id large_stringlengths 9 16 | title large_stringlengths 1 382 | abstract large_stringlengths 3 6.09k | publish_date date32 | update_date date32 | categories large listlengths 1 13 | authors large_stringlengths 3 62.8k |
|---|---|---|---|---|---|---|
hep-ph/9412202 | High-colour pomerons with a running coupling constant in the
Hartree-Fock approximation | The Hartree-Fock approximation is applied to study the "high-colour pomerons"
in the system of many reggeized gluons with a running QCD coupling constant. It
is shown that, contrary to the fixed coupling case, the high-colour pomerons
result supercritical, although with a smaller intercept than the multipomeron
states. | 1994-12-01 | 2009-10-28 | [
"hep-ph"
] | M. A. Braun |
hep-ph/9412206 | Nonoblique Corrections in Technicolor Theories Revisited | In extended technicolor (ETC) theories, while the sideways ETC boson exchange
decreases the width $\Gamma_b \equiv \Gamma (Z\rightarrow b \bar{b})$, the
flavor-diagonal ETC boson exchange tends to increase it, and the ETC-corrected
$R_b \equiv \Gamma_b / \Gamma_{\mbox{\footnotesize had}}$ value could agree
with recent ... | 1994-12-01 | 2009-10-28 | [
"hep-ph"
] | Guo-Hong Wu |
hep-ph/9411440 | Thermal Self-Energies at Zero Momentum | In general the zero momentum limit of thermal self-energies calculated in
perturbation theory depends on the order in which the time and the space
components of the momentum are taken to zero. We show that this is an artifact
of the perturbative calculation, and in fact the non-analyticity of the
one-loop self-energy d... | 1994-11-30 | 2009-10-28 | [
"hep-ph",
"hep-th"
] | Jose F. Nieves and Palash B. Pal |
hep-ph/9411429 | Some Phenomenological Implications of String Loop Effects | We investigate low energy implications of string loop corrections to
supergravity couplings which break a possible flavor universality of the tree
level. If Supersymmetry is broken by the dilaton $F$-term, universal soft
scalar masses arise at the leading order but string loop corrections
generically induce flavor-non-... | 1994-11-30 | 2010-11-01 | [
"hep-ph",
"hep-th"
] | Jan Louis, Yosef Nir |
hep-ph/9411439 | Radiative Non-Leptonic Kaon Decays | We investigate to what extent DA$\Phi$NE will be able to test the Standard
Model in the confinement regime with radiative kaon decays. We concentrate on
processes which can be detected at DA$\Phi$NE and we review briefly those
decays where only upper limits can be expected. The Standard Model predictions
for these deca... | 1994-11-30 | 2007-05-23 | [
"hep-ph"
] | G. D'Ambrosio, G. Ecker, G. Isidori and H. Neufeld |
hep-ph/9411437 | Change with energy of source geometry as seen in hadron interferometry | The variation of radii, lifetimes, correlation lengths and the chaoticity
parameter of particle sources with the collision energy $\sqrt{s}$ is studied
by analysing and comparing two-particle Bose-Einstein correlation data obtained
by the NA22 Collaboration at $\sqrt{s}=22\ GeV$ and by the UA1-Minimum-Bias
Collaboratio... | 1994-11-30 | 2007-05-23 | [
"hep-ph"
] | I.V. Andreev, M. Pl\"umer, B.R. Schlei and R.M. Weiner |
hep-ph/9411438 | Heavy Quark Production in pp Collisions | A systematic study of the inclusive single heavy quark and heavy-quark pair
production cross sections in pp collisions is presented for RHIC and LHC
energies. We compare with existing data when possible. The dependence of the
rates on the renormalization and factorization scales is discussed. Predictions
of the cross s... | 1994-11-30 | 2015-06-25 | [
"hep-ph"
] | R. V. Gavai, S. Gupta, P.L. McGaughey, E. Quack, P. V. Ruuskanen, R.
Vogt and Xin-Nian Wang |
hep-ph/9411441 | Constructing CP-Odd Observables | In these lectures we review the general features necessary to construct $\cp$
odd observables and study illustrative examples. We present in some detail the
case of $\cp$ violation in hyperon decays. We survey different observables
sensitive to $\cp$ violating new physics, concentrating on the search for
electric-dipol... | 1994-11-30 | 2021-07-21 | [
"hep-ph"
] | G. Valencia (Iowa State University) |
hep-ph/9411432 | Gamma--Ray Bursters, Neutrinos, and Cosmology | Gamma ray burst (GRB) objects are now widely thought to be at cosmological
distances, and thus represent enormous energy emission. Gamma ray spectra
extending to $GeV$ energies suggest the possiblity of accompanying neutrino
emission, and there are several models proposed suggesting the potential
detectability of such ... | 1994-11-30 | 2007-05-23 | [
"hep-ph",
"astro-ph",
"gr-qc"
] | T.J. Weiler, W.A. Simmons, S. Pakvasa and J.G. Learned |
hep-ph/9411443 | Inflation from superstrings | We investigate the possibility of obtaining inflationary solutions of the
slow roll type from a low energy Lagrangian coming from superstrings. The
advantage of such an approach is that in these theories the scalar potential
has only one free parameter (the Planck scale) and therefore no unnatural fine
tuning may be ac... | 1994-11-30 | 2009-10-28 | [
"hep-ph",
"astro-ph"
] | A. De la Macorra and S. Lola |
hep-ph/9411434 | The F/D Ratios of Spin-flip Baryon Vertex in 1/N_c Expansion | We calculate the $F/D$ ratios of spin 1/2 baryon vertex for both the
non-relativistic quark model and the chiral soliton model with arbitrary number
of color degrees of freedom $N_c$ and examine the results in terms of the
consistency condition approach for the baryon vertices recently developed by
Dashen, Jenkins and ... | 1994-11-30 | 2017-02-01 | [
"hep-ph"
] | Akira Takamura, Shoji Sawada and Shinsaku Kitakado |
hep-ph/9411431 | Rates for Inclusive Deep-Inelastic Electroproduction of Charm Quarks at
HERA | The coefficient functions for heavy-flavour production in deeply inelastic
electron-hadron scattering have been calculated previously. Analytic
expressions are impossible to publish due to their length. Therefore we have
tabulated them as two-dimensional arrays as is often done for the
scale-dependent parton densities.... | 1994-11-30 | 2011-07-19 | [
"hep-ph"
] | S. Riemersma, J. Smith and W.L. van Neerven |
hep-ph/9411444 | On pi-pi Correlations in Polarized Quark Fragmentation Using the Linear
Sigma Model | Using the linear sigma model to describe quark--pion interactions, we compute
polarization asymmetries in quark fragmentation. We show that the effects of
transverse quark polarizations appear in the correlation between the two
leading pions in a jet produced by the fragmentation of a quark. Such
asymmetries provide a ... | 1994-11-30 | 2008-02-03 | [
"hep-ph"
] | John C. Collins and Glenn A. Ladinsky |
hep-ph/9411442 | CP Violation in Hyperon Decays | In this talk we review the status of the theoretical estimates for CP
violating asymmetries in non-leptonic hyperon decays. | 1994-11-30 | 2010-11-01 | [
"hep-ph"
] | G. Valencia (Iowa State University) |
hep-ph/9411430 | Kaon Condensation in the Bound-State Approach to the Skyrme Model | We explore kaon condensation using the bound-state approach to the Skyrme
model on a 3-sphere. The condensation occurs when the energy required to
produce a $K^-$ falls below the electron fermi level. This happens at the
baryon number density on the order of 3--4 times nuclear density. | 1994-11-30 | 2016-08-24 | [
"hep-ph"
] | Karl M. Westerberg |
hep-ph/9411433 | Quenched Chiral Perturbation Theory for Heavy-Light Mesons | Quenched chiral perturbation theory is extended to include heavy-light
mesons. Non-analytic corrections to the decay constants, Isgur-Wise function
and masses and mixing of heavy mesons are then computed. The results are used
to estimate the error due to quenching in lattice computations of these
quantities. For reason... | 1994-11-30 | 2010-11-01 | [
"hep-ph"
] | Michael J. Booth |
hep-ph/9411424 | Application of Current Algebra in Three Pseudoscalar Meson Decays of
$\tau$ Lepton | The decays of $\tau \to 3\pi \nu $ and $\tau \to \pi K^{*} \nu, K\rho \nu $
are calculated using the hard pion and kaon current algebra and assuming the
Axial-Vector meson dominance of the hadronic axial currents. Using the
experimental data on their masses and widths, the $\tau$ decay branching ratios
into these chann... | 1994-11-29 | 2009-10-28 | [
"hep-ph"
] | L. Beldjoudi and Tran N. Truong |
hep-ph/9411416 | Renormalization-Group Flow Analysis of Meson Condensations in Dense
Matter | We present a renormalization-group (RG) flow argument for s-wave kaon
condensation in dense nuclear-star matter predicted in chiral perturbation
theory. It is shown that it is the {\it relevant} mass term together with {\it
any} attractive interaction for the kaon in medium that triggers the
instability. We show that a... | 1994-11-29 | 2009-10-28 | [
"hep-ph",
"nucl-th"
] | Hyun Kyu Lee, Mannque Rho and Sang-Jin Sin |
hep-ph/9411425 | Supersonic String Model for Witten Vortices | A new cosmic string model specified by two independent mass parameters is
introduced for the purpose of providing a realistic representation of the
macroscopic dynamical behaviour of Witten type (superconducting) vortex defects
of the vacuum. Unlike the self dual single mass parameter models previously
used for this pu... | 1994-11-29 | 2010-12-13 | [
"hep-ph",
"astro-ph",
"gr-qc",
"hep-th"
] | Brandon Carter and Patrick Peter |
hep-ph/9411423 | $\tau \to \pi K \nu$ Decay and $\pi K$ Scattering | Using chiral low energy theorems and elastic unitarity assumption, the
$\tau\to\pi K \nu $ decay is investigated. The vector and scalar $\pi K$ form
factors are calculated. It is found that the $\pi K$ spectrum is dominated by
the $K^*$ resonance. By measuring the forward-backward asymmetry, it is shown
that the S wave... | 1994-11-29 | 2009-10-28 | [
"hep-ph"
] | L. Beldjoudi and Tran N. Truong |
hep-ph/9411426 | Topcolor Assisted Technicolor | A condensate, $\overline{t}t$, arising from $O(TeV)$ scale ``topcolor,'' in
addition to technicolor (and ETC) may naturally explain the gauge hierarchy,
the large top quark mass, and contains a rich system of testable consequences.
A triplet of strongly coupled pseudo--Nambu--Goldstone bosons, ``top-pions,''
near the t... | 1994-11-29 | 2011-01-27 | [
"hep-ph"
] | Christopher T. Hill |
hep-ph/9411418 | Semileptonic tau decays, structure functions, kinematics and
polarisation | The most general angular distribution of two or three meson final states from
semileptonic decays $\tau\rightarrow \pi\pi\nu$, $K\pi\nu$, $\pi\pi\pi\nu$,
$K\pi\pi\nu$, $K\pi\nu$, $KKK\nu$, $\eta\pi\pi\nu,\,\ldots{}$ of polarized
$\tau$ leptons can be characterized by 16 structure functions. Predictions for
hadronic mat... | 1994-11-29 | 2011-07-19 | [
"hep-ph"
] | J.H. K\"uhn and E. Mirkes |
hep-ph/9411422 | Soft Gluon Suppression of $ 1/N_{c} $ Contributions in Color Suppressed
Heavy Meson Decays | We discuss the non-factorizable terms in color suppressed (Class II) decays.
Our emphasis is on the non-perturbative soft gluon exchange mechanism, which
has been previously found to be responsible for the rule of discarding $
1/N_{c} $ in the Class I decays. The non-factorizable contribution to the
decays $ \bar{B}^{0... | 1994-11-29 | 2009-10-28 | [
"hep-ph"
] | Igor Halperin |
hep-ph/9411421 | Extended Chiral Transformations Including Diquark Fields as Parameters | We introduce extended chiral transformation, which depends both on
pseudoscalar and diquark fields as parameters and determine its group
structure. Assuming soft symmetry breaking in diquark sector, bosonisation of a
quasi-Goldstone $ud$-diquark is performed. In the chiral limit the $ud$-diquark
mass is defined by the ... | 1994-11-29 | 2009-10-28 | [
"hep-ph"
] | Yuri Novozhilov, Andrei Pronko and Dmitri Vassilevich |
hep-ph/9411420 | Effective Lagrangians for Light Quarks | The class of phenomenological Lagrangians used for light constituent quarks
is discussed. The Nambu-Jona-Lasinio model is then argued to be a good
phenomenological choice and the quality of its prediction in the purely
hadronic sector including several relations between parameters illustrated.
Then we use these models ... | 1994-11-29 | 2007-05-23 | [
"hep-ph"
] | Johan Bijnens |
hep-ph/9411435 | Observing Virtual LSPs at LEP II | In the minimal supersymmetric extension of the Standard Model (MSSM) with
$R$-parity conservation the possibility that the sneutrino and the second
lightest neutralino decay dominantly into invisible channels and, in addition
to the lightest neutralino, carry missing energy, is still open --- both
theoretically and exp... | 1994-11-29 | 2009-10-28 | [
"hep-ph"
] | Amitava Datta, Aseshkrishna Datta and Sreerup Raychaudhuri |
hep-ph/9411414 | Limits on Electron-Neutrino Oscillations from the GALLEX $^{51}$Cr
Source Experiment | The recent result from the chromium source experiment carried out by the
GALLEX collaboration implies interesting limits on the parameters $\Delta m^2$
and $\sin^22\theta$ describing neutrino oscillations. Values of $\Delta
m^2~>~0.17$ eV$^2$ for maximal mixing and of $\sin^22\theta > 0.38$ for $\Delta
m^2 > 1$~eV$^2$ ... | 1994-11-29 | 2009-10-07 | [
"hep-ph"
] | J.N. Bahcall, P.I. Krastev and E. Lisi |
hep-ph/9411436 | A general framework with two Higgs doublets and suppressed FCNC | We investigated a general framework of the Standard Model with two Higgs
doublets (2HDSM) with suppressed flavor-changing neutral currents (FCNC's).
Loop-induced FCNC (and CP-violating) effects, when confronted with experimental
constraints for the $K$-$\bar K$, $B$-$\bar B$ and $D$-$\bar D$ mixing and for
the $(b \to ... | 1994-11-29 | 2009-09-25 | [
"hep-ph"
] | Gorazd Cvetic |
hep-ph/9411419 | Lepton-Quark Masses and Democratic Symmetry | It is shown that the simplest breaking of the subnuclear democracy leads to a
successful description of the mixing between the second and third family. In
the lepton channel the nu_mu - nu_tau -oscillations are expected to be
described by a mixing angle of 2.65 degrees which might be observed soon in
neutrino experimen... | 1994-11-29 | 2009-10-28 | [
"hep-ph"
] | Harald Fritzsch |
hep-ph/9411427 | The current of fermions scattered off a bubble wall | Proceeding from WKB quantization conditions, we derive a semiclassical
expression for the current of fermions scattered off a propagating bubble wall
in the presence of longitudinal gauge field. It agrees with the expression used
by Nasser and Turok in semiclassical analysis of instability of electroweak
bubble walls w... | 1994-11-29 | 2010-11-01 | [
"hep-ph"
] | S.Yu. Khlebnikov |
hep-ph/9411415 | Multi-Pion Correlation Effects on Two-Pion Interferometry | A general derivation of the multi-pion correlation function for completely
chaotic source is given. Its effects on the pion multiplicity distribution,
two-pion interferometry are studied. A generalized multi-pion correlation
function for a partially coherent source is also discussed. | 1994-11-29 | 2015-06-25 | [
"hep-ph"
] | Chao wei-qin, Gao chong-shou, and Zhang qing-hui |
hep-ph/9411428 | QCD sum rules and chiral logarithms | Standard QCD sum-rule analyses of the nucleon mass give results that are
inconsistent with chiral perturbation theory due to an overly simple continuum
ansatz on the phenomenological side of the sum rule. We show that a careful
treatment of the continuum, including $\pi$-$N$ states and other states with
virtual pions, ... | 1994-11-29 | 2009-10-28 | [
"hep-ph",
"nucl-th"
] | Su Houng Lee, Seungho Choe, Thomas D. Cohen, and David K. Griegel |
hep-ph/9411413 | Fermion mass hierarchies in low energy supergravity and superstring
models | We investigate the problem of the fermion mass hierarchy in supergravity
models with flat directions of the scalar potential associated with some gauge
singlet moduli fields. The low-energy Yukawa couplings are nontrivial
homogeneous functions of the moduli and a geometric constraint between them
plays, in a large clas... | 1994-11-28 | 2009-12-15 | [
"hep-ph"
] | P. Binetruy, E. Dudas |
hep-ph/9411411 | Fermions on the Electroweak String | We construct a simple class of exact solutions of the electroweak theory
including the naked $Z$--string and fermion fields. It consists in the
$Z$--string configuration ($\phi,Z_\theta$), the {\it time} and $z$ components
of the neutral gauge bosons ($Z_{0,3},A_{0,3}$) and a fermion condensate
(lepton or quark) zero m... | 1994-11-28 | 2009-10-28 | [
"hep-ph"
] | J.M. Moreno, D.H. Oaknin and M. Quir\'os |
hep-ph/9411409 | Induced Gluon Radiation in a QCD Medium | Soft gluon radiation induced by multiple scattering of a fast quark or gluon
propagating through QCD matter is discussed. After revisiting the
Landau-Pomeranchuk-Migdal effect in QED we show that large formation times of
bremsstrahlung quanta determine the QCD radiation intensity (in analogy to QED)
and derive the gluo... | 1994-11-28 | 2009-10-28 | [
"hep-ph"
] | R.Baier, Yu.L.Dokshitzer, S.Peign\'e, D.Schiff |
hep-ph/9411407 | Two-Doublet Higgs Structure at the Electroweak Energy Scale | The existence of supersymmetry above a few TeV and that of two Higgs doublets
at the electroweak energy scale do not necessarily result in the minimal
supersymmetric standard model (MSSM). An interesting counter example is given
with m_h < 2^{1/2} m_W + radiative corrections = 145 GeV instead of m_h < m_Z +
radiative c... | 1994-11-28 | 2007-05-23 | [
"hep-ph"
] | Ernest Ma (UC Riverside) |
hep-ph/9411417 | On Instanton Contributions to the tau Hadronic Width | Comparing the results of finite energy and Borel transformed sum rules for
the difference of vector and axial vector current correlators we evaluate the
instanton contributions to the $\tau$ hadronic width. In contrast to an
explicit theoretical calculation we find that the instanton contributions to
the $\tau$ hadroni... | 1994-11-28 | 2009-10-28 | [
"hep-ph"
] | V.Kartvelishvili and M.Margvelashvili |
hep-ph/9411412 | Momentum dependent quark mass in two-point correlators | A momentum dependent quark mass may be incorporated into a quark model in a
manner consistent with dynamically broken chiral symmetry. We use this to study
the high $Q^2$ behavior of the vector, axialvector, scalar and pseudoscalar
two-point correlation functions. Expanding the results to order $1/Q^6$, we
show the cor... | 1994-11-28 | 2009-10-28 | [
"hep-ph"
] | B. Holdom and Randy Lewis |
hep-ph/9411404 | Tests of the Parton Model for Inclusive Semileptonic B Decays with the
Heavy Quark Effective Theory | In order to study the end-point spectrum of inclusive semileptonic $b
\rightarrow u$ decays, we investigate the parton model motivated by deep
inelastic scattering process. The reliability of the model is carefully
examined by comparing the decay rates and the lepton spectra for $b \rightarrow
c$ decay with those of th... | 1994-11-28 | 2007-05-23 | [
"hep-ph"
] | Kang Young Lee, Yeong Gyun Kim and Jae Kwan Kim |
hep-ph/9411406 | The strong-CP question in SU(3)_c X SU(3)_L X U(1)_N models | We analyze two recent models based on the gauge group
SU(3)$_c\times$SU(3)$_L\times$U(1)$_N$ where each generation is not
anomaly-free, but anomaly cancels when three generations are taken into
account. We show that the most general Yukawa couplings of these models admit
of a Peccei-Quinn symmetry. This symmetry can be... | 1994-11-28 | 2010-11-01 | [
"hep-ph"
] | Palash B Pal (Indian Institute of Astrophysics) |
hep-ph/9411410 | Bubble Nucleation Rate In Fourth-Order Gravity | We calculate the bubble nucleation rate in a fourth-order gravity theory
whose action contains an $R^2$ term, under the thin-wall approximation, by two
different methods. First the bounce solution is found for the Euclidean version
of the original action. Next, we use a conformal transformation to transform
the theory ... | 1994-11-28 | 2009-10-28 | [
"hep-ph"
] | Yue Hu |
hep-ph/9411405 | Charged Higgs Effects on Exclusive Semi-tauonic $\bbox{B}$ Decays | We study effects of charged Higgs boson exchange in the $B$ semileptonic
decays $\bar B \rightarrow D^{(*)}\tau\bar\nu_\tau$. Both branching ratio and
$\tau$ polarization are examined. We use the recent experimental data on
semileptonic $B$ decays and the heavy quark effective theory in order to reduce
theoretical unce... | 1994-11-28 | 2009-10-28 | [
"hep-ph"
] | Minoru Tanaka |
hep-ph/9411408 | Left-Right Gauge Symmetry at the TeV Energy Scale | Two first examples beyond the standard model are given which exhibit
left-right symmetry (g_L = g_R) and supersymmetry at a few TeV, together with
gauge-coupling unification at around 10^{16} GeV. | 1994-11-28 | 2007-05-23 | [
"hep-ph"
] | Ernest Ma (UC Riverside) |
hep-ph/9411403 | Bounds on the Higgs Mass in the Standard Model and Minimal
Supersymmetric Standard Model | We present bounds on the Higgs mass in the Standard Model and in the Minimal
Supersymmetric Standard Model using the effective potential with
next-to-leading logarithms resummed by the renormalization group equations, and
physical (pole) masses for the top quark and Higgs boson. In the Standard Model
we obtain lower bo... | 1994-11-26 | 2007-05-23 | [
"hep-ph"
] | Mariano Quir\'os |
hep-ph/9411401 | Electroweak Flavor-Conserving Gauge Processes: Virtual Effects | Summary of electroweak Standard Model, including aspects of gauge summetry,
symmetry breaking, and quantum radiative corrections. Implications of precise
electroweak measurements for Standard Model and hypothetical non-Standard
states and interactions. Status of exact and approximate symmetries of the
Standard Model. T... | 1994-11-26 | 2008-02-03 | [
"hep-ph"
] | Dallas C. Kennedy (University of Florida) |
hep-ph/9411392 | Bounds on Scalar Leptoquarks from Z Physics | We analyse the constraints on scalar leptoquarks coming from radiative
corrections to $Z$ physics. We perform a global fitting to the LEP data
including the contributions of the most general effective Lagrangian for scalar
leptoquarks, which exhibits the $SU(2)_L \times U(1)_Y$ gauge invariance. We
show that the bounds... | 1994-11-25 | 2008-11-26 | [
"hep-ph"
] | J.K. Mizukoshi (IFUSP), O.J.P. Eboli (CERN), and M.C. Gonzalez-Garcia
(CERN) |
hep-ph/9411395 | Polarization in Top Quark Pair Production near Threshold | The polarization dependent momentum distributions of top quarks and their
decay products are calculated for $t\bar t$ production at future $e^+e^-$
colliders with polarized beams. The Green function formalism is applied to this
reaction near energy threshold. The Lippmann--Schwinger equations for the
$S$-wave and $P$-w... | 1994-11-25 | 2009-10-28 | [
"hep-ph"
] | R. Harlander, M. Je\.zabek, J.H. K\"uhn and T. Teubner |
hep-ph/9411394 | Four-Fermi Operators in $e^+$ $e^-$ Annihilation Experiments and
Uncertainties in $Z$ Boson Properties | We investigate the effects of possible new four-Fermi operators on $e^+$
$e^-$ annihilation experiments. They represent a class of new physics, which
has the potential to change the parameters of the $Z$ boson and at the same
time interferes with their determination from the data. We show that in the
presence of such o... | 1994-11-25 | 2010-01-15 | [
"hep-ph"
] | Jens Erler (Univ. of Pennsylvania) |
hep-ph/9411391 | Characteristics of QCD Phase Transitions in an Extended Skyrme Model on
$S^3$ | We study the characteristics of the QCD phase transitions in dense hadronic
matter using the Skyrme model constructed on S^3. We find numerically the
localized solutions on $S^3$ using the extended Skyrme model which implements
correctly the scale symmetry of QCD. The transition from the localized phase to
the delocali... | 1994-11-25 | 2009-09-25 | [
"hep-ph",
"nucl-th"
] | Joon Ha Kim, Sooman Yee and Hyun Kyu Lee |
hep-ph/9411393 | Chiral Effective Theory for Heavy Mesons | I review recent developments in the description of the interactions between
light and heavy mesons by an effective chiral lagrangian having the symmetries
of the Heavy Quark Effective Theory. In particular the problem of the
determination of the strong coupling constants $g_{P^* P \pi}$ and $g_{P^* P
\rho}$ ($P, P^*=$ ... | 1994-11-25 | 2007-05-23 | [
"hep-ph"
] | G. Nardulli |
hep-ph/9411396 | Overview of the Standard Model | A brief overview is presented of the standard model of electroweak
interactions, including precision tests, the role of the
Cabibbo-Kobayashi-Maskawa (CKM) matrix in describing CP violation, windows on
intermediate-scale physics, and the nature of the Higgs phenomenon. | 1994-11-25 | 2009-09-25 | [
"hep-ph"
] | Jonathan L. Rosner |
hep-ph/9411397 | Supersymmetric Models with a Gauge Singlet and Non-Universal Soft Terms
from Orbifold String Theory | The particle spectrum of the supersymmetric extension of the standard model
with a gauge singlet is studied. Soft supersymmetry breaking terms are
explicitly chosen to be non-universal according to orbifold string theory. they
depend on modular weights of chiral fields and on an angle $\theta$ specifying
the supersymme... | 1994-11-25 | 2008-11-26 | [
"hep-ph",
"hep-th"
] | Ph. Brax, U. Ellwanger and C.A. Savoy |
hep-ph/9411383 | Neutrino Oscillations from Discrete Non-Abelian Symmetries | I discuss a SUSY-GUT model with a non-Abelian discrete family symmetry that
explains the observed hierarchical pattern of quark and lepton masses. This
$SO(10) \times \Delta(75)$ model predicts modified quadratic seesaw neutrino
masses and mixing angles which are interesting for three reasons: i.) they
offer a solution... | 1994-11-24 | 2016-08-24 | [
"hep-ph"
] | Martin Schmaltz |
hep-ph/9411389 | CP and CPT measurements at DAFNE | Starting from the time evolution of the C-odd $\bar{K}^0 K^0$ system, we
analyze the asymmetries measurable at DAFNE and their implications on CP
violation and on the possible tests of T and CPT symmetries. In particular the
ratio $\epsilon'/\epsilon$ can be measured with high precision (up to about
$10^{-4}$ for the r... | 1994-11-24 | 2008-02-03 | [
"hep-ph"
] | G. D'Ambrosio, G. Isidori and A. Pugliese |
hep-ph/9411388 | Constraints on the electroweak universal parameters and the top and
Higgs masses from updated LEP/SLC data | A global analysis is performed using the latest data from LEP and SLC.
Constraints on the electroweak universal parameters ($S,T,U$) and on the masses
of the top quark and Higgs boson within the Standard Model (SM) are
investigated. The uncertainties due to the QCD and QED effective couplings,
$\alpha_s(\mz)$ and $\bar... | 1994-11-24 | 2008-11-26 | [
"hep-ph"
] | Seiji Matsumoto |
hep-ph/9411384 | Hadronization | Hadronization corrections to the predictions of perturbative QCD are
reviewed. The existing models for the conversion of quarks and gluons into
hadrons are summarized. The most successful models give a good description of
the data on $e^+e^-$ event shapes and jet fragmentation functions, and suggest
that the dominant h... | 1994-11-24 | 2008-02-03 | [
"hep-ph"
] | Bryan Webber |
hep-ph/9411386 | A Note on the QCD Corrections to Forward--Backward Asymmetries of
Heavy--Quark Jets in Z Decays | The measurement of the forward-backward asymmetries of heavy quarks provides
one of the most precise determinations of $\sin^2\theta_W$ in $Z$ decays. We
discuss in detail the one--loop QCD radiative corrections to these asymmetries.
Results are given for single heavy--quark jet asymmetries and asymmetries of
the thrus... | 1994-11-24 | 2010-11-01 | [
"hep-ph"
] | A. Djouadi, B. Lampe and P. M. Zerwas |
hep-ph/9411387 | Biased discrete symmetry and domain wall problem | We reconsider a cosmological evolution of domain walls produced by
spontaneous breaking of an approxime discrete symmetry. We show, that domain
walls may never collapse even if the standard bound on the vacuum energy
asymmetry is satisfied. Instead of disappearing, these defects may form stable
``bound states'' - doubl... | 1994-11-24 | 2009-10-28 | [
"hep-ph"
] | G.Dvali, Z.Tavartkiladze and J.Nanobashvili |
hep-ph/9411402 | Meson Correlators in QCD Vacuum - is Saturation the Right Approach ? | Equal time, point to point correlation functions for spatially separated
meson currents are calculated with respect to a variational construct for the
ground state of QCD. With exact calculations, vector, axial vector and scalar
channels show qualitative agreement with the phenomenological predictions,
where as pseudos... | 1994-11-24 | 2007-05-23 | [
"hep-ph",
"hep-th"
] | Varun Sheel, Hiranmaya Mishra and Jitendra C. Parikh |
hep-ph/9411385 | Testing the Standard Model of CP Violation in the B System | We review the subject of CP violation in the $B$ meson system within the
Standard Model of CP violation, which is based on a complex phase in the
Cabibbo-Kobayashi-Maskawa (CKM) matrix. Three kinds of CP nonconservation are
studied: In $B^0-\Bbar$ mixing, in mixed neutral $B$ decays to states which are
common decay pro... | 1994-11-24 | 2007-05-23 | [
"hep-ph"
] | Michael Gronau |
hep-ph/9411380 | Dynamics of Cosmological Phase Transitions: What Can We Learn from
Condensed Matter Physics? | A brief outline is given of the description of phase transition kinetics in
condensed matter systems with a continuous symmetry, emphasising the roles of
dissipation, coarse-graining and scaling. The possible relevance of these ideas
to the early universe is explored in the contexts of the GUT string transition
and the... | 1994-11-24 | 2007-05-23 | [
"hep-ph",
"gr-qc"
] | Nigel Goldenfeld (University of Illinois at Urbana-Champaign) |
hep-ph/9411390 | A novel left-right symmetric model | A novel gauge model which has a spontaneously broken parity symmetry is
constructed. The model has only 2 parameters beyond those of the standard
model. Some of the unusual implications of the model are discussed. | 1994-11-24 | 2007-05-23 | [
"hep-ph"
] | R. Foot and H. Lew |
hep-ph/9411379 | The Spectrum of the O(g^4) scale-invariant Lipatov Kernel | The scale-invariant $O(g^4)$ Lipatov kernel has been determined by t-channel
unitarity. The forward kernel responsible for parton evolution is evaluated and
its eigenvalue spectrum determined. In addition to a logarithmic modification
of the $O(g^2)$ kernel a distinct new kinematic component appears. This
component is ... | 1994-11-24 | 2009-10-28 | [
"hep-ph",
"hep-th"
] | Claudio Coriano' and Alan R. White (Argonne) |
hep-ph/9411375 | Zero Modes on Linked Strings | We study linked loops of string in the presence of bosonic condensates and
fermionic zero modes on the strings. We find that the strings necessarily carry
a current if the bosons have an Aharanov-Bohm interaction with the string. The
fermionic case is analyzed in the context of the standard model where there are
lepton... | 1994-11-23 | 2009-10-28 | [
"hep-ph",
"gr-qc",
"hep-th"
] | Jaume Garriga and Tanmay Vachaspati |
hep-ph/9411362 | Scale-Invariant Lipatov Kernels from t-Channel Unitarity | The Lipatov equation can regarded as a reggeon Bethe-Salpeter equation in
which higher-order reggeon interactions give higher-order kernels. Infra-red
singular contributions in a general kernel are produced by t-channel nonsense
states and the allowed kinematic forms are determined by unitarity. Ward
identity and infra... | 1994-11-23 | 2008-02-03 | [
"hep-ph"
] | C. Coriano' and A. R. White |
hep-ph/9411368 | Exclusive vector meson production at HERA | Exclusive vector meson production from real and virtual photons is, for the
most part, described well by soft pomeron exchange. However, there are some
unsolved normalisation problems, and just a hint that an additional
contribution from hard pomeron exchange may be needed. | 1994-11-23 | 2009-10-28 | [
"hep-ph"
] | A Donnachie and P V Landshoff |
hep-ph/9411373 | A Model Independent Approach to Solar Neutrino Experiments | In the first part of this report we present the results of a model
independent analysis of the existing solar neutrino data. We obtained forbidden
regions in the plane of the parameters Delta m^2 and sin^2 2 theta in two
cases: A) Without any restrictions on the values of the solar neutrino fluxes
from different reacti... | 1994-11-23 | 2008-02-03 | [
"hep-ph",
"astro-ph"
] | S.M. Bilenky and C. Giunti |
hep-ph/9411369 | Higgs search in e+e- and gamma-gamma colliders | The prospects for discovering Higgs particles and studying their fundamental
properties at future high--energy electron--positron and photon-photon
colliders are reviewed. Both the Standard Model Higgs boson and the Higgs
particles of its minimal supersymmetric extension are discussed. We also
comment on a two Higgs do... | 1994-11-23 | 2009-09-25 | [
"hep-ph"
] | Jan Kalinowski |
hep-ph/9411371 | Polarization in Top Quark Production and Decay near Threshold | Theoretical results are presented for top quarks produced in annihilation of
polarized electrons on positrons. Polarization studies for $t\bar t$ pairs near
threshold are free from hadronization ambiguities. This is due to the short
lifetime of the top quark. Semileptonic decays are discussed as well as their
applicati... | 1994-11-23 | 2009-10-28 | [
"hep-ph"
] | R. Harlander, M. Je\.zabek, J.H. K\"uhn and T. Teubner |
hep-ph/9411377 | A determination of the QED coupling at the $Z$ pole | We critically examine the evaluation of the hadronic contribution to the
running of the QED coupling, $\alpha$, from $Q^2=0$ to $Q^2=M_Z^2$. Using data
for $e^+e^-\to{}$hadrons we find that $\alpha(M_Z^2)^{-1} = 128.99\pm 0.06$, as
compared to the existing value of $128.87\pm 0.12$. | 1994-11-23 | 2009-10-28 | [
"hep-ph"
] | A.D. Martin and D. Zeppenfeld |
hep-ph/9411366 | Baryogenesis from a Lepton Asymmetric Universe | We demonstrate that $CP-$violation in the Majorana mass matrices of the heavy
neutrinos can generate a $CP-$asymmetric universe. The subsequent decay of the
Majorana particles generates a lepton number asymmetry. During the electroweak
phase transition the lepton asymmetry is converted into a baryon asymmetry,
which su... | 1994-11-23 | 2010-11-01 | [
"hep-ph"
] | Marion Flanz, Emmanuel A. Paschos and Utpal Sarkar |
hep-ph/9411398 | CP violation at colliders | The prospects of experimental detection of $CP$ violation at $e^+e^-$ and
$pp/p\overline{p}$ colliders are reviewed. After a general discussion on the
quantities which can measure $CP$ violation and on the implications of the
$CPT$ theorem, various possibilities of measuring $CP$ violation arising
outside the standard ... | 1994-11-23 | 2010-11-01 | [
"hep-ph"
] | Saurabh D. Rindani |
hep-ph/9411367 | Pure Leptonic Radiative Decays $B^\pm, D_s\to\ell\nu\gamma$ and the
Annihilation Graph | Pure leptonic radiative decays of heavy-light mesons are calculated using a
very simple non-relativistic model. Dominant contribution originates from
photon emission from light initial quark. We find
$BR(B^\pm\to\ell\nu\gamma)\sim3.5\times10^{-6}$ and $BR(D_s\to
\ell\nu\gamma)\sim1.7 \times10^{-4}$. The importance of t... | 1994-11-23 | 2015-06-25 | [
"hep-ph"
] | D. Atwood, G. Eilam, A. Soni |
hep-ph/9411365 | Color-Octet Fragmentation and the psi' Surplus at the Tevatron | The production rate of prompt $\psi'$'s at large transverse momentum at the
Tevatron is larger than theoretical expectations by about a factor of 30. As a
solution to this puzzle, we suggest that the dominant $\psi'$ production
mechanism is the fragmentation of a gluon into a $c \bar c$ pair in a pointlike
color-octet ... | 1994-11-23 | 2016-08-24 | [
"hep-ph"
] | Eric Braaten and Sean Fleming |
hep-ph/9411364 | Kaon Condensation in Dense Stellar Matter | This talk is based on work done in collaboration with G.E. Brown and D.-P.
Min on kaon condensation in dense baryonic medium treated in chiral
perturbation theory using heavy-baryon formalism. It contains, in addition to
what was recently published, some new results based on the analysis on kaonic
atoms by Friedman, Ga... | 1994-11-23 | 2007-05-23 | [
"hep-ph",
"nucl-th"
] | Chang-Hwan Lee and Mannque Rho |
hep-ph/9411376 | On the Nikolaev-Zakharov-Zoller form for the BFKL pomeron | The equation proposed by N.N.Nikolaev, B.G.Zakharov and V.R.Zoller for the
colour dipole cross-section is compared with the BFKL equation for the hard
pomeron for the $SU(2)$ colour group. It is demonstrated that for a fixed
coupling constant the difference between the two equations is due to a
different manner to intr... | 1994-11-23 | 2007-05-23 | [
"hep-ph"
] | M. A. Braun |
hep-ph/9411370 | Combining Vector-- and Heavy Quark Symmetry | Assuming that the chiral symmetry of the light degrees of freedom is realized
as the vector symmetry proposed by Georgi, we write down a chiral Lagrangian
for heavy mesons which incorporates both heavy quark and vector symmetry. Some
of the phenomenological implications of this idea are considered. | 1994-11-23 | 2009-10-28 | [
"hep-ph"
] | Thorsten Feldmann and Thomas Mannel |
hep-ph/9411382 | Pionium in the elementary particle decays | Some atomic decays of elementary particles with pionium
($\pi^+\pi^-$-dimesoatom) in the final state are considered. Only for K-meson
atomic decays are the corresponding branching ratios big enough to make their
experimental study realistic. The $O(\alpha)$ order corrections to the lifetime
of pionium are also calculat... | 1994-11-23 | 2011-07-19 | [
"hep-ph"
] | Z.K. Silagadze |
hep-ph/9411378 | Unification and low-energy supersymmetry at one and two-loop orders | The status of coupling constant unification -- assuming the validity of the
standard model or of its minimal supersymmetric extension at high energies --
and of relations between various Yukawa couplings (assuming the supersymmetri
extension) which are implied in certain grand-unified theories, are studied in
detail. T... | 1994-11-23 | 2007-05-23 | [
"hep-ph"
] | Nir Polonsky |
hep-ph/9411381 | SO(8) Colour as possible origin of generations | A possible connection between the existence of three quark-lepton generations
and the triality property of SO(8) group (the equality between 8-dimensional
vectors and spinors) is investigated. | 1994-11-23 | 2010-11-01 | [
"hep-ph"
] | Z.K. Silagadze |
hep-ph/9411374 | Rare $K$ Decays | The rare decays of the $K$ meson have had a long tradition as a laboratory
for testing the symmetry properties of the weak interactions, and the manner in
which these symmetries are broken by higher order effects. Present--day
interest is focussed on decays that are suppressed by $CP$--symmetry or GIM
symmetry. Such de... | 1994-11-23 | 2010-11-01 | [
"hep-ph"
] | L.M. Sehgal |
hep-ph/9411400 | Baryogenesis at the Electroweak Scale | The generation of the baryon asymmetry of the universe is considered in the
standard model of the electroweak theory with simple extensions of the Higgs
sector. The propagation of quarks of masses up to about 5 GeV are considered,
taking into account their markedly different dispersion relations due to
propagation thro... | 1994-11-23 | 2010-11-01 | [
"hep-ph"
] | A. Kundu and S. Mallik |
hep-ph/9411372 | Inelastic J/psi Photoproduction | Inelastic photoproduction of $J/\psi$ particles at high energies is one of
the processes to determine the gluon distribution in the nucleon. We have
calculated the QCD radiative corrections to the color-singlet model of this
reaction. They are large at moderate photon energies, but decrease with
increasing energies. Th... | 1994-11-23 | 2009-10-28 | [
"hep-ph"
] | M. Kraemer, J. Zunft, J. Steegborn, and P. M. Zerwas |
hep-ph/9411399 | Measurement of the $\tau$ electric dipole moment using longitudinal
polarization of $e^+e^-$ beams | Certain CP-odd momentum correlations in the production and subsequent decay
of $\tau$ pairs in $e^+ e^-$ collisions are enhanced significantly when the
$e^+$ and $e^-$ beams are longitudinally polarized. These may be used to probe
the real and imaginary parts of $d_\tau^\gamma$, the electric dipole moment of
the $\tau$... | 1994-11-23 | 2009-12-30 | [
"hep-ph"
] | B. Ananthanarayan and Saurabh D. Rindani |
hep-ph/9411355 | Is there a Vector Boson Coupling to Baryon Number? | Discrepancies in measurements of the QCD running coupling constant are
consistent with a new vector gauge boson coupling to baryon number with
strength aB~0.1. Upsilon decays constrain such a boson to have a mass greater
than about 35 GeV. It is difficult to observe such a boson in Z decays, e+e-
annihilation, or hadro... | 1994-11-22 | 2009-10-28 | [
"hep-ph"
] | David Bailey (Toronto), Sacha Davidson (Berkeley) |
hep-ph/9411358 | Pion and thermal photon spectra as a possible signal for a phase
transition | We calculate thermal photon and neutral pion spectra in ultrarelativistic
heavy-ion collisions in the framework of three-fluid hydrodynamics. Both
spectra are quite sensitive to the equation of state used. In particular,
within our model, recent data for $S+Au$ at $200$ AGeV can only be understood
if a scenario with a ... | 1994-11-22 | 2009-09-25 | [
"hep-ph"
] | A. Dumitru, U. Katscher, J.A. Maruhn, H. St\"ocker, W. Greiner, D.H.
Rischke |
hep-ph/9411360 | Supersymmetric Magnetic Moments Sum Rules and Spontaneous Supersymmetry
Breaking | In supersymmetry the anomalous magnetic moment of particles belonging to the
same supermultiplet is related by simple sum rules. We study the modification
of these sum rules in the case of spontaneously broken N=1 global
supersymmetry. | 1994-11-22 | 2009-10-28 | [
"hep-ph"
] | S.S.Khalil |
hep-ph/9411363 | On the QCD corrections to $\Delta\rho$ | We discuss some recent developments in the evaluation of the QCD corrections
to $\Delta\rho$, their interpretation, an estimate of the theoretical error,
and its effect on electroweak physics. | 1994-11-22 | 2007-05-23 | [
"hep-ph"
] | Alberto Sirlin |
hep-ph/9411356 | The Lamb Shift of Hydrogen and Low-Energy Tests of QED | Leading logarithmic corrections to the difference of Lamb shifts of s-states
$E_L(1s)-8E_L(2s)$ and to the life time of $2p_{1/2}$ state are considered. The
result of Sokolov and Yakovlev for the Lamb splitting of $2s_{1/2}$ and
$2p_{1/2}$ is re-evaluated and our new value is 1057.8576(21) MHz. Using value
of $E_L(1s)-... | 1994-11-22 | 2007-05-23 | [
"hep-ph"
] | Savely G. Karshenboim, D. I. Mendeleev (Institute for Metrology
(VNIIM), St. Petersburg, Russia) |
hep-ph/9411359 | Aspects of four-jet production in polarized proton-proton collisions | We examine the intrinsic spin-dependence of the dominant $gg \rightarrow
gggg$ subprocess contribution to four-jet production in polarized proton-proton
collisions using helicity amplitude techniques. We find that the partonic
level, longitudinal spin-spin asymmetry, $\hat{a}_{LL}$, is intrinsically large
in the kinema... | 1994-11-22 | 2009-10-28 | [
"hep-ph"
] | S. P. Fraser, S. T. Fraser, and R. W. Robinett |
hep-ph/9411361 | Jet Physics at LEP and SLC | Experimental results on jet physics at LEP and SLC are reviewed and compared
with perturbative QCD predictions. The discussion includes determinations of
the strong coupling $\as$, measurements of event shape distributions and jet
cross sections, studies of subjet multiplicities and tests of QCD coherence. | 1994-11-22 | 2007-05-23 | [
"hep-ph"
] | Stefano Catani (INFN Firenze) |
hep-ph/9411357 | Predictions of the Top mass in Mininal Supersymmetric Left-Right Model | The one-loop evolution of Yukawa couplings in the minimal supersymmetric
left-right model (MSUSYLR) model with a wide variation of the right handed
breaking scale $M_R$ from 1 TeV to $10^{18}$ GeV is studied assuming that all
third generation Yukawa couplings are equal and in the fixed point domain of
the top quark Yua... | 1994-11-22 | 2010-01-06 | [
"hep-ph"
] | Biswajoy Brahmachari |
hep-ph/9411352 | Geometry of Multihadron Production | Summary talk given at the 24th International Symposium on Multiparticle
Dynamics, Italy, September 1994 -- This summary talk only reviews a small
sample of topics featured at this symposium: 1. Introduction 2. The Geometry
and Geography of Phase space 3. Space-Time Geometry and HBT 4. Multiplicities,
Intermittency, Cor... | 1994-11-21 | 2007-05-23 | [
"hep-ph"
] | James D. Bjorken |
hep-ph/9411348 | Electroweak Strings, Zero Modes and Baryon Number | The Dirac equations for leptons and quarks in the background of an
electroweak $Z-$string have zero mode solutions. If two loops of electroweak
string are linked, the zero modes on one of the loops interacts with the other
loop via an Aharanov-Bohm interaction. The effects of this interaction are
briefly discussed and ... | 1994-11-21 | 2009-10-28 | [
"hep-ph"
] | Tanmay Vachaspati |
hep-ph/9411351 | Critical Scattering at the Chiral Phase Transition and low-p_t
enhancement of mesons in ultra-relativistic heavy-ion collisions | The enhancement of pions and kaons observed at small transverse momenta in
ultra-relativistic heavy-ion collisions may at least partly reflect critical
scattering expected to occur in the neighborhood of a second order phase
transition. Kinetic equations in the relaxation time approximation are proposed
for the time ev... | 1994-11-21 | 2009-10-28 | [
"hep-ph"
] | Jiri Dolejsi, Wojciech Florkowski, Joerg Huefner |
hep-ph/9411349 | On the charge dependence of factorial moments in $e^+e^-$ processes | The behaviour of like-charge and unlike-charge second factorial moments in
$e^+e^-$ reactions is discussed. It is argued that Monte Carlo calculation with
the help of generators JETSET 7.4 and HERWIG 5.8 points to the conclusion that
the only nontrivial cause of intermittency are Bose-Einstein correlations of
identical... | 1994-11-21 | 2008-02-03 | [
"hep-ph"
] | J. Rame\v{s} |
hep-ph/9411353 | Reevaluation of the Hadronic Contribution to $\alpha(M_Z^2)$ (revised) | We reevaluate the hadronic part of the electromagnetic vacuum expectation
value using the standard dispersion integral approach that utilizes the
hadronic cross section measured in $\ee$ experiments as input. Previous
analyses are based upon point-by-point trapezoidal integration which has the
effect of weighting all i... | 1994-11-21 | 2009-10-28 | [
"hep-ph"
] | Morris L. Swartz |
hep-ph/9411347 | Light Neutralinos in B-Decays | We consider the decays of a $B_s$-meson into a pair of lightest
supersymmetric particles (LSP) in the minimal supersymmetric standard model. It
is found that the parameter space for light LSP's in the range of 1 GeV can be
appreciably constrained by looking for such decays. | 1994-11-21 | 2009-10-28 | [
"hep-ph"
] | Rathin ADhikari and Biswarup Mukhopadhyaya |
hep-ph/9411354 | A Property of Recombination in Polarized Hadronic Targets | The triple gluon-ladder vertex is shown to project the outgoing gluon in
either polarization state with equal probability up to the leading
double-ln(x)ln($Q^2$) approximation. This implies that the $Q^2$-evolution of
$\Delta G (x, Q^2)$ is free from recombination effects to this level of
approximation. | 1994-11-21 | 2009-10-28 | [
"hep-ph"
] | Arjun Berera |
hep-ph/9411344 | The simplest form of the $\kappa$ and $\kappa^2$ order graviton
self-interaction Lagrangian density in the weak field approximation | We derive the simplest form of the $\kappa(\kappa^2)$ order graviton
self-interaction Lagrangian density $\lag{1}(\lag{2})$ in the weak field
approximation. With the divergenceless condition, de Donder gauge and some
combinatoric techniques, we derive the mathematically independent basis
expressions for $\lag{1}(\lag{2... | 1994-11-21 | 2008-02-03 | [
"hep-ph"
] | Jungil Lee, J. S. Shim, and H. S. Song |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.