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 |
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hep-ph/9306313 | Quark-gluon vertex and structure of mesons and diquarks | *REVISED VERSION* Two quark propagators with different analytic structure are
employed in on and off mass-shell Bethe-Salpeter type equations for the pion
and scalar diquark form-factors. One of the quark propagators has been
calculated with the inclusion of a trivial quark-gluon vertex and, as a
consequence, contains ... | 1993-06-25 | 2009-10-22 | [
"hep-ph"
] | Samuel J. Stainsby and Reginald T. Cahill |
hep-ph/9306318 | Natural CP Violation Criteria for the Minimal Supersymmetric Standard
Model | $CP$ violating effects in the Minimal Supersymmetric Standard Model (MSSM)
can lead to excessively large contributions to the neutron EDM (\dn). We write
criteria which ensure that the low energy supergravity (SUGRA) parametrization
of the MSSM does not require fine-tunings or large mass scales to evade the
constraint ... | 1993-06-25 | 2010-11-01 | [
"hep-ph"
] | Robert Garisto |
hep-ph/9306319 | Guaranteed Detection of a Minimal Supersymmetric Model Higgs Boson at
Hadron Supercolliders | We demonstrate that expected efficiencies and purities for $b$-tagging at
SSC/LHC detectors should allow detection of at least one of the Higgs bosons of
the Minimal Supersymmetric Model in $t\anti t$~Higgs production, with
Higgs$\rta b\anti b$ decay, over a substantial range of supersymmetric
parameter space. In parti... | 1993-06-25 | 2009-10-22 | [
"hep-ph"
] | J. Dai, J.F. Gunion and R. Vega |
hep-ph/9306317 | Low-mass dileptons from nonequilibrium QGP | The rate of the emission of the high energy low-mass dileptons from the QGP
is found in the first nonvanishing order with respect to strong coupling. We
base on the real-time kinetic approach [2] without an explicit assumption about
a complete thermal equilibrium in the emitting system. For the class of the
partons dis... | 1993-06-25 | 2007-05-23 | [
"hep-ph"
] | A. Makhlin |
hep-ph/9306316 | Supergravity Grand Unification, Proton Decay and Cosmological
Constraints | Properties and experimental predictions of a broad class of supergravity
grand unified models possessing an $SU(5)$-type proton decay and $R$ parity are
described. Models of this type can be described in terms of four parameters at
the Gut scale in addition to those of the Standard Model i.e. $m_o$ (universal
scalar ma... | 1993-06-25 | 2007-05-23 | [
"hep-ph"
] | R. Arnowitt and Pran Nath |
hep-ph/9306315 | Theoretical Predictions for W-Pair Production | We review the status of theoretical predictions for W-pair production at high
energies. We discuss a systematic scenario towards a Monte-Carlo generator for
e^+e^- --> 4f(\gamma), which meets the experimental requirements. In particular
we summarize the recent developments in this field. | 1993-06-25 | 2007-05-23 | [
"hep-ph"
] | W. Beenakker and A. Denner |
hep-ph/9306310 | $\bar B\to\bar K\e^+\e^-$ in Chiral Perturbation Theory | The combined use of chiral $SU(3)$ and heavy quark symmetries allows one to
relate the hadronic form factors for the decay $\bar B\to \bar K\e^+\e^-$ to
those for $\bar B\to\pi\e^-\bar\nu$. We investigate departures from the
symmetry limit which arise from chiral symmetry breaking. The analysis uses
chiral perturbation... | 1993-06-24 | 2009-10-22 | [
"hep-ph"
] | Adam F. Falk and Benjamin Grinstein |
hep-ph/9306309 | The Top Quark Mass in Supersymmetric SO(10) Unification | The successful prediction of $\sin^2\theta_W$ suggests that the effective
theory beneath the GUT scale is the two-Higgs MSSM. If we further assume that
the unified gauge group contains SO(10), that the two light Higgs doublets lie
mostly in a single irreducible SO(10) representation, and that the $t$, $b$ and
$\tau$ ma... | 1993-06-24 | 2013-11-13 | [
"hep-ph"
] | Lawrence J. Hall, Riccardo Rattazzi and Uri Sarid |
hep-ph/9306311 | Renormalization Group Study of the Minimal Supersymmetric Standard Model
: No Scale Models | We present partial numerical results in the Minimal Supersymmetric Standard
Model with soft breaking of supersymmetry, and radiative breaking of the
electroweak symmetry. We impose the additional relation, bottom mass = tau mass
at the GUT scale. For the special case of the strict no-scale model, in which
global supers... | 1993-06-24 | 2007-05-23 | [
"hep-ph"
] | Pierre Ramond |
hep-ph/9306312 | Extraction of $Z'$ Coupling Data From $Z' \to jj$ at the LHC and SSC | A recent analysis has shown that it may be possible at the SSC to extract
information about $Z'$ couplings via the decay $Z' \to jj$. This technique was
found to be useful for some extended electroweak models provided the $Z'$ is
relatively light. In the present paper, we generalize this procedure to the LHC
and to $Z'... | 1993-06-24 | 2007-05-23 | [
"hep-ph"
] | T.G. Rizzo |
hep-ph/9306307 | Quantum Corrections to the Electroweak Sphaleron Transition | We have performed a new exact evaluation of the fluctuation determinant
$\kappa$ of the electroweak sphaleron with $\Theta _W =0$. The results differ
significantly from a previous calculation of this quantity by Carson et. al. .
We find that $\kappa$ is of order 1 in units $(gv)^6$ while the previous
results indicated ... | 1993-06-23 | 2015-06-25 | [
"hep-ph"
] | J. Baacke and S. Junker |
hep-ph/9306305 | The Nambu-Jona-Lasinio Chiral Soliton with Constrained Baryon Number | A regularization for the baryon number consistent with the energy in the
Nambu-Jona-Lasinio model is introduced. The soliton solution is constructed
with the regularized baryon number constrained to unity. It is furthermore
demonstrated that this constraint prevents the soliton from collapsing when
scalar fields are al... | 1993-06-23 | 2008-11-26 | [
"hep-ph"
] | J. Schlienz, H. Weigel, H. Reinhardt and R. Alkofer |
hep-ph/9306314 | Sparticle Spectrum Constraints | The supersymmetric standard model with supergravity-inspired soft breaking
terms predicts a rich pectrum of sparticles to be discovered at the SSC, LHC
and NLC. Because there are more supersymmetric particles than unknown
parameters, one can write down sum rules relating their masses. We discuss the
pectrum of sparticl... | 1993-06-23 | 2011-03-04 | [
"hep-ph"
] | Stephen P. Martin and Pierre Ramond |
hep-ph/9306306 | Quartic Anomalous Couplings in $e\gamma$ Colliders | We study the production of gauge boson pairs at the next generation of linear
$e^+e^-$ colliders operating in the $e\gamma$ mode. The processes $e\gamma
\rightarrow VV^\prime F$ ($V,V^\prime =W$, $Z$, or $\gamma$ and $F=e$ or $\nu$)
can give valuable information on possible deviations of the quartic vector
boson coupli... | 1993-06-23 | 2009-10-22 | [
"hep-ph"
] | O.J.P.Eboli, M.C.Gonzalez-Garcia, and S.F.Novaes |
hep-ph/9306303 | Valley Singularities and Baryon Number Violation | We consider the valley--method computation of the inclusive cross section of
baryon number violating processes in the Standard Model. We show that any
physically correct model of the valley action should present a singularity in
the saddle point valley parameters as functions of the energy of the process.
This singular... | 1993-06-23 | 2014-11-17 | [
"hep-ph"
] | Paolo Provero |
hep-ph/9306304 | A Partial Unification Model in Non-commutative Geometry | We consider the construction of $SU(2)_{L}\otimes SU(2)_{R}\otimes SU(4)$
partial unification models as an example of phenomenologically acceptable
unification models in the absence of supersymmetry in non-commutative geometry.
We exploit the Chamseddine, Felder and Fr\"ohlich generalization of the Connes
and Lott mode... | 1993-06-23 | 2009-10-22 | [
"hep-ph"
] | B. E. Hanlon and G. C. Joshi |
hep-ph/9306308 | Standard Model Higgs Boson at Linear Photon Colliders | We will summarize some aspects of the standard model Higgs boson at high
energy $\gamma\gamma$ colliders, where the photon beams are realized by the
laser backscattering method, including the direct Higgs boson production via
$\gamma\gamma\rightarrow H$, and the measurement of the Yukawa coupling via the
channel $\gamm... | 1993-06-23 | 2007-05-23 | [
"hep-ph"
] | kingman Cheung |
hep-ph/9306301 | On semi-classical pion production in heavy ion collisions | In high energy heavy ion collisions the pion multiplicity is large, and one
might expect that pions are radiated semi-classically. The axial symmetry of
the collision and approximately zero isotopic spin of the colliding nuclei
result then in peculiar isotopic spin -- azimuth correlations of the produced
pions. These c... | 1993-06-22 | 2010-11-01 | [
"hep-ph",
"nucl-th"
] | Jean-Paul Blaizot, Dmitri Diakonov |
hep-ph/9306302 | Hadronic $W$ production and the Gottfried Sum Rule | The difference in production rate between $W^+$ and $W^-$ at hadron colliders
is very sensitive to the the difference between up- and down-quark
distributions in the proton. This sensitivity allows for a variety of useful
measurements. We consider the difference $d_s(x,Q^2) - u_s(x,Q^2)$ in the sea
distributions and th... | 1993-06-22 | 2011-02-01 | [
"hep-ph"
] | M. A. Doncheski, F. Halzen, C. S. Kim and M. L. Stong |
hep-ph/9306300 | Electroweak symmetry breaking through supersymmetry breaking | The connection between the scales of $ {\rm SU} (2)\times {\rm U} (1) $ gauge
symmetry breaking and supersymmetry breaking is didactically displayed in the
framework of a T.O.Y. (Theory Overestimating Yukawas) model, a version of the $
(M+1)SSM $ (supersymmetric extension of the standard model with a gauge
singlet) in ... | 1993-06-22 | 2007-05-23 | [
"hep-ph"
] | C.A. Savoy |
hep-ph/9306299 | Origin of Difference between $\overline{d}$ and $\overline{u}$ Partons
in the Nucleon | Using the Euclidean path-integral formulation for the hadronic tensor, we
show that the violation of the Gottfried sum rule does not come from the
disconnected quark-loop insertion. Rather, it comes from the connected (quark
line) insertion involving quarks propagating in the backward time direction. We
demonstrate thi... | 1993-06-21 | 2011-02-01 | [
"hep-ph",
"hep-lat"
] | Keh-Fei Liu and Shao-Jing Dong |
hep-ph/9306297 | Predicting the neutrino spectrum in minimal SO(10) Grand Unification | Analysis of the model of Babu and Mohapatra for the mass matrices in SO(10),
with survey of the different types of neutrino spectra possible in that model | 1993-06-21 | 2009-10-22 | [
"hep-ph"
] | L. Lavoura (Carnegie-Mellon University) |
hep-ph/9306294 | Soft Collective Excitations in Hot Gauge Theories | THE PREVIOUS LATEX STRUCTURE WAS MODIFIED IN ORDER TO ALLOW FOR A DIRECT
IMPRESSION OF THE PAPER, WITHOUT SUPPLEMENTARY SPLITTING. THERE IS NO TEXT
MODIFICATION. | 1993-06-21 | 2009-10-22 | [
"hep-ph"
] | Jean-Paul BLAIZOT and Edmond IANCU (Service de Physique Th\'eorique,
Saclay) |
hep-ph/9306295 | Construction of a New Electroweak Sphaleron | We present a self-consistent ansatz for a new sphaleron in the electroweak
standard model. The resulting field equations are solved numerically. This
sphaleron sets the height of the energy barrier for the global SU(2) anomaly. | 1993-06-21 | 2009-10-22 | [
"hep-ph"
] | F. R. Klinkhamer |
hep-ph/9306296 | On Non-Perturbative Effects at the High-Temperature Electroweak Phase
Transition | It is argued that confining effects in 3-dimensional non-Abelian gauge
theories (high-temperature limit of 4-dimensional ones) imply the existence of
the condensates of the gauge and Higgs fields in 3-d vacuum. This
non-perturbative effect can decrease the energy of the phase with unbroken
symmetry and may result in th... | 1993-06-21 | 2009-10-22 | [
"hep-ph"
] | M. Shaposhnikov |
hep-ph/9306293 | Dilution of Cosmological Densities by Saxino Decay | Saxino decay can generate significant cosmological entropy, and hence dilute
theoretical estimates of the present mass density of a given particle species.
The dilution factor depends on the saxino and axion masses, and is constrained
by the requirement that saxino decay should not affect nucleosynthesis, as well
as by... | 1993-06-21 | 2009-12-30 | [
"hep-ph",
"astro-ph"
] | David H. Lyth |
hep-ph/9306298 | Gluon Plasma Frequency -- the Next-to-Leading Order Term | The longitudinal-electric oscillations of the hot gluon system are studied
beyond the well known leading order term at high temperature $T$ and small
coupling $g$. The coefficient $\eta$ in $\omega^2 = m^2 \, (1+ \eta \, g \wu N
\, )$ is calculated, where \hbox{$\omega \equiv \omega (\vc q =0)$} is the
long-wavelength ... | 1993-06-21 | 2009-10-22 | [
"hep-ph"
] | Hermann Schulz |
hep-ph/9306291 | Electroweak corrections to decays involving a charged Higgs boson | We present complete one-loop radiative corrections to the decay rate of a top
quark into a charged Higgs boson and a bottom quark, and for the decay of a
charged Higgs boson into leptons. The results are discussed in the framework of
the two Higgs boson extension of the Standard Model suggested by supersymmetry.
The ef... | 1993-06-20 | 2009-10-22 | [
"hep-ph"
] | Andrzej Czarnecki |
hep-ph/9306292 | Implications of $b\rightarrow s\gamma$ for CP Violation in Charged
Scalar Exchange | In models of three or more scalar doublets, new CP violating phases appear in
charged scalar exchange. These phases affect CP asymmetries in neutral $B$
decays, even if Natural Flavor Conservation holds. The recent upper bound on
the decay $b\rightarrow s\gamma$ constrains the effect to be at most of order a
few percen... | 1993-06-20 | 2010-11-01 | [
"hep-ph"
] | Yuval Grossman and Yosef Nir |
hep-ph/9306289 | Consistent Analysis of the Spin Content of the Nucleon | The recent measurements of lepton nucleon scattering with polarised neutron
and deuteron targets are analysed together with the previous polarised proton
data in a mutually consistent way. The detailed $x$-dependence of the
polarisation asymmetry in the valence region is shown to be in agreement with
historical predict... | 1993-06-18 | 2009-10-22 | [
"hep-ph"
] | F.E. Close and R.G. Roberts |
hep-ph/9306285 | The Coupling of the Pion to Two Gauge Fields and to Leptons in a
Dynamically Broken Gauge Theory | We show how a spontaneously broken gauge theory of fermions endowed with a
composite scalar multiplet becomes naturally anomaly-free, and yet describes
the correct couplings of the pion to two gauge fields and to leptons: the first
coupling is the same as computed from the chiral anomaly, and the second
identical with ... | 1993-06-18 | 2009-10-22 | [
"hep-ph"
] | B. Machet |
hep-ph/9306286 | SUSY Soft Breaking Terms from String Scenarios | The general SUSY soft breaking terms for a large class of phenomenologically
relevant string scenarios (symmetric orbifolds) are given. They show a certain
lack of universality, but not dangerous for flavor changing neutral currents.
To get more quantitative results a specific SUSY breaking mechanism has to be
consider... | 1993-06-18 | 2007-05-23 | [
"hep-ph",
"hep-th"
] | B. de Carlos, J.A. Casas and C. Munoz |
hep-ph/9306287 | Direct vs. resolved photon: an exercise in factorization | Direct and resolved photon interactions are shown to be intimately related
through the factorization mechanism. It is argued that in theoretically
consistent analysis of jet production in $\gamma$p and ep collisions the LO
resolved $\gamma$ contribution must be considered together with the NLO direct
$\gamma$ component... | 1993-06-18 | 2016-08-14 | [
"hep-ph"
] | J.Ch\'yla |
hep-ph/9306290 | No Parity Violation without R Parity Violation | In a class of supersymmetric left-right models (SUSYLR) of weak interactions
where R-parity is automatically conserved, we show that spontaneous breakdown
of parity CANNOT occur without spontaneous breakdown of R-parity. This
intriguing result connects two physically different scales in supersymmetric
models. | 1993-06-18 | 2009-07-09 | [
"hep-ph"
] | Ravi Kuchimanchi and R.N. Mohapatra (University of Maryland Preprint
No. UMP-PP-93-209, College Park, MD) |
hep-ph/9306288 | The Nucleon Spin Crisis Bible | When the new data on polarised lepton nucleon scattering are compared at the
same value of $Q^2$ and with a common set of assumptions, a consistent picture
of the spin content of the nucleon begins to emerge. Higher order effects in
$0(\alpha_s)$, higher twist effects, modern data on unpolarised structure
functions and... | 1993-06-18 | 2007-05-23 | [
"hep-ph"
] | F.E. Close (Rutherford Appleton Lab. UK.) |
hep-ph/9306284 | Level-Crossing in the Instanton-Anti-Instanton Valley | We study the level crossing of the fermion system described by the euclidean
Dirac Hamiltonian in the valley background.
One chiral fermion level is shown to cross twice the zero value in the case
of well-separated instanton-anti-instanton background.
Below a critical separation, however, level crossings are absent... | 1993-06-17 | 2009-10-22 | [
"hep-ph"
] | R. Guida, K. Konishi and N. Magnoli |
hep-ph/9306280 | Collider Jets in Perturbation Theory | Recent progress in the perturbative analysis of hadronic jets, especially in
the context of hadron colliders, is discussed. The characteristic feature of
this work is the emergence of a level of precision in the study of the strong
interactions far beyond that previously possible. Inclusive cross sections for
high ener... | 1993-06-17 | 2007-05-23 | [
"hep-ph"
] | S.D. Ellis |
hep-ph/9306283 | Massive Neutrinos as Probe of Higher Unification | There are strong indications for neutrino masses and mixings in the data on
solar neutrinos as well as in the observed deficit of muon neutrinos from the
atmosphere. The COBE data and other analysis of the large scale structure in
the Universe also seems to require a hot component in the universe's dark
matter, which c... | 1993-06-17 | 2007-05-23 | [
"hep-ph"
] | R.N.Mohapatra (Department of Physics,University of Maryland, College
Park,Md) |
hep-ph/9306282 | Chooz and Perry: New Experiments for Long Baseline Reactor Neutrino
Oscillations | We discuss the Chooz experiment, a long baseline search for neutrino vacuum
oscillations, which will utilize a large gadolinium-loaded liquid scintillation
detector one km from a large nuclear power station in France. The 300-meter
(water equivalent) underground site of the detector reduces cosmic ray muons,
the main s... | 1993-06-17 | 2007-05-23 | [
"hep-ph"
] | R.I. Steinberg (Drexel University) |
hep-ph/9306281 | The Phenomenological Viability of Top Condensation | We discuss how the full dynamics of top condensation models can modify the
relations between the physical top mass, the amount of custodial $SU(2)$
violation and the weak gauge boson masses. It is emphasized that it is possible
to get phenomenologically acceptable relations between $\Delta\rho$, $m_t$ and
$M_W$ and tha... | 1993-06-17 | 2007-05-23 | [
"hep-ph"
] | M. Lindner |
hep-ph/9306278 | Matter Induced Neutrino Decay: New Candidate for the Solution to the
Solar Neutrino Problrm | Effects of the dense matter can induce the neutrino decay even if neutrinos
are stable in vacuum. This is due to coherent interactions with matter which
lead to energy level-splitting between the neutrino and antineutrino states and
thereby provide available phase space for the majoron emission. We show that
the matter... | 1993-06-16 | 2007-05-23 | [
"hep-ph"
] | Zurab G. Berezhiani and Anna Rossi |
hep-ph/9306279 | Supersymmetry Phenomenology | We review some recent results and future prospects in the phenomenology of
Supersymmmetry. We discuss the searches for superpartner states, the searches
for Higgs bosons in the minimal SUSY model, and additional parameter
constraints arising in SUSY-GUT models. | 1993-06-16 | 2007-05-23 | [
"hep-ph"
] | V. Barger and R.J.N. Phillips |
hep-ph/9306275 | Thermal Pions | I discuss the absorption and dispersion of pions in hot matter. A two-loop
calculation in the framework of chiral perturbation theory is presented and its
result is compactly written in terms of the two- and three-particle forward
$\pi \pi$ scattering amplitudes. At modest temperatures, $T \le 100$ MeV, the
change in t... | 1993-06-15 | 2009-10-22 | [
"hep-ph",
"nucl-th"
] | Ulf-G. Mei{\ss}ner |
hep-ph/9306277 | Combining Chiral and Heavy Quark Symmetries | The chiral and heavy quark symmetries of QCD are reviewed. These symmetries
are used to predict some low-momentum properties of hadrons containing a single
heavy quark. (Lectures given at the CCAST Symposium on Particle Physics at the
Fermi Scale May27-June4,1993) | 1993-06-15 | 2007-05-23 | [
"hep-ph"
] | Mark B. Wise |
hep-ph/9306276 | Inverse Neutrinoless Double $\beta$-Decay at the NLC? | The NLC may allow us to search for the `inverse' process to neutrinoless
double-$\beta$ decay, $e^-e^-\to W^-W^-$, which probes the existence of
Majorana masses for neutrinos. Expectations for the observation of this process
in both the Standard Model and its extension, the Left-Right Symmetric Model,
are examined. (Ta... | 1993-06-15 | 2007-05-23 | [
"hep-ph"
] | T.G. Rizzo |
hep-ph/9306269 | Non-perturbative unification in the light of LEP results | We consider an alternative to conventional GUTs originally proposed by
Maiani, Parisi and Petronzio, where owing to the existence of extra fermion
generations at some intermediate scale, the gauge couplings become large at
high energies. We first comment on how the non- supersymmetric version of this
scenario is ruled ... | 1993-06-14 | 2015-06-25 | [
"hep-ph"
] | B.Brahmachari, U. Sarkar and K. Sridhar |
hep-ph/9306271 | Using $b$-Tagging to Detect $t\anti t$~Higgs Production with Higgs$\rta
b\anti b$ | We demonstrate that expected efficiencies and purities for $b$-tagging at
SSC/LHC detectors may allow detection of the Standard Model Higgs in $t\anti t
\hsm$ production, with $\hsm\rta b\anti b$ decay, for $80\lsim\mhsm\lsim
130\gev$, provided $\mt\gsim 130\gev$. | 1993-06-14 | 2009-10-22 | [
"hep-ph"
] | J. Dai, J.F. Gunion and R. Vega |
hep-ph/9306270 | Higgs Bosons: Intermediate Mass Range at e+e- Colliders | We elaborate on the production of the Standard Model Higgs particle at
high-energy $e^+e^-$ colliders through the reaction $e^+e^- \rightarrow ZH$.
Particular emphasis is put on the intermediate mass range. In addition to the
signal we discuss in detail the background processes. Angular distributions
which are sensitiv... | 1993-06-14 | 2009-09-15 | [
"hep-ph"
] | V. Barger, K. Cheung, A. Djouadi, B.A. Kniehl and P.M. Zerwas |
hep-ph/9306272 | Nonequilibrium Quantum Field Kinetics | Using the general framework of nonequilibrium statistical mechanics for
relativistic quantum field systems we derive the basic equations of quantum
field kinetics. The main aim of the approach is calculation of observables
associated with quark-gluon plasma which is out of thermal and chemical
equilibrium. We show that... | 1993-06-14 | 2007-05-23 | [
"hep-ph"
] | A. Makhlin |
hep-ph/9306274 | Real photons from nonequilibrium QGP | We calculate the rate of the emission of the photons from the QGP. We base on
the real-time kinetic approach [1] without an explicit assumption about a
complete thermal equilibrium in the emitting system.
( Figures can be obtained from the author ) | 1993-06-14 | 2007-05-23 | [
"hep-ph"
] | A. Makhlin |
hep-ph/9306273 | Heavy dileptons from nonequilibrium QGP | The rate of emission of heavy dileptons from QGP is found without an
assumption of its complete thermal equilibrium. We base on the real-time
quantum field kinetic approach [1] and use the expansion up to the second order
with respect to strong coupling constant $g$. The final answer is not free from
the collinear sing... | 1993-06-14 | 2007-05-23 | [
"hep-ph"
] | A. Makhlin |
hep-ph/9306268 | The Weinberg Angle Without Grand Unification | We assume that strong and electroweak interactions become strong at very high
energies. With this assumption, we compute the low-energy gauge coupling
constants $\alpha_i (m_Z)$ as a function of the cutoff scale, taking the
supersymmetric standard model with $3+2n$ families of quark and lepton
multiplets. We find that ... | 1993-06-12 | 2009-09-29 | [
"hep-ph"
] | T. Moroi, Hitoshi Murayama and T. Yanagida |
hep-ph/9306262 | Limits on the Bess Model at NLC | Invited talk at the ``Workshop on Physics and Experiments at Linear e+e-
Colliders'', Waikoloa, Hawaii, April 26-30, 1993 (presented by D. Dominici) | 1993-06-11 | 2007-05-23 | [
"hep-ph"
] | R. Casalbuoni, S. De Curtis, D. Dominici, P. Chiappetta, A. Deandrea
and R. Gatto |
hep-ph/9306266 | First Corrections to Hyperfine Splitting and Lamb Shift Induced by
Diagrams with Two External Photons and Second Order Radiative Insertions in
the Electron Line | Contributions to HFS and to the Lamb shift intervals of order
$\alpha^2(Z\alpha)^5$ induced by graphs with two radiative photons inserted in
the electron line are considered. It is demonstrated that this last gauge
invariant set of diagrams which are capable of producing corrections of
considered order consists of nine... | 1993-06-11 | 2014-11-17 | [
"hep-ph"
] | Michael I. Eides, Savely G. Karshenboim and Valery A. Shelyuto |
hep-ph/9306261 | The Anatomy of eps'/eps Beyond Leading Logarithms with Improved Hadronic
Matrix Elements | Results of a recent calculation of the effective $\dS$ Hamiltonian at the
next-to-leading order will be presented\footnote{Work done in collaboration
with A. J. Buras and M. E. Lautenbacher.}. These, together with an improved
treatment of hadronic matrix elements, are used to evaluate the measure for
direct CP-violatio... | 1993-06-11 | 2007-05-23 | [
"hep-ph"
] | Matthias Jamin |
hep-ph/9306259 | The pion form factor: Sudakov suppressions and intrinsic transverse
momentum | It is demonstrated that any attempt to calculate the perturbative QCD
contribution to the pion form factor requires the inclusion of intrinsic
transverse momentum besides Sudakov form factors. For momentum transfers of the
order of a few GeV the intrinsic transverse momentum leads to a substantial
suppression of the pe... | 1993-06-11 | 2009-10-22 | [
"hep-ph"
] | R. Jakob and P. Kroll |
hep-ph/9306260 | Coherence and Decoherence in Radiation off Colliding Heavy Ions | We discuss the kinetics of a disoriented chiral condensate, treated as an
open quantum system. We suggest that the problem is analogous to that of a
damped harmonic oscillator. Master equations are used to establish a hierarchy
of relevant time scales. Some phenomenological consequences are briefly
outlined. | 1993-06-11 | 2009-10-22 | [
"hep-ph"
] | Andre Krzywicki |
hep-ph/9306257 | Higher Dimensional Operators and Low Energy Left-Right Symmetry | We consider higher dimensional operators due to quantum gravity or
spontaneous compactification of extra dimensions in Kaluza-Klein type theory
and their effect in the $SO(10)$ Lagrangian. These operators change the
boundary conditions at the unification scale. As a result one can allow
left-right symmetry to survive t... | 1993-06-11 | 2019-08-17 | [
"hep-ph"
] | Alakabha Datta, Sandip Pakvasa and Utpal Sarkar |
hep-ph/9306263 | The Search for Large Rapidity Gaps Between Jets by DZERO | We have searched for high Pt (>40 GeV/c) jet events in ppbar collisions at
the Fermilab TEVATRON (S**1/2 = 1800 GeV/c2) which have large pseudo-rapidity
differences between the jets and are consistent with zero particle production
from the underlying event. Preliminary analysis indicates that a significant
fraction of ... | 1993-06-11 | 2007-05-23 | [
"hep-ph"
] | G.E. Forden, DZERO Collaboration |
hep-ph/9306264 | Supersymmetric SU(3) X U(1) Gauge Model: Higgs Structure at the
Electroweak Scale | We consider a supersymmetric version of the recently proposed SU(3) X U(1)
extended gauge model. We show that it is possible to have only two Higgs
doublets at the SU(2) X U(1) energy scale but they are not those of the minimal
supersymmetric standard model. In particular, the upper bound on the lightest
scalar boson o... | 1993-06-11 | 2009-10-22 | [
"hep-ph"
] | T. V. Duong and Ernest Ma |
hep-ph/9306267 | Beyond S, T and U | The contribution to precision electroweak measurements due to TeV physics
which couples primarily to the $W^\pm$ and $Z$ bosons may be parameterized in
terms of the three `oblique correction' parameters, S, T and U. We extend this
parameterization to physics at much lower energies, $\ge 100$ GeV, and show
that in this ... | 1993-06-11 | 2014-05-16 | [
"hep-ph"
] | Ivan Maksymyk, C.P. Burgess and David London |
hep-ph/9306258 | SUSY at High Energy $e\gamma$ and $\gamma\gamma$ Colliders | We investigate the sparticle production processes $e\gamma\goto \sele\sz1$
and $\gamma\gamma\goto \sfermion\overline{\sfermion}$ at high energy $e\gamma$
and $\gamma\gamma$ colliders in the framework of the minimal supersymmetric
standard model (MSSM). It will be shown that the $e\gamma$ colliders would be
more suitabl... | 1993-06-11 | 2007-05-23 | [
"hep-ph"
] | Tadashi Kon |
hep-ph/9306265 | The Implications of Naturalness in Effective Field Theory on the Masses
of Resonances | Many years ago Weinberg formulated a definition of ``naturalness'' for
effective theories: if an effective theory is to make sense, coefficients must
not change too much when the cutoff scale is changed by a factor of order 1. As
an example, we consider simple field theories in which an $O(N)$ symmetry
spontaneously br... | 1993-06-11 | 2013-11-13 | [
"hep-ph"
] | Michael J. Dugan and Mitchell Golden |
hep-ph/9406284 | On the Determination of $|V_{ub}|$ from Inclusive Semileptonic Decay
Spectra | We propose a model independent method to determine $|V_{ub}|$ from the energy
spectrum of the charged lepton in inclusive semileptonic $B$ decays. The method
includes perturbative QCD corrections as well as nonperturbative ones. | 1993-06-11 | 2008-11-26 | [
"hep-ph"
] | Boris Blok and Thomas Mannel |
hep-ph/9306254 | Anomalous $WWZ$ couplings and $K_L\rightarrow \mu^+ \mu^-$ | We study contributions to $K_L \rightarrow \mu^+\mu^-$ from anomalous $WWZ$
interactions. There are, in general, seven anomalous couplings. Among the seven
anomalous couplings, only two of them contribute significantly. The others are
suppressed by factors like $m_s^2/M_W^2$, $m_d^2$, or $m_K^2/M_W^2$. Using the
experi... | 1993-06-10 | 2009-10-22 | [
"hep-ph"
] | Xiao-Gang He |
hep-ph/9310240 | Instanton-Like Transitions at High Energies in (1+1) Dimensional Scalar
Models | Instanton-like transitions (``shadow processes'') are considered in (1+1)
dimensional models with one scalar field whose potential is a quadratic well
with a cliff. The corresponding classical boundary value problem is solved, and
the semiclassical transition probabilities are found in a rather wide range of
energies a... | 1993-06-10 | 2010-11-01 | [
"hep-ph"
] | D.T.Son and V.A.Rubakov |
hep-ph/9306255 | Supersymmetry Breaking Threshold Corrections in the $SU(4)\times
SU(2)_L\times SU(2)_R$ Model | We evaluate the SUSY and top threshold effects in the context of the MSSM and
the string derived model based on SU(4)$\times$SU(2)$_L\times$SU(2)$_R$. In
both cases we run the two loop RGEs and determine the lower bounds of the
supersymmetric particle masses, dictated by the experimentally accepted regions
of the value... | 1993-06-10 | 2009-10-22 | [
"hep-ph"
] | O. Korakianitis and N.D. Tracas |
hep-ph/9306256 | The Strongly Interacting $WW$ System: Gold--Plated Modes | In this paper we survey the signals and backgrounds for a
strongly-interacting electroweak symmetry breaking sector at hadron
supercolliders in the TeV region. We study the process pp->WWX, and compute the
rates for the ``gold-plated'' channels, where W^{+/-}->l^{+/-}\nu and Z ->
l^+l^- (l = e,\mu), for a wide variety ... | 1993-06-10 | 2009-09-15 | [
"hep-ph"
] | J. Bagger, V. Barger, K. Cheung, J. Gunion, T. Han, G. A. Ladinsky, R.
Rosenfeld and C.--P. Yuan |
hep-ph/9306249 | Is the scalar meson seen in CELLO data on
$\gamma\gamma\rightarrow\pi^+\pi^-$ ? | We analyze the CELLO angular distributions
$\gamma\gamma\rightarrow\pi^+\pi^-$ with the unitary model \cite{KS-86} for
helicity 2 amplitude. In contrast to previous analysis \cite{CELLO} we do not
see any QED damping. The obtained S--wave does not contradict to low--energy
theorem and demonstrates more clealy the reson... | 1993-06-09 | 2007-05-23 | [
"hep-ph"
] | A.E.Kaloshin and V.M.Persikov |
hep-ph/9306252 | A Common Explanation for the Atmospheric, Solar-Neutrino and Double Beta
Decay Anomalies | We make a number of small changes, including correcting an error in our
heavy-neutrino decay rate. None of our analysis is changed, either in substance
or detail. | 1993-06-09 | 2009-10-22 | [
"hep-ph"
] | C.P. Burgess and Oscar Hernandez |
hep-ph/9306248 | New Signals for Gluinos and Squarks of Supergravity at the Tevatron
Collider | Within the supergravity framework, sleptons are expected to be considerably
lighter than squarks if gluinos and squarks are approximately degenerate. This
can lead to a significant enhancement in leptonic branching ratio for
neutralinos, and sometimes, charginos. Using ISAJET 7.0/ISASUSY 1.0, we
evaluate the multilepto... | 1993-06-09 | 2009-12-30 | [
"hep-ph"
] | H. Baer, C. Kao and X. Tata |
hep-ph/9306251 | $\mu$-$e$ conversion in nuclei and Z$^\prime$ physics | Together with the existence of new neutral gauge bosons, models based on
extended gauge groups (rank $> 4$) often predict also new charged fermions. A
mixing of the known fermions with new states with {\it exotic} weak-isospin
assignments (left-handed singlets and right-handed doublets) will induce tree
level flavour c... | 1993-06-09 | 2008-11-26 | [
"hep-ph"
] | J. Bernabeu, E. Nardi and D. Tommasini |
hep-ph/9306250 | Factorization of gravitational Compton scattering amplitude in the
linearized version of general relativity | Gravitational Compton scattering process with a massive fermion is studied in
the context of the linearized gravity. Gravitational gauge invariance and
graviton transversality cause the transition amplitude to be factorized into
that of scalar QED Compton scattering and that of fermion QED Compton
scattering with an ov... | 1993-06-09 | 2010-11-01 | [
"hep-ph"
] | S. Y. Choi, J. S. Shim, and H. S. Song |
hep-ph/9306253 | Rapidity gap signals in Higgs production at the SSC | We examine the structure of the underlying event in neutral Higgs production
at the Superconducting-Supercollider (SSC). Gaps, regions of rapidity
containing no soft particle production, can provide a clean signature for $W$
boson fusion to the heavy Higgs. We first examine the physical basis of gap
production and esti... | 1993-06-09 | 2011-05-12 | [
"hep-ph"
] | R.S. Fletcher (Bartol Research Institute, University of Delaware), T.
Stelzer (University of Wisconsin-Madison) |
hep-ph/9306243 | Spontaneous Breaking of Chiral Symmetry as a Consequence of Confinement | We show that at the leading order in the large-$N$ expansion a lattice QCD
motivated linear rising confinement potential at large distances leads to a
non-local four-quark interaction that realizes spontaneous breaking of chiral
symmetry (SBCS) in the same way the Nambu-Jona-Lasinio model does. The
dynamical quark mass... | 1993-06-08 | 2008-02-03 | [
"hep-ph"
] | A. N. Ivanov, N. I. Troitskaya, M. Faber, M. Schaler, M. Nagy |
hep-ph/9306246 | Vector Particle Interactions In the Quasipotential Approach | The composite system, formed by two $S=1$ particles, is considered. The field
operators of constituents are transformed on the $(1,0)\oplus (0,1)$
representation of the Lorentz group. The problem of interaction of $S=1$
particle with the electromagnetic field is also discussed. | 1993-06-08 | 2009-10-22 | [
"hep-ph",
"hep-th"
] | Valeri V. Dvoeglazov and Sergei V. Khudyakov |
hep-ph/9306245 | Mass Scales and Stability of the Proton in [SU(6)]$^{3}\times$Z$_{3}$ | We proof that the proton is stable in the left-right symmetric gauge model
[SU(6)]$^3\times$Z$_3$, which unifies nongravitational forces with flavors,
broken spontaneously by a minimal set of Higgs Fields and Vacuum Expectation
Values down to SU(3)$_{c}\otimes$U(1)$_{EM}$\hspace{0.2cm} . We also compute
the evolution o... | 1993-06-08 | 2007-05-23 | [
"hep-ph"
] | William A. Ponce, Arnulfo Zepeda and Juan B. Fl\'orez |
hep-ph/9306247 | The Impact of COBE on Inflation, Dark Matter, and Structure Formation: a
Brief Review | The COBE results, to be followed in the near future by other Cosmic Microwave
Background measurements, are providing us with a new fundamental tool to probe
the formation of large scale structure in the Universe, and in so doing to
constrain our models of the early universe and the nature of dark matter. I
describe bri... | 1993-06-08 | 2007-05-23 | [
"hep-ph",
"astro-ph"
] | Lawrence M. Krauss |
hep-ph/9306244 | Light gluinos in high-Q2 deep inelastic scattering | A slight incompatibility in recent low-energy and high-energy \alpha_s
measurements can be interpreted as evidence for new light colour degrees of
freedom. Assuming that these are the gluinos of a supersymmetric extension of
the Standard Model, we investigate to what extent they change the standard QCD
predictions for ... | 1993-06-08 | 2009-10-22 | [
"hep-ph"
] | W.J. Stirling and R.G. Roberts |
hep-ph/9306235 | Cabibbo--Kobayashi--Maskawa Mixing in Superstring Derived Standard--like
Models | We examine the problem of three generation quark flavor mixing in realistic,
superstring derived standard--like models, constructed in the free fermionic
formulation. We study the sources of family mixing in these models and discuss
the necessary conditions to obtain a realistic Cabibbo--Kobayashi--Maskawa
(CKM) mixing... | 1993-06-07 | 2010-11-01 | [
"hep-ph"
] | Alon E. Faraggi and Edi Halyo |
hep-ph/9306234 | Scattering of very light charged particles | I advance arguments against the view that the Lee-Nauenberg-Kinoshita theorem
is relevant in practice to the scattering of charged particles as their mass
tends to zero. I also discuss the case of massive coloured particle scattering. | 1993-06-07 | 2010-11-01 | [
"hep-ph"
] | J C Taylor |
hep-ph/9306236 | Low Scale Technicolour at LEP | We discuss the phenomenology of an $SU(2)_{TC}$ technicolour model with a low
technicolour confinement scale ${\Lambda}_{TC} \sim 50-100 GeV$. Such a low
technicolour scale may give rise to the first hints of technicolour being seen
at LEPI and spectacular technicolour signals at LEPII. | 1993-06-07 | 2009-10-22 | [
"hep-ph"
] | Stephen F. King |
hep-ph/9306242 | Natural Suppression of Higgsino-Mediated Proton Decay in Supersymmetric
SO(10) | In supersymmetric Grand Unified Theories, proton decay mediated by the
color--triplet higgsino is generally problematic and requires some fine--tuning
of parameters. We present a mechanism which naturally suppresses such dimension
5 operators in the context of SUSY $SO(10)$. The mechanism, which implements
natural doub... | 1993-06-07 | 2011-05-12 | [
"hep-ph"
] | K.S. Babu and S.M. Barr |
hep-ph/9306241 | The Proton Spin and the Wigner Rotation | It is shown that in both the gluonic and strange sea explanations of the
Ellis-Jaffe sum rule violation discovered by the European Muon Collaboration
(EMC), the spin of the proton, when viewed in in its rest reference frame,
could by fully provided by quarks and antiquarks within a simple quark model
picture, taken int... | 1993-06-07 | 2009-10-22 | [
"hep-ph"
] | Bo-Qiang Ma and Qi-Ren Zhang |
hep-ph/9306240 | Dimensionally Regulated Pentagon Integrals | We present methods for evaluating the Feynman parameter integrals associated
with the pentagon diagram in 4-2 epsilon dimensions, along with explicit
results for the integrals with all masses vanishing or with one non-vanishing
external mass. The scalar pentagon integral can be expressed as a linear
combination of box ... | 1993-06-07 | 2010-11-15 | [
"hep-ph"
] | Z. Bern, L. Dixon, and D. A. Kosower |
hep-ph/9306238 | Real Time Analysis of Thermal Activation via Sphaleron Transitions | We study the process of thermal activation mediated by sphaleron transitions
by analyzing the real-time dynamics of the decay out of equilibrium in a $1+1$
dimensional field theory with a metastable state. The situation considered is
that of a rapid supercooling in which the system is trapped in a metastable
state at a... | 1993-06-07 | 2009-10-22 | [
"hep-ph",
"hep-th"
] | D. Boyanovsky and C. A. de Carvalho |
hep-ph/9306239 | Eigenmoments for Multifragmentation | Linear rate equations are used to describe the cascading decay of an initial
heavy cluster into fragments. Using a procedure inspired by the similar, but
continuous case of jet fragmentation in QCD, this discretized process may be
analyzed into eigenmodes, corresponding to moments of the distribution of
multiplicities.... | 1993-06-07 | 2008-11-26 | [
"hep-ph",
"nucl-th"
] | B.G.Giraud and R.Peschanski |
hep-ph/9306237 | Chiral Perturbation to One Loop Including the $\rho$ Meson | We formulate the chiral perturbation theory at the one loop level in the
effective lagrangian including the $\rho$ meson as a dynamical gauge boson of a
hidden local symmetry(HLS). The size of radiative correction to the
phenomenological parameter $a$ of HLS is estimated to be about $10$\%. The
complete list of ${\cal ... | 1993-06-07 | 2009-10-22 | [
"hep-ph"
] | Masaharu Tanabashi |
hep-ph/9306230 | The triple-pomeron regime and the structure function of the pomeron in
the diffractive deep inelastic scattering at very small x | Misprints and numerical coefficients corrected, a bit of phenomenology and
one figure added. The case for the linear evolution of the unitarized structure
functions made stronger. | 1993-06-06 | 2014-11-17 | [
"hep-ph"
] | N.N.Nikolaev (L.D.Landau Institute, Moscow and KFA, Juelich),
B.G.Zakharov (L.D.Landau Institute, Moscow) |
hep-ph/9306233 | A Variational Approach to Bound States in Quantum Field Theory | We consider here in a toy model an approach to bound state problem in a
nonperturbative manner using equal time algebra for the interacting field
operators. Potential is replaced by offshell bosonic quanta inside the bound
state of nonrelativistic particles. The bosonic dressing is determined through
energy minimisatio... | 1993-06-05 | 2009-10-22 | [
"hep-ph"
] | H. Mishra and S.P. Misra |
hep-ph/9306231 | Octet Baryons at Finite Temperature: QCD Sum Rules vs. Chiral Symmetry | Correlators of the octet baryons in the hot pion gas are studied in the
framework of the QCD sum rule. The condensates appearing in the OPE side of the
correlators become T-dependent through the interaction with thermal pions. We
present an explicit demonstration that the $O(T^2)$-dependence of the
condensates is compl... | 1993-06-05 | 2009-10-22 | [
"hep-ph",
"nucl-th"
] | Yuji Koike |
hep-ph/9306232 | Chiral Symmetry Breaking and Pion Wave Function | We consider here chiral symmetry breaking through nontrivial vacuum structure
with quark antiquark condensates. We then relate the condensate function to the
wave function of pion as a Goldstone mode. This simultaneously yields the pion
also as a quark antiquark bound state as a localised zero mode in vacuum. We
illust... | 1993-06-05 | 2009-10-22 | [
"hep-ph"
] | H. Mishra and S. P. Misra |
hep-ph/9306225 | (Para)bosons, (para)fermions, quons and other beasts in the menagerie of
particle statistics | After some general comments about statistics and the TCP theorem, I discuss
experimental searches for violations of the exclusion principle and theories
which allow for such violations. | 1993-06-04 | 2007-05-23 | [
"hep-ph",
"hep-th"
] | O.W. Greenberg, D.M. Greenberger and T.V. Greenbergest |
hep-ph/9306229 | Searching for Leptoquarks in electron-photon Collisions | We study the production of composite scalar leptoquarks in $e\gamma$
colliders, and we show that an $e^+e^-$ machine operating in its $e\gamma$ mode
is the best way to look for these particles in $e^+e^-$ collisions, due to the
hadronic content of the photon. | 1993-06-04 | 2009-10-22 | [
"hep-ph"
] | O.J.P. Eboli, E.M. Gregores, M.B.Magro, P.G. Mercadante and S.F.
Novaes |
hep-ph/9306224 | $\pi^+$ and $\pi^0$ Polarizabilities from
{$\gamma\gamma\rightarrow\pi\pi$} Data on the Base of S-Matrix Approach | We suggest the most model-independent and simple description of the
$\gamma\gamma\rightarrow\pi\pi$ process near threshold in framework of S-matrix
approach. The amplitudes contain the pion polarizabilities and rather
restricted information about $\pi \pi$ interaction. Application of these
formulae for description of M... | 1993-06-04 | 2015-06-25 | [
"hep-ph"
] | A.E.Kaloshin and V.V.Serebryakov |
hep-ph/9306227 | Decay Rate of a Positronium. Review of Theory and Experiment | The present status of theoretical and experimental investigations of the
decay rate of a positronium is considered. The increasing interest to this
problem has been caused by the disagreement of the calculated value of
$\Gamma_3 (o-Ps)$ and the recent series of precise experiments. The necessity
of new calculations on ... | 1993-06-04 | 2009-10-22 | [
"hep-ph"
] | Valeri V. Dvoeglazov, Rudolf N. Faustov and Yuri N. Tyukhtyaev |
hep-ph/9306226 | Towards a unified string supergravity model | We present a unified string supergravity model based on a string-derived
$SU(5)\times U(1)$ model and a string-inspired supersymmetry breaking scenario
triggered by the $F$-term of the universally present dilaton field. This model
can be described by three parameters: $m_t$, $\tan\beta$, and $m_{\tilde g}$.
We work out... | 1993-06-04 | 2009-08-25 | [
"hep-ph"
] | J. Lopez, D. Nanopoulos, and A. Zichichi |
hep-ph/9306228 | Schoonschip '91 | The symbolic manipulation program Schoonschip is being made freely available
for a number of computers with Motorola 680x0 cpu's. It can run on machines
with relatively modest memory and disk resources, and is designed to run as
fast as possible given the host constraints. Memory and disk utilization can be
adapted to ... | 1993-06-04 | 2008-02-03 | [
"hep-ph"
] | M. Veltman, D.N. Williams |
hep-ph/9306222 | Long Range Forces from the Cosmological Neutrino Background | The cosmological neutrino background will mediate long range forces between
objects. For a background of temperature T, the potential decreases as 1/r^5
for r >> 1/T and as 1/r for r << 1/T. These forces have large spin-dependent
components. If the neutrino background is nonrelativistic, the long range
forces are enhan... | 1993-06-03 | 2009-10-22 | [
"hep-ph",
"astro-ph"
] | C.J. Horowitz and J. Pantaleone |
hep-ph/9306217 | Coherence effects in the current fragmentation region at HERA | The structure of the hadronic final state in deep inelastic scattering at
HERA is studied on the level of the Monte Carlo event generator. Special
emphasis is given to the colour coherence phenomenon in the current
fragmentation region. It is shown that results of perturbative QCD recently
tested in $e^+e^-$ annihilati... | 1993-06-03 | 2011-04-15 | [
"hep-ph"
] | K.Charchula |
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