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/9307278 | Dynamical zeros in neutrino-electron elastic scattering at leading order | We show the existence of dynamical zeros in the helicity amplitudes for
neutrino-electron elastic scattering at lowest order in the standard theory. In
particular, the $\lambda=1/2$ non-flip electron helicity amplitude in the
electron antineutrino process vanishes for an incident neutrino energy
$E_{\nu}=m_{e}/(4sin^{2... | 1993-07-16 | 2016-08-14 | [
"hep-ph"
] | J. Segura, J. Bernab\'eu, F.J. Botella and J. Pe\~narrocha |
hep-ph/9307282 | Radiative Corrections to $W$ Pair Production at High Energies | Radiative Corrections to $W$ Pair Production and effects of finite width of
the $W$ bosons are studied using the Monte Carlo {\tt WOPPER}. As an example
the influence of QED radiative corrections on the reconstruction of the $W$
helicities at LEP 200 and a future 500 GeV $e^+ e^-$ collider is discussed. | 1993-07-16 | 2007-05-23 | [
"hep-ph"
] | H. Anlauf, H. Dahmen, A. Himmler, P. Manakos and T. Mannel |
hep-ph/9307280 | Probing Form Factors in Top Quark Pair Production at $e^-e^+$ Colliders | We describe how to probe new physics through large CP violation effects and
non--standard Z-t-t couplings via the scattering process e^-e^+ -> t tbar.
[Talk presented at the Workshop on Physics and Experiments with Linear $e^+e^-$
Colliders, Waikoloa, Hawaii, 26-30 April 1993.] | 1993-07-15 | 2007-05-23 | [
"hep-ph"
] | G. A. Ladinsky and C.--P. Yuan |
hep-ph/9307279 | Baryogenesis via lepton number violating scalar interactions | We study baryogenesis through lepton number violation in left-right symmetric
models. In these models the lepton number and CP violating interactions of the
triplet higgs scalars can give rise to lepton number asymmetry through
non-equilibrium decays of the $SU(2)_L$ triplet higgs and the right handed
neutrinos. This i... | 1993-07-15 | 2010-11-01 | [
"hep-ph"
] | Patrick J. O'Donnell and Utpal Sarkar |
hep-ph/9307277 | Introduction to Thermal Field Theory | This is intended to be a very basic introduction and short (and of course
incomplete) overview of thermal field theory. In the first part, I introduce
the thermal propagator at a very simple level and give the Feynman rules using
the time-path contour method. In the second part, I give examples of these
rules in scalar... | 1993-07-15 | 2015-06-25 | [
"hep-ph"
] | T. Altherr |
hep-ph/9307281 | Signals of New Leptons | We discuss the production of heavy leptons at a future high--energy $e^+e^-$
linear collider with a center of mass energy of 500 GeV. Signals and
backgrounds are analyzed for their single production in association with
ordinary leptons. [Talk given by A.D. at the second Workshop on "Physics and
Experiments with Linear ... | 1993-07-15 | 2007-05-23 | [
"hep-ph"
] | G. Azuelos and A. Djouadi |
hep-ph/9307275 | $SO(10)$ Operator Analysis For $\nu_\mu \nu_\tau$ Oscillations | In grand unified theories the flavor mixing angles of leptons are related to
those of quarks. In this paper we study SO(10) theories with a precise group
theoretic relation at the GUT scale for mixing between the heaviest two
generations: $\thetuto = \kappa \abs{\vcbo}$. A comprehensive operator search
yields all possi... | 1993-07-15 | 2009-10-22 | [
"hep-ph"
] | H.-C. Cheng, M.S. Gill, and L.J. Hall |
hep-ph/9307276 | Automatic Gauged R-Parity | In the minimal supersymmetric standard model, the existence of R-parity is
not required for the internal consistency of the theory and might therefore be
regarded as ad hoc. I catalog some simple conditions which are sufficient to
guarantee that R-parity survives as an unbroken gauged discrete subgroup of the
continuou... | 1993-07-15 | 2007-05-23 | [
"hep-ph"
] | Stephen P. Martin |
hep-ph/9307269 | Tau Kinematics from Impact Parameters | The momenta of $\tau$ decay products in the reaction $e^+e^-\to\tau^+\tau^-$
do not constrain the $\tau$ direction unambiguously. It is shown how the
measurement of tracks of hadrons from semileptonic $\tau$ decays, in particular
their relative impact parameters, allows to resolve this ambiguity. | 1993-07-14 | 2009-10-22 | [
"hep-ph"
] | J.H. K\"uhn |
hep-ph/9307272 | Constraints on discrete symmetries from anomaly cancellation in
compactified superstring theories | Compactified string theories give rise to discrete symmetries which are
essential if they are to provide a realistic low energy theory. We find that in
a class of four dimensional string theories these symmetries are constrained by
similar conditions to those discrete anomaly cancellation conditions found in
the case t... | 1993-07-14 | 2010-11-01 | [
"hep-ph",
"hep-th"
] | Graham G. Ross, Christoph M.A. Scheich |
hep-ph/9307274 | Equations of Motion for Effective Lagrangians and Penguins in Rare
B-Decays | We study the application of the classical equations of motion (EOM) within
the framework of an effective low-energy Lagrangian treated at the loop level.
Gauge-fixing and ghost terms, which enter naturally in the EOM, are found to
lead to no physical effects --- neither through operator mixing nor in matrix
elements. B... | 1993-07-14 | 2009-10-22 | [
"hep-ph"
] | H. Simma |
hep-ph/9307271 | Rates and Distributions in Tau Decay | Semileptonic decays of polarised $\tau$ leptons are investigated. Predictions
for the rate, based on CVC and chiral Lagrangians, are contrasted with
experiments. Predictions for the angular distributions of three meson final
states are given. Emphasis is put on studies in electron-positron annihilation
where the neutri... | 1993-07-14 | 2007-05-23 | [
"hep-ph"
] | J.H. K\"uhn |
hep-ph/9307270 | Topics in Top Quark Physics | The status of top quark searches will be briefly reviewed. Theoretical
predictions for the top quark decay rate are presented including QCD and
electroweak radiative corrections. The possibilities for quarkonium searches at
an hadron collider will be discussed. The perspectives for top production at an
electron positro... | 1993-07-14 | 2007-05-23 | [
"hep-ph"
] | J.H. K\"uhn |
hep-ph/9307267 | Review of constraints on fermion mixing | The constraints on the mixing angles of the standard fermions with new heavy
particles that can appear in many extensions of the electroweak theory are
reviewed. Some emphasis is put in distinguishing the effects of a mixing with
new states which transform in a non-canonical way with respect to $SU(2)\times
U(1)$ (left... | 1993-07-14 | 2007-05-23 | [
"hep-ph"
] | Enrico Nardi |
hep-ph/9307273 | More about discrete symmetries in compactified string theories | We discuss discrete symmetries in several string compactification schemes.
The same constraints on the light spectra as for Gepner models \cite{rosss} are
found in various cases for non-$R$ symmetries. The analogous constraints for
$R$ symmetries are also established.Therefore it seems natural to conjecture
that they a... | 1993-07-14 | 2010-11-01 | [
"hep-ph",
"hep-th"
] | Christoph M.A. Scheich |
hep-ph/9307268 | Finite Temperature Effective Potential for the Abelian Higgs Model to
the Order $e^4,\lambda^2$ | A complete calculation of the finite temperature effective potential for the
abelian Higgs model to the order $e^4,\lambda^2$ is presented and the result is
expressed in terms of physical parameters defined at zero temperature. The
absence of a linear term is verified explicitly to the given order and proven
to survive... | 1993-07-14 | 2009-10-22 | [
"hep-ph"
] | Arthur Hebecker |
hep-ph/9307266 | Optimization of R(e+e-) and "Freezing" of the QCD Couplant at Low
Energies | The new result for the third-order QCD corrections to R_{e^+e^-}, unlike the
old, incorrect result, is nicely compatible with the
principle-of-minimal-sensitivity optimization method. Moreover, it leads to
infrared fixed-point behaviour: the optimized couplant, alpha_s/pi, for R(e+e-)
does not diverge at low energies, ... | 1993-07-13 | 2009-10-22 | [
"hep-ph"
] | A. C. Mattingly and P. M. Stevenson |
hep-ph/9307265 | Flavor changing neutral currents in $SU(3)\otimes U(1)$ models | We consider flavor changing neutral current effects coming from the $Z'$
exchange in 3-3-1 models. We show that the mass of this extra neutral vector
boson may be less than 2 TeV and discuss the problem of quark family
discrimination. | 1993-07-13 | 2009-10-22 | [
"hep-ph"
] | D. Dumm, F. Pisano and V. Pleitez |
hep-ph/9307259 | The $W$ Boson Loop Background to H -> ZZ at Photon-photon Colliders | We have performed a complete one-loop calculation of $\gamma \gamma
\rightarrow ZZ$ in the Standard Model, including both gauge bosons and fermions
in the loop. We confirm the large irreducible continuum background from the
$W$-boson loop found by Jikia. We have included the photon-photon luminosity,
and find that the ... | 1993-07-13 | 2009-10-22 | [
"hep-ph"
] | M. S. Berger |
hep-ph/9307257 | Polarization Effects in Scalar Lepton Production at High Energy
$\gamma\gamma$ Colliders | We investigate the charged scalar lepton production processes
$\gamma\gamma\to{\widetilde{\ell}}^{+}{\widetilde{\ell}}^{-}$ at high energy
$\gamma\gamma$ colliders in the framework of the minimal supersymmetric
standard model (MSSM). Here the high energy $\gamma$ beams are obtained by the
backward Compton scattering of... | 1993-07-13 | 2009-10-22 | [
"hep-ph"
] | Tadashi Kon |
hep-ph/9307263 | Anatomy of a Weak Matrix Element | Although the weak nonleptonic amplitudes of the Standard Model are
notoriously difficult to calculate, we have produced a modified weak matrix
element which can be analyzed using reliable methods. This hypothetical
nonleptonic matrix element is expressible in terms of the isovector vector and
axialvector spectral funct... | 1993-07-13 | 2009-10-22 | [
"hep-ph"
] | John F. Donoghue and Eugene Golowich |
hep-ph/9307260 | Quark Model Form Factors for Heavy Quark Effective Theory | We show how both the spectroscopy of heavy-light hadrons and the slope of the
Isgur-Wise function can be simultaneously fitted when Heavy Quark Effective
Theory is matched onto dynamical quark models, including careful treatment of
wigner rotations. Working consistently to order $\vec{v}^2$ and using the
parameters fro... | 1993-07-13 | 2009-10-22 | [
"hep-ph"
] | F.E. Close and A. Wambach |
hep-ph/9307261 | Unquenching the Rho Meson | Two-pion induced self-energy contributions to the $\rho$-meson mass are
examined in relation to the quenched approximation of QCD, where the physics
associated with two-pion intermediate states has been excluded from
vector-isovector correlation functions. Corrections to quenched QCD
calculations of the $\rho$-meson ma... | 1993-07-13 | 2009-10-22 | [
"hep-ph",
"hep-lat"
] | Derek B. Leinweber and Thomas D. Cohen |
hep-ph/9307264 | Isospin Multiplet Structure in Ultra--Heavy Fermion Bound States | The coupled Bethe--Salpeter bound state equations for a $Q\bar Q$ system,
where $Q=(U,D)$ is a degenerate, fourth generation, super--heavy quark doublet,
are solved in several ladder approximation models. The exchanges of gluon,
Higgs and Goldstone modes in the standard model are calculated in the
ultra--heavy quark li... | 1993-07-13 | 2010-11-01 | [
"hep-ph"
] | Pankaj Jain, Alan J. Sommerer, Douglas W. McKay, J.R. Spence, J.P.
Vary and Bing--Lin Young |
hep-ph/9307262 | Chiral Sum Rules and Their Phenomenology | We present an analysis of four sum rules, each based on chiral symmetry and
containing the difference $\rho_{\rm V}(s) - \rho_{\rm A}(s)$ of isovector
vector and axialvector spectral functions. Experimental data from tau lepton
decay and electron-positron scattering identify the spectral functions over a
limited kinema... | 1993-07-13 | 2009-10-22 | [
"hep-ph"
] | John F. Donoghue and Eugene Golowich |
hep-ph/9307258 | Casimir Effect of Strongly Interacting Scalar Fields | Non-trivial $\phi ^{4}$-theory is studied in a renormalisation group
invariant approach inside a box consisting of rectangular plates and where the
scalar modes satisfy periodic boundary conditions at the plates. It is found
that the Casimir energy exponentially approaches the infinite volume limit, the
decay rate give... | 1993-07-13 | 2009-10-22 | [
"hep-ph",
"cond-mat",
"hep-lat",
"hep-th"
] | K. Langfeld, F. Schm"user, H. Reinhardt |
hep-ph/9307256 | Single $W$-Boson Production in $e\gamma$ Collisions | We studied single $W$ boson production in high energy $e\gamma$ collisions
and the sensitivity of various observables to the $WW\gamma$ vertex. We
included gauge boson decay to final state fermions and all contributions to the
same final state. The contributions of the non-resonant diagrams and their
interference with ... | 1993-07-13 | 2007-05-23 | [
"hep-ph"
] | Stephen Godfrey and K. Andrew Peterson |
hep-ph/9307253 | Thermal Fluctuations at Second Order Phase Transitions | We construct a new coarse-grained effective potential which enables us to
estimate the probabilities of thermal fluctuations above an arbitrary threshold
at different length scales. | 1993-07-12 | 2009-10-22 | [
"hep-ph"
] | Mark Hindmarsh and R.J. Rivers |
hep-ph/9307248 | Unitarization of Structure Functions at Large ${\bf 1/x}$ | We discuss the effects of the $s$-channel unitarization on the $x$ and
$Q^{2}$ dependence of structure functions. The unitarization is implemented at
the level of photoabsorption cross sections by resorting to the light--cone
wave functions of virtual photons and to the diagonalization property of the
scattering matrix... | 1993-07-12 | 2009-10-22 | [
"hep-ph"
] | V. Barone, M. Genovese, N.N. Nikolaev, E. Predazzi and B.G. Zakharov |
hep-ph/9307254 | Three lepton decay modes of the proton | We consider the three lepton decay modes of the proton within the proton
decay interpretation of the atmospheric neutrino anomaly. We construct higher
dimensional operators in the framework of the standard model. The operators
which allow the particularly interesting decay mode are of dimension 10
involving $SU(2)_L$ n... | 1993-07-12 | 2009-10-22 | [
"hep-ph"
] | Patrick J. O'Donnell and Utpal Sarkar |
hep-ph/9307249 | Light Stop and the $b\rightarrow s\gamma$ Process | A constraint from $b\rightarrow s\gamma$ process to the minimal
supersymmetric standard model is derived in the light stop region where the
coupling between the lighter stop and the $Z^0$ boson vanishes due to the
left-right mixing of the stop states. It is pointed out that although some
region in the parameter space i... | 1993-07-12 | 2009-10-22 | [
"hep-ph"
] | Yasuhiro Okada |
hep-ph/9307252 | Searching for Exotic Tau Decays | We discuss the potential of $\tau$-charm and B factories for the search of
new physics through the study of rare $\tau$ decays. We consider decays that
involve the violation of lepton flavour conservation. Such decays bear a close
relationship to the physics of neutrino mass and the properties of the lepton
sector of t... | 1993-07-12 | 2007-05-23 | [
"hep-ph"
] | R. Alemany, J.J. Gomez-Cadenas, M.C. Gonzalez-Garcia and J.W.F. Valle |
hep-ph/9307255 | Probing the Scalar Sector in $e^+ e^- \to Z \phi$ | We study possible deviations from the Standard Model in the reaction $e^+e^-
\to Z\phi$, where $\phi$ denotes a spinless neutral boson. We show how the $Z$
decay angular correlation can be used to extract detailed information on the
$\phi$ couplings, such as the parity of $\phi$, radiatively induced form factor
effects... | 1993-07-12 | 2007-05-23 | [
"hep-ph"
] | M. L. Stong and K. Hagiwara |
hep-ph/9307250 | Beyond the black disk limit | We consider consequences of violation of the black disk limit possibly
revealed by the new CDF measurements of the total, elastic and diffractive
cross--sections. | 1993-07-12 | 2009-10-22 | [
"hep-ph"
] | S. M. Troshin and N. E. Tyurin |
hep-ph/9307247 | Differential Distributions in Semileptonic Decays of the Heavy Flavors
in QCD | Several references added, typos corrected. | 1993-07-12 | 2014-11-17 | [
"hep-ph"
] | B. Blok (University of California, Santa Barbara), L. Koyrakh, M.
Shifman, A.I. Vainshtein (University of Minnesota) |
hep-ph/9307251 | Hadrons and Glue at a Tau-Charm Factory | I discuss the special opportunities that a Tau-Charm Factory offers for
identifying gluonic excitations, hybrid charmonium and other exotic hadronic
states. (Invited talk at TCF Workshop, Marbella, 1-6June) | 1993-07-12 | 2007-05-23 | [
"hep-ph"
] | Frank Close |
hep-ph/9307245 | Hyperfine Mass Splittings of Baryons Containing a Heavy Quark in Large N
QCD | The hyperfine mass splittings of baryons containing a heavy quark are derived
at leading order in large $N$ QCD. Hyperfine splittings either preserve or
violate heavy quark spin symmetry. Previous work proves that the splittings
which preserve heavy quark spin symmetry are proportional to ${\bf J}^2$ at
order $1/N$, wh... | 1993-07-11 | 2008-11-26 | [
"hep-ph"
] | E. Jenkins |
hep-ph/9307242 | 1/N Corrections to the Baryon Axial Currents in QCD | We prove that the 1/N corrections to the baryon axial current matrix elements
are proportional to their lowest order values. This implies that the first
correction to axial current coupling constant ratios vanishes, and that the
$SU(2N_f)$ spin-flavor symmetry relations are only violated at second order in
1/N. | 1993-07-11 | 2009-10-22 | [
"hep-ph"
] | Roger Dashen and Aneesh V. Manohar |
hep-ph/9307244 | Baryon Hyperfine Mass Splittings in Large N QCD | The hyperfine mass splittings of baryons in large $N$ QCD are proved to be
proportional to ${\bf J}^2$. Hyperfine mass splittings are first allowed at
order $1/N$ in the $1/N$ expansion. | 1993-07-11 | 2008-11-26 | [
"hep-ph"
] | E. Jenkins |
hep-ph/9307246 | Vacuum QCD and new information on nucleon structure functions | It is shown, that specific chirality and flavor properties of the
instanton-induced interaction allow us to explain the observed violation
Ellis-Jaffe and Gottfried sum rules. A large value of these violations
originates from the anomalous growth of the instanton-induced interaction
between quarks at high energy. The n... | 1993-07-11 | 2008-02-03 | [
"hep-ph"
] | N.I.Kochelev |
hep-ph/9307243 | Light Quark Spin-Flavor Symmetry for Baryons Containing a Heavy Quark in
Large N QCD | The couplings and interactions of baryons containing a heavy quark are
related by light quark spin-flavor symmetry in the large $N$ limit. The single
pion coupling constant which determines all heavy quark baryon-pion couplings
is equal to the pion coupling constant for light quark baryons. Light quark
symmetry relatio... | 1993-07-11 | 2008-11-26 | [
"hep-ph"
] | E. Jenkins |
hep-ph/9307241 | Baryon-Pion Couplings from Large-N QCD | We derive a set of consistency conditions for the pion-baryon coupling
constants in the large-N limit of QCD. The consistency conditions have a unique
solution which are precisely the values for the pion-baryon coupling constants
in the Skyrme model. We also prove that non-relativistic $SU(2N_f)$ spin-flavor
symmetry (... | 1993-07-11 | 2009-10-22 | [
"hep-ph"
] | Roger Dashen and Aneesh V. Manohar |
hep-ph/9307239 | W, Z and Higgs Scattering at SSC Energies | The scattering of $W$, $Z$ and Higgs bosons in the Standard Model is
investigated in the region $s,m_H^2\gg m_W^2$ with no restrictions on relative
sizes of $s$ and $m_H^2$, so that our results are applicable at energies below
as well as above $2m_H$. We have calculated, with the inclusion of the full
one-loop correcti... | 1993-07-09 | 2009-10-22 | [
"hep-ph"
] | Suraj N. Gupta, James M. Johnson and Wayne W. Repko |
hep-ph/9307240 | High Energy Neutrino Telescopes Detect Supernovae | We have simulated the response of a high energy neutrino telescope to the
stream of low energy neutrinos produced by a supernova. The nominal threshold
of such detectors is in the GeV energy range. The passage of a large flux of
MeV neutrinos during a period of seconds will nevertheless be detected as an
excess of sing... | 1993-07-09 | 2007-05-23 | [
"hep-ph"
] | F. Halzen, J. E. Jacobsen, and E. Zas |
hep-ph/9307238 | Measuring the Longitudinally Polarized Proton Gluon Distribution using
Photoproduction Processes | Little information is known about the polarization of gluons inside a
longitudinally polarized proton. We investigate the sensitivity of
photoproduction experiments with both beam and target longitudinally polarized
to the polarization of the gluon distribution in the proton. We study the
photoproduction of jets and he... | 1993-07-09 | 2010-11-01 | [
"hep-ph"
] | S. Keller and J. F. Owens |
hep-ph/9307234 | Chiral-Symmetry and Strange Four-Quark Matrix Elements | We consider the matrix elements of the left-handed flavor-conserving
four-quark operators in the nucleon and pion states. Using chiral symmetry, we
derive relationships among these matrix elements. We argue that the $\Delta I =
1/2$ rule of hyperon and kaon non-leptonic weak decay implies possible large
strange-quark c... | 1993-07-08 | 2009-10-22 | [
"hep-ph"
] | Xiangdong Ji |
hep-ph/9307235 | Chiral-Odd and Spin-Dependent Quark Fragmentation Functions and their
Applications | We define a number of quark fragmentation functions for spin-0, -1/2 and -1
hadrons, and classify them according to their twist, spin and chirality. As an
example of their applications, we use them to analyze semi-inclusive
deep-inelastic scattering on a transversely polarized nucleon. | 1993-07-08 | 2009-10-22 | [
"hep-ph"
] | Xiangdong Ji |
hep-ph/9307237 | Blois V: Summary Talk | Although we have a theory of strong interactions, its implications for the
physics of average hadron collisions, which is the focus of this series of
conferences, are far from obvious. QCD has nevertheless been a very powerful
guide and I will argue that a consensus description of ``soft" hadronic physics
is emerging a... | 1993-07-08 | 2007-05-23 | [
"hep-ph"
] | F.Halzen |
hep-ph/9307232 | CP Violating Observables in $e^-e^+ \to W^-W^+$ | We consider various integrated lepton charge-energy asymmetries and azimuthal
asymmetries as tests of CP violation in the process $e^-e^+ \to W^-W^+$. These
asymmetries are sensitive to different linear combinations of the CP violating
form factors in the three gauge boson $W^-W^+$ production vertex, and can
distinguis... | 1993-07-08 | 2009-09-01 | [
"hep-ph"
] | Darwin Chang, Wai-Yee Keung, and Ivan Phillips |
hep-ph/9307233 | Does $J/\psi \rightarrow \pi^{+} \pi^{-}$ fix the Electromagnetic Form
Factor $F_{\pi}(t)$ at $t=M_{J/\psi}^2$? | We show that the $J/\psi \rightarrow \pi^{+} \pi^{-}$ decay is a reliable
source of information for the electromagnetic form factor of the pion at
$t=M_{J/\psi}^2=9.6 {\rm GeV}^2$ by using general arguments to estimate, or
rather, put upper bounds on, the background processes that could spoil this
extraction. We briefl... | 1993-07-08 | 2009-10-22 | [
"hep-ph"
] | J. Milana, S. Nussinov, M. G. Olsson |
hep-ph/9307236 | A Simple Test for Non-Gaussianity in CMBR Measurements | We propose a set of statistics $S_q$ for detecting non-gaussianity in CMBR
anisotropy data sets. These statistics are both simple and, according to
calculations over a space of linear combinations of three-point functions,
nearly optimal at detecting certain types of non-gaussian features. We apply
$S_3$ to the UCSB SP... | 1993-07-08 | 2007-05-23 | [
"hep-ph",
"astro-ph"
] | Paul Graham, Neil Turok, Philip Lubin and Jeff Schuster |
hep-ph/9307228 | Nuclear Shell Model Calculations of Neutralino-Nucleus Cross Sections
for Silicon 29 and Germanium 73 | We present the results of detailed nuclear shell model calculations of the
spin-dependent elastic cross section for neutralinos scattering from \si29 and
\ge73. The calculations were performed in large model spaces which adequately
describe the configuration mixing in these two nuclei. As tests of the computed
nuclear ... | 1993-07-07 | 2009-10-22 | [
"hep-ph",
"astro-ph",
"nucl-th"
] | M.T. Ressell, M.B. Aufderheide, S.D. Bloom, K. Griest, G.J. Mathews,
D.A. Resler |
hep-ph/9307231 | Cosmological Constraint on the Scale of the Supersymmetric Singlet
Majoron | In a SUSY theory with a spontaneously broken global symmetry, G, if the scale
of SUSY breaking, $M_s$ is smaller than the scale $M_G$ of the global symmetry,
the Nambu-Goldstone boson, $\chi$ is accompanied by two massive superpartners (
a fermionic, $\Psi_\chi$ and a scalar $\sigma_\chi$) with mass of order $M_s$.
Cos... | 1993-07-07 | 2014-11-17 | [
"hep-ph"
] | R.N. Mohapatra and X. Zhang |
hep-ph/9307230 | Heavy Quark Effective Theory at Large Orders in $1/m$ | The existing derivations of a heavy quark effective theory (HQET) are
analyzed beyond the next-to-leading order in $1/m$. With one exception they are
found to be incorrect. The problem is a wrong normalization of the heavy quark
field in the effective theory. We argue that the correct effective theory
should be given b... | 1993-07-07 | 2009-10-22 | [
"hep-ph"
] | S.Balk, J.G.Korner and D.Pirjol |
hep-ph/9307229 | Real time thermal propagtors for massive gauge bosons | We derive Feynman rules for gauge theories exhibiting spontaneous symmetry
breaking using the real-time formalism of finite temperature field theory. We
also derive the thermal propagators where only the physical degrees of freedom
are given thermal boundary conditions. We analyse the abelian Higgs model and
find that ... | 1993-07-07 | 2009-10-22 | [
"hep-ph"
] | T.S.Evans and A.C. Pearson |
hep-ph/9307223 | Bounding Anomalous Gauge-Boson Couplings | In this version we have corrected some minor errors in the tables, corrected
typos, and added a reference. We have also updated our comparison with earlier
workers. Figures are now included as uuencoded compressed tar files. | 1993-07-06 | 2010-11-01 | [
"hep-ph"
] | C.P. Burgess, Stephen Godfrey, Heinz K\"onig, David London and Ivan
Maksymyk |
hep-ph/9307225 | Higgs Production in Association with a Vector Boson Pair at Future e+ e-
Colliders | We study Higgs boson production in association with a pair of electroweak
vector bosons ($WW,ZZ,Z\gamma$) at future $\epem$ colliders in the framework of
the Standard Model. Total cross sections and distributions for the
intermediate-mass Higgs are presented, with special emphasis on the Next Linear
Collider (NLC) case... | 1993-07-06 | 2009-10-22 | [
"hep-ph"
] | M.Baillargeon, F. Boudjema, F.Cuypers, E. Gabrielli and B. Mele |
hep-ph/9307226 | Conditions on supersymmetry soft-breaking terms from GUTs | We study the effect of integrating out the heavy fields in a supersymmetric
GUT which does not contain small mass parameters in the limit of exact
supersymmetry. The trilinear ($A$) and bilinear ($B$) coefficients of the
supersymmetry soft-breaking terms of the low-energy effective theory are
related in a simple and mo... | 1993-07-06 | 2009-10-22 | [
"hep-ph"
] | G.F. Giudice and E. Roulet |
hep-ph/9307227 | Measurement of the Strange Quark Distribution Function in W + Charm
Quark Events | We investigate the prospects of measuring the strange quark distribution
function at the Tevatron, using $W$ plus charm quark events. The $W$ plus charm
quark signal produced by strange quark--gluon fusion, $sg\rightarrow W^-c$ and
$\bar sg\rightarrow W^+\bar c$, is approximately 5\% of the inclusive $W+1$ jet
cross se... | 1993-07-06 | 2007-05-23 | [
"hep-ph"
] | U. Baur, F. Halzen, S.Keller, M. L. Mangano, and K. Riesselmann |
hep-ph/9307224 | Bounds from Stability and Symmetry Breaking on Parameters in the
Two-Higgs-Doublet Potential | The most general $SU(2)\times U(1)_Y$-symmetric quartic potential with two
Higgs doublets, subject to an only softly broken discrete symmetry
$(\phi_1,\phi_2)\to(-\phi_1,\phi_2)$, is considered. At tree-level, analytic
bounds on the parameters are derived that ensure a stable vacuum, breaking
$SU(2)\times U(1)_Y$ down ... | 1993-07-06 | 2007-05-23 | [
"hep-ph"
] | Boris Kastening |
hep-ph/9307218 | Effect of Hairpin Diagram on Two-body Nonleptonic B Decays and CP
Violation | A careful quark-diagram analysis shows that a number of two-body nonleptonic
$B$ decays can occur through the so-called hairpin diagram, a QCD loop-induced
graph different from penguin in final-state hadronization of valence quarks.
Using the two-loop renormalization-group-improved effective Hamiltonian and the
naive f... | 1993-07-05 | 2010-11-01 | [
"hep-ph"
] | Dongsheng Du and Zhi-zhong Xing |
hep-ph/9307222 | $B_c$ Mesons Production at Hadron Colliders by Heavy Quark Fragmentation | We present a reliable estimate on the production rate of $B_c$ mesons in $1S$
and $2S$ states in the large transverse momentum region at hadronic colliders
using heavy quark fragmentation functions derived within the framework of
perturbative QCD. We also present the transverse momentum distribution for the
$B_c$ meson... | 1993-07-05 | 2009-10-22 | [
"hep-ph"
] | Kingman Cheung |
hep-ph/9307219 | Majorana Neutrino Masses Can Save One Family Technicolour | We make non perturbative estimates of the electroweak radiative correction
parameter $S$ in dynamical symmetry breaking models with Majorana neutrino
masses. The Majorana masses are treated as perturbations to a Non Local Chiral
Model of the strong interactions. We argue that parameter ranges exist that
would allow rea... | 1993-07-05 | 2009-10-22 | [
"hep-ph"
] | NJ Evans and DA Ross |
hep-ph/9307217 | Two-loop renormalization of gaugino mass in supersymmetric gauge model | We study the two-loop renormalization group equation for the running gaugino
mass in the supersymmetric gauge theory. We find that both in the \msbar and
\drbar renormalization schemes, the well-known proportionality of the runnings
of the gaugino mass and the gauge coupling constant is violated at the two-loop
order, ... | 1993-07-05 | 2009-10-22 | [
"hep-ph"
] | Youichi Yamada |
hep-ph/9307221 | q\bar q$ bound states in the Bethe-Salpeter formalism | We solve the Bethe-Salpeter equation in order to calculate the spectrum of
pseudoscalar, vector and scalar meson bound states for light as well as heavy
quarks, extending our previous calculation of pseudoscalar mesons. The fermion
propagators appearing in the equation are obtained by solving the
Schwinger-Dyson equati... | 1993-07-05 | 2009-10-22 | [
"hep-ph"
] | P. Jain and H. J. Munczek |
hep-ph/9307220 | A New Gauge for Computing Effective Potentials in Spontaneously Broken
Gauge Theories | A new class of renormalizable gauges is introduced that is particularly well
suited to compute effective potentials in spontaneously broken gauge theories.
It allows one to keep free gauge parameters when computing the effective
potential from vacuum graphs or tadpoles without encountering mixed propagators
of would-be... | 1993-07-05 | 2009-10-22 | [
"hep-ph",
"hep-th"
] | Boris Kastening |
hep-ph/9307212 | Spontaneous Baryogenesis with Observable CP Violation | Using a left-right symmetric model with Spontaneous CP Violation and the
hypothesis of a weakly first order electroweak phase transition we derive a
relation between the produced baryon asymmetry and the observed parameter
$\varepsilon$, describing CP violation in the $K$ system. | 1993-07-03 | 2010-11-01 | [
"hep-ph"
] | L. Reina and M. Tytgat |
hep-ph/9307216 | Heavy Hadron Weak Decay Form Factors to Next-to-Leading Order in 1/m | Based on the short-distance expansion of currents in the heavy quark
effective theory, we derive the exact expressions for the heavy-to-heavy meson
and baryon weak decay form factors to order $1/m_Q$ in the heavy quark
expansion, and to all orders in perturbation theory. We emphasize that the
Wilson coefficients in thi... | 1993-07-03 | 2009-10-22 | [
"hep-ph"
] | Matthias Neubert |
hep-ph/9307209 | Constraints on the Higss and Top Quark Masses From Effective Potential
and Non-Commutative Geometry | We consider the standard model in the formulationo of non-commutative
geometry, for a Euclidean space-time consisting of two copies. The electroweak
scale is set by the vacuum expectation value of a scalar field and is
undetermined at the classical level. By adding the Coleman-Weinberg effective
potential, that scale t... | 1993-07-02 | 2009-10-22 | [
"hep-ph",
"hep-th"
] | A.H. Chamseddine and J. Fr\"ohlich |
hep-ph/9307215 | CP and CPT Violation: Status and Prospects | I review the status of CP violating phenomena and CPT tests in the neutral
Kaon system. Comparisons of present data with the expectations of the Cabibbo
Kobayashi Maskawa model are presented, with particular emphasis being focused
on the role of the theoretical uncertainties in this comparison. In addition,
novel tests... | 1993-07-02 | 2008-02-03 | [
"hep-ph"
] | R.D. Peccei |
hep-ph/9307210 | Thermalization of the Higgs Field at the Electroweak Phase Transition | The thermalization rate for long wavelength fluctuations in the Higgs field
is calculated from the imaginary part of the finite temperature effective
action in the unbroken phase of the Standard Model. We use improved propagators
including a resummation of hard thermal loops. The thermalization rate is
computed at one ... | 1993-07-02 | 2011-04-20 | [
"hep-ph"
] | Per Elmfors, Kari Enqvist and Iiro Vilja |
hep-ph/9307211 | The SuperWorlds of SU(5) and SU(5)xU(1): A Critical Assessment and
Overview | We present an overview of the simplest supergravity models which enforce
radiative breaking of the electroweak symmetry, namely the minimal $SU(5)$
supergravity model and the class of string-inspired/derived supergravity models
based on the flipped $SU(5)\times U(1)$ structure supplemented by a minimal set
of additiona... | 1993-07-02 | 2007-05-23 | [
"hep-ph"
] | J. Lopez, D. Nanopoulos, and A. Zichichi |
hep-ph/9307214 | The Strong CP Problem, String Theory and the Nelson-Barr Mechanism | We review recent work on the strong CP problem in the context of realistic
string-inspired models. We discuss the various solutions, review the conjecture
that CP is generally a gauged discrete symmetry in string theory and then
consider models of the Nelson-Barr type. We note that squark non-degeneracy
spoils the Nels... | 1993-07-02 | 2007-05-23 | [
"hep-ph"
] | R. G. Leigh |
hep-ph/9307213 | Tree amplitudes at multiparticle threshold in a model with softly broken
$O(2)$ symmetry | Tree amplitudes of the production of two kinds of scalar particles at
threshold from one virtual particle are calculated in a model of two scalar
fields with $O(2)$ symmetric quartic interaction and unequal masses. These
amplitudes exhibit interesting factorial and exponential behaviour at large
multiplicities. As a by... | 1993-07-02 | 2008-11-26 | [
"hep-ph"
] | M.V. Libanov, V.A. Rubakov and S.V. Troitsky |
hep-ph/9307204 | Technidilaton Phenomenology and Prospects for Production | An effective Lagrangian for the technidilaton and its interactions with
matter is constructed. Properties of the technidilaton are compared with those
of the Higgs boson. Technidilaton decays and production channels are
investigated. Main technidilaton decays are suppressed compared to the Higgs
boson and the most impo... | 1993-07-01 | 2009-10-22 | [
"hep-ph"
] | Edi Halyo |
hep-ph/9307202 | Toponium as Nonabelian Positronium ? | The expected large mass $m_t$ of the top quark provides for the first time a
chance to discuss the bound-states of the corresponding quantum system as the
nonabelian generalization of positronium, using the full power of relativistic
quantum field theoretic methods which are available for weakly bound systems.
Thus our... | 1993-07-01 | 2007-05-23 | [
"hep-ph"
] | W.Kummer and W. M\"odritsch |
hep-ph/9307208 | Neutralino-Nucleon Scattering Revisited | We present a detailed discussion of the elastic scattering of a
supersymmetric neutralino off a nucleon or nucleus, with emphasis on the
spin--independent interaction. We carefully treat QCD effects on the squark
exchange contribution. In particular, we identify a class of terms that survive
even in the absence of mixi... | 1993-07-01 | 2008-11-26 | [
"hep-ph"
] | M. Drees and M.M. Nojiri |
hep-ph/9307205 | The Origin of the Sphaleron Dipole Moment | By providing a suitable definition of the electromagnetic field off the Higgs
vacuum, we show that within the sphaleron there is a monopole-antimonopole pair
with quantized charges, and a loop of electromagnetic current. On integration
of the relevant charges and currents over the interior in the limit of small
$\Theta... | 1993-07-01 | 2009-10-22 | [
"hep-ph"
] | Mark Hindmarsh and Margaret James |
hep-ph/9307207 | An Estimate of Jet Activity in $t\bar t$ Events | We present a calculation of jet activity associated with pair production of
top quarks at hadron colliders and supercolliders. Our approach is based upon a
merger of $2\rightarrow 3$ matrix elements with initial and final state parton
showers. We tabulate expected multi-jet rates in $t\bar t$ events, and compare
with $... | 1993-07-01 | 2009-10-22 | [
"hep-ph"
] | H. Baer, C.H. Chen and M. H. Reno |
hep-ph/9307203 | Formation of Topological Defects at First Order Phase Transitions | We analyze the evolution of scalar and gauge fields during first order phase
transitions and show how the Kibble mechanism for the formation of topological
defects emerges from the underlying dynamics, paying particular attention to
problems posed by gauge invariance when a local symmetry is spontaneously
broken. We di... | 1993-07-01 | 2011-07-19 | [
"hep-ph"
] | Mark Hindmarsh, Robert Brandenberger, and Anne-Christine Davies |
hep-ph/9307206 | Searching for Supersymmetry in High-Energy Photon-Proton Scattering | We investigate the possibility to search for supersymmetry in the scattering
of protons and Compton back-scattered laser light. We evaluate the cross
sections for inelastic and elastic production of wino pairs for different
electron-proton c.m.s. energies. For $\sqrt{s}=1\ TeV$ the cross section
exceeds $1\ fb$ for $m_... | 1993-07-01 | 2009-10-22 | [
"hep-ph"
] | W. Buchm\"uller and Z. Fodor |
hep-ph/9307201 | The Renormalization-Group Improved Higgs Sector of the Minimal
Supersymmetric Model | In the minimal supersymmetric model (MSSM) all Higgs self-coupling parameters
are related to gauge couplings at tree-level. Leading-logarithmic radiative
corrections to these quantities can be summed using renormalization group
techniques. By this procedure we obtain complete leading-log radiative
corrections to the Hi... | 1993-07-01 | 2009-10-22 | [
"hep-ph"
] | Howard E. Haber and Ralf Hempfling |
hep-ph/9306337 | Heavy Quark Correlations in Photon-Hadron Collisions | We describe a next-to-leading-order calculation of the fully exclusive parton
cross section for the photoproduction of heavy quarks. We use our result to
compute quantities of interest for current fixed-target experiments. We discuss
heavy-quark total cross sections, distributions and correlations. | 1993-07-01 | 2011-01-25 | [
"hep-ph"
] | S. Frixione, M. Mangano, P. Nason and G. Ridolfi |
hep-ph/9306336 | Baryogenesis through Collapsing String Loops in Gauged Baryon and Lepton
Models | A scenario for the generation of the baryon asymmetry in the early Universe
is proposed in which cosmic string loops, predicted by theories where the
baryon and/or lepton numbers are gauged symmetries, collapse during the
friction dominated period of string evolution. This provides a mechanism for
the departure from th... | 1993-06-30 | 2009-12-30 | [
"hep-ph"
] | H. Lew and A. Riotto |
hep-ph/9306335 | Deducing L_{fermion} at M_{GUT} using Low Energy Data or Towards a
Theory of Fermion Masses | In the last 20 years we have accumulated an enormous amount of data on
elementary particles and their interactions. This data serves two purposes: to
fix the phenomenological parameters of the Standard Model [SM] and to verify
that the SM is an excellent description of nature. It is our goal to understand
the origin of... | 1993-06-30 | 2007-05-23 | [
"hep-ph"
] | Stuart Raby |
hep-ph/9306333 | Renormalization Group Equations for Seesaw Neutrino Masses | RGEs for coefficients of dim-5 operators giving rise to neutrino masses in
the seesaw mechanism are written down in the SM, 2HDM and MSSM, and solved
numerically. RG evolution of these coefficients modifies tree-level seesaw
predictions for neutrino masses and mixing angles in SO(10)-type GUT models as
strongly as quar... | 1993-06-30 | 2009-10-22 | [
"hep-ph"
] | Piotr H. Chankowski, Zbigniew Pluciennik |
hep-ph/9306332 | Supersymmetric Unification without Proton Decay | We present a supersymmetric grand unification scheme based on the gauge group
SU(3)_c X SU(3)_L X SU(3)_R in which the proton and the lightest supersymmetric
particle are stable, neutrinos are necessarily massive, and the observed baryon
asymmetry originates in the lepton sector. Such models are also consistent with
th... | 1993-06-30 | 2008-11-26 | [
"hep-ph"
] | G.Lazarides, C.Panagiotakopoulos, Q.Shafi |
hep-ph/9306331 | On Quark Confinement | A sufficient condition for the confinement of quarks is presented. Quarks are
shown to be unobservable. Colour singlets are however, observables. The results
of deep inelastic scattering are discussed. We argue that QCD does not exhibit
a deconfining transition. | 1993-06-30 | 2007-05-23 | [
"hep-ph"
] | Martin Lavelle and David McMullan |
hep-ph/9306334 | Analysis of Weak-Interaction Effects in High Energy Hadron-Hadron
Collisions | Parity-violating (pv) effects in inclusive hadron and jet productions in high
energy hadron-hadron collisions are analyzed. Such effects arise from the
interference between strong and weak amplitudes. This interference gives rise
to a nonzero value of the pv parameters $A_L$ and $P_L$, where $A_L$ measures
the differen... | 1993-06-30 | 2009-10-22 | [
"hep-ph"
] | Hai-Yang Cheng, M. Huang, and C. F. Wai |
hep-ph/9306325 | Neutralino Annihilation to Gluons | We present a complete calculation of the cross section for neutralino
annihilation into the two-gluon final state. This channel can be quite
important for the phenomenology of neutralino annihilation due to the
well-known helicity suppression of neutralino annihilation into light quarks
and leptons. In addition, we cal... | 1993-06-29 | 2009-10-22 | [
"hep-ph",
"astro-ph"
] | M. Drees, G. Jungman, M. Kamionkowski, M. Nojiri |
hep-ph/9306326 | Cosmological Bound on the Decay $\pi^0\rightarrow\gamma X$ | Using the upper bound on the effective number of light neutrino species
during primordial nucleosynthesis and the cosmological pion-pole mechanism
$\gamma\gamma\rightarrow \pi^0\rightarrow \gamma X$, we obtain an upper limit
on the branching ratio for the decay BR$(\pi^0\rightarrow \gamma X)<3\times
10^{-13}$, where $X... | 1993-06-29 | 2008-11-26 | [
"hep-ph"
] | Kin-Wang Ng (Institute of Physics, Academia Sinica, Taiwan) |
hep-ph/9306329 | Strong $W_L W_L$ Scattering at Hadronic Supercolliders | We will summarize some aspects of the scenario of a strongly interacting
symmetry breaking sector via which the longitudinal vector boson scattering
becomes strong. We will examine the feasibility of observing such strong $W_L
W_L$ signal at the future hadronic supercolliders. | 1993-06-29 | 2007-05-23 | [
"hep-ph"
] | Kingman Cheung |
hep-ph/9306328 | Some Questions of Flavor in Supersymmetry | We consider certain naturalness questions in supersymmetric theories. Various
suggestions which give rise to squark degeneracies are reviewed. A stringy
scenario, discussed by Kaplunovsky and Louis, is the only one which leads to
complete degeneracy of squarks and sleptons at the high scale. Alternatives
include the po... | 1993-06-29 | 2007-05-23 | [
"hep-ph"
] | Michael Dine |
hep-ph/9306327 | SU(5)xU(1): a string paradigm of a TOE and its experimental consequences | We present a string-inspired/derived supergravity model based on the flipped
$SU(5)\times U(1)$ structure supplemented by a minimal set of additional matter
representations such that unification occurs at the string scale
($\sim10^{18}\GeV$). This model is complemented by two string supersymmetry
breaking scenaria: the... | 1993-06-29 | 2008-02-03 | [
"hep-ph"
] | J. Lopez, D. Nanopoulos, and A. Zichichi |
hep-ph/9306330 | Enhancing the Higgs signal in $pp\rightarrow ZZ\rightarrow
\ell^+\ell^-\nu\bar{\nu}$ | One of the possible modes suggested for detecting the Higgs particle is
$pp\rightarrow ZZ\rightarrow\ell^+\ell^-\nu\bar{\nu}$, where the Higgs appears
as a resonance on a Jacobian background. Unfortunately there are QCD background
processes which mimic the final state and we are obliged to impose stringent
kinematic cu... | 1993-06-29 | 2007-05-23 | [
"hep-ph"
] | M.J.Duncan and M.H.Reno |
hep-ph/9306324 | The Analytical Contribution of Some Eighth-Order Graphs Containing
Vacuum Polarization Insertions to the Muon (G-2) in QED | The contributions to the $g-2$ of the muon from some eighth-order (four-loop)
graphs containing one-loop and two-loop vacuum polarization insertions have
been evaluated analytically in QED perturbation theory, expanding the results
in the ratio of the electron to muon mass ${(m_e / m_\mu)}$. The results agree
with the ... | 1993-06-28 | 2009-10-22 | [
"hep-ph"
] | S. Laporta |
hep-ph/9306322 | SUSY-Induced CP Violation in $t$ Decays at $e^-e^+$ Colliders | CP violation in the decays $t \to \ell^+\nu b$ and $\bar t \to \ell^-\bar\nu
\bar b$ from the production process $e^-e^+ \to \ttbar$ is discussed. Since the
asymmetry proposed as a measure of CP violation vanishes even at the one-loop
level in the Standard Model (SM), it may be a useful tool to search for sources
of CP... | 1993-06-28 | 2009-09-01 | [
"hep-ph"
] | Bohdan Grzadkowski and Wai-Yee Keung |
hep-ph/9306323 | Low--Energy Behavior of Two--Point Functions of Quark Currents | We discuss vector, axial-vector, scalar and pseudoscalar two-point functions
at low and intermediate energies. We first review what is known from chiral
perturbation theory, as well as from a heat kernel expansion within the context
of the extended Nambu-Jona-Lasinio (ENJL) model of ref. \cite{12}. In this work
we deri... | 1993-06-28 | 2011-03-31 | [
"hep-ph",
"nucl-th"
] | Johan Bijnens, Eduardo de Rafael and Hanqing Zheng |
hep-ph/9306321 | Effective Lagrangians with Higher Order Derivatives | The problems that are connected with Lagrangians which depend on higher order
derivatives (namely additional degrees of freedom, unbound energy from below,
etc.) are absent if effective Lagrangians are considered because the equations
of motion may be used to eliminate all higher order time derivatives from the
effecti... | 1993-06-28 | 2009-10-22 | [
"hep-ph",
"hep-th"
] | Carsten Grosse-Knetter |
hep-ph/9306320 | Heavy Quark Symmetry | We review the current status of heavy quark symmetry and its applications to
weak decays of hadrons containing a single heavy quark. After an introduction
to the underlying physical ideas, we discuss in detail the formalism of the
heavy quark effective theory, including a comprehensive treatment of symmetry
breaking co... | 1993-06-26 | 2010-11-01 | [
"hep-ph"
] | Matthias Neubert |
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