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/9403281 | Splitting the pomeron into two jets: a novel process at HERA | We study a novel property of large rapidity-gap events in deep inelastic
scattering at HERA: splitting the pomeron into two jets in the photon-pomeron
fusion reaction $\gamma^{*}\Pom \rightarrow q\bar{q}$. It gives rise to the
diffraction dissociation of virtual photons into the back-to-back jets. We find
that at large... | 1994-03-13 | 2009-10-28 | [
"hep-ph"
] | N.N. Nikolaev and B.G. Zakharov |
hep-ph/9403282 | QCD Corrections to $\Delta\rho$ | We discuss a simple method to evaluate the QCD corrections to $\Delta\rho$.
It assumes that the perturbative expansion in terms of $\ms$ parameters is
meaningful and, unlike other studies, exploits significant available
information concerning $\chass$ corrections. This approach leads to an
enhancement of $\sim26\%$ rel... | 1994-03-13 | 2007-05-23 | [
"hep-ph"
] | A. Sirlin |
hep-ph/9403280 | $CP$ violation in minimal supersymmetric standard model | $CP$ violating phenomena predicted by the minimal supersymmetric standard
model are discussed in a case where the $CP$ violating phases in SUSY sector
are not suppressed. The electric dipole moments of the neutron and the electron
are large, but can be smaller than their experimental upper bounds if the
scalar quarks a... | 1994-03-12 | 2015-06-25 | [
"hep-ph"
] | Yoshiki Kizukuri and Noriyuki Oshimo |
hep-ph/9403278 | Multiparticle Dynamics from 1983 to 1993 | I compare our understanding selected topics in Multiparticle Dynamics at this
meeting to what we knew at the 1983 Multiparticle Dynamics Symposium. I also
discuss rapidity gap physics, a subject that has developed in the years since
1983 | 1994-03-12 | 2009-09-25 | [
"hep-ph"
] | D. E. Soper |
hep-ph/9403279 | The Second Moment of the Structure Function for Pseudoscalar Mesons in
QCD Sum Rules | We calculate the values of the second moment $M_2^s$ of the flavor-singlet
structure function $F_2^s$ for the pion and the kaon in QCD sum rules, and
investigate how the results depend on their flavor structure (quark contents).
Our calculations give similar values of $M_2^s$ for these two mesons, because
of cancellati... | 1994-03-12 | 2015-06-25 | [
"hep-ph"
] | Yoshinori Nishino |
hep-ph/9403269 | Formation of Topological Defects in a Second Order Phase Transition | The classical evolution equations of the Abelian Higgs model are studied at
temperatures below the Ginsburg temperature of a phase transition which is
assumed to be second order. It is shown that the initial thermal fluctuations
provide a domain structure which is stable against late time fluctuations. This
result lend... | 1994-03-11 | 2010-11-01 | [
"hep-ph",
"astro-ph"
] | Robert H. Brandenberger (Brown Univ.) and Anne-Christine Davis (DAMTP,
Cambridge) |
hep-ph/9403277 | Topologically Stable Z - Strings in the Supersymmetric Standard Model | We show that the minimal supergravity extension of the standard model
automatically contains topologically stable electroweak strings if the hidden
sector is invariant under the exact R-symmetry. These defects appear in the
form of the semiglobal R-strings, which necessarily carry $Z$-flux inside their
core. This resul... | 1994-03-11 | 2009-10-28 | [
"hep-ph"
] | G. Dvali and Goran Senjanovi{\'c} |
hep-ph/9403268 | Construction of Fermion Mass Matrices Yielding Two Popular Neutrino
Scenarios | A new procedure proposed recently enables one to start from the quark and
lepton mass and mixing data at the low scale and construct mass matrices which
exhibit simple SO(10) structure at the SUSY GUT scale. We elaborate here on the
numerical details which led us to an SO(10) model for the quark and lepton mass
matrice... | 1994-03-11 | 2009-04-21 | [
"hep-ph"
] | Carl H. Albright and Satyanarayan Nandi |
hep-ph/9403273 | Disoriented Chiral Condensates and Quantum Mechanical Isospin
Correlation | Classical considerations suggest that the probability distribution $P(R)$,
where $R$ is the ratio of neutral pions to total pions emitted from a
disoriented chiral condensate (which has been hypothesized to form in heavy ion
reactions) is $R^{-1/2}/2$. Quantum mechanical isospin correlations between the
condensate and ... | 1994-03-11 | 2016-09-01 | [
"hep-ph"
] | Thomas D. Cohen, Manoj K. Banerjee, Marina Nielsen and Xuemin Jin |
hep-ph/9403275 | A Single Scale Theory for Cold and Hot Dark Matter | We show that a recently proposed extension of the MSSM can provide a scenario
where both the cold and hot dark matter of the universe owe their origin to a
single scale connected with the breakdown of the global B-L symmetry. The susy
partner of the majoron and the light Majorana neutrinos are the cold and hot
dark mat... | 1994-03-11 | 2009-10-28 | [
"hep-ph"
] | R. N. Mohapatra and A. Riotto |
hep-ph/9403272 | An Interesting Charmonium State Formation and Decay : $p \bar p \to
^1D_2 \to ^1P_1 \gamma$ | Massless perturbative QCD forbids, at leading order, the exclusive
annihilation of proton-antiproton into some charmonium states, which, however,
have been observed in the $p\bar p$ channel, indicating the significance of
higher order and non perturbative effects in the few GeV energy region. The
most well known cases ... | 1994-03-11 | 2009-10-28 | [
"hep-ph"
] | M. Anselmino, F. Caruso, F. Murgia, M.R. Negrao |
hep-ph/9403274 | Two-Loop Gluon-Condensate Contributions To Heavy-Quark Current
Correlators: Exact Results And Approximations | The coefficient functions of the gluon condensate $<G^2>$, in the correlators
of heavy-quark vector, axial, scalar and pseudoscalar currents, are obtained
analytically, to two loops, for all values of $z=q^2/4m^2$. In the limiting
cases $z\to0$, $z\to1$, and $z\to-\infty$, comparisons are made with previous
partial res... | 1994-03-11 | 2010-11-01 | [
"hep-ph"
] | D.J. Broadhurst, P.A. Baikov, V.A. Ilyin, J. Fleischer, O.V. Tarasov,
V.A. Smirnov |
hep-ph/9403276 | Diffractive jet production in a simple model with applications to HERA | In diffractive jet production, two high energy hadrons A and B collide and
produce high transverse momentum jets, while hadron A is diffractively
scattered. Ingelman and Schlein predicted this phenomenon. In their model, part
of the longitudinal momentum transferred from hadron A is delivered to the jet
system, part is... | 1994-03-11 | 2009-10-28 | [
"hep-ph"
] | Arjun Berera and Davison E. Soper |
hep-ph/9403270 | On leading charmed meson production in $\pi$-nucleon interactions | It is shown that the D--meson, whose light quark is the initial-pion valence
quark and whose charmed quark is produced in annihilation of valence quarks and
has got a large enough momentum, is really a leading meson in reactions like
$\pi^- p -> DX$. If such annihilation of valence quarks from initial hadrons is
imposs... | 1994-03-11 | 2015-06-25 | [
"hep-ph"
] | V.A. Bednyakov |
hep-ph/9403271 | The Fermion Determinant in External Scalar Fields: Exact Results and
Large Mass Approximation | We present results for the fermion determinant in an external Yukawa-coupled
scalar field, a quantity relevant to instanton and sphaleron transition rates
as well as bubble nucleation occuring in the electroweak phase transition when
the scalar field is identified with the Higgs field. We calculate the
determinant exac... | 1994-03-11 | 2009-10-28 | [
"hep-ph",
"hep-th"
] | J. Baacke, H. So and A. Suerig |
hep-ph/9403264 | Relativistic Effects in the Scalar Meson Dynamics | A separable potential formalism is used to describe the $\pi\pi$ and
$K\overline{K}$ interactions in the scalar-isoscalar states in the energy range
from the $\pi\pi$ threshold up to 1.4 GeV. Introduction of relativistic
propagators into a system of Lippmann-Schwinger equations leads to a very good
description of the d... | 1994-03-10 | 2009-09-25 | [
"hep-ph"
] | R.Kaminski, L.Lesniak and J.-P. Maillet |
hep-ph/9403261 | Pion Form Factor: Transition From Soft To Hard QCD | We have reexamined the elastic pion form factor over a broad range of
momentum transfers with the mass evolution from current quark to constituent
quark being taken into account. We have also studied the effect of Sudakov form
factors, of anomalous quark magnetic moments and of alternative soft wave
functions. Our calc... | 1994-03-10 | 2016-09-01 | [
"hep-ph"
] | Leonard S. Kisslinger and Siwen Wang |
hep-ph/9403262 | Instanton -- Antiinstanton interaction and asymptotics of perturbation
theory expansion in double well oscillator | Instanton -- antiinstanton pair is considered as a source of singularity at
the Borel plane for the ground state energy of anharmonic oscillator. The
problem of defining the short range instanton -- antiinstanton interaction
reduces to calculation of a smooth part of the Borel function, which cannot be
found without ex... | 1994-03-10 | 2009-10-28 | [
"hep-ph",
"hep-th"
] | S.V.Faleev, P.G.Silvestrov |
hep-ph/9403266 | Hadronic Penguin B Decays In The Standard And The Two-Higgs-Doublet
Models | We study in next-to-leading order QCD hadronic penguin $B$ decays in the
Standard and two-Higgs-doublet models. Although the gluonic penguin dominates,
we find the electroweak contribution non-negligible. In the Standard Model, the
branching ratio for $B \rightarrow X_s \phi$ is predicted to be in the range
$(0.6\sim 2... | 1994-03-10 | 2009-09-25 | [
"hep-ph"
] | N. Deshpande and Xiao-Gang He |
hep-ph/9403267 | A Note on Thermal Activation | Thermal activation is mediated by field configurations that correspond to
saddle points of the energy functional. The rate of probability flow along the
unstable functional directions, i.e the activation rate, is usually obtained
from the imaginary part of a suitable analytic continuation of the equilibrium
free energy... | 1994-03-10 | 2017-01-18 | [
"hep-ph"
] | Daniel Boyanovsky, Richard Holman, Da-Shin Lee, Jo\~ao P. Silva |
hep-ph/9403265 | J-Psi Suppression in Hadron-Nucleus Collisions | We examine the production of J/$\Psi$ mesons in high energy hadron-nucleus
collisions using models that account for both the initial state modification of
parton distributions in nuclei and the final state interaction of the produced
$c\bar c$ pairs. We show that, at the energies of current fixed target
experiments, J/... | 1994-03-10 | 2009-09-25 | [
"hep-ph",
"nucl-th"
] | C.J. Benesh, J. Qiu and J.P. Vary |
hep-ph/9403263 | Light Quark Masses and Mixing Angles | I review the present state of our knowledge about the masses and weak mixing
elements of the u, d, s quarks. This is the written version of lectures given
in the 1993 Theoretical Advanced Study Institute (TASI). | 1994-03-10 | 2016-10-26 | [
"hep-ph"
] | John F. Donoghue |
hep-ph/9403259 | On Preserving a B+L Asymmetry Produced in the Early Universe | One of the most efficient mechanisms for producing the baryon asymmetry of
the Universe is the decay of scalar condensates in a SUSY GUT as was first
suggested by Affleck and Dine. We show that given a large enough asymmetry, the
baryon number will be preserved down to low temperatures even if B - L = 0,
because the ba... | 1994-03-09 | 2009-09-15 | [
"hep-ph",
"astro-ph"
] | Sacha Davidson, Hitoshi Murayama, and Keith A. Olive |
hep-ph/9403257 | Violation of CPT and Quantum Mechanics in the K0--K0bar System | We reconsider the model of quantum mechanics violation in the $\ko$--$\kob$
system, due to Ellis, Hagelin, Nanopoulos, and Srednicki, in which \cp- and
\cpt-violating signatures arise from the evolution of pure states into mixed
states. We present a formalism for computing time-dependent asymmetries in this
model and s... | 1994-03-09 | 2010-11-01 | [
"hep-ph"
] | Patrick Huet and Michael E. Peskin |
hep-ph/9403253 | Upsilon \bar BB$ Couplings, Slope of the Isgur-Wise Function and
Improved Estimate of \boldmath{$V_{cb}$}} | We estimate the sum of the $\Upsilon \bar BB $ couplings using QCD Spectral
Sum Rules (QSSR). Our result implies the phenomenological bound $\xi'(vv'=1)
\geq -1.04$ for the slope of the Isgur-Wise function. An analytic estimate of
the (physical) slope to two loops within QSSR leads to the accurate value
$\xi'(vv'=1) \s... | 1994-03-09 | 2010-11-01 | [
"hep-ph"
] | S. Narison |
hep-ph/9403254 | Precise Determination of {$f_{P_{s}}/f_P$}} {\bf and Measurement of the
``Perturbative'' Pole Mass from {$f_P$}} | We present a compact analytic two-loop expression of the $SU(3)_f$ breaking
effects on the ratio of the pseudoscalar decay constants $R_P \equiv
f_{P_S}/f_P$ ($P \equiv D,B $), from which, we extract the precise values :
$R_D = 1.15 \pm .04$, $R_B = 1.16 \pm .05 $, where the errors are mainly due to
the uncalculated $\... | 1994-03-09 | 2011-01-27 | [
"hep-ph"
] | S. Narison |
hep-ph/9403260 | $Q^2$-Dependence of Deep Inelastic Sum Rules | In this talk, I will concentrate on $Q^2$-dependence of deep inelastic sum
rules. I will first give a modern definition of deep-inelastic sum rules and
then discuss physical origins of their scaling violation at finite $Q^2$.
Following this, I discuss a few well-known examples, in particular, the Bjorken
sum rule, whic... | 1994-03-09 | 2007-05-23 | [
"hep-ph"
] | Xiangdong Ji |
hep-ph/9403250 | Two-loop next-to-leading $\mt$ corrections to the $\rho$ parameter | The $O(G^2_\mu m_t^4)$ correction to the $\rho$ parameter is computed within
the Standard Model using the current algebra formulation of radiative
corrections. This approach is proved to be equivalent to the effective
Lagrangian method proposed by Barbieri {\em et al.} Using the same framework,
the $O(G^2_\mu m_t^2 m_z... | 1994-03-09 | 2015-06-25 | [
"hep-ph"
] | G. Degrassi, S. Fanchiotti and P. Gambino |
hep-ph/9403258 | A Constituent Quark Anti-Quark Effective Lagrangian Based on the Dual
Superconducting Model of Long Distance QCD | We review the assumptions leading to the description of long distance QCD by
a Lagrangian density expressed in terms of dual potentials. We find the color
field distribution surrounding a quark anti-quark pair to first order in their
velocities. Using these distributions we eliminate the dual potentials from the
Lagran... | 1994-03-09 | 2019-08-17 | [
"hep-ph"
] | M. Baker, J.S Ball, F. Zachariasen |
hep-ph/9403255 | Isospin Analysis of Two-body B Decays and Test of Factorization | It is shown that the existing data on two-body B decays, some of them only
upper limits, are precise enough to perform an isospin analysis to extract the
phase shifts due to final state interaction. Unlike charm decays, no
significant final state interaction is observed in decays $B\to D\pi, D\rho$,
and $D^*\pi$ suppor... | 1994-03-09 | 2009-09-25 | [
"hep-ph"
] | Hitoshi Yamamoto |
hep-ph/9403249 | Higher Order $1/m$ Corrections at Zero Recoil | The general structure of the $1/m$ corrections at zero recoil is studied. The
relevant matrix elements are forward matrix elements of local higher
dimensional operators and their time ordered products with higher order terms
from the Lagrangian. These matrix elements may be classified in a simple way
and the analysis a... | 1994-03-09 | 2010-11-01 | [
"hep-ph"
] | Thomas Mannel |
hep-ph/9403252 | Gauge covariant fermion propagator in quenched, chirally-symmetric
quantum electrodynamics | We discuss the chirally symmetric solution of the massless, quenched,
Dyson-Schwinger equation for the fermion propagator in three and four
dimensions. The solutions are manifestly gauge covariant. We consider a gauge
covariance constraint on the fermion--gauge-boson vertex, which motivates a
vertex Ansatz that both sa... | 1994-03-09 | 2010-03-04 | [
"hep-ph"
] | Zhihua Dong, Herman J. Munczek and Craig D. Roberts |
hep-ph/9403256 | Single and Double BFKL Pomeron Exchange and a Dipole Picture of High
Energy Hard Processes | Onium-onium scattering at high energy is used to illustrate a dipole picture
of high energy hard scattering in the large $N_c$ limit. Single and double BFKL
pomeron exchanges are calculated in the leading logarithmic approximation. An
expression is given for the triple pomeron coupling when one of the pomeron's
momentu... | 1994-03-09 | 2009-10-28 | [
"hep-ph"
] | A.H. Mueller and Bimal Patel |
hep-ph/9403251 | Anomalous Evolution of Nonsinglet Nucleon Structure Functions | We calculate the scale dependence of nonsinglet nucleon structure functions.
Due to anomalous axial symmetry breaking a large flavour asymmetry of the
quark--antiquark sea is generated nonperturbatively. This produces a strong
scale dependence of the nonsinglet structure function in an intermediate range
of $Q^2$. Evol... | 1994-03-09 | 2014-11-17 | [
"hep-ph"
] | R.D.Ball, V.Barone, S. Forte, M. Genovese |
hep-ph/9403243 | On determination of the large-${1\over x}$ gluon distribution at HERA | We discuss corrections to the Leading-Log$Q^{2}$ relationships between the
gluon density $g(x,Q^{2})$ and $F_{L}(x,Q^{2}),\,\partial F_{T}(x,Q^{2})
/\partial \log Q^{2}$ in the HERA range of large ${1\over x}$. We find that the
above quantities probe the gluon density $g(x,Q_{T,L}^{2})$ at
$Q_{T,L}^{2}=C_{T,L}Q^{2}$, w... | 1994-03-08 | 2009-10-28 | [
"hep-ph"
] | N.N. Nikolaev and B.G. Zakharov |
hep-ph/9403247 | Dynamical Generation of Mass | An alternative for the Higgs mechanism is proposed. It predicts the
appearance in the broken phase of a scalar background field which may be
interpreted as describing an almost uniform (i.e., homogeneous and isotropic)
superfluid condensate of decoupled Higgs bosons. Quantum fields acquire mass as
a consequence of nonp... | 1994-03-08 | 2008-02-03 | [
"hep-ph",
"astro-ph",
"cond-mat",
"hep-th"
] | V. Delgado |
hep-ph/9403244 | A New Method for Helicity Calculations | We propose a new helicity formalism based on the formal insertion in spinor
lines of a complete set of states build up with unphysical spinors. The method
is developed both for massless and massive fermions for which it turns out to
be particularly fast. All relevant formulae are given. | 1994-03-08 | 2009-10-28 | [
"hep-ph"
] | A. Ballestrero and E. Maina |
hep-ph/9403248 | Amplitude Zeros in $W^\pm Z$ Production | We demonstrate that the Standard Model amplitude for $f_1 \bar f_2
\rightarrow W^\pm Z $ at the Born-level exhibits an approximate zero located at
$\cos\theta = (g^{f_1}_{-} + g^{f_2}_{-}) / (g^{f_1}_{-} - g^{f_2}_{-})$ at
high energies, where the $g^{f_i}_{-}$ ($i=1,2$) are the left-handed couplings
of the $Z$-boson t... | 1994-03-08 | 2009-10-28 | [
"hep-ph"
] | U. Baur (FSU), T. Han and J. Ohnemus (UC Davis) |
hep-ph/9403245 | Scaling Laws in Hierarchical Clustering Models with Poisson
Superposition | Properties of cumulant- and combinant ratios are studied for multihadron
final states composed of Poisson distributed clusters. The application of these
quantities to ``detect'' clusters is discussed. For the scaling laws which hold
in hierarchical clustering models (void scaling, combinant scaling) a
generalization is... | 1994-03-08 | 2016-09-01 | [
"hep-ph",
"astro-ph"
] | S. Hegyi |
hep-ph/9403242 | How to measure the intercept of the BFKL pomeron at HERA | Determination of the intercept of the BFKL pomeron is one of the pressing
issues in the high energy physics. Earlier we have shown that, at the dipole
size $r=r_{\Delta}=(0.1-0.2)$f, the dipole cross section $\sigma(x,r)$ which is
a solution of the generalized BFKL equation, exhibits a precocious asymptotic
behavior $\... | 1994-03-08 | 2010-11-01 | [
"hep-ph"
] | N.N. Nikolaev and B.G. Zakharov |
hep-ph/9403246 | Top quark polarization as a probe of $t\bar{t}$ threshold dynamics | We study the spin properties of top quarks produced in collisions of
polarized photons in the threshold region. For a relatively heavy top quark the
influence of non-perturbative effects is small and its polarization parameters
can be predicted in perturbative QCD. The measurements of the top polarization
may allow a n... | 1994-03-08 | 2009-10-28 | [
"hep-ph"
] | V.S. Fadin, V.A. Khoze and M.I. Kotsky |
hep-ph/9403238 | Radiative Correction Schemes in Deep Inelastic Muon Scattering | A description and a detailed comparison of the Mo and Tsai and the Dubna
radiative correction schemes is presented. Numerical comparisons made in the
kinematical region of the NMC high energy deep inelastic electroproduction
experiment are discussed. An overall agreement between the two approaches in
the region of low ... | 1994-03-07 | 2016-08-14 | [
"hep-ph"
] | B. Bade{\l}ek, D. Bardin, K. Kurek and C. Scholz |
hep-ph/9403235 | Strong rescattering in K-> 3pi decays and low-energy meson dynamics | We present a consistent analysis of final state interactions in
${K\rightarrow 3\pi}$ decays in the framework of Chiral Perturbation Theory.
The result is that the kinematical dependence of the rescattering phases cannot
be neglected. The possibility of extracting the phase shifts from future
$K_S-K_L$ interference exp... | 1994-03-07 | 2014-11-17 | [
"hep-ph"
] | G. D'Ambrosio, G. Isidori, A. Pugliese and N. Paver |
hep-ph/9403237 | Single Dilepton Production at $e^+e^-$, $e\gamma$ and $\gamma\gamma$
Colliders | We calculate the cross sections for the single production of doubly-charged
dileptons, both scalar and vector, at $e^+e^-$, $e\gamma$ and $\gamma\gamma$
colliders at $\sqrt{s}=500$ GeV and 1 TeV. The $e\gamma$ mode is by far the
most promising -- dileptons whose coupling is as weak as
$O(10^{-4})\alpha_{em}$ can be obs... | 1994-03-07 | 2009-10-28 | [
"hep-ph"
] | N. Lepor\'e, B. Thorndyke, H. Nadeau and D. London |
hep-ph/9403240 | The complete radiative corrections to the gaugino and Higgsino masses in
the Minimal Supersymmetric Model | We determine the radiative corrections to the masses of the gauginos and
Higgsinos in the MSSM, including all sectors of the theory in a one-loop
calculation in the on-mass-shell renormalization scheme. We find that a gluino
which is massless at tree level receives a mass of between 0 and 3 GeV,
primarily due to the to... | 1994-03-07 | 2009-10-28 | [
"hep-ph"
] | Damien Pierce and Aris Papadopoulos |
hep-ph/9403236 | Leptoproduction of charm revisited | We calculate the energy--momentum distribution of the charmed quarks produced
in neutrino reactions on protons, quantifying the importance of mass and
current non--conservation effects. We study the strange and charm distributions
probed in neutrino interactions in the presently accessible kinematical region.
Some ambi... | 1994-03-07 | 2009-10-28 | [
"hep-ph"
] | V.Barone, M.Genovese, N.N.Nikolaev, E.Predazzi and B.G.Zakharov |
hep-ph/9403232 | The two-fermion relativistic wave equations of Constraint Theory in the
Pauli-Schr\"odinger form | The two-fermion relativistic wave equations of Constraint Theory are reduced,
after expressing the components of the $4\times 4$ matrix wave function in
terms of one of the $2\times 2$ components, to a single equation of the
Pauli-Schr\"odinger type, valid for all sectors of quantum numbers. The
potentials that are pre... | 1994-03-07 | 2009-10-28 | [
"hep-ph"
] | J. Mourad and H. Sazdjian |
hep-ph/9403239 | Gamma ray lines from TeV dark matter | We calculate, using unitarity, a lower bound on the branching ratio
$\chi\chi\to \gamma\gamma$ and $\chi\chi\to \gamma Z$, where $\chi$ is any halo
dark matter particle that has $W^+W^-$ as one of the major annihilation modes.
Examples of such particles are supersymmetric particles with a dominant
Higgsino component, o... | 1994-03-07 | 2010-11-30 | [
"hep-ph",
"astro-ph"
] | L. Bergstrom and J. Kaplan |
hep-ph/9403233 | Two- and Three-Point Functions in the Extended NJL Model | The two-point functions in generalized Nambu--Jona-Lasinio models are
calculated to all orders in momenta and quark masses to leading order in
$1/N_c$. The use of Ward identities and the heat-kernel expansion allows for a
large degree of regularization independence. We also show how this approach
works to the same orde... | 1994-03-07 | 2011-03-31 | [
"hep-ph",
"nucl-th"
] | Johan Bijnens and Joaquim Prades |
hep-ph/9403234 | How to Parametrize an S-Wave Resonance and How to Identify Two-Hadron
Composites | The question of how one can distinguish quark model states from 2-hadron
states near an S-wave theshold is discussed, and the usefulness of the running
mass is emphasized as the meeting ground for experiment and theory and for
defining resonance parameters. | 1994-03-07 | 2009-10-28 | [
"hep-ph"
] | Nils A. T\"ornqvist |
hep-ph/9403241 | $A_{LR}$, Negative $S$, and Extended Gauge Models | The implications of the recent measurement of the left-right asymmetry,
$A_{LR}$, by the SLD Collaboration for theories with extended gauge sectors is
examined. We show that it is possible to arrange for large, negative values of
$S$, based on an analysis of leptonic data, without serious side effects for
other observa... | 1994-03-07 | 2016-09-01 | [
"hep-ph"
] | Thomas G. Rizzo |
hep-ph/9403230 | Calculation of Feynman Diagrams from their Small Momentum Expansion | A new powerful method to calculate Feynman diagrams is proposed. It consists
in setting up a Taylor series expansion in the external momenta squared (in
general multivariable). The Taylor coefficients are obtained from the original
diagram by differentiation and putting the external momenta equal to zero,
which means a... | 1994-03-05 | 2011-08-17 | [
"hep-ph"
] | J.Fleischer and O.V.Tarasov |
hep-ph/9403228 | Anomalous Thresholds and the Isgur-Wise Function | The original de Rafael-Taron bound on the slope of the Isgur-Wise function at
zero recoil is known to be violated in QCD by singularities appearing in an
unphysical region. To be consistent, quark models must have corresponding
singularity structures. In an existing relativistic quark-loop model, the
meson-quark-antiqu... | 1994-03-04 | 2009-10-28 | [
"hep-ph"
] | B. Holdom and M. Sutherland |
hep-ph/9403226 | One-Loop n-Point Gauge Theory Amplitudes, Unitarity and Collinear Limits | We present a technique which utilizes unitarity and collinear limits to
construct ansatze for one-loop amplitudes in gauge theory. As an example, we
obtain the one-loop contribution to amplitudes for $n$ gluon scattering in
$N=4$ supersymmetric Yang-Mills theory with the helicity configuration of the
Parke-Taylor tree ... | 1994-03-04 | 2009-09-25 | [
"hep-ph",
"hep-th"
] | Z. Bern, L. Dixon, D.C. Dunbar and D.A. Kosower |
hep-ph/9403231 | The Renormalization of Composite Operators in Yang-Mills Theories Using
General Covariant Gauge | Essential to QCD applications of the operator product expansion, etc., is a
knowledge of those operators that mix with gauge-invariant operators. A
standard theorem asserts that the renormalization matrix is triangular:
Gauge-invariant operators have `alien' gauge-variant operators among their
counterterms, but, with a... | 1994-03-04 | 2009-10-28 | [
"hep-ph",
"hep-th"
] | John C. Collins and Randall J. Scalise |
hep-ph/9403229 | Virtual Photon Strucutre Functions and the Parton Content of the
Electron | We point out that in processes involving the parton content of the photon the
usual effective photon approximation should be modified. The reason is that the
parton content of virtual photons is logarithmically suppressed compared to
real photons. We describe this suppression using several simple, physically
motivated ... | 1994-03-04 | 2011-07-19 | [
"hep-ph"
] | Manuel Drees (Univ. of Wisconsin) and Rohini M. Godbole (Bombay Univ.) |
hep-ph/9403225 | QSSR estimate of the $B_B$ parameter at next-to-leading order | We compute the leading $\alpha_s$ corrections to the two-point correlator of
the $O_{\Delta B=2}$ operator which controls the $B^0 \bar B^0$ mixing. Using
this result within the QCD spectral sum rules approach and some
phenomenologically reasonable assumptions in the parametrization of the
spectral function, we conclud... | 1994-03-04 | 2010-11-01 | [
"hep-ph"
] | S. Narison and A.A. Pivovarov |
hep-ph/9403227 | Intrinsic transverse momentum and the polarized Drell-Yan process | In this paper we study the cross section at leading order in $1/Q$ for
polarized Drell-Yan scattering at measured lepton-pair transverse momentum
$Q_T$. We find that for a hadron with spin $1/2$ the quark content at leading
order is described by six distribution functions for each flavor, which depend
on both the light... | 1994-03-04 | 2011-05-05 | [
"hep-ph",
"nucl-th"
] | R.D. Tangerman and P.J. Mulders |
hep-ph/9403222 | Exact Construction of the Electromagnetic Current Operator for
Relativistic Composite Systems | The electromagnetic current operator of a composite system must be a
relativistic vector operator satisfying current conservation, cluster
separability and the condition that interactions between the constituents do
not renormalize the total electric charge. Assuming that these interactions are
described in the framewo... | 1994-03-03 | 2015-06-25 | [
"hep-ph"
] | Felix M. Lev |
hep-ph/9403219 | Finite Temperature Effective Potential to Order $g^4,\la^2$ and the
Electroweak Phase Transition | The standard model effective potential is calculated at finite temperature to
order $g^4,\la^2$ and a complete zero temperature renormalization is performed.
In comparison with lower order calculations the strength of the first order
phase transition has increased dramatically. This effect can be traced back to
infrare... | 1994-03-03 | 2009-10-28 | [
"hep-ph",
"hep-lat"
] | Z. Fodor and A. Hebecker |
hep-ph/9403220 | A New Paradigm for the Fermion Generations | A new mechanism is proposed to explain the appearance of the three known
fermion generations in a natural way. The underlying idea is based on the
discreteness of the spectrum of solutions of the gap equation appearing in
models of dynamical chiral symmetry breaking. Within such a framework, the
number of parameters ne... | 1994-03-03 | 2008-02-03 | [
"hep-ph"
] | George Triantaphyllou (University of Toronto) |
hep-ph/9403216 | Level Crossing Along Sphaleron Barriers | In the electroweak sector of the standard model topologically inequivalent
vacua are separated by finite energy barriers, whose height is given by the
sphale\-ron. For large values of the Higgs mass there exist several sphaleron
solutions and the barriers are no longer symmetric. We construct paths of
classical configu... | 1994-03-03 | 2009-10-28 | [
"hep-ph"
] | Jutta Kunz and Yves Brihaye |
hep-ph/9403223 | Charge symmetry breaking via rho-omega mixing from model quark-gluon
dynamics | The quark-loop contribution to the $\rho^0-\omega$ mixing self-energy
function is calculated using a phenomenologically successful QCD-based model
field theory in which the $\rho^0$ and $\omega$ mesons are composite $\bar{q}q$
bound states. In this calculation the dressed quark propagator, obtained from a
model Dyson-S... | 1994-03-03 | 2010-03-04 | [
"hep-ph",
"nucl-th"
] | K. L. Mitchell, P. C. Tandy, C. D. Roberts and R. T. Cahill |
hep-ph/9403218 | Orsay lectures on confinement (I) | This is the first lecture of a serie on a theory of confinement, devoted to
the mechanism of supercharged nuclei as a model for particle binding. | 1994-03-03 | 2007-05-23 | [
"hep-ph"
] | V. N. Gribov |
hep-ph/9403221 | Does the effective Lagrangian for low-energy QCD scale? | QCD is not an approximately scale invariant theory. Hence a dilaton field is
not expected to provide a good description of the low-energy dynamics
associated with the gluon condensate. Even if such a field is introduced, it
remains almost unchanged in hadronic matter at normal densities. This is
because the large glueb... | 1994-03-03 | 2011-08-11 | [
"hep-ph",
"nucl-th"
] | Michael C. Birse |
hep-ph/9403224 | Dyson-Schwinger Equations and the Application to Hadronic Physics | We review the current status of nonperturbative studies of gauge field theory
using the Dyson-Schwinger equation formalism and its application to hadronic
physics. We begin with an introduction to the formalism and a discussion of
renormalisation in this approach. We then review the current status of studies
of Abelian... | 1994-03-03 | 2008-11-26 | [
"hep-ph",
"nucl-th"
] | C. D. Roberts and A. G. Williams |
hep-ph/9403217 | Supersymmetric Singlet Majorons and Cosmology | We examine cosmological constraints on the lepton number breaking scale in
supersymmetric singlet majoron models. Special attention is drawn to the model
dependence arising from the particular choice of a certain majoron extension
and a cosmological scenario. We find that the bounds on the symmetry breaking
scale can v... | 1994-03-03 | 2009-10-28 | [
"hep-ph"
] | E. J. Chun, H. B. Kim and A. Lukas |
hep-ph/9403215 | Cosmic Strings and Electroweak Baryogenesis | The electroweak symmetry is unbroken in the core of cosmic strings
originating from a symmetry breaking at an energy higher than the electroweak
scale $\eta_{EW}$. The dynamics of such strings may generate a baryon asymmetry
below the electroweak symmetry breaking scale. This mechanism for electroweak
baryogenesis is m... | 1994-03-03 | 2010-11-01 | [
"hep-ph",
"astro-ph"
] | R. Brandenberger (Brown), A.-C. Davis (DAMTP, Cambridge) and M.
Trodden (Brown) |
hep-ph/9403211 | Pepturbative and Nonperturbative Aspects of Exclusive Processes | Invited talk presented at the Workshop on Quantum Field Theoretical Aspects
of High Energy Physics, Kyffh\"auser, Germany, September 20-24, 1993; to be
published in the Proceedings. | 1994-03-02 | 2009-09-25 | [
"hep-ph"
] | N. G. Stefanis and M. Bergmann |
hep-ph/9403212 | Bottom-Tau Yukawa Unification in the Next-to-Minimal Supersymmetric
Standard Model | We discuss the unification of the bottom quark and tau lepton Yukawa
couplings within the framework of the next-to-minimal supersymmetric standard
model. We compare the allowed regions of the $m_t$-$\tan \beta$ plane to those
in the minimal supersymmetric standard model, and find that over much of the
parameter space t... | 1994-03-02 | 2009-10-28 | [
"hep-ph"
] | B.C. Allanach and S.F. King (Physics Dept, University of Southampton,
Southampton) |
hep-ph/9403207 | About the Bethe Salpeter Formalism in the Heavy Mass Limit | We investigate the Bethe--Salpeter description of mesons in the limit where
one of the constituing quarks is infinitely heavy. To recover the
non--relativistic quark model out of the Bethe--Salpeter formalism it is usual
to assume that the potential is instantaneous and the Fock space is reduced to
$Q\bar{q}$ states. W... | 1994-03-02 | 2010-11-01 | [
"hep-ph"
] | A. Wambach |
hep-ph/9403210 | Evolution Effects on the Nucleon Distribution Amplitude | We study the Brodsky-Lepage evolution equation for the nucleon and construct
an eigenfunction basis by including contributions of up to polynomial order
$9$. By exployting the permutation symmetry $P_{13}$ of these eigenfunctions, a
basis of symmetrized Appell polynomials can be constructed in which the
diagonalization... | 1994-03-02 | 2009-09-25 | [
"hep-ph"
] | M. Bergmann and N. G. Stefanis |
hep-ph/9403213 | Generalised Factorial Moments and QCD Jets | { In this paper we present a natural and comprehensive generalisation of the
standard factorial moments ($\clFq$) analysis of a multiplicity distribution.
The Generalised Factorial Moments are defined for all $q$ in the complex plane
and, as far as the negative part of its spectrum is concerned, could be useful
for the... | 1994-03-02 | 2015-06-25 | [
"hep-ph"
] | P.Duloos and J.-L. Meunier |
hep-ph/9403209 | Heterotic Approach to the Nucleon Distribution Amplitude | We give an in-depth analysis of the determination procedure of the recently
proposed heterotic nucleon distribution amplitude which hybridizes the best
features of the Chernyak-Ogloblin-Zhitnitsky and the Gari-Stefanis models. With
respect to the QCD sum-rule constraints, optimized versions of these amplitudes
are deri... | 1994-03-02 | 2009-10-28 | [
"hep-ph"
] | M. Bergmann and N. G. Stefanis |
hep-ph/9403206 | {\bf Consitutent Quarks, Chiral Symmetry and the Nucleon Spin$^{1, 2}$} | It is argued that the constituent quarks are expected to show a non-- trivial
spin and flavor structure, due to the anomalous breaking of the chiral symmetry
in the U(1) sector. CERN--TH.7079/93\\ | 1994-03-02 | 2007-05-23 | [
"hep-ph"
] | H. Fritzsch |
hep-ph/9403214 | Astrophysical Searches For Exotic Phenomena In Ultrahigh Energy
Neutrino-Nucleon Scattering | We investigate the potential of near-future neutrino telescopes like NESTOR
for searches for exotic processes in ultrahigh energy neutrino-quark
scattering. (NESTOR is the acronym for NEutrinos, from Supernovae and TeV
sources, Ocean Range ... a water Cherenkov detector to be constructed in the
Mediterranean off the co... | 1994-03-02 | 2007-05-23 | [
"hep-ph"
] | D.A. Morris and A. Ringwald |
hep-ph/9403208 | Hadrons with Charm and Beauty | By combining potential models and QCD spectral sum rules (QSSR), we discuss
the spectroscopy of the $(b\bar c)$ mesons and of the $(bcq)$, $(ccq)$ and
$(bbq)$ baryons (${q}\equiv {d}$ or $s$), the decay constant and the
(semi)leptonic decay modes of the $B_c$ meson. For the masses, the best
predictions come from potent... | 1994-03-02 | 2014-09-17 | [
"hep-ph"
] | E.Bagan, H.G.Dosch, P.Gosdzinsky, S.Narison and J.M.Richard |
hep-ph/9403201 | An SO(10)XS-4 Scenario for Naturally Degenerate Neutrinos | The simplest scenario for the three known light neutrinos that fits the solar
and atmospheric neutrino deficit and a mixed dark matter (MDM) picture of the
universe requires them to be highly degenerate with $m_{\nu} \sim$ 1 - 2 eV. We
propose an SO(10) grand unified model with an S$_{4}$-horizontal symmetry that
leads... | 1994-03-01 | 2009-10-28 | [
"hep-ph"
] | D. G. Lee and R. N. Mohapatra (University of Maryland) |
hep-ph/9403202 | A Supersymmetric Effective Chiral Lagrangian | We construct in a manifestly supersymmetric form the leading and subleading
terms in momentum for an effective supersymmetric chiral Lagrangian in terms of
complex pions and their superpartners. A soft supersymmetry breaking term is
included and below the supersymmetry breaking scale the Lagrangian reduces to
the usual... | 1994-03-01 | 2009-10-28 | [
"hep-ph"
] | K.J. Barnes, D.A. Ross and R.D. Simmons |
hep-ph/9403204 | Multiple Gluon Effects in Fermion--(Anti)Fermion Scattering at SSC/LHC
Energies | We extend the methods of Yennie, Frautschi and Suura (YFS) to compute, via
Monte Carlo methods, the effects of multiple gluon emission in the processes
$q+q'\to q''+q'''+n(G)$, where $G$ is a soft gluon. We show explicitly that the
infrared singularities in the respective simulations are canceled to all orders
in $\alp... | 1994-03-01 | 2014-11-17 | [
"hep-ph"
] | D.B. DeLaney, S. Jadach, Ch. Shio, G. Siopsis, and B.F.L. Ward |
hep-ph/9402364 | Heavy Quark Effective Theory beyond Perturbation Theory: Renormalons,
the Pole Mass and the Residual Mass Term | We study the asymptotic behaviour of the perturbative series in the heavy
quark effective theory (HQET) using the $1/N_f$ expansion. We find that this
theory suffers from an {\it ultraviolet} renormalon problem, corresponding to a
non-Borel-summable behaviour of perturbation series in large orders, and
leading to a pri... | 1994-03-01 | 2009-10-28 | [
"hep-ph"
] | M.Beneke and V.M.Braun |
hep-ph/9403203 | Missing (up) Mass, Accidental Anomalous Symmetries, and the Strong CP
Problem | We reconsider the massless up quark solution of the strong CP problem. We
show that an anomaly free horizontal symmetry can naturally lead to a massless
up quark and to a corresponding accidental anomalous symmetry. Reviewing the
controversy about the phenomenological viability of $m_u=0$ we conclude that
this possibli... | 1994-03-01 | 2007-05-23 | [
"hep-ph"
] | Tom Banks, Yosef Nir and Nathan Seiberg |
hep-ph/9402363 | QCD corrections to inclusive $\Delta S=1,2$ transitions at the
next-to-leading order | The 2--point functions for $\Delta S=1$ current-current and QCD-penguin
operators, as well as for the $\ds$ operator, are calculated at the
next-to-leading order. The calculation is performed in two different
renormalization schemes for $\gamma_5$, and the compatibility of the results
obtained in the two schemes is ver... | 1994-03-01 | 2009-10-28 | [
"hep-ph"
] | Matthias Jamin, Antonio Pich |
hep-ph/9402362 | Complete O(alpha_s^2) Corrections to (2+1) Jet Cross Sections in Deep
Inelastic Scattering | Complete next-to leading order QCD predictions for (2+1) jet cross sections
and jet rates in deep inelastic scattering (DIS) based on a new parton level
Monte Carlo program are presented. All relevant helicity contributions to the
total cross section are included. Results on total jet cross sections as well
as differen... | 1994-02-28 | 2009-10-28 | [
"hep-ph"
] | T. Brodkorb and E. Mirkes |
hep-ph/9403205 | Particle Physics Bounds from the Hulse-Taylor Binary | The orbital period of the binary pulsar PSR 1913+16 has been observed to
decrease at the rate of $2.40\times 10^{-12}$ s/s which agrees with the
prediction of the quadropole formula for gravitational radiation to within one
percent. The decrease in orbital period may also occur by radiation of other
massless particles ... | 1994-02-28 | 2010-11-01 | [
"hep-ph",
"astro-ph",
"gr-qc"
] | Subhendra Mohanty and Prafulla Kumar Panda |
hep-ph/9402361 | The Nonabelian Screening Potential Beyond the Leading Order | The nonabelian screening potential is calculated in the temporal axial gauge.
The Slavnov-Taylor identity is used to construct the three-gluon vertex
function from the inverse gluon propagator. After solving the Schwinger - Dyson
equation beyond leading order we find that the obtained momentum dependence of
the gluon s... | 1994-02-27 | 2009-10-28 | [
"hep-ph"
] | R. Baier and O. K. Kalashnikov |
hep-ph/9402360 | The Pole Mass of The Heavy Quark. Perturbation Theory and Beyond | The key quantity of the heavy quark theory is the quark mass $m_Q$. Since
quarks are unobservable one can suggest different definitions of $m_Q$. One of
the most popular choices is the pole quark mass routinely used in perturbative
calculations and in some analyses based on heavy quark expansions. We show that
no preci... | 1994-02-27 | 2010-11-01 | [
"hep-ph"
] | I.I. Bigi, M.A. Shifman, N.G. Uraltsev, A.I. Vainshtein |
hep-ph/9402359 | Neutrino Mass | We review the issue of neutrino mass by concentrating on the minimal
extensions of the standard model. In particular, we emphasize the role that
gravitation may play in this regard and discuss the central aspects of the
see-saw mechanism of generating neutrino mass, including the possibility of the
see-saw scale being ... | 1994-02-26 | 2007-05-23 | [
"hep-ph"
] | Goran Senjanovi\'c |
hep-ph/9402357 | Dynamical Symmetry Breaking in an E_6 GUT Model | Dynamical symmetry breaking is studied in an E_6 GUT model of a single
generation of fermions with strong 4-fermi interactions. The effective
potential is analyzed analytically by the help of Michel's conjecture and the
result is confirmed numerically. We find that the E_6 symmetry is spontaneously
broken either to F_4... | 1994-02-26 | 2017-02-01 | [
"hep-ph"
] | Taichiro KUGO and Joe SATO |
hep-ph/9402358 | Signals of $CP$ violation in Higgs decay | We consider an extension of the Standard Model where some Higgs particle is
not an eigenstate of $CP$, and discuss the possibility of extracting signals of
the resulting $CP$ violation. In the case of Higgs decay to four fermions we
study correlations among momenta of the final-state fermions. We discuss
observables wh... | 1994-02-26 | 2010-11-01 | [
"hep-ph"
] | Arild Skjold and Per Osland |
hep-ph/9402351 | DTUJET--93 Sampling inelastic proton--proton and antiproton--proton
collisions according to the two--component Dual Parton Model | A new version of a Monte Carlo Program for hadronic multi-particle production
is presented. It is based on the two-component Dual Parton Model which includes
the dual topological unitarization of soft and hard cross sections. The model
treats both soft (low $p_{\perp}$) and hard (minijet, large $p_{\perp}$)
processes i... | 1994-02-25 | 2009-10-28 | [
"hep-ph"
] | P. Aurenche F. W. Bopp R. Engel D. Pertermann J. Ranft and S. Roesler |
hep-ph/9402349 | A Vision for High Energy Physics | Following the termination of the Superconducting Super Collider, there is an
urgent need to develop a strategic plan for the future of high energy physics
and an accompanying vision to guide the priorities of the U.S. program. This
document proposes such a strategic plan and presents a singular opportunity for
the U.S.... | 1994-02-25 | 2009-09-25 | [
"hep-ph"
] | T. Kamon, J. Lopez, P. McIntyre, and J. White |
hep-ph/9402350 | Theoretical Expectations For High Mass Photon Pairs in L+ L- Gamma Gamma
Events at LEP/SLC | Recently, the L3 collaboration has reported the observation of four events in
the reactions e+ e- --> L+ L- + (2 Photons), L = e, mu, tau, with the invariant
photon pair mass near 60 GeV in a data sample collected in the L3 detector
corresponding to 950,000 produced Z0's. More recently, more data from the other
LEP col... | 1994-02-25 | 2009-12-30 | [
"hep-ph"
] | S. Jadach, B.F.L. Ward and S.A. Yost |
hep-ph/9402352 | On the Singular Behaviour of Structure Functions at Low X | We discuss the phenomenological extraction of the leading $ j$-plane
singularity from singlet structure functions $ F_s $ measured at small $ x. $
Using a saddle-point method we show that $ {\rm d ln} F_s /{\rm d ln}{1 \over
x} $ is a suitable observable for this purpose in the region $x \le 10^{-2}.$
As an application... | 1994-02-25 | 2010-03-25 | [
"hep-ph"
] | H. Navelet, R. Peschanski, S. Wallon |
hep-ph/9402355 | Solar and atmospheric neutrinos | Possible explanations of solar neutrino and atmospheric neutrino anomalies
are summarized and future tests discussed. | 1994-02-25 | 2007-05-23 | [
"hep-ph"
] | Sandip Pakvasa |
hep-ph/9402353 | Implications of Recent Nucleon Spin Structure Measurements for
Neutralino Dark Matter Detection | Predicted rates for direct and indirect detection of dark-matter neutralinos
depend in general on the spin content of the nucleon. Neutralinos that are
predominantly $B$-ino are the likeliest candidates for detection via
spin-dependent interactions. Uncertainties in the measured spin content of the
nucleon may lead to ... | 1994-02-25 | 2008-02-03 | [
"hep-ph",
"astro-ph",
"nucl-th"
] | Marc Kamionkowski, Lawrence M. Krauss, and M. Ted Ressell |
hep-ph/9402354 | The Isospin Splittings of Heavy-Light Quark Systems | The mass splittings of the pseudoscalar and vector D and B light-heavy quark
systems have been calculated using the method of QCD sum rules.
Electromagnetic, quark mass, and nonperturbative QCD effects are all included.
The results are in good agreement with experiment. A measurement of isospin
splitting for the vector... | 1994-02-25 | 2009-09-25 | [
"hep-ph"
] | Leonard S. Kisslinger and Zhenping Li |
hep-ph/9402356 | Corrections to mass scale predictions in SO(10) GUT with higher
dimensional operators | We calculate the two loop contribution to the predictions of the mass scales
in an SO(10) grand unified theory. We consider the modified unification scale
boundary conditions due to the non-renormalizable higher dimensional terms
arising from quantum gravity or spontaneous compactification of extra
dimensions in Kaluza... | 1994-02-25 | 2019-08-17 | [
"hep-ph"
] | Alakabha Datta, Sandip Pakvasa and Utpal Sarkar |
hep-ph/9402347 | Direct CP Violation in K_L --> \pi^0 e^+e^- Beyond Leading Logarithms | We analyze the direct CP violation in the rare decay K_L --> Pi^0 e+e- with
QCD effects taken into account consistently in the next-to-leading order. We
calculate the two-loop mixing between the four-quark \Delta S=1 operators and
the operator Q_7V = (sd)_(V-A)(ee)_V in the NDR and HV renormalization schemes.
Using the... | 1994-02-24 | 2010-11-01 | [
"hep-ph"
] | A.J. Buras, M.E. Lautenbacher, M. Misiak and M. M"unz |
hep-ph/9402345 | High Precision $J/\psi$ and $\Upsilon$-production data and the Nuclear
Glue | We use the high statistics E-772 data on the nuclear dependence of the
production of quarkonia $(J/\psi$ and $\Upsilon)$ and dimuons at large
transverse momentum $(p_T)$ in $p$-$A$ collisions to get information about the
gluonic EMC effect. We find a satisfactory quantitative agreement of the
theoretical predictions wi... | 1994-02-24 | 2009-09-25 | [
"hep-ph"
] | R.V. Gavai and R.M. Godbole |
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