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/9311210 | Evaluating Sums over the Matsubara Frequencies | Perturbative calculations in field theory at finite temperature involve sums
over the Matsubara frequencies. Besides the usual difficulties that appear in
perturbative computations, these sums give rise to some new obstacles that are
carefully analized here. I present a fast and realible recipe to work out sums
over th... | 1993-11-02 | 2009-10-22 | [
"hep-ph"
] | Agustin Nieto |
hep-ph/9311214 | Solar Model Uncertainties, MSW Analysis, and Future Solar Neutrino
Experiments | Various theoretical uncertainties in the standard solar model and in the
Mikheyev-Smirnov-Wolfenstein (MSW) analysis are discussed. It is shown that two
methods of estimating the solar neutrino flux uncertainties are equivalent: (a)
a simple parametrization of the uncertainties using the core temperature and
the nuclea... | 1993-11-02 | 2016-09-01 | [
"hep-ph",
"astro-ph"
] | Naoya Hata and Paul Langacker |
hep-ph/9311217 | Ideas in Nonperturbative QCD | The structure of the hadron spectrum is discussed in connection with the main
phenomena of nonperturbative QCD: confinement and chiral symmetry breaking
(CSB). For the higher part of the spectrum ($M \ge 2 GeV$) spin and chiral
effects are unimportant; spectrum of $q\bar{q}$ system is described by an
effective Hamilton... | 1993-11-02 | 2009-07-28 | [
"hep-ph"
] | Yu.A.Simonov |
hep-ph/9311209 | Issues in Light Hadron Spectroscopy | A high priority in light spectroscopy is to seek out and characterize various
types of non-$(Q\bar{Q}$) meson. The large quantity of new data now appearing
will present a great opportunity. To identify the non-$(Q\bar{Q}$) intruders
one needs to know the regular $(Q\bar{Q}$) pattern well; whole meson families
thus beco... | 1993-11-02 | 2010-11-01 | [
"hep-ph"
] | D. Morgan (RAL,UK) |
hep-ph/9311207 | $b \rightarrow s \gamma$ and $\epsilon_b$ Constraints on Two Higgs
Doublet Model | We perform a combined analysis of two stringent constraints on the 2 Higgs
doublet model, one coming from the recently announced CLEO II bound on $B(b
\rightarrow s \gamma)$ and the other from the recent LEP data on $\epsilon_b$.
We have included one-loop vertex corrections to $Z \rightarrow b \overline b$
through $\ep... | 1993-11-02 | 2009-10-22 | [
"hep-ph"
] | Gye T. Park |
hep-ph/9311206 | Weak Decays Of Charm Hadrons: The Next Lesson On QCD -- And Possibly
More! | Second-generation theoretical technologies -- heavy quark expansions, QCD sum
rules and QCD simulations on the lattice -- are arriving on the scene, allowing
a treatment of charm decays that is genuinely based on QCD. The availability of
those theoretical tools strengthens the case for the need for comprehensive
precis... | 1993-11-01 | 2007-05-23 | [
"hep-ph"
] | I.I.Bigi |
hep-ph/9311202 | Charged Particle Scattering from Electroweak and Semi-Local Strings | The scattering of a charged fermion from an electroweak or semi-local string
is investigated and a full solution obtained for both massive and massless
cases. For the former, with fractional string flux, there is a helicity
conserving and helicity-flip cross-section, of equal magnitude and of a
modified Aharonov-Bohm f... | 1993-11-01 | 2019-08-17 | [
"hep-ph"
] | A.C.Davis, A.P.Martin and N.Ganoulis |
hep-ph/9310379 | The 1/N Expansion for Baryons | A systematic expansion in 1/N is constructed for baryons in QCD. Predictions
of the 1/N expansion at leading and subleading order for baryon axial current
coupling constant ratios such as F/D, baryon masses and magnetic moments are
derived. The baryon sector of QCD has a light quark spin-flavor symmetry at
leading orde... | 1993-11-01 | 2014-11-17 | [
"hep-ph"
] | Roger Dashen, Elizabeth Jenkins, and Aneesh V. Manohar |
hep-ph/9311201 | Small $x$ and Small $Q^2$ | I discuss (i) hadron-hadron and photon-hadron total cross-sections, (ii)
elastic scattering, (iii) the r\^{o}le of minijets in total cross-sections and
the need to include them in Monte-Carlos for small-$x$ structure functions,
(iv) how the two pomerons affect small-$x$ behaviour, and (v) rapidity-gap
physics. | 1993-11-01 | 2007-05-23 | [
"hep-ph"
] | P V Landshoff |
hep-ph/9311203 | Global Strings and the Aharonov-Bohm Effect | When a fermion interacts with a global vortex or cosmic string a solenoidal
"gauge" field is induced. This results in a non-trivial scattering
cross-section. For scalars and non-relativistic fermions the cross-section is
similar to that of Aharonov and Bohm, but with corrections. A cosmological
example is compared to o... | 1993-11-01 | 2009-10-22 | [
"hep-ph",
"cond-mat"
] | A.C.Davis and A.P.Martin |
hep-ph/9311205 | Gluon Distribution Functions for Very Large Nuclei at Small Transverse
Momentum | We show that the gluon distribution function for very large nuclei may be
computed for small transverse momentum as correlation functions of an
ultraviolet finite two dimensional Euclidean field theory. This computation is
valid to all orders in the density of partons per unit area, but to lowest
order in $\alpha_s$. T... | 1993-11-01 | 2009-10-22 | [
"hep-ph",
"nucl-th"
] | Larry McLerran and Raju Venugopalan |
hep-ph/9310380 | Penguin Effects on K Pi and PiPi Decays of the $B$ Meson | We give the detailed analyses for the gluonic-penguin effect on the $\kp$ and
$\pp$ decays of the $B$ meson. In the standard model, it is shown that the
ratio $BR(B\A\kp)/BR(B\A\pp)$ takes the value $0.5\sim 3.0$ with the strongly
depending on the CP violating phase $\phi$ and the KM matrix element
$|V_{ub}|$. We obtai... | 1993-11-01 | 2010-11-01 | [
"hep-ph"
] | Takemi Hayashi, Masahisa Matsuda and Morimitsu Tanimoto |
hep-ph/9311204 | Neutrinoless Double Beta Decay and the Solar Neutrino Problem | The MSW or vacuum oscillation solution of the solar neutrino problem can be
reconciled with possible existence of the $(\beta\beta)_{0\nu}$ decay with a
half-life corresponding to an effective Majorana mass of the electron neutrino
$|m_{ee}| \cong (0.1 - 1.0)~$eV. The phenomenological consequences of such a
possibility... | 1993-11-01 | 2009-10-22 | [
"hep-ph"
] | S. T. Petcov and A. Yu. Smirnov |
hep-ph/9310378 | The alpha_s^3 correction to Gamma (Z^0 -> hadrons) | We present the alpha_s^3 correction to the Z^0 decay rate into hadrons in the
limit m_top >> m_Z. | 1993-10-30 | 2009-10-22 | [
"hep-ph"
] | S.A. Larin, T. van Ritbergen, J.A.M. Vermaseren |
hep-ph/9310372 | On the Higher Order Corrections to Heavy Quark Effective Theory | We show that the different ways of deriving the Heavy Quark Effective Theory
(HQET) lead to equivalent theories. The equivalence can be established through
a careful redefinition of the field variables. We demonstrate the equivalence
to order ${1 \over m^5}$ in the presence of a constant electric field. | 1993-10-29 | 2015-06-25 | [
"hep-ph"
] | Ashok Das |
hep-ph/9310371 | Natural Doublet-Triplet Splitting in Supersymmetric SO(10) Model | We construct a supersymmetric SO(10) model, where natural doublet-triplet
splitting implemented via the Dimopoulos-Wilczek mechanism is stable under the
addition of 126+\bar{126} Higgs superfields needed to generate the small
neutrino masses via the see-saw mechanism and where both the charged fermion
and neutrino mass... | 1993-10-29 | 2009-10-22 | [
"hep-ph"
] | Dae Gyu Lee and R.N.Mohapatra (University of Maryland, College Park) |
hep-ph/9310374 | Spontaneous Breaking of R parity in the Minimal Supersymmetric Standard
Model Revisited | We reconsider the possibility of spontaneous breaking of $R$ parity in the
Minimal Supersymmetric Standard Model. By a renormalization group analysis we
find the parameter space in which a sneutrino gets a vacuum expectation value,
leading to the spontaneous breaking of the lepton number and to the appearance
of a phen... | 1993-10-29 | 2009-10-22 | [
"hep-ph"
] | D. Comelli, A. Masiero, M. Pietroni and A. Riotto |
hep-ph/9310370 | Magnetic Monopoles in the Einstein-Yang-Mills-Higgs System | We study the Yang-Mills-Higgs system within the framework of general
relativity. In the static situation, using Bogomol'nyi type analysis, we derive
a positive-definite energy functional which has a lower bound. Specializing to
the gauge group $SU(2)$ and the t'Hooft-Polyakov ansatz for the gauge and Higgs
fields, we s... | 1993-10-29 | 2010-11-01 | [
"hep-ph",
"hep-th"
] | Nguyen Ai Viet and Kameshwar C. Wali |
hep-ph/9310373 | Nonperturbative Decoupling and Effective Field Theory | We examine recent claims that nonperturbative effects can prevent the
decoupling of a heavy fermion whose mass arises from a Yukawa coupling to a
scalar field. We show that in weakly coupled, four dimensional models such as
the standard model with heavy mirror fermions the effects of the heavy fermions
can always be ac... | 1993-10-29 | 2009-10-22 | [
"hep-ph",
"hep-lat",
"hep-th"
] | Stephen D.H. Hsu |
hep-ph/9310375 | Asymmetry of the Missing Momentum Distribution in (e,e$'$p) Reactions
and Color Trnasparency | We suggest the measurement of the integrated asymmetry of teh missing
momentum distribution in (e,e$'$p)reactions to check color transparency effects
at intermediate momentum transfers. | 1993-10-29 | 2009-10-22 | [
"hep-ph"
] | A. Bianconi, S. Boffi and D.E. Kharzeev |
hep-ph/9310376 | Final-state \pi\pi interactions in
\Upsilon(3S)\rightarrow\Upsilon(1S)\pi\pi | The $m_{\pi\pi}$ spectrum and various angular distributions in $\upss$ are
studied including the effects of the $\pi\pi$ phase shift in the $I=L=0$
channel using the lowest order amplitude in the pion momentum expansion. Our
results are compared with the recent CLEO data, and we find good agreement
except for the $\cos... | 1993-10-29 | 2009-10-22 | [
"hep-ph"
] | Sumantra Chakravarty, Sun Myong Kim, and Pyungwon Ko |
hep-ph/9310377 | Hadron and Quark Form Factors in the Relativistic Harmonic Oscillator
Model | Nucleon, pion and quark form factors are studied within the relativistic
harmonic oscillator model including the quark spin. It is shown that the
nucleon charge, magnetic and axial form factors and the pion charge form factor
can be explained with one oscillator parameter if one accounts for the scaling
rule and the si... | 1993-10-29 | 2010-12-17 | [
"hep-ph"
] | V.V. Burov, A. De Pace, S.M. Dorkin and P. Saracco |
hep-ph/9310369 | Baryons from Quarks in the $1/N$ Expansion | We present a diagrammatic analysis of baryons in the $1/N$ expansion, where
$N$ is the number of QCD colors. We use this method to show that there are an
infinite number of degenerate baryon states in the large-$N$ limit. We also
show that forward matrix elements of quark bilinear operators satisfy the
static quark-mod... | 1993-10-28 | 2009-10-22 | [
"hep-ph",
"nucl-th"
] | Markus A. Luty and John March-Russell |
hep-ph/9310368 | Neutrino Masses and Mixing | Restrictions on the neutrino masses and lepton mixing are reviewed. Solar,
atmospheric and relic neutrinos give the indications of existence of nonzero
neutrino masses and mixing. The data pick up two regions of mixing angles which
are or appreciably larger or appreciably smaller than the Cabibbo angle. Some
theoretica... | 1993-10-28 | 2009-09-25 | [
"hep-ph"
] | Alexei Yu. Smirnov |
hep-ph/9310365 | On Spin Independence in Large $N_c$ Baryons | We argue directly from Witten's analysis of large $N_c$ baryons that the
structure of the $s$-wave low-spin baryon states in QCD becomes
spin-independent as $N_c\rightarrow\infty$. This property leads to $SU(6)$-like
behavior of static matrix elements, such as the axial-vector current matrix
elements recently studied b... | 1993-10-28 | 2009-09-11 | [
"hep-ph"
] | Chris Carone, Howard Georgi and Sam Osofsky |
hep-ph/9310366 | Particle Astrophysics from the Particle Perspective | In this talk I discuss several topics at the interface of particle physics
and astrophysics/cosmology. These include the problem of dark matter and two
popular dark matter candidates: axions and neutralinos. I also discuss briefly
some recent developments in electroweak baryogenesis, as well as a variety of
somewhat mo... | 1993-10-28 | 2015-06-25 | [
"hep-ph"
] | Michael Dine |
hep-ph/9310367 | Four Fermion Processes at Future $e^+e^-$ Colliders as a Probe of New
Resonant Structures | Possible oblique effects from vector particles that are strongly coupled to
the known gauge bosons are calculated for the case of final hadronic states
produced at future $e^+e^-$ colliders, using a formalism that was recently
proposed and that exploits the information and the constraints provided by LEP
1 results. Com... | 1993-10-28 | 2019-08-17 | [
"hep-ph"
] | J. Layssac, F.M. Renard, C.Verzegnassi |
hep-ph/9310355 | Anomalies, VMD and the Enjl Model | We show how the effective action of the Extended Nambu--Jona-Lasinio model
(ENJL) can be defined in the presence of anomalies in a way that reproduces the
flavour anomaly. This necessarily breaks Vector Meson Dominance (VMD) in the
usual sense. The same method can be used to construct other chiral effective
theories in... | 1993-10-27 | 2011-03-31 | [
"hep-ph",
"nucl-th"
] | Johan Bijnens and Joaquim Prades |
hep-ph/9310361 | Vector Leptoquark Production at Hadron Colliders | We explore the production of vector leptoquarks ($V$) at the Tevatron, LHC,
and SSC through both quark-antiquark and gluon fusion: $q \bar q, gg \to VV$.
The cross sections are found to be somewhat larger than for scalar leptoquarks
of the same mass implying enhanced search capabilities. Contributed to the
Workshop on ... | 1993-10-27 | 2007-05-23 | [
"hep-ph"
] | J. Hewett, T. Rizzo, S. Pakvasa, H. Haber, and A. Pomarol |
hep-ph/9310357 | Deep Inelastic Scattering Beyond Perturbation Theory | I discuss possibilities to observe the instanton-induced contributions to
deep inelastic scattering which correspond to nonperturbative exponential
corrections to the coefficient functions in front of parton distributions of
the leading twist. | 1993-10-27 | 2007-05-23 | [
"hep-ph"
] | V.M Braun |
hep-ph/9310359 | $\chi_{c2} \to \rho\rho$ Decay and the $\rho$ Polarization in Inclusive
Processes: A Test of Mass Effects | We compute the helicity density matrix of $\rho$ vector mesons produced in
the two-body decays of $\chi_{c2}$'s in the framework of perturbative QCD,
allowing for mass corrections. The $\chi_{c2}$'s are inclusively produced in
hadronic interactions via gluon fusion and are shown to be strongly polarized.
Both the case ... | 1993-10-27 | 2009-10-22 | [
"hep-ph"
] | M. Anselmino and F. Murgia |
hep-ph/9310358 | Reduction of general two-loop self-energies to standard scalar integrals | We present a method for reducing general two-loop self-energies to standard
scalar integrals in massive gauge theories with special emphasis on the
electroweak Standard Model. It includes the tensor integral reduction for all
two-loop integrals appearing in self-energy calculations. The results are valid
for arbitrary ... | 1993-10-27 | 2009-10-22 | [
"hep-ph"
] | G. Weiglein, R. Scharf, M. B\"ohm |
hep-ph/9310363 | Constraints on Three-Neutrino Mixing from Atmospheric and Reactor Data | Observations of atmospheric neutrinos are usually analyzed using the
simplifying approximation that either \(\nu_\mu \leftrightarrow \nu_\tau\) or
\(\nu_e \leftrightarrow \nu_\mu\) two-flavor mixing is relevant. Here we
instead consider the data using the simplifying approximation that only one
neutrino mass scale is r... | 1993-10-27 | 2009-12-30 | [
"hep-ph"
] | J. Pantaleone |
hep-ph/9310362 | Light-Quark, Heavy-Quark Systems: An Update | We review many of the recently developed applications of Heavy Quark
Effective Theory techniques. After a brief update on Luke's theorem, we
describe striking relations between heavy baryon form factors, and how to use
them to estimate the accuracy of the extraction of $|V_{cb}|$. We discuss
factorization and compare w... | 1993-10-27 | 2009-09-25 | [
"hep-ph"
] | Benjamin Grinstein |
hep-ph/9310354 | Collective Fields for QCD | A gauge-symmetric approach to effective Lagrangians is described with special
emphasis on derivations of effective low-energy Lagrangians from QCD. The
examples we discuss are based on exact rewritings of cut-off QCD in terms of
new collective degrees of freedom. These cut-off Lagrangians are thus
``effective'' in the ... | 1993-10-27 | 2007-05-23 | [
"hep-ph"
] | P.H. Damgaard, H.B. Nielsen and R. Sollacher |
hep-ph/9310364 | Nonperturbative Matching for Field Theories with Heavy Fermions | We examine a paradox, suggested by Banks and Dabholkar, concerning
nonperturbative effects in an effective field theory which is obtained by
integrating out a generation of heavy fermions, where the heavy fermion masses
arise from Yukawa couplings. They argue that light fermions in the effective
theory appear to decay ... | 1993-10-27 | 2009-09-11 | [
"hep-ph",
"hep-th"
] | H. Georgi, L. Kaplan, and D. Morin |
hep-ph/9310360 | Recent Developments in the Theory of Heavy Quarks | Recent developments in the theory of heavy quarks are reviewed. In the area
of heavy quark fragmentation, there has been progress in the study of both
pertubative and nonperturbative processes, including the identification of new
observable nonperturbative fragmentation parameters. There has also been
considerable theo... | 1993-10-27 | 2008-02-03 | [
"hep-ph"
] | Adam F. Falk |
hep-ph/9310356 | The Determination of $|\Vcb|$ and QCD Sum Rules in Hqet | I review recent developments in Heavy Quark Effective Theory (HQET) that lead
to an almost model--independent determination of the $|\Vcb|$ element of the
Cabibbo--Kobayashi--Maskawa matrix from exclusive semileptonic $B\ra D^{(*)}$
decays. In particular, I compare the theoretical uncertainties in the $B\ra
D^*\ell\,\b... | 1993-10-27 | 2007-05-23 | [
"hep-ph"
] | Zoltan Ligeti |
hep-ph/9310349 | Closing the Windows on Mev Tau Neutrinos | In this note, we analyze various constraints on the ``visible'' decay modes
of a massive $\tau $ neutrino, $\nu_\tau\rightarrow\nu^\prime\,\gamma $ and
$\nu_\tau\rightarrow\nu^\prime\, e^+ e^-$, where $\nu^\prime$ is a light
neutrino. The BEBC beam dump experiment provides model-independent constraints
on these modes. ... | 1993-10-26 | 2008-11-26 | [
"hep-ph"
] | K.S. Babu, T.M. Gould, and I.Z. Rothstein |
hep-ph/9310350 | Improving the Weizs\"acker-Williams Approximation in Electron-Proton
Collisions | We critically examine the validity of the Weizs\"acker-Williams approximation
in electron-hadron collisions. We show that in its commonly used form it can
lead to large errors, and we show how to improve it in order to get accurate
results. In particular, we present an improved form that is valid beyond the
leading log... | 1993-10-26 | 2011-01-25 | [
"hep-ph"
] | S. Frixione, M. L. Mangano, P. Nason and G. Ridolfi |
hep-ph/9310352 | Neutrino Mixing and Future Solar Neutrino Experiments | Possibilities of a model independent treatment of the data from future
real-time solar neutrino experiments (SNO, Super-Kamiokande and others) are
discussed. It is shown that in the general case of transitions of the initial
solar $\nu_e$'s into $\nu_\mu$ and/or $\nu_\tau$ the total flux of initial 8B
neutrinos and the... | 1993-10-26 | 2009-10-22 | [
"hep-ph"
] | S.M. Bilenky and C. Giunti |
hep-ph/9310353 | The reactions \gwl\ and \gzl\ in $SU(N)$ strongly interacting theories | Building on recent phenomenology of \gpi, we discuss the expectation for two
photon production of longitudinal gauge boson pairs in $SU(N)$ technicolor
theories. The treatment involves a matching of dispersive techniques with the
methodology of chiral perturbation theory. | 1993-10-26 | 2009-10-22 | [
"hep-ph"
] | John F. Donoghue and Tibor Torma |
hep-ph/9310348 | Supersymmetric top decays | The supersymmetric decays of the top quark into charged Higgs plus bottom,
$\thb$, and into the supersymmetric partner of the top (${\wti u}_1$) plus the
lightest neutralino (${\wti \chi}_1^0$), $\tstopneu$, are discussed within the
framework of the Minimal Supersymmetric Standard Model with radiatively induced
breakin... | 1993-10-26 | 2009-09-25 | [
"hep-ph"
] | F.M. Borzumati |
hep-ph/9310351 | Measuring the Gluon Helicity Difference Distribution Function of the
Proton using Photoproduction Processes | Little information is known about the polarization of gluons inside a
longitudinally polarized proton. I report on the sensitivity of photoproduction
experiments to it. Both jet and heavy quark production are considered. | 1993-10-26 | 2007-05-23 | [
"hep-ph"
] | S. Keller |
hep-ph/9310345 | Hadron Production Ratios as Probes of Confinement and Freeze-Out | Particle production in central S-A collisions at 200 GeV/A energy is analysed
within a thermal model. Present data imply that the strange particles freeze
out at a higher temperature than the non-strange particles and that the
strangeness saturation is incomplete. | 1993-10-25 | 2016-08-16 | [
"hep-ph"
] | E. Suhonen, J. Cleymans, K. Redlich, H. Satz |
hep-ph/9310344 | Perturbative QCD Forbidden Charmonium Decays and Gluonia | We address the problem of observed charmonium decays which should be
forbidden in perturbative QCD. We examine the model in which these decays
proceed through a gluonic component of the $J/\Psi$ and the $\eta_c$, arising
from a mixing of $(c\bar c)$ and glueball states. We give some bounds on the
values of the mixing a... | 1993-10-25 | 2009-10-22 | [
"hep-ph"
] | M.Anselmino, M.Genovese and D.E.Kharzeev |
hep-ph/9310346 | Aspects of Heavy Quark Production in Polarized Proton-Proton Collisions | We examine the spin-dependence of b-quark production at large transverse
momentum in polarized proton-proton collisions. The leading-order (LO) 2 -> 2
subprocesses, g + g -> Q + Q-bar and q+ q-bar -> Q + Q-bar have a large
`analyzing power', as measured by the average spin-spin asymmetry <a-hat_{LL}>,
at large p_T, app... | 1993-10-25 | 2010-11-01 | [
"hep-ph"
] | M. Karliner and R. W. Robinett |
hep-ph/9310347 | Finite-Element Quantum Electrodynamics | We apply the finite-element lattice equations of motion for quantum
electrodynamics to an examination of anomalies in the current operators. By
taking explicit lattice divergences of the vector and axial-vector currents we
compute the vector and axial-vector anomalies in two and four dimensions. We
examine anomalous co... | 1993-10-25 | 2007-05-23 | [
"hep-ph"
] | Dean Miller, Kimball A. Milton, and Stephan Siegemund-Broka |
hep-ph/9310343 | Rydberg Wave Packets are Squeezed States | We point out that Rydberg wave packets (and similar ``coherent" molecular
packets) are, in general, squeezed states, rather than the more elementary
coherent states. This observation allows a more intuitive understanding of
their properties; e.g., their revivals. | 1993-10-23 | 2015-06-25 | [
"hep-ph"
] | Michael Martin Nieto |
hep-ph/9310342 | Magnetic quadrupole moment of $W$-boson in Kobayashi-Maskawa model | Magnetic quadrupole moment of $W$-boson in Kobayashi-Maskawa model, I.B.
Khriplovich and M.E. Pospelov, BUDKERINP 93--88 Due to CP-invariance violation
a vector particle can acquire T- and P-odd electromagnetic moment, magnetic
quadrupole one. The W-boson magnetic quadrupole moment is calculated in the
Kobayashi-Maskaw... | 1993-10-23 | 2010-11-01 | [
"hep-ph"
] | I.B. Khriplovich and M.E. Pospelov |
hep-ph/9310338 | The Non-Trivial Effective Potential of the `Trivial' lambda Phi^4
Theory: A Lattice Test | The strong evidence for the `triviality' of (lambda Phi^4)_4 theory is not
incompatible with spontaneous symmetry breaking. Indeed, for a `trivial' theory
the effective potential should be given exactly by the classical potential plus
the free-field zero-point energy of the shifted field; i.e., by the one-loop
effectiv... | 1993-10-22 | 2009-10-22 | [
"hep-ph",
"hep-lat",
"hep-th"
] | M. Consoli and P.M. Stevenson |
hep-ph/9310337 | A Bound on $m_\eta/m_{\eta'}$ for Large $N_C$ | If the number of colors is large, the ratio $m_\eta/m_{\eta'}$ is bounded
from above. The bound is not satisfied by the observed $\eta$ and $\eta'$
masses. | 1993-10-22 | 2009-09-11 | [
"hep-ph"
] | Howard Georgi |
hep-ph/9310341 | Transverse Momentum Distributions for Heavy Quark Pairs | We study the transverse momentum distribution for a $pair$ of heavy quarks
produced in hadron-hadron interactions. Predictions for the large transverse
momentum region are based on exact order $\alpha_s^3$ QCD perturbation theory.
For the small transverse momentum region, we use techniques for all orders
resummation of... | 1993-10-22 | 2010-11-01 | [
"hep-ph"
] | Edmond L. Berger and Ruibin Meng |
hep-ph/9310340 | Possibility of Studying Electroweak Symmetry Breaking at \gamma \gamma
Colliders | The studies of the electroweak symmetry breaking sector (EWSBS) at
$\gamma\gamma$ colliders were considered previously in the loop processes of
$\gamma\gamma \to w_Lw_L,\,z_Lz_L$, but they are suffered from the huge $W_T
W_T$ and $Z_TZ_T$ backgrounds. Here we present another possible process that
involves spectator $W$... | 1993-10-22 | 2016-09-01 | [
"hep-ph"
] | Kingman Cheung |
hep-ph/9310335 | Natural Slow-Roll Inflation | It is shown that the non-perturbative dynamics of a phase change to the
non-trivial phase of $\lambda\varphi^4$-theory in the early universe can give
rise to slow-rollover inflation without recourse to unnaturally small
couplings. | 1993-10-22 | 2010-11-01 | [
"hep-ph"
] | R. F. Langbein, K. Langfeld, H. Reinhardt, L. v. Smekal |
hep-ph/9310336 | On the Wess-Zumino-Witten anomalous functional at finite temperature | We discuss the finite temperature extension of the anomalous Wess-Zumino
-Witten lagrangian. The finite temperature S^1\times S^3 compactification makes
a structure in disconnected sectors, corresponding to different baryon numbers
appear naturally. The consistency of the anomalous functional is proved for
arbitrary ba... | 1993-10-22 | 2009-10-22 | [
"hep-ph"
] | R.F.Alvarez-Estrada, A.Dobado and A.Gomez Nicola |
hep-ph/9310339 | A New Time Contour for Thermal Field Theories | A new time contour is used to derive real-time thermal field theory. Unlike
previous path integral approaches, no contributions to the generating
functional are dropped. | 1993-10-22 | 2007-05-23 | [
"hep-ph"
] | T.S. Evans |
hep-ph/9310329 | Threshold Pion Electroproduction in Chiral Perturbation Theory | Electroproduction of pions on the nucleon near the threshold is analyzed
within the framework of baryon chiral perturbation theory. We give a thorough
discussion of the low--energy theorems related to charged and neutral
electropionproduction. It is shown how the axial radius of the nucleon can be
related to the S--wav... | 1993-10-21 | 2016-09-01 | [
"hep-ph",
"nucl-th"
] | V. Bernard, N. Kaiser, T.-S.H. Lee and Ulf-G. Mei{\ss}ner |
hep-ph/9310332 | $b \to s \gamma$ Decay in $SU(2)_L \times SU(2)_R \times U(1)$
Extensions of the Standard Model | The rare radiative decay $b \to s \gamma$ is studied in $SU(2)_L \times
SU(2)_R \times U(1)$ extensions of the Standard Model. Matching conditions for
coefficients of operators appearing in the low energy effective Hamiltonian for
this process are derived, and QCD corrections to these coefficients are
analyzed. The $b ... | 1993-10-21 | 2009-10-22 | [
"hep-ph"
] | Peter Cho and Mikolaj Misiak |
hep-ph/9310330 | Spontaneous symmetry breaking of (1+1)-dimensional $\phi^4$ theory in
light-front field theory (II) | We discuss spontaneous symmetry breaking of (1+1)-dimensional $\phi^4$ theory
in light-front field theory using a Tamm-Dancoff truncation. We show that, even
though light-front field theory has a simple vacuum state which is an
eigenstate of the full Hamiltonian, the field can develop a nonzero vacuum
expectation value... | 1993-10-21 | 2010-11-01 | [
"hep-ph"
] | Stephan Pinsky and Brett van de Sande |
hep-ph/9310333 | Progress in SSC Physics: Report of the Higgs Working Group | I review new developments in Higgs physics and electroweak symmetry breaking
that have resulted from the Madison--Argonne workshops on SSC physics. | 1993-10-21 | 2007-05-23 | [
"hep-ph"
] | J.F. Gunion and S. Geer |
hep-ph/9310326 | Penguin contributions to rates and CP asymmetries in non-leptonic
B-decays. Possible experimental procedures and estimates | We present a study of non-leptonic B-meson decays, partial widths and CP
asymmetries, and discuss the possibilities of determining the penguin
contributions through less model-dependent phenomenological analyses. In the
last section we employ a specific model to give more definite numerical
predictions. | 1993-10-21 | 2010-11-01 | [
"hep-ph"
] | A. Deandrea, N. Di Bartolomeo, R. Gatto, F. Feruglio and G. Nardulli |
hep-ph/9310334 | Non Leptonic Two Body Decays of B Mesons | Within the framework of the factorization approximation, two body
non-leptonic decays of $B$ mesons are related to semileptonic matrix elements
and form factors, evaluated with an effective lagrangian incorporating both
chiral and heavy quark symmetries. Using semileptonic $D$-decay data, estimates
for nonleptonic proc... | 1993-10-21 | 2007-05-23 | [
"hep-ph"
] | A. Deandrea |
hep-ph/9310327 | Light Gluinos at LEP | We study the production and decay of \lgl s in \ep\ collisions. We suggest a
signature which suffers little from backgrounds and argue that the \lgl\ window
can already be closed with the existing LEP data, provided the gluino lifetime
is such that it decays within the detectors. | 1993-10-21 | 2010-01-06 | [
"hep-ph"
] | Frank Cuypers |
hep-ph/9310331 | Fritzsch Texture in SUSY-SO(10) with Large Neutrino Mixing | Fritzsch's texture is imposed on {\em all} mass matrices in a SUSY-SO(10) via
a family $U(1)_{PQ}$ symmetry. The observed charged fermion parameters fix the
$\nu$-masses and mixing, while the later are evolved from the GUT scale to low
energies using the RG. Large $\sin^2 2{\theta}_{12}$ results. As in a SUSY-GUT
no in... | 1993-10-21 | 2009-10-22 | [
"hep-ph"
] | Yoav Achiman and Thorsten Greiner |
hep-ph/9310328 | Parton Interaction Rates and Limits on Perturbative QCD | The relevance of parton interaction rates for observables of a quark- gluon
plasma and for testing field theoretical methods is exhibited. Using the
Braaten-Pisarski method the interaction rate as well as the transport rate
beyond the leading logarithm approximation are estimated. Limts on the validity
of perturbative ... | 1993-10-21 | 2009-09-25 | [
"hep-ph",
"nucl-th"
] | Markus H. Thoma |
hep-ph/9310321 | Shadowing in deuterium and the small--$x$ limit of $F_2^n/F_2^p$ and
$F_2^p - F_2^n$ | We discuss the updated NMC determination of $F_2^n/F_2^p$ and $F_2^p -
F_2^n$. Shadowing effects in deuterium make the structure functions determined
by the NMC sensibly different from the true ones in the low--$x$ region. We
show that the departure of $F_2^n/F_2^p$ and $F_2^p-F_2^n$ from the Regge
expectations at smal... | 1993-10-20 | 2009-10-22 | [
"hep-ph"
] | V.Barone, M.Genovese, N.N.Nikolaev, E.Predazzi and B.G.Zakharov |
hep-ph/9310324 | K_S\rightarrow \gamma\gamma , K_L\rightarrow\pi^0\gamma\gamma$ and
Unitarity | Agreement between the experimental value $\Gamma (K_S\rightarrow
\gamma\gamma)$ and the number predicted via a one-loop chiral perturbation
theory calculation has been cited as a success for the latter. On the other
hand the one-loop prediction for the closely related process $K_L\rightarrow
\pi^0\gamma\gamma$ has been... | 1993-10-20 | 2009-10-22 | [
"hep-ph"
] | J. Kambor and B.R. Holstein |
hep-ph/9310323 | Proposals for measuring transversity distributions in deep inelastic
electron scattering and a model for E-704 asymmetries | We present the principles of the measurement of the quark transversity
distributions in semi-inclusive deep inelastic electron scattering, which form
the basis of HELP and one of the ELFE proposals. A string model for
Collins-type asymmetry in polarized quark fragmentation function is proposed. A
possible role of the C... | 1993-10-20 | 2007-05-23 | [
"hep-ph"
] | X. Artru |
hep-ph/9310318 | Ideas on charm and beauty decays | The parton model, a zero-order approximation in many treatments, is shown to
be a ``semiclassical" model whose results for certain averages also hold
(correspondence principle) in quantum mechanics. Algebraic techniques developed
for the M\"ossbauer effect exploit simple features of commutators to obtain sum
rules show... | 1993-10-20 | 2007-05-23 | [
"hep-ph"
] | Harry J. Lipkin |
hep-ph/9310325 | Near Future Perpectives of QCD Spin Studies | We consider the physics motivations and perspectives for the study of spin
phenomena at the future high energies accelerators. The possibilities to use
the already operating machines are also discussed. It is emphasized that the
present status of QCD spin studies necessarily requires a wide range of spin
measurements | 1993-10-20 | 2008-11-26 | [
"hep-ph"
] | P.M.Nadolsky, S.M.Troshin and N.E.Tyurin |
hep-ph/9310322 | $\Pi$ in the Sky ? Microwave Anisotropies from Cosmic Defects | High resolution maps of the anisotropy of the microwave sky will yield
invaluable clues as to the mechanisms involved in cosmic structure formation.
One fundamental question they should answer is whether the fluctuations were
Gaussian random noise, as predicted in inflationary models, or were nonGaussian
as in theories... | 1993-10-20 | 2009-10-22 | [
"hep-ph",
"astro-ph"
] | David Coulson, Pedro Ferreira, Paul Graham and Neil Turok |
hep-ph/9310317 | A Symmetry Approach to CP Violation | One of the greatest challenges for particle physics in the 1990's is
understanding the broken symmetry of CP violation. It is now almost 30 years
since the discovery in 1964 of the $K_{L} \rightarrow 2\pi$ decay. What has
happened since? Why has there been no significant new experimental input in
this long period? The ... | 1993-10-20 | 2007-05-23 | [
"hep-ph"
] | Harry J. Lipkin |
hep-ph/9310319 | Non-Equilibrium Evolution of Scalar Fields in FRW Cosmologies I | We derive the effective equations for the out of equilibrium time evolution
of the order parameter and the fluctuations of a scalar field theory in
spatially flat FRW cosmologies.The calculation is performed both to one-loop
and in a non-perturbative, self-consistent Hartree approximation.The method
consists of evolvin... | 1993-10-20 | 2009-10-22 | [
"hep-ph",
"astro-ph",
"gr-qc"
] | D. Boyanovsky, H. J. de Vega and R. Holman |
hep-ph/9310320 | Mass Matrix Models: The Sequel | The smallness of the quark sector parameters and the hierarchy between them
could be the result of a horizontal symmetry broken by a small parameter. Such
an explicitly broken symmetry can arise from an exact symmetry which is
spontaneously broken. Constraints on the scales of new physics arise {}from new
flavor changi... | 1993-10-20 | 2009-09-15 | [
"hep-ph",
"hep-th"
] | Miriam Leurer, Yosef Nir and Nathan Seiberg |
hep-ph/9310312 | Weak dipole moment of $\tau$ in $e^+e^-$ collisions with longitudinally
polarized electrons | It is pointed out that certain CP-odd momentum correlations in the production
and subsequent decay of tau pairs in $e^+e^-$ collisions get enhanced when the
$e^-$ is longitudinally polarized. Analytic expressions for these correlations
are obtained for the single-pion decay mode of $\tau$ when $\tau^+\tau^-$ have
a ``w... | 1993-10-19 | 2010-11-01 | [
"hep-ph"
] | B. Ananthanarayan and Saurabh D. Rindani |
hep-ph/9310316 | ERRATUM TO: Power corrections $1/Q^2$ to parton sum rules for deep
inelastic scattering from polarized targets | We clarify conflicting results in the literature on coefficient functions in
front of higher twist operators contributing to the parton sum rules for deep
inelastic scattering from polarized targets. The necessary corrections do not
affect our calculations of matrix elements, published in
Phys.Lett.B242(1990)245, but c... | 1993-10-19 | 2009-10-22 | [
"hep-ph"
] | I.I. Balitsky, V.M.Braun, A.V. Kolesnichenko |
hep-ph/9310313 | Principal Value Resummation | We present a new resummation formula for the Drell-Yan cross section. The
formal resummation of threshold corrections in Drell-Yan hard-scattering
functions produces an exponent with singularities from the infrared pole of the
QCD running coupling. Our reformulation treats such `infrared renormalons' by a
principal val... | 1993-10-19 | 2014-11-17 | [
"hep-ph"
] | Harry Contopanagos and George Sterman |
hep-ph/9310315 | The Theory Of Ideal Yang-Mills Fluids In Symmetric Hyperbolic Form | The theory of ideal Yang-Mills fluids (IYMF; a Yang-Mills field coupled to a
fluid in the limit of infinite conductivity) is embedded in symmetric
hyperbolic form. This yields both causality and well-posedness of initial value
problems in this theory. The embedding is based on a covariant, constraint-free
divergence fo... | 1993-10-19 | 2007-05-23 | [
"hep-ph"
] | Maurice H.P.M. van Putten (Institute for Theoretical Physics,UCSB,
Santa Barbara, CA) |
hep-ph/9310309 | Hyperons in the Bound State Approach to the Nambu--Jona-Lasinio Chiral
Soliton | For the Nambu--Jona--Lasinio (NJL) model in the proper time regularization
scheme the chiral soliton is investigated for the case of three flavors within
the framework of the bound state approach to strangeness. For this purpose
meson fluctuations off the non--strange soliton are considered. For the kaon
P--wave channe... | 1993-10-19 | 2009-09-25 | [
"hep-ph"
] | H. Weigel, R. Alkofer and H. Reinhardt |
hep-ph/9310314 | Sterile Neutrinos and Future Solar Neutrino Experiments | It is shown that future solar neutrino experiments (SNO, Super-Kamiokande and
others), in which high energy neutrinos will be detected (mostly from 8B
decay), may allow to answer in a model independent way the question whether
there are transitions of solar $\nu_e$'s into sterile states. No assumptions
about the initia... | 1993-10-19 | 2009-09-24 | [
"hep-ph"
] | S.M. Bilenky and C. Giunti |
hep-ph/9310311 | Enhancement of the $K_L$ -- $K_S$ Mass Difference by Short Distance QCD
Corrections Beyond Leading Logarithms | We calculate the next-to-leading order short distance QCD corrections to the
coefficient $\eta_1$ of the effective $\Delta S = 2$ hamiltonian in the
standard model. This part dominates the short distance contribution $(\Delta
m_K)^{\rm SD}$ to the $K_L$ -- $K_S$ mass difference. The next-to-leading order
result enhance... | 1993-10-19 | 2009-10-22 | [
"hep-ph"
] | S. Herrlich and U. Nierste |
hep-ph/9310310 | Effects of Possible $\Delta B =- \Delta Q$ Transitions in Neutral $B$
Meson Decays} | We explore the possibility that the existing data on like-sign dileptons at
the $\Upsilon (4S)$ resonance consist of events arising from $B_{d}^0 -\bar
B_{d}^0$ mixing and also from $\Delta B = - \Delta Q$ transitions. The
consequences of these nonstandard transitions for certain time-asymmetries
which are likely to be... | 1993-10-19 | 2010-11-01 | [
"hep-ph"
] | G.V. Dass and K.V.L. Sarma |
hep-ph/9310305 | Long-Lived Charged Heavy Leptons | Very little is known about the mass spectrum of fermions in the standard
model. In this talk, I point out that in the simplest extension of the standard
model, in which all right-handed fields are singlets, it is quite possible that
a fourth-generation neutrino will be heavier that its charged counterpart. The
latter w... | 1993-10-18 | 2007-05-23 | [
"hep-ph"
] | Marc Sher |
hep-ph/9310298 | A Consistent Next-to-Leading-Order QCD Calculation of Hadronic
Diffractive Scattering | We calculate the order alpha_s^2 and order alpha_s^3 QCD contributions to
colour-singlet exchange in the leading log s approximation. We implement the
resulting amplitude at the hadronic level and thus construct the QCD pomeron
and odderon to this order of perturbation theory. We show that the structure of
the hadronic... | 1993-10-18 | 2009-10-22 | [
"hep-ph"
] | J.R. Cudell and B.U. Nguyen |
hep-ph/9310300 | Cheshire Cat Hadrons | This article is based on a series of lectures given at ELAF 93 on the
description of low-energy hadronic systems {\it in and out} of hadronic medium.
The focus is put on identifying, with the help of a Cheshire Cat philosophy,
the effective degrees of freedom relevant for the strong interactions from a
certain number o... | 1993-10-18 | 2015-08-25 | [
"hep-ph",
"nucl-th"
] | Mannque Rho (SPhT/CEA Saclay) |
hep-ph/9310301 | Dimensional Reduction in Non-Supersymmetric Theories | It is shown that regularisation by dimensional reduction is a viable
alternative to dimensional regularisation in non-supersymmetric theories. | 1993-10-18 | 2009-10-22 | [
"hep-ph"
] | I.Jack, D.R.T. Jones and K.L.Roberts |
hep-ph/9310303 | The Non-Trivial Phase of $\phi ^{4}$-Theory in an External Magnetic
Field and at Finite Temperature | The effective potential for the order parameter $\phi ^{\dagger } \phi$ is
investigated in massless $\phi ^{4}$-theory in the presence of magnetic fields
at finite temperature. It is found that the first order nature of the phase
transition from the non-trivial to the perturbative ground state at a critical
temperature... | 1993-10-18 | 2009-09-25 | [
"hep-ph"
] | K. Langfeld |
hep-ph/9310304 | Axion Emission from Red Giants and White Dwarfs | Using thermal field theory methods, we recalculate axion emission from dense
plasmas. We study in particular the Primakoff and the bremsstrahlung processes.
The Primakoff rate is significantly suppressed at high densities, when the
electrons become relativistic. However, the bound on the axion-photon coupling,
$G<10^{-... | 1993-10-18 | 2009-09-25 | [
"hep-ph"
] | T. Altherr, E. Petitgirard and T. del Rio Gaztelurrutia |
hep-ph/9310302 | One-loop Effective Lagrangian for a Standard Model with a Heavy Charged
Scalar Singlet | We study several problems related to the construction and the use of
effective Lagrangians by considering an extension of the standard model that
includes a heavy scalar singlet coupled to the leptonic doublet. Starting from
the full renormalizable model, we build an effective field theory by
integrating out the heavy ... | 1993-10-18 | 2009-10-22 | [
"hep-ph"
] | Mikhail Bilenky and Arcadi Santamaria |
hep-ph/9310307 | General Determination of Phases in Quark Mass Matrices | We construct new invariants and give several theorems which determine in
general (i) the number of physically meaningful phases in quark mass matrices
and (ii) which elements of these matrices can be rendered real by rephasings.
We illustrate our results with simple models. | 1993-10-18 | 2010-11-01 | [
"hep-ph"
] | A. Kusenko and R. Shrock |
hep-ph/9310306 | The Spin Structure of the Nucleon | We provide an introduction to the ideas of spin-dependent deep-inelastic
scattering. Recent experimental results are summarised and possible
explanations related to the axial anomaly presented. Further experiments that
could greatly clarify the situation are also described. | 1993-10-18 | 2010-02-17 | [
"hep-ph"
] | S. D. Bass (Cavendish Lab., Cambridge) and A. W. Thomas (Adelaide) |
hep-ph/9310308 | Progress in Evaluating Some Complicated Types of Feynman Diagrams with
Two (and More) Loops | Problems occurring in physically important non-trivial examples of loop
calculations are discussed.
A procedure of deriving expansions of two-loop self-energy diagrams with
different masses is constructed. The cases of small and large external momentum
are considered. The coefficients of the expansions are calculated... | 1993-10-18 | 2007-05-23 | [
"hep-ph"
] | A.I. Davydychev |
hep-ph/9310297 | Leptogenesis in Supersymmetric Standard Model with Right-handed Neutrino | We show that the leptogenesis is automatic within the supersymmetric standard
model if there exist right-handed neutrinos with mass less than $H_{\it inf}$,
the expansion rate during the inflation. Its scalar component grows during the
inflation due to the quantum fluctuation, oscillates coherently after the
inflation,... | 1993-10-17 | 2009-09-29 | [
"hep-ph",
"astro-ph"
] | Hitoshi Murayama and T. Yanagida |
hep-ph/9310295 | Signatures of left-right symmetry at high energies | We discuss various experimental tests of the left-right symmetric model
possible to perform in the next generation linear colliders. We consider
processes which provide sensitive probes of the basic ingredients of the model:
right-handed gauge bosons, right-handed Majorana neutrinos, lepton number
violating interaction... | 1993-10-17 | 2009-09-25 | [
"hep-ph"
] | Jukka Maalampi |
hep-ph/9310296 | Chemical Relaxation Times in a Hadron Gas at Finite Temperature | The relaxation times of particle numbers in hot hadronic matter with
vanishing baryon number are estimated using the ideal gas approximation and
taking into account resonance decays and annihilation processes as the only
sources of particle number fluctuations. Near the QCD critical temperature the
longest relaxation t... | 1993-10-17 | 2014-11-17 | [
"hep-ph"
] | J.L.Goity |
hep-ph/9310294 | B Decays in the Standard Model and Beyond | B decays in and beyond the standard model are reviewed. I specifically
discuss right-handed B decays, rare B decays, B_c decays, B_s-B_s(bar) mixing,
and T violation. (Plenary talk given at the `Workshop on B Physics at Hadron
Accelerators', Snowmass, Colorado, June 21-July 2, 1993.) | 1993-10-16 | 2009-09-25 | [
"hep-ph"
] | David London |
hep-ph/9310293 | The Proton Spin Structure in Skyrme Type Models | It is demonstrated how in the soliton approach to baryons a small but
non-vanishing matrix element of the axial singlet current is obtained.
Furthermore it is shown that these models also provide a mechanism to
disentangle the ``matter" and ``glue" contributions to this matrix element.
Numerical results indeed exhibit ... | 1993-10-15 | 2007-05-23 | [
"hep-ph"
] | H. Weigel |
hep-ph/9310299 | Light Quark Masses from Exclusive Tau Decays: An Experimental Proposal | A method of indirect measurement of the light quark running mass $\hat{m} =
(m_d + m_u)/2$ is elaborated in detail. It is based on measuring 1\%-level
azimuthal angular asymmetries in the decay $\tau \rightarrow \nu_\tau + 3\pi$.
The latter are then used in QCD sum rules to obtain experimental lower bounds
for $\hat{m}... | 1993-10-15 | 2009-09-25 | [
"hep-ph"
] | J. Stern, N. H. Fuchs and M. Knecht |
hep-ph/9310291 | Like Sign Dilepton Signature for Gluino Production at LHC with or
without R Conservation | The isolated like sign dilepton signature for gluino production is
investigated at the LHC energy for the $R$ conserving as well as the $L$ and
$B$ violating SUSY models over a wide range of the parameter space. One gets
viable signals for gluino masses of 300 and 600 GeV for both $R$ conserving and
$L$ violating model... | 1993-10-15 | 2009-09-25 | [
"hep-ph"
] | H. Dreiner, Manoranjan Guchait, D.P. Roy |
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