Numerical convergence
We first seek to compare our results at difference numerical resolutions, in order to test convergence in our simulations. The non-linear development of gravitational instabilities essentially amplifies seed fluctuations in the density field, and it is not possible to construct identical noise fields at different parti...
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10.1111/j.1365-2966.2008.13706.x
0807.1731
Binary formation and mass function variations in fragmenting discs with short cooling times
[ "R. D. Alexander", "P. J. Armitage", "J. Cuadra" ]
[ "astro-ph" ]
2,008
en
Physics
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1ade865513e4deee231b4cbc841bb5ffe4152581
subsection
13
20
Numerical convergence
Thus in this case, as expected, we see that the LR simulation is slightly under-resolved (by a factor of approximately 2 in particle number), but both resolution requirements are satisfied comfortably in the MR and HR runs. Binary mergers are somewhat more significant in the MR simulation than in the HR simulation (aga...
{ "cite_spans": [] }
10.1111/j.1365-2966.2008.13706.x
0807.1731
Binary formation and mass function variations in fragmenting discs with short cooling times
[ "R. D. Alexander", "P. J. Armitage", "J. Cuadra" ]
[ "astro-ph" ]
2,008
en
Physics
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5be7c9ed254f927d3b2983da51e7b2b370309498
subsection
14
20
Discussion
Our simulations are robust and well-understood from a numerical perspective, but concerns remain when we consider the physical interpretation of our results. The most obviously unphysical aspect of our simulations is our “thin disc approximation”, using an artificial cooling law to allow fragmentation characteristic of...
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10.1111/j.1365-2966.2008.13706.x
0807.1731
Binary formation and mass function variations in fragmenting discs with short cooling times
[ "R. D. Alexander", "P. J. Armitage", "J. Cuadra" ]
[ "astro-ph" ]
2,008
en
Physics
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d27ef60520263f5ed9b4bbe4ea82607d803d50b5
subsection
15
20
Discussion
Thus cooling is likely slower than predicted by our simulations in real fragmenting clumps. Models of core-collapse during star formation predict only moderate increases in temperature, however, so the uncertainly due to the temperature dependence of dust opacity is likely small. We note in passing that we also neglect...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1186, "openalex_id": "", "raw": "Bertin, G., Lodato, G., 2001, A&A, 370, 342", "source_ref_id": "05aa1f9036b376b642533d1e6b6a8703071c0009", "start": 800 }, { "arxiv_id": "", "doi": "", "end": ...
10.1111/j.1365-2966.2008.13706.x
0807.1731
Binary formation and mass function variations in fragmenting discs with short cooling times
[ "R. D. Alexander", "P. J. Armitage", "J. Cuadra" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.0010482151992619038, 0.024676453322172165, -0.05359536409378052, 0.0339701846241951, -0.013948224484920502, -0.03940296918153763, -0.035893023014068604, 0.015932107344269753, 0.001968622440472245, 0.046056609600782394, 0.021227549761533737, -0.013971115462481976, -0.029453033581376076, ...
e9ea4ac1b96c8c3095e6ebcc55950cd438b686e0
subsection
16
20
Discussion
Here, a better approach may be to “re-simulate” a small region of our computational domain at much higher resolution in order to study the inter-clump dynamics in more detail, but this is beyond the scope of this paper.
{ "cite_spans": [] }
10.1111/j.1365-2966.2008.13706.x
0807.1731
Binary formation and mass function variations in fragmenting discs with short cooling times
[ "R. D. Alexander", "P. J. Armitage", "J. Cuadra" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.06690089404582977, 0.0073745111003518105, -0.024095918983221054, 0.003004359779879451, -0.033969294279813766, 0.025087833404541016, 0.004463620018213987, -0.0019762010779231787, 0.00025441680918447673, 0.03125297278165817, -0.013039874844253063, 0.01426069438457489, -0.015718046575784683,...
cfc3847089e228500e7098ce65d25af6728a7552
subsection
17
20
Application to the Galactic Centre
We now consider the implications of our results for the formation of stars near the Galactic Centre (GC). Many young, massive stars are known to exist close to the black hole at the centre of the Galaxy , , , , and many of the stars at \simeq 0.1pc are known to form a coherent ring or disc Note that there is some contr...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 392, "openalex_id": "", "raw": "Ghez, A.M., Klein, B.L., Morris, M., Becklin, E.E. 1998, ApJ, 509, 678", "source_ref_id": "3186c91582d1f6856df9f4f15ad765d86f4d24dd", "start": 106 }, { "arxiv_id": "", ...
10.1111/j.1365-2966.2008.13706.x
0807.1731
Binary formation and mass function variations in fragmenting discs with short cooling times
[ "R. D. Alexander", "P. J. Armitage", "J. Cuadra" ]
[ "astro-ph" ]
2,008
en
Physics
[ 0.01357395388185978, 0.0019361387239769101, -0.0677553191781044, 0.012200535275042057, 0.02006717212498188, -0.0599420927464962, -0.06329933553934097, 0.017869701609015465, 0.03335881233215332, 0.015962176024913788, 0.00875172857195139, 0.012452328577637672, -0.03226007893681526, 0.0168472...
72345d12f1d10e08422df467272493fe1f267d5f
subsection
18
20
Application to the Galactic Centre
Systems of this type appear to be a plausible outcome of fast cooling in a fragmenting, self-gravitating accretion disc, and we suggest that such systems should be common if the stellar disc at the GC formed via fragmentation of a gaseous accretion disc.
{ "cite_spans": [] }
10.1111/j.1365-2966.2008.13706.x
0807.1731
Binary formation and mass function variations in fragmenting discs with short cooling times
[ "R. D. Alexander", "P. J. Armitage", "J. Cuadra" ]
[ "astro-ph" ]
2,008
en
Physics
[ 0.003558327443897724, 0.034050103276968, -0.05589586868882179, 0.026422392576932907, -0.011487333104014397, -0.06736794859170914, -0.033622950315475464, 0.033195801079273224, 0.012211966328322887, 0.014149405062198639, 0.006319558713585138, -0.023859482258558273, -0.04161679372191429, 0.03...
69cc36fe56c3256e7289d50740d24bbbef17e9af
subsection
19
20
Summary
We have used numerical hydrodynamic simulations to investigate the role of the cooling rate in the fragmentation of gravitationally unstable accretion discs. Our simulations make use of a simple cooling law, designed to mimic the behaviour of radiative cooling in an optically thick, geometrically thin disc. We performe...
{ "cite_spans": [] }
10.1111/j.1365-2966.2008.13706.x
0807.1731
Binary formation and mass function variations in fragmenting discs with short cooling times
[ "R. D. Alexander", "P. J. Armitage", "J. Cuadra" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.007454217411577702, -0.0076411450281739235, -0.053499460220336914, 0.012222779914736748, -0.01628178171813488, -0.03695826977491379, -0.00994913000613451, 0.009537125937640667, 0.01567140407860279, 0.037812795490026474, -0.014755841344594955, -0.0002701390767470002, -0.027360105887055397,...
9c43f29a9a2f2c83a97ea59aa85cd81d09e06729
abstract
0
21
Abstract
We prove the impossibility of resonant decay of a metastable vacuum in a theory of a scalar field coupled to a gauge field. Our result extends to gauge theories of scalar fields a recent no go theorem for resonant tunneling in a pure scalar field theory.
{ "cite_spans": [] }
10.1088/1126-6708/2008/09/077
0807.1732
Absence of resonant decay for metastable vacua in gauge theories of scalar fields
[ "M. Cardella", "S. Elitzur", "E. Rabinovici" ]
[ "hep-th" ]
2,008
en
Physics
[ -0.024870725348591805, 0.047879964113235474, -0.01762312278151512, -0.007163684815168381, -0.009322707541286945, -0.009452401660382748, 0.008971771225333214, 0.0274493470788002, -0.010779857635498047, 0.01577688939869404, 0.007804525550454855, -0.016661860048770905, -0.007621427997946739, ...
9807edc2c555b7e56ba12b0db4296f289a161e4f
subsection
1
21
Introduction
Understanding in detail the mobility patterns in the landscape is a challenging problem. In fact rather little is known about it and thus even a study of what may seem non generic paths is of interest. For example Tye , has suggested to apply the phenomena of rapid tunneling ,,,, to shed a different light on the issue ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 349, "openalex_id": "", "raw": "S. H. Tye, “A new view of the cosmic landscape,” arXiv:hep-th/0611148.", "source_ref_id": "548bbd2ec2d81aa1c43f8200cea4b97180df8371", "start": 202 }, { "arxiv_id": "", ...
10.1088/1126-6708/2008/09/077
0807.1732
Absence of resonant decay for metastable vacua in gauge theories of scalar fields
[ "M. Cardella", "S. Elitzur", "E. Rabinovici" ]
[ "hep-th" ]
2,008
en
Physics
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2a9d8e1e8845345f482ecf00a76273a60143cce7
subsection
2
21
Resonant tunneling: From QM to QFT
Quantum interference is typical in systems with a degenerate set of classical trajectories. In the double barrier potential V(x) in figure REF , in the semiclassical regime a point particle with wave function localized around the false vacuum x = x_+ will decay to the true vacuum localized around x = x_-. The tunneling...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 710, "openalex_id": "", "raw": "L.Chang, L. Esaki and R. Tsu, Appl. Phys. Lett. 24 (1974) 593.", "source_ref_id": "fee135ba48088a2cf5a0229584f07de1905b6d95", "start": 614 }, { "arxiv_id": "", "doi":...
10.1088/1126-6708/2008/09/077
0807.1732
Absence of resonant decay for metastable vacua in gauge theories of scalar fields
[ "M. Cardella", "S. Elitzur", "E. Rabinovici" ]
[ "hep-th" ]
2,008
en
Physics
[ -0.005966875236481428, 0.04663624241948128, -0.020021840929985046, 0.008874010294675827, 0.0006166215753182769, 0.023836979642510414, 0.009469171054661274, 0.020250750705599785, 0.008255957625806332, 0.062202002853155136, 0.0010691923089325428, -0.02833884209394455, 0.02119690366089344, -0...
53d0a342e0ddc77a1af91b2617afef9361f8ac2e
subsection
3
21
Resonant tunneling: From QM to QFT
In the semiclassical regime both S_{I} and S_{III} are large numbers in \hbar units, thus the condition S_I - S_{III} \sim 0 requires a large amount of fine tuning for the shape of the potential V(x).[Figure: Double barrier decay in QFT.The field in a false vacuum \varphi = \varphi _{+} can decay trough quantum tunneli...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 563, "openalex_id": "", "raw": "S. R. Coleman, “The Fate Of The False Vacuum. 1. Semiclassical Theory,” Phys. Rev. D 15, 2929 (1977) [Erratum-ibid. D 16, 1248 (1977)].", "source_ref_id": "bb216ff9780c70d6d7b555f677c26491296c...
10.1088/1126-6708/2008/09/077
0807.1732
Absence of resonant decay for metastable vacua in gauge theories of scalar fields
[ "M. Cardella", "S. Elitzur", "E. Rabinovici" ]
[ "hep-th" ]
2,008
en
Physics
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a65e290290a376177ea0cb392357a338795c6221
subsection
4
21
Resonant tunneling: From QM to QFT
If this happens one is forced to analytic continue the solution to real time t_E \rightarrow it_E = t at the point \tilde{t}_E where \partial _{t_E}\varphi (\tilde{t}_E , \vec{x})=0. Analytic continuation in \tilde{t}_E = \tilde{t} requires \partial _{t_E}\varphi (\tilde{t}_E , \vec{x})=0= \partial _{t}\varphi (\tilde{...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 2135, "openalex_id": "", "raw": "E. J. Copeland, A. Padilla and P. M. Saffin, “No resonant tunneling in quantum field theory,” arXiv:0709.0261 [hep-th].", "source_ref_id": "08d1809c4dd1ce76a5c5797be2920e18c9a03efe", "s...
10.1088/1126-6708/2008/09/077
0807.1732
Absence of resonant decay for metastable vacua in gauge theories of scalar fields
[ "M. Cardella", "S. Elitzur", "E. Rabinovici" ]
[ "hep-th" ]
2,008
en
Physics
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aeee6470f0ea217bee749c21bf9c39d8c9fd42de
subsection
5
21
Vacuum decay in a landscape potential and the question of quantum interference
As discussed at the end of the previous section, in order to have quantum interference in vacuum decay the existence of a Lorentzian solution \varphi (t, \vec{x}) defined on a time interval [t_1 , t_2 ] with non-vanishing action satisfying eq. (REF ) is required. Analytic continuation of \varphi to Euclidean signature ...
{ "cite_spans": [] }
10.1088/1126-6708/2008/09/077
0807.1732
Absence of resonant decay for metastable vacua in gauge theories of scalar fields
[ "M. Cardella", "S. Elitzur", "E. Rabinovici" ]
[ "hep-th" ]
2,008
en
Physics
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47035ac5d279f2b3981d88c7f3c52ee4494217ae
subsection
6
21
No resonant tunneling in a scalar field theory
Let us consider a scalar field theory in D = 1 + d space-time dimensions with Lagrangian\mathcal {L} = \frac{1}{2} \partial _{\mu } \varphi \partial ^{\mu } \varphi - V(\varphi ),where V(\varphi ) is a generic potential with various metastable vacua.A necessary condition for the field \varphi to have non-vanishing acti...
{ "cite_spans": [] }
10.1088/1126-6708/2008/09/077
0807.1732
Absence of resonant decay for metastable vacua in gauge theories of scalar fields
[ "M. Cardella", "S. Elitzur", "E. Rabinovici" ]
[ "hep-th" ]
2,008
en
Physics
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ade43006ecf6c823bf1106af32cd9b00c957f4e4
subsection
7
21
No resonant tunneling in a scalar field theory
Therefore I_{ii} can be computed at x_{i} = \infty , where it depends only on V(\varphi _+), since all the field derivatives go to zero at infinityI_{ii} &=& \lim _{x_{i} \rightarrow \infty } \int _{t_1}^{t_2}dx_0 \int \prod _{j \ne i}dx_{j} \cdot \\ && \left( \frac{1}{2}(\partial _{0}\varphi )^2 +\frac{1}{2}(\partial ...
{ "cite_spans": [] }
10.1088/1126-6708/2008/09/077
0807.1732
Absence of resonant decay for metastable vacua in gauge theories of scalar fields
[ "M. Cardella", "S. Elitzur", "E. Rabinovici" ]
[ "hep-th" ]
2,008
en
Physics
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2ed5cfb6832db278b80b197770627889fd395f46
subsection
8
21
No resonant tunneling in a scalar field theory
This shows that an intermediate analytic continuation to Lorentzian signature is impossible, and the full tunneling event is described by instanton fields in Euclidean signature. Thus one concludes that for the decaying of a metastable vacuum in a pure scalar field theory with a multi-vacua potential there is no quantu...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 996, "openalex_id": "", "raw": "P. M. Saffin, A. Padilla and E. J. Copeland, “Decay of an inhomogeneous state via resonant tunnelling,” arXiv:0804.3801 [hep-th].", "source_ref_id": "9a8362e0363e04b590e76c8db132bec353b88354",...
10.1088/1126-6708/2008/09/077
0807.1732
Absence of resonant decay for metastable vacua in gauge theories of scalar fields
[ "M. Cardella", "S. Elitzur", "E. Rabinovici" ]
[ "hep-th" ]
2,008
en
Physics
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b11f0026dfd96f8726dc0012fd40a8ca2ac00d9a
subsection
9
21
No resonant tunneling in a scalar field theory
This is achieved when there is a large enough region of Euclidean space where the field acquires values in classically allowed regions where V(\varphi ) < 0, such as the regions \varphi _1 < \varphi < \varphi _2 and \varphi > \varphi _3 for the potential in figure (REF ).
{ "cite_spans": [] }
10.1088/1126-6708/2008/09/077
0807.1732
Absence of resonant decay for metastable vacua in gauge theories of scalar fields
[ "M. Cardella", "S. Elitzur", "E. Rabinovici" ]
[ "hep-th" ]
2,008
en
Physics
[ -0.03156411647796631, 0.028511494398117065, -0.010699441656470299, 0.01727784238755703, -0.021398883312940598, -0.010974178090691566, 0.0030278197955340147, 0.010043127462267876, 0.0410577729344368, -0.013240749947726727, 0.0037375546526163816, 0.018071524798870087, 0.03327358514070511, -0...
70a45f5214f1b9f59adf8ad34bb10c7ac9a7b5b1
subsection
10
21
No quantum interference in the decay of a scalar field coupled to a gauge field
We study now whether a theory of a scalar field coupled to a gauge field admits non-constant classical field solutions of Lorentzian time signature that can be analiticaly continued to Euclidean signature in two separate occasions.We consider the Lagrangian\mathcal {L} = -\frac{1}{4}F^{a}_{\mu \nu }F^{a \mu \nu } + \fr...
{ "cite_spans": [] }
10.1088/1126-6708/2008/09/077
0807.1732
Absence of resonant decay for metastable vacua in gauge theories of scalar fields
[ "M. Cardella", "S. Elitzur", "E. Rabinovici" ]
[ "hep-th" ]
2,008
en
Physics
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25f5d587056be60534b6405087db88c70b0c67de
subsection
11
21
No quantum interference in the decay of a scalar field coupled to a gauge field
The Lorentzian classical solutions \varphi (t,\vec{x}) and A_{\mu }^{a}(t,\vec{x}) are then defined on the interval [t_1 , t_2 ], they dominate the path integral and have both vanishing time derivative at t=t_1 and t=t_2, as required by analytic continuation. In order to check if there is a degeneracy of Lorentzian mot...
{ "cite_spans": [] }
10.1088/1126-6708/2008/09/077
0807.1732
Absence of resonant decay for metastable vacua in gauge theories of scalar fields
[ "M. Cardella", "S. Elitzur", "E. Rabinovici" ]
[ "hep-th" ]
2,008
en
Physics
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dabbb8d8fc7318fb636d7f5e26505b23ae0061b5
subsection
12
21
No quantum interference in the decay of a scalar field coupled to a gauge field
The conclusion will be that field paths describing the full tunneling event are purely Euclidean and therefore there is no resonant decay.The overall T_{00} space integral is set to be equal to the total false vacuum energy V(\varphi _+)=0 that is our initial condition in time, therefore the space integral of T_{00} va...
{ "cite_spans": [] }
10.1088/1126-6708/2008/09/077
0807.1732
Absence of resonant decay for metastable vacua in gauge theories of scalar fields
[ "M. Cardella", "S. Elitzur", "E. Rabinovici" ]
[ "hep-th" ]
2,008
en
Physics
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286d43501f8869589c8a2e57a7661b453ef78aa1
subsection
13
21
Conclusions
We studied whether in a theory of a scalar field coupled to a gauge field a homogeneous metastable vacuum can decay in a resonant fashion. The answer turns out to be negative and thus our result generalizes the no go theorem for resonant tunneling in a pure scalar field theory . The proof follows the line of , appropri...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 279, "openalex_id": "", "raw": "E. J. Copeland, A. Padilla and P. M. Saffin, “No resonant tunneling in quantum field theory,” arXiv:0709.0261 [hep-th].", "source_ref_id": "08d1809c4dd1ce76a5c5797be2920e18c9a03efe", "st...
10.1088/1126-6708/2008/09/077
0807.1732
Absence of resonant decay for metastable vacua in gauge theories of scalar fields
[ "M. Cardella", "S. Elitzur", "E. Rabinovici" ]
[ "hep-th" ]
2,008
en
Physics
[ -0.02044931799173355, 0.0330851674079895, -0.032657865434885025, 0.011972008273005486, 0.008973282761871815, -0.03647303953766823, -0.024310272186994553, 0.03296308219432831, -0.02806439995765686, 0.03372611477971077, -0.015687985345721245, -0.014863907359540462, -0.02418818697333336, -0.0...
ad2f1d5e229341b9e0f80830e7edbdd0748c9d71
subsection
14
21
Tunneling through one barrier potential
Let us consider the tunneling problem represented in figure REF , the semiclassical wave function for a particle of unit mass with energy E in region I is given by\Psi _{I}(x) = \alpha _{I}^{R}\frac{e^{iS_{0}(x)/\hbar }}{ (2(E - V(x)))^{1/4}} + \alpha _{I}^{L}\frac{e^{-iS_{0}(x)/\hbar }}{(2(E - V(x)))^{1/4}},whereS_{0}...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1284, "openalex_id": "", "raw": "E. Merzbacher, Chapter 7, Quantum Mechanics, 2nd Edition, John Wiley, 1970.", "source_ref_id": "d40e2acfd88d518557f973b61b0d7b4e9e9a5102", "start": 920 } ] }
10.1088/1126-6708/2008/09/077
0807.1732
Absence of resonant decay for metastable vacua in gauge theories of scalar fields
[ "M. Cardella", "S. Elitzur", "E. Rabinovici" ]
[ "hep-th" ]
2,008
en
Physics
[ -0.01317231822758913, 0.016560792922973633, -0.023734593763947487, 0.03177840635180473, 0.03045049123466015, -0.0014662407338619232, -0.0006210297578945756, 0.040661707520484924, 0.01417970284819603, 0.04557652398943901, -0.015660252422094345, 0.003579268231987953, 0.013805748894810677, -0...
117904930958418b21b0ce77b16fd6a64adf855d
subsection
15
21
Tunneling through one barrier potential
It turns out that the correct wave function inside the barrier is given by summing the two contributions:\Psi _{II}(x) = e^{-\Theta } \left( \alpha _{I}^{R}e^{-i\pi /4} + \alpha _{I}^{L}e^{i\pi /4}\right) \frac{e^{-S_{0}^{^{\prime }}(x)/\hbar }}{(2(V(x) - E))^{1/4}} \\ + e^{\Theta } \left( \alpha _{I}^{R}e^{i\pi /4} + ...
{ "cite_spans": [] }
10.1088/1126-6708/2008/09/077
0807.1732
Absence of resonant decay for metastable vacua in gauge theories of scalar fields
[ "M. Cardella", "S. Elitzur", "E. Rabinovici" ]
[ "hep-th" ]
2,008
en
Physics
[ 0.037481408566236496, 0.05097227171063423, -0.03650469332933426, 0.01745876669883728, 0.006878967862576246, 0.0013820887543261051, -0.006520330440253019, 0.005123934242874384, 0.025943972170352936, 0.053719282150268555, -0.010095257312059402, 0.03757297620177269, 0.0013897193130105734, -0....
e4e69c0b94b3afd81b68cb2b75ba0571d32d1c79
subsection
16
21
Tunneling through one barrier potential
The wave function in region III x > x_2 outside the barrier is then given by\Psi _{III}(x) = \alpha _{III}^{R}\frac{e^{iS_{0}^{^{\prime \prime }}(x)/\hbar }}{ (2(E - V(x)))^{1/4}} + \alpha _{III}^{L}\frac{e^{-iS_{0}^{^{\prime \prime }}(x)/\hbar }}{(2(E - V(x)))^{1/4}},withS_{0}^{^{\prime \prime }}(x) = \frac{1}{\hbar }...
{ "cite_spans": [] }
10.1088/1126-6708/2008/09/077
0807.1732
Absence of resonant decay for metastable vacua in gauge theories of scalar fields
[ "M. Cardella", "S. Elitzur", "E. Rabinovici" ]
[ "hep-th" ]
2,008
en
Physics
[ 0.0007371468236669898, 0.01724141649901867, -0.03942639008164406, 0.013144672848284245, 0.01521211676299572, 0.024916134774684906, -0.0007628945168107748, 0.0370156429708004, -0.021147435531020164, 0.03667996823787689, -0.016646359115839005, 0.03521521016955376, 0.004405715968459845, -0.00...
b54dcba1489ff9151c2a7ee9587a525241ba3338
subsection
17
21
Tunneling through a double barrier potential
For a double barrier tunneling (fig.
{ "cite_spans": [] }
10.1088/1126-6708/2008/09/077
0807.1732
Absence of resonant decay for metastable vacua in gauge theories of scalar fields
[ "M. Cardella", "S. Elitzur", "E. Rabinovici" ]
[ "hep-th" ]
2,008
en
Physics
[ -0.015308523550629616, 0.02913656271994114, -0.03904207795858383, 0.025809286162257195, -0.0033062901347875595, 0.001716103870421648, -0.0024821022525429726, 0.015529833734035492, -0.02614506520330906, 0.029914962127804756, 0.017552146688103676, -0.0015882784500718117, 0.030128639191389084, ...
a0c29369c40ce8117f3049f2390047386cd49c1d
subsection
18
21
Tunneling through a double barrier potential
REF ) one can compute the full "rotation" matrix which rotates the wave function of region I into the wave function of region V\vec{\alpha }_{out} = \mathcal {R}_{\Theta _1}\mathcal {R}_{\delta }\mathcal {R}_{\Theta _2}\vec{\alpha }_{in},where \mathcal {R}_{\Theta _1}\mathcal {R}_{\delta }\mathcal {R}_{\Theta _2} is gi...
{ "cite_spans": [] }
10.1088/1126-6708/2008/09/077
0807.1732
Absence of resonant decay for metastable vacua in gauge theories of scalar fields
[ "M. Cardella", "S. Elitzur", "E. Rabinovici" ]
[ "hep-th" ]
2,008
en
Physics
[ -0.013429543934762478, 0.028491998091340065, -0.03455055505037308, 0.028186781331896782, 0.018038319423794746, 0.04975035786628723, -0.009621962904930115, 0.057258691638708115, 0.014513064175844193, 0.034428466111421585, -0.03574090078473091, 0.025439830496907234, -0.0023711537942290306, 0...
97952ea0a9ad64ad5037303f793a58953103c401
subsection
19
21
Tunneling through a double barrier potential
For \delta = 0 the two hyperbolic angles \Theta _1 and \Theta _2 sum together giving the sum of the rotations. The term in \sin \delta is the effect of the quantum interference, and it depends on the difference between \Theta _1 and \Theta _2.The tunneling probability can be closed to one in the resonant condition\delt...
{ "cite_spans": [] }
10.1088/1126-6708/2008/09/077
0807.1732
Absence of resonant decay for metastable vacua in gauge theories of scalar fields
[ "M. Cardella", "S. Elitzur", "E. Rabinovici" ]
[ "hep-th" ]
2,008
en
Physics
[ -0.06193358451128006, 0.010418876074254513, 0.007341265212744474, 0.04463489353656769, 0.0031348157208412886, 0.03343803435564041, -0.00016112647426780313, 0.055496152490377426, -0.015056268312036991, 0.04167550429701805, -0.0403331033885479, 0.031882066279649734, 0.01946484111249447, 0.00...
04fea8e508e65cb784779f62d69f9dc1ee9ac19c
subsection
20
21
Tunneling through
Given N barriers separated by N-1 classically allowed regions, the matrix which connects the wave functions on the two regions extending to infinity is given by \mathcal {R}_N = \prod _{k=1}^{N}\mathcal {R}_{\Theta _{k}}\mathcal {R}_{\delta _{k}}\mathcal {R}_N = \prod _{k=1}^{N} \begin{pmatrix} \cosh \Theta _k & -i \si...
{ "cite_spans": [] }
10.1088/1126-6708/2008/09/077
0807.1732
Absence of resonant decay for metastable vacua in gauge theories of scalar fields
[ "M. Cardella", "S. Elitzur", "E. Rabinovici" ]
[ "hep-th" ]
2,008
en
Physics
[ 0.01067669503390789, 0.05632166191935539, -0.005242951679974794, 0.0016570244915783405, 0.0007154682534746826, 0.030999809503555298, -0.00033436217927373946, 0.047560516744852066, 0.0020471932366490364, 0.05445953831076622, -0.00045408387086354196, 0.005582560319453478, 0.023032354190945625,...
ecf7e9f7eb2bd5270dd0260b27e33f1a998d0ba8
abstract
0
43
Abstract
The nonlinear perturbation theory of gravitational instability is extended to include effects of both biasing and redshift-space distortions, which are inevitable in predicting observable quantities in galaxy surveys. The precise determination of scales of baryon acoustic oscillations is crucial to investigate the natu...
{ "cite_spans": [] }
10.1103/PhysRevD.78.083519 10.1103/PhysRevD.78.109901
0807.1733
Nonlinear perturbation theory with halo bias and redshift-space distortions via the Lagrangian picture
[ "Takahiko Matsubara" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.035029031336307526, 0.007773210294544697, -0.04100959748029709, 0.005034660454839468, 0.025325866416096687, -0.021954171359539032, 0.023113667964935303, -0.011892477981746197, -0.011900106444954872, 0.026897290721535683, -0.05751718208193779, -0.006426820065826178, -0.0059157260693609715,...
a0fbccd623b111ecbc9313ca436bf083b129a1b5
subsection
1
43
Introduction
The nonlinear perturbation theory of gravitational instability has recently attracted renewed interest. As precision measurements of the large-scale structure of the universe become possible, theoretically accurate modeling is essential to interpret the observational data. It is recognized that the linear perturbation ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 825, "openalex_id": "", "raw": "P. J. E. Peebles and J. T. Yu, 162, 815 (1970); R. A. Sunyaev and Y. B. Zel'dovich, Astrophys. Space Sci.7, 3 (1970); J. R. Bond and G. Efstathiou, Astrophys. J. Letters, 285, L45 (1984); J. R. Bond...
10.1103/PhysRevD.78.083519 10.1103/PhysRevD.78.109901
0807.1733
Nonlinear perturbation theory with halo bias and redshift-space distortions via the Lagrangian picture
[ "Takahiko Matsubara" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.041064999997615814, 0.010289131663739681, -0.037312403321266174, 0.003931836225092411, 0.020151138305664062, -0.030051281675696373, 0.028174983337521553, -0.011028972454369068, -0.002820167923346162, 0.0486312098801136, -0.0460684597492218, -0.017329063266515732, -0.013492567464709282, ...
f72c81407d9f6e29034c3968c4f7976032e2865c
subsection
2
43
Introduction
Extending the linear formula of Eq. (REF ) to include nonlinear effects is far from trivial. A straightforward application of the nonlinear perturbation theory , , , with a local biasing scheme has been studied so far , , , . In the local biasing scheme, the number density of biased objects is a local function of the s...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 227, "openalex_id": "", "raw": "R. Juszkiewicz, Mon. Not. R. Astron. Soc., 197, 931 (1981); E. T. Vishniac, Mon. Not. R. Astron. Soc., 203, 345 (1983); J. N. Fry, , 279, 499 (1984); B. Jain and E. Bertschinger, , 431, 495 (1994)."...
10.1103/PhysRevD.78.083519 10.1103/PhysRevD.78.109901
0807.1733
Nonlinear perturbation theory with halo bias and redshift-space distortions via the Lagrangian picture
[ "Takahiko Matsubara" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.016545090824365616, -0.0023218838032335043, -0.04380480945110321, 0.02652709372341633, 0.026496566832065582, -0.019200854003429413, 0.013095653615891933, -0.010737519711256027, 0.00520468270406127, 0.009638584218919277, -0.028572333976626396, 0.031747039407491684, 0.009249377995729446, ...
b3fa658ddd25c7fb60cf21a86d4d6e7725d01c7f
subsection
3
43
Introduction
However, the dynamical evolution of haloes is more naturally described in the Lagrangian picture . It is not straightforward to obtain an analytically useful formalism which combines the LPT and the halo approach. A main obstacle is that the observable quantities reside in Eulerian space, while the calculations in LPT ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 98, "openalex_id": "", "raw": "P. Catelan, F. Lucchin, S. Matarrese, and C. Porciani, Mon. Not. R. Astron. Soc., 297, 692 (1998); P. Catelan, S. Matarrese, and C. Porciani, Astrophys. J. Letters, 502, L1 (1998).", "source_re...
10.1103/PhysRevD.78.083519 10.1103/PhysRevD.78.109901
0807.1733
Nonlinear perturbation theory with halo bias and redshift-space distortions via the Lagrangian picture
[ "Takahiko Matsubara" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.016572317108511925, 0.05026631057262421, -0.03692910447716713, 0.0011340058408677578, 0.01986846886575222, -0.03056570142507553, 0.011071101762354374, -0.0033152264077216387, 0.003975219558924437, 0.02807832695543766, -0.0377836637198925, 0.0284293070435524, 0.03506739065051079, 0.01317...
f4e5c7717f1ffc4420a77b62ce4e4b0258d62bee
subsection
4
43
Nonlinear power spectrum with a local Lagrangian bias
In this section, we develop a method to track nonlinear evolution of the Lagrangian bias. Our method in this section is not restricted to the halo bias model, and is applicable to any bias defined by a local function of linear density field in Lagrangian space.In the Lagrangian approach to track dynamical evolution of ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 2367, "openalex_id": "", "raw": "H. J. Mo and S. D. M. White, Mon. Not. R. Astron. Soc., 282, 347 (1996).", "source_ref_id": "ab47d1498ac4381a82e7bccfbe76d88412e0a0e6", "start": 2263 }, { "arxiv_id": "", ...
10.1103/PhysRevD.78.083519 10.1103/PhysRevD.78.109901
0807.1733
Nonlinear perturbation theory with halo bias and redshift-space distortions via the Lagrangian picture
[ "Takahiko Matsubara" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.02754347026348114, -0.0010843811323866248, -0.05511745810508728, 0.015023017302155495, -0.0028649787418544292, -0.036622896790504456, 0.0034848975483328104, -0.02794021926820278, -0.007046092767268419, 0.022751973941922188, -0.017517952248454094, 0.007442840840667486, -0.00232326495461165...
562fe1071410a568f77533ff2b81f174918cfe41
subsection
5
43
Nonlinear power spectrum with a local Lagrangian bias
The locality of bias in Lagrangian space does not mean locality in Eulerian space, because of evolutionary effects. Therefore our biasing scheme does not fall into the category of the local biasing scheme in a usual context of EPT. The local Lagrangian bias is nonlocal in Eulerian space.Thus, we introduce a Lagrangian ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1776, "openalex_id": "", "raw": "J. R. Bond and H. M. P. Couchman, in Proceedings of the 2nd Canadian Conference on General Relativity and Relativistic Astrophysics (World Scientific, Singapore, 1988), p. 385; A. N. Taylor, in Cos...
10.1103/PhysRevD.78.083519 10.1103/PhysRevD.78.109901
0807.1733
Nonlinear perturbation theory with halo bias and redshift-space distortions via the Lagrangian picture
[ "Takahiko Matsubara" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.048073671758174896, 0.009439227171242237, -0.045204512774944305, 0.0011923033744096756, 0.01146900374442339, -0.050027139484882355, 0.019824665039777756, 0.013842164538800716, 0.03017195127904415, 0.012262601405382156, -0.035192977637052536, 0.042884767055511475, 0.012842537835240364, 0...
27fb54b344eebf31849acc369600164cec7e52f2
subsection
6
43
Nonlinear power spectrum with a local Lagrangian bias
Our convention of the power spectrum is given by\left\langle \tilde{\delta }_{\rm obj}({k}) \tilde{\delta }_{\rm obj}({k}^{\prime }) \right\rangle = (2\pi )^3 \delta ^3_{\rm D}({k} + {k}^{\prime }) P_{\rm obj}({k}),where\tilde{\delta }_{\rm obj}({k}) = \int d^3x\, e^{-i{k}\cdot {x}} \left[ \frac{\rho ^{\rm E}_{\rm obj}...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 788, "openalex_id": "", "raw": "S.-K. Ma, Statistical Mechanics (World Scientific, Singapore, 1985), Sec. 12", "source_ref_id": "00e22d8af5de40b738a83d3eb15345c838aaa36e", "start": 507 }, { "arxiv_id": ""...
10.1103/PhysRevD.78.083519 10.1103/PhysRevD.78.109901
0807.1733
Nonlinear perturbation theory with halo bias and redshift-space distortions via the Lagrangian picture
[ "Takahiko Matsubara" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.06043776497244835, 0.02927263453602791, -0.0485944040119648, -0.03818567842245102, -0.026952801272273064, -0.042275913059711456, 0.027532760053873062, 0.025609740987420082, 0.04847230762243271, 0.03516378998756409, -0.017566634342074394, 0.04947960376739502, -0.030066262930631638, 0.001...
b0d3038391cd55cf7191452ec12b91598a062cae
subsection
7
43
Nonlinear power spectrum with a local Lagrangian bias
(REF ) thus reduces to\left\langle e^{i[ \lambda _1\delta _R({q}_1) + \lambda _2\delta _R({q}_2) ] -i{k}\cdot [ {\Psi }({q}_1) - {\Psi }({q}_2) ] } \right\rangle \\ = \exp \left[ \sum _{n_1 + n_2 + m_1 + m_2 \ge 1} \frac{i^{n_1 + n_2 + m_1 + m_2}}{n_1!n_2!m_1!m_2!} {\lambda _1}^{n_1} {\lambda _2}^{n_2} B^{n_1 n_2}_{m_1...
{ "cite_spans": [] }
10.1103/PhysRevD.78.083519 10.1103/PhysRevD.78.109901
0807.1733
Nonlinear perturbation theory with halo bias and redshift-space distortions via the Lagrangian picture
[ "Takahiko Matsubara" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.056086890399456024, 0.01196194812655449, -0.005477473605424166, -0.014937177300453186, -0.019194044172763824, 0.022916896268725395, 0.02396966889500618, 0.01139741763472557, 0.02058248408138752, 0.0230084415525198, -0.04061569646000862, 0.045070912688970566, -0.027250049635767937, 0.041...
1c627b65cde4e6faa1f7c4b8236bfc67bc0ec214
subsection
8
43
Nonlinear power spectrum with a local Lagrangian bias
(REF ) is symmetric with respect to its indices:B^{n_1 n_2}_{m_1 m_2}({k},{q}) = B^{n_2 n_1}_{m_2 m_1}({k},{q}).When the initial density field is random Gaussian, which is assumed throughout this paper, the Equation (REF ) of m_1=m_2=0 survives only when n_1 + n_2 = 2:B^{n_1 n_2}_{00}({k}, {q}) = {\left\lbrace \begin{a...
{ "cite_spans": [] }
10.1103/PhysRevD.78.083519 10.1103/PhysRevD.78.109901
0807.1733
Nonlinear perturbation theory with halo bias and redshift-space distortions via the Lagrangian picture
[ "Takahiko Matsubara" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.057279519736766815, 0.03176770359277725, -0.00419220793992281, -0.05694383755326271, -0.01750122755765915, 0.0074879927560687065, -0.0031031493563205004, 0.009254137054085732, 0.04632408916950226, 0.015540541149675846, -0.03460574150085449, 0.015151455998420715, 0.013579854741692543, -0...
5ec8abeac5bdc294d3ce5bc416e4af57947c46fa
subsection
9
43
Nonlinear power spectrum with a local Lagrangian bias
(REF ), we obtain an expression,P_{\rm obj}({k}) = \exp \left[ 2 \sum _{m=1}^\infty \frac{(-1)^m}{(2m)!} A_{2m}({k}) \right] \int d^3q\, e^{-i{k}\cdot {q}} \exp \left[ \sum _{m_1, m_2 \ge 1}^\infty \frac{ i^{m_1 + m_2}}{m_1!m_2!} B_{m_1 m_2}({k}, {q}) \right] \\ \times \int _{-\infty }^\infty \frac{d\lambda _1}{2\pi } ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1189, "openalex_id": "", "raw": "T. Matsubara, , 77, 063530 (2008) (paper I).", "source_ref_id": "4326df28d4135c560a4a2389e1317f62fd6e035d", "start": 938 } ] }
10.1103/PhysRevD.78.083519 10.1103/PhysRevD.78.109901
0807.1733
Nonlinear perturbation theory with halo bias and redshift-space distortions via the Lagrangian picture
[ "Takahiko Matsubara" ]
[ "astro-ph" ]
2,008
en
Physics
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c20ef1cc4f6c0fc0168407e847989a4086a07c51
subsection
10
43
Nonlinear power spectrum with a local Lagrangian bias
In the integrand of \lambda _1 and \lambda _2, we expand the last exponential factor, keeping the exponential prefactor which involves \sigma _R^2. In a large-scale limit, \sigma _R^2 \gg \xi _R(|{q}|) because |{q}| is large, and \sigma _R^2 \gg B^{n_1 n_2}_{m_1 m_2} (m_1 + m_2 \ge 1) because |{k}| is small. Therefore,...
{ "cite_spans": [] }
10.1103/PhysRevD.78.083519 10.1103/PhysRevD.78.109901
0807.1733
Nonlinear perturbation theory with halo bias and redshift-space distortions via the Lagrangian picture
[ "Takahiko Matsubara" ]
[ "astro-ph" ]
2,008
en
Physics
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be7c0a47aa51aa094996e663e41f0eab26eeb8b1
subsection
11
43
Nonlinear power spectrum with a local Lagrangian bias
In our derivation, we have used an approximation \sigma _R^2 \gg \xi _R(|{q}|), which means our equations are valid on larger scales than the smoothing radius of the Lagrangian bias: k \ll R^{-1}. In particular, the smoothing kernel W(kR) in final expressions of our perturbation theory is replaced by unity, for consist...
{ "cite_spans": [] }
10.1103/PhysRevD.78.083519 10.1103/PhysRevD.78.109901
0807.1733
Nonlinear perturbation theory with halo bias and redshift-space distortions via the Lagrangian picture
[ "Takahiko Matsubara" ]
[ "astro-ph" ]
2,008
en
Physics
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5413e94d7731a4a58eba6fd7ddbef9851b682012
subsection
12
43
Biased power spectrum from Lagrangian perturbation theory
We evaluate the general Eq. (REF ) via the LPT as outlined in the previous section. Details of derivations by the one-loop perturbation theory are given in the Appendix. In this subsection, we summarize basic assumptions made in the derivations.As explained above, we need to evaluate the cumulants B_{m_1m_2}^{n_1n_2}({...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1074, "openalex_id": "", "raw": "F. Bernardeau, S. Colombi, E. Gaztañaga, and R. Scoccimarro, Phys. Rep., 367, 1 (2002).", "source_ref_id": "b93944a6cfe6a7a397e6130a748d56e680d26e26", "start": 945 }, { "a...
10.1103/PhysRevD.78.083519 10.1103/PhysRevD.78.109901
0807.1733
Nonlinear perturbation theory with halo bias and redshift-space distortions via the Lagrangian picture
[ "Takahiko Matsubara" ]
[ "astro-ph" ]
2,008
en
Physics
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f9584613b90a5c6d8fba16c37f496be99ec9db3b
subsection
13
43
Biased power spectrum from Lagrangian perturbation theory
With those approximations, order-by-order linear transformations of displacement fields become particularly simple: {\Psi }^{{\rm s}(n)} = R^{(n)} {\Psi }^{(n)}, where R^{(n)} is a 3\times 3 matrix whose components are given by Eq. (REF ).Keeping the one-loop LPT exact, the integrand of Eq. (REF ) turns out to be a str...
{ "cite_spans": [] }
10.1103/PhysRevD.78.083519 10.1103/PhysRevD.78.109901
0807.1733
Nonlinear perturbation theory with halo bias and redshift-space distortions via the Lagrangian picture
[ "Takahiko Matsubara" ]
[ "astro-ph" ]
2,008
en
Physics
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caca733fe014f0a70b68984dde634c3ed06e5b28
subsection
14
43
The linear power spectrum in real space and in redshift space
Expanding Eq. (REF ) and keeping only linear terms in P_{\rm L}(k), we obtain the biased power spectrum in linear perturbation theory. The result in real space is simply given by a linear term of Eq. (REF ) with a substitution f=0,P_{\rm obj}(k) = \left( 1 + \langle F^{\prime } \rangle \right)^2 P_{\rm L}(k).Since the ...
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10.1103/PhysRevD.78.083519 10.1103/PhysRevD.78.109901
0807.1733
Nonlinear perturbation theory with halo bias and redshift-space distortions via the Lagrangian picture
[ "Takahiko Matsubara" ]
[ "astro-ph" ]
2,008
en
Physics
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fea64de31b8741aeb7408c9f2c23bb897311162b
subsection
15
43
The linear power spectrum in real space and in redshift space
Again, it is interesting to notice that we have derived the Kaiser's formula in the presence of any nonlinear local bias in Lagrangian space: the Kaiser's formula with a scale-independent bias is a general consequence of a large-scale limit even in this framework.
{ "cite_spans": [] }
10.1103/PhysRevD.78.083519 10.1103/PhysRevD.78.109901
0807.1733
Nonlinear perturbation theory with halo bias and redshift-space distortions via the Lagrangian picture
[ "Takahiko Matsubara" ]
[ "astro-ph" ]
2,008
en
Physics
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f3cc72dbc87e1649ebbbe1f745f94f91da794f92
subsection
16
43
One-loop corrections to the biased power spectrum
The formal expression of Eq. (REF ) is evaluated by applying the LPT. The derivation of one-loop corrections to the power spectrum is detailed in the Appendix. The power spectrum in real space with one-loop corrections is given by putting f=0 in Eq. (REF ). The result is&P_{\rm obj}(k) = \exp \left[-\left(k/k_{\rm NL}\...
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10.1103/PhysRevD.78.083519 10.1103/PhysRevD.78.109901
0807.1733
Nonlinear perturbation theory with halo bias and redshift-space distortions via the Lagrangian picture
[ "Takahiko Matsubara" ]
[ "astro-ph" ]
2,008
en
Physics
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a1d28505e6d29152315d8d47bfdffca5b5614796
subsection
17
43
One-loop corrections to the biased power spectrum
(REF ):&P^{\rm (s)}_{\rm obj}({k}) = \exp \left\lbrace -\left[1 + f(f+2)\mu ^2\right] \left(k/k_{\rm NL}\right)^2 \right\rbrace \\ &\quad \times \left[ \left( 1 + \langle F^{\prime } \rangle + f\mu ^2 \right)^2 P_{\rm L}(k) + \sum _{n,m} \mu ^{2n} f^m E_{nm}(k) \right],where E_{nm}(k) is given by Eqs. (REF )–(REF ). W...
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10.1103/PhysRevD.78.083519 10.1103/PhysRevD.78.109901
0807.1733
Nonlinear perturbation theory with halo bias and redshift-space distortions via the Lagrangian picture
[ "Takahiko Matsubara" ]
[ "astro-ph" ]
2,008
en
Physics
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47f3761fa069fabfa456f301ad30fb3804035bb1
subsection
18
43
One-loop corrections to the biased power spectrum
(REF )–(REF ) in the Appendix. All of these functions but Q_{13}(k) vanish in a large-scale limit k \rightarrow 0. The function Q_{13}(k) contributes only when \langle F^{\prime \prime }\rangle \ne 0. Thus, the one-loop contributions are present even in a large-scale limit through Q_{13}(k) when \langle F^{\prime \prim...
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10.1103/PhysRevD.78.083519 10.1103/PhysRevD.78.109901
0807.1733
Nonlinear perturbation theory with halo bias and redshift-space distortions via the Lagrangian picture
[ "Takahiko Matsubara" ]
[ "astro-ph" ]
2,008
en
Physics
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