id large_stringlengths 9 16 | title large_stringlengths 1 382 | abstract large_stringlengths 3 6.09k | publish_date date32 | update_date date32 | categories large listlengths 1 13 | authors large_stringlengths 3 62.8k |
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hep-ph/9409420 | Cosmological Constant and Supergravity Soft Terms | In supergravity models, the quantum correction to the vacuum energy can be of
order $M_I^4$, if the cutoff is of order the Planck mass $M^2_{P}$ and $Str\
{\cal M}^2\ne 0$. Therefore, the tree level cosmological constant must be
nonzero (probably negative). Since the current practice of calculating soft
parameters in s... | 1994-09-27 | 2009-09-25 | [
"hep-ph"
] | Jihn E. Kim |
hep-ph/9409423 | Foundations and Scope of Chiral Perturbation Theory | The aim of this introductory lecture is to review the arguments, according to
which the symmetry properties of the strong interaction reveal themselves at
low energies. I first discuss the symmetries of QCD, then sketch the method
used to work out their implications and finally take up a few specific issues,
where new ... | 1994-09-27 | 2009-10-28 | [
"hep-ph"
] | H. Leutwyler |
hep-ph/9409426 | The Chiral Lagrangian parameters, $\overline{\ell}_1$,
$\overline{\ell}_2$, are determined by the $\rho$--resonance | The all--important consequence of Chiral Dynamics for $\pi \pi$ scattering is
the Adler zero, which forces $\pi \pi$ amplitudes to grow asymptotically. The
continuation of this subthreshold zero into the physical regions requires a
$P$--wave resonance, to be identified with the $\rho$. It is a feature of $\pi
\pi$ scat... | 1994-09-27 | 2009-10-28 | [
"hep-ph"
] | M.R. Pennington, J. Portoles |
hep-ph/9409427 | Heavy Quarks from QCD Spectral Sum Rules | We summarize the recent developments on the extraction of the dynamical
properties of the heavy quarks from QCD spectral sum rules. | 1994-09-27 | 2010-11-01 | [
"hep-ph",
"hep-lat"
] | Stephan Narison |
hep-ph/9409424 | Searching for Exotic Mesons in e^+e^- Annihilation at Dafne | $DA{\Phi}NE$ should be useful for testing the nature of the vector mesons
directly produced in $e^-e^+$ annihilation, as well as the nature of the $C=+$
states produced in the radiative decays of these vector mesons. In the
$DA{\Phi}NE$ energy range, these latter states may have spin up to two and any
parity. Provided ... | 1994-09-27 | 2009-10-28 | [
"hep-ph"
] | F.E.Close and G.J.Gounaris |
hep-ph/9409421 | Sources of CP Violation in the Two-Higgs Doublet Model | Assuming CP violation arises solely through the Higgs potential, we develop
the most general two-Higgs doublet model. There is no discrete symmetry that
distinguishes the two Higgs bosons. It is assumed that an approximate global
family symmetry sufficiently suppresses flavor-changing neutral scalar
interactions. In ad... | 1994-09-27 | 2010-11-01 | [
"hep-ph"
] | Yue-Liang Wu and Lincoln Wolfenstein |
hep-ph/9409409 | Bose_einstein Correlations of Unstable Particles | Within a field theoretical formalism suited to treat inhomogeneous hot
quantum systems, we derive the two-particle correlation function for particles
having a spectral width gamma in the region of their emission. We find, that
this correlation function measures the radius R0 of the thermal source only in
case gamma*R0 ... | 1994-09-26 | 2009-09-25 | [
"hep-ph"
] | P.A.Henning and Ch.Hoelbling |
hep-ph/9409418 | Transverse tau polarization in inclusive $\bar B\to \tau \bar\nu X$
decays | We calculate, in the framework of multi Higgs doublet models, the $CP$
violating transverse tau polarization, $P_\perp$, in inclusive semileptonic $B$
meson decays. We find that $P_\perp$ diverges at ${\cal O}(1/m_b^2)$ of the
heavy quark expansion. We discuss the physical reasons for this divergence and
show how to re... | 1994-09-26 | 2010-11-01 | [
"hep-ph"
] | Yuval Grossman and Zoltan Ligeti |
hep-ph/9409419 | Measures of fine tuning | Fine-tuning criteria are frequently used to place upper limits on the masses
of superpartners in supersymmetric extensions of the standard model. However,
commonly used prescriptions for quantifying naturalness have some important
shortcomings. Motivated by this, we propose new criteria for quantifying fine
tuning that... | 1994-09-26 | 2009-09-25 | [
"hep-ph",
"hep-th"
] | Greg Anderson and Diego Castano (MIT) |
hep-ph/9409417 | On the determination of the relative sign of $a_1$ and $a_2$ from
polarization measurements in $B^- \rightarrow \rho^- {D^*}^o$ decay | We point out that polarization measurements such as the longitudinal fraction
and the transverse left-right asymmetry in the Bauer-Stech-Wirbel (BSW) class
III processes involving two final vector mesons, $B^- \ra \rho^- {D^*}^o$ taken
as an example, are useful in determining the relative sign as well as the
relative m... | 1994-09-26 | 2009-10-28 | [
"hep-ph"
] | Y. Y. Keum |
hep-ph/9409413 | Phase Structure of Four-Fermion Theories at Finite Temperature and
Chemical Potential in Arbitrary Dimensions | The phase structure of four-fermion theories is thoroughly investigated with
varying temperature and chemical potential for arbitrary space-time dimensions
$(2 \leq D < 4)$ by using the 1/N expansion method. It is shown that the chiral
symmetry is restored in the theory under consideration for sufficiently high
tempera... | 1994-09-26 | 2009-10-28 | [
"hep-ph",
"hep-th"
] | T.Inagaki, T.Kouno and T.Muta |
hep-ph/9409410 | Parton Distributions for Low Q^2 | We extend the MRS(A) set of parton distributions, which provides an
up-to-date description of the structure of the proton probed by hard
interactions, into the region of $Q^2$ below $5\ {\rm GeV}^2$. After
physically-motivated modifications, we obtain a smooth description of the data
on the structure function $F_2(x,Q^... | 1994-09-26 | 2009-10-28 | [
"hep-ph"
] | AD Martin, WJ Stirling and RG Roberts |
hep-ph/9409416 | Polarized Structure Functions: Theory and Phenomenology | We review the theory of polarized structure functions measured in
deep-inelastic lepton-nucleon scattering, focusing on the most recent
developments. We concentrate on the structure function $g_1$, emphasizing the
phenomenological problems related to the extraction of the proton and neutron
$g_1(x,Q^2)$ from the data, ... | 1994-09-26 | 2009-09-25 | [
"hep-ph"
] | Stefano Forte (CERN, Geneva) |
hep-ph/9409414 | Low Energy Thresholds and the Scalar Mass Spectrum in Minimal
Supersymmetry | We discuss low energy threshold effects and calculate the sparticle masses in
the context of the Minimal Supersymmetric Standard Model. We pay particular
attention to the top squark and the Higgs mass parameters, and calculate the
top Yukawa corrections, taking into account the successive decoupling of each
particle at... | 1994-09-26 | 2009-10-28 | [
"hep-ph"
] | G. K. Leontaris and N.D. Tracas |
hep-ph/9409408 | Extraction of $a_1$ and $a_2$ from $B\to \psi K(K^*),~ D(D^*)\pi(\rho)$
Decays | Based on the factorization approach, we show that the CLEO data for the ratio
$\Gamma(B\to\psi K^*)/\Gamma(B\to \psi K)$ and the CDF measurement of the
fraction of longitudinal polarization in $B\to\psi K^*$ can be accounted for by
the heavy-flavor-symmetry approach for heavy-light form factors provided that
the form f... | 1994-09-26 | 2016-09-01 | [
"hep-ph"
] | Hai-Yang Cheng and B. Tseng |
hep-ph/9409415 | Covariant and Heavy Quark Symmetric Quark Models | There exist relativistic quark models (potential or MIT-bag) which satisfy
the heavy quark symmetry (HQS) relations among meson decay constants and form
factors. Covariant construction of the momentum eigenstates, developed here,
can correct for spurious center-of-mass motion contributions.Proton form factor
and M1 tra... | 1994-09-26 | 2014-11-17 | [
"hep-ph"
] | D.Tadi\'c and S.\v{Z}ganec |
hep-ph/9409406 | Dynamical Chiral-Symmetry Breaking in the Dual Ginzburg-Landau Theory | We study the effect of QCD-monopole condensation on the dynamical
chiral-symmetry breaking by using the dual Ginzburg-Landau theory of QCD. We
formulate the Schwinger-Dyson equation and solve it numerically. The large
enhancement is found for the chiral-symmetry breaking due to QCD-monopole
condensation, which suggests... | 1994-09-25 | 2007-05-23 | [
"hep-ph"
] | Shoichi Sasaki(RCNP), Hideo Suganuma(RIKEN) and Hiroshi Toki(TMU,
RIKEN) |
hep-ph/9409407 | Color Confinement and Dynamical Effect of Light Quarks in the Dual
Ginzburg-Landau Theory | We study nonperturbative features of QCD using the dual Ginzburg-Landau
theory. The color confinement is realized through the dual Higgs mechanism,
which is brought by QCD-monopole condensation. We investigate the infrared
screening effect on the color confinement due to the light-quark pair creation.
By solving the Sc... | 1994-09-25 | 2007-05-23 | [
"hep-ph"
] | Hideo Suganuma(RIKEN), Shoichi Sasaki(RCNP) and Hiroshi
Toki(TMU,RIKEN) |
hep-ph/9409411 | Deuteron Electromagnetic Form Factors in the Transitional Region Between
Nucleon-Meson and Quark-Gluon Pictures | Experimental observables of the elastic eD-scattering in the region of
intermediate energies are discussed. We offer the analysis of the available
experimental data, which reproduces the results of the calculations with
popular $NN$-potentials at low energies ($Q^2\ll 1(GeV/c)^2$), but, at the same
time, provides the r... | 1994-09-24 | 2009-09-25 | [
"hep-ph"
] | A.P.Kobushkin and A.I.Syamtomov |
hep-ph/9409401 | Renormalization of the Electroweak Theory in the Background Field Method | The applicability of the background field method in spontaneously broken
gauge theories is examined with new features emphasized. An explicit one loop
analysis in the electroweak theory shows that the method can be consistently
implemented in the on-shell renormalization scheme, and that the choice of the
background ga... | 1994-09-24 | 2009-09-25 | [
"hep-ph"
] | Xiaoyuan Li and Yi Liao |
hep-ph/9409404 | Nuclear Null Tests for Spacelike Neutrinos | Recently, a type of null experiment for spacelike neutrinos has been
proposed. We examine in detail a class of null tests involving nuclear beta
decay or capture in atoms and ions. The most promising candidate systems are
identified. | 1994-09-24 | 2009-09-25 | [
"hep-ph",
"nucl-th"
] | Alan Chodos and Alan Kostelecky, IUHET 280 |
hep-ph/9409412 | Present and future searches with e^+e^- colliders for the neutral Higgs
bosons of the Minimal Supersymmetric Standard Model -- the complete 1-loop
analysis | New mass regions unexcluded by direct searches are revealed by an analysis of
experimental results from LEP1 using full 1-loop diagrammatic calculations of
radiative corrections in the MSSM. Simulations of experimental signal
efficiencies and background rejection factors, and full 1-loop calculations are
combined to st... | 1994-09-24 | 2011-04-15 | [
"hep-ph"
] | J. Rosiek, A. Sopczak |
hep-ph/9409405 | Anomalous dimension of the gluon operator in pure Yang-Mills theory | We present new one loop calculations that confirm the theorems of Joglekar
and Lee on the renormalization of composite operators. We do this by
considering physical matrix elements with the operators inserted at non-zero
momentum. The resulting IR singularities are regulated dimensionally. We show
that the physical mat... | 1994-09-24 | 2009-10-28 | [
"hep-ph",
"hep-th"
] | B.W. Harris and J. Smith |
hep-ph/9409403 | Mesons with a Light Quark-Antiquark Pair and the Bethe-Salpeter Equation | The light quark-antiquark scattering Green's function is considered near a
meson resonance peak. The Bethe-Salpeter equation is used to write formal
expressions for the resonance width/mass ratio. Arguments are made concerning
to what extent this ratio can be calculated perturbatively, and an upper bound
is placed on t... | 1994-09-24 | 2008-02-03 | [
"hep-ph"
] | Dean Lee |
hep-ph/9409400 | Solar Neutrino Oscillations in the Moon | The first three quarters of this paper consists of a pedagogical review of
neutrino oscillations, including vacuum oscillations, constant density matter
oscillations and variable density matter oscillations. We then address the
question of whether MSW solar neutrino oscillations in the moon could be
observed during a s... | 1994-09-23 | 2009-09-25 | [
"hep-ph"
] | Brian Mason and Marc Sher |
hep-ph/9409395 | Model independent constraints on anomalous gauge boson self-couplings
from $e^+e^-$ colliders with longitudinally polarized beams | We explore the possibility of deriving model independent limits on the
anomalous trilinear electroweak gauge boson couplings from high energy
$e^+e^-\to W^+W^-$, by combining the cross sections for the different initial
and final states polarizations integrated with suitable kinematical cuts. In
the case of the CP cons... | 1994-09-23 | 2010-11-01 | [
"hep-ph"
] | A.A.Pankov and N.Paver |
hep-ph/9409397 | Couplings of heavy mesons with soft pions in QCD | QCD sum rules are used to calculate the couplings of heavy-light quark
pseudoscalar and vector mesons ($D, D^*$ and $B, B^*$) with soft pions, both
for finite and infinitely heavy quark mass. The couplings are also computed in
the framework of a QCD relativistic potential model; in this approach the
relativistic correc... | 1994-09-23 | 2009-10-28 | [
"hep-ph"
] | P.Colangelo |
hep-ph/9409399 | An Update of the CKM Matrix | We update the constraints on the parameters of the quark flavour mixing
matrix $V_{CKM}$ in the standard model using the latest experimental and
theoretical results as input. We present the 95$\%$ C.L. allowed region of the
unitarity triangle and the corresponding ranges for the ratio $\vert
V_{td}/V_{ts} \vert$ and fo... | 1994-09-23 | 2007-05-23 | [
"hep-ph"
] | Ahmed Ali and David London |
hep-ph/9409393 | One-Loop Corrections to Two-Quark Three-Gluon Amplitudes | We present the one-loop QCD amplitudes for two external massless quarks and
three external gluons ($\bar{q}qggg$). This completes the set of one-loop
amplitudes needed for the next-to-leading-order corrections to three-jet
production at hadron colliders. We also discuss how to use group theory and
supersymmetry to mini... | 1994-09-23 | 2010-11-15 | [
"hep-ph",
"hep-th"
] | Z. Bern, L. Dixon and D.A. Kosower |
hep-ph/9409402 | General Effective Actions | We investigate the structure of the most general actions with symmetry group
$G$, spontaneously broken down to a subgroup $H$. We show that the only
possible terms in the Lagrangian density that, although not $G$-invariant,
yield $G$-invariant terms in the action, are in one to one correspondence with
the generators of... | 1994-09-23 | 2009-10-28 | [
"hep-ph",
"hep-th"
] | Eric D'Hoker and Steven Weinberg |
hep-ph/9409396 | Energy Spectra and Energy Correlations in the Decay $H\to ZZ\to
\mu^+\mu^-\mu^+\mu^-$ | It is shown that in the sequential decay $H\to ZZ\to (f_1\bar{f_1})+
(f_2\bar{f_2})$, the energy distribution of the final state particles provides
a simple and powerful test of the $HZZ$ vertex. For a standard Higgs boson, the
energy spectrum of any final fermion, in the rest frame of $H$, is predicted to
be $d\Gamma ... | 1994-09-23 | 2010-11-01 | [
"hep-ph"
] | Torsten Arens and L.M. Sehgal |
hep-ph/9409398 | Calculation of a weak nonleptonic matrix element using ``Weinberg'' sum
rules | There is a ``toy'' weak matrix element which can be expressed as an integral
over the vector and axial vector spectral functions, $\rho_V (s) - \rho_A (s)$.
I review our recent evaluation of these spectral functions, the study of four
``Weinberg'' sum rules and the calculation of this matrix element. | 1994-09-23 | 2007-05-23 | [
"hep-ph"
] | John F. Donoghue |
hep-ph/9409379 | Probing New Physics in Rare Charm Processes | The possibility of using the charm system to search for new physics is
addressed. Phenomena such as $D^0-\bar D^0$ mixing and rare decays of charmed
mesons are first examined in the Standard Model to test our present
understanding and to serve as benchmarks for signals from new sources. The
effects of new physics from ... | 1994-09-22 | 2009-09-25 | [
"hep-ph"
] | J.L. Hewett |
hep-ph/9409384 | S-wave phase shift in Lambda-pi scattering | We calculate the s-wave strong interaction $\Lambda$$\pi$ phase shift at the
$\Xi$ mass taking into account contributions from the ${{\frac{1}{2}}}^{-}$ and
${{\frac{3}{2}}}^{-}$ $\Sigma$ resonances. We find the S-wave phase shift to be
small, of the order of 0.3 degrees and bounded by 0.5 degrees. | 1994-09-22 | 2015-06-25 | [
"hep-ph"
] | Alakabha Datta and Sandip Pakvasa |
hep-ph/9409388 | Analytical and numerical methods for massive two-loop self-energy
diagrams | Motivated by the precision results in the electroweak theory studies of
two-loopFeynman diagrams are performed. Specifically this paper gives a
contribution to the knowledge of massive two-loop self-energy diagrams in
arbitrary and especially four dimensions.This is done in three respects firstly
results in terms of ge... | 1994-09-22 | 2011-09-30 | [
"hep-ph"
] | S. Bauberger, F. A. Berends, M. Boehm, M. Buza |
hep-ph/9409394 | Penguin $B$ Decays $b\rightarrow s l^+l^-$ and $b\rightarrow s g$ | The penguin mediated processes $b\rightarrow s g$ and $b\rightarrow s l^+l^-$
are studied. In the Standard Model, for the leptonic modes improvement in
experimental limits will put strigient bounds on the top mass, where the
present limit from $b\rightarrow s \mu^+\mu^-$ is 390 GeV. For hadronic penguin
processes, alth... | 1994-09-22 | 2007-05-23 | [
"hep-ph"
] | N.G. Deshpande and Xiao-Gang He |
hep-ph/9409383 | The energy dependence of the Pomeron and the eikonalized Pomeron | The one-to-one connection between the eikonal phase and the ratio of the
elastic and total cross section is shown. Based on new experimental data of
Collaboration CDF we analyzed intercept and power of the logarithmic growth of
the Born and total Pomeron amplitude. | 1994-09-22 | 2016-09-01 | [
"hep-ph"
] | S.V.Goloskokov, S.P.Kuleshov, O.V.Selyugin |
hep-ph/9409391 | QCD radiative enhancement of the decay b -> c cbar s | A substantial enhancement is found of the $b \to c\,{\overline c}\, s$ decay
rate due to the QCD interaction within the $\overline c s$ pair, which
enhancement may amount to 30\%, or more. Some general features of calculation
of the QCD radiative corrections in two first orders are discussed. | 1994-09-22 | 2009-10-28 | [
"hep-ph"
] | M.B. Voloshin |
hep-ph/9409386 | Higgs-Sector Solitons | We establish the existence of static, classically-stable, winding solitons in
renormalizable three-dimensional gauge models, with topologically trivial
target space and vacuum manifold. They are prototypes for possible analogous
particle-like excitations in the higgs sector of the standard electroweak
theory. | 1994-09-22 | 2009-12-30 | [
"hep-ph",
"hep-th"
] | C. Bachas and T. N. Tomaras |
hep-ph/9409390 | Threshold Effects on the QCD Coupling $\alpha_{\overline{MS}}$ | The matching condition which determines the effect of a heavy quark threshold
on the running of the QCD coupling $\alpha_{\overline{MS}}$ is reviewed. The
matching scale is arbitrary to some extent. However, this affects the value of
$\alpha_{\overline{MS}}$ away from the threshold region only marginally. | 1994-09-22 | 2007-05-23 | [
"hep-ph"
] | W. Bernreuther |
hep-ph/9409387 | The $1/m_Q$ Expansion in QCD: Introduction and Overview | A mini-review of the heavy mass expansion in QCD is given. We focus on
exclusive semileptonic decays and some topics of recent interest in inclusive
decays of heavy hadrons. | 1994-09-22 | 2009-10-28 | [
"hep-ph"
] | Thomas Mannel |
hep-ph/9409392 | Lyapunov Exponent and Plasmon Damping Rate in Nonabelian Gauge Theories | We explain why the maximal positive Lyapunov exponent of classical SU($N$)
gauge theory coincides with (twice) the damping rate of a plasmon at rest in
the leading order of thermal gauge theory. [This is a substantially revised and
expanded version of the manuscript.] | 1994-09-22 | 2008-11-26 | [
"hep-ph"
] | T.S. Biro, C. Gong, and B. Mueller |
hep-ph/9409380 | Novel Approach to Confront Electroweak Data and Theory | A novel approach to study electroweak physics at one-loop level in generic
${\rm SU(2)_L \times U(1)_Y}$ theories is introduced. It separates the 1-loop
corrections into two pieces: process specific ones from vertex and box
contributions, and universal ones from contributions to the gauge boson
propagators. The latter ... | 1994-09-22 | 2008-11-26 | [
"hep-ph"
] | K.Hagiwara, D.Haidt, C.S.Kim and S.Matsumoto |
hep-ph/9409381 | "A Hint From the Inter-Family Mass Hierarchy: Two Vector-Like Families
in the TeV range" | Two vector-like families with masses of order 1 TeV, one of which is a
doublet of $SU(2)_L$ and the other a doublet of $SU(2)_R$, have been predicted
to exist in the context of a viable and economical SUSY composite model. One of
the many attractive features of the model is an explanation of the inter-family
mass-hiera... | 1994-09-22 | 2011-05-12 | [
"hep-ph"
] | K.S. Babu, Jogesh C. Pati and Hanns Stremnitzer |
hep-ph/9409382 | Comment on the Renormalization Group Improvement in Exclusive $b\ra c $
Transitions | Using rather general consideration I argue that the numerical impact of the
existing next-to-leading logarithmic summations of terms $\log{m_b/m_c}$ for
perturbative factors $\eta_A$, $\eta_V$ in the exclusive zero recoil
semileptonic transitions is irrelevant, and adopting corresponding corrections
beyond the exact on... | 1994-09-22 | 2010-11-01 | [
"hep-ph"
] | N.G. Uraltsev |
hep-ph/9409389 | Nonperturbative effects in heavy quarkonia | An effective hamiltonian for heavy quarkonia is derived from QCD by
separating gluonic fields in background and quantum fields and neglecting
anharmonic contributions. Mesonic states with nonperturbative gluonic
components are constructed. These states are invariant under gauge changes of
the background fields and form... | 1994-09-22 | 2009-09-25 | [
"hep-ph"
] | C. A. A. Nunes, F. S. Navarra, P. Ring and M. Schaden |
hep-ph/9409385 | Applied Chiral Perturbation Theory | I consider some selected topics in chiral perturbation theory (CHPT) as
probed at colliders such as DA$\Phi$NE. Emphasis is put on processes involving
pions in the isospin zero S-wave which require multi-loop calculations. These
include the scalar form factor of the pion, two--photon fusion into pion pairs
and $K_{\ell... | 1994-09-22 | 2009-09-25 | [
"hep-ph",
"nucl-th"
] | Ulf-G. Mei{\ss}ner |
hep-ph/9409377 | A Gauge Invariant Electromagnetic Two-Point Function For Heavy Light
Quark Systems | A gauge invariant electromagnetic two-point function, crucial to the
investigations of the violation of isospin symmetry, is derived for heavy-light
quark systems. Thus QED can be consistently introduced into the QCD Sum Rule
method, which was not previously possible. | 1994-09-21 | 2010-11-01 | [
"hep-ph"
] | L. Kisslinger and Zhenping Li |
hep-ph/9409366 | Neutron Electric Dipole Momento in Two-Higgs-Doublet Model | The effect of the "chromo-electric" dipole moment on the electric dipole
moment(EDM) of the neutron is studied in the two-Higgs-doublet model.
The Weinberg's operator $O_{3g}=GG\t G$ and the operator $O_{qg}=\bar
q\sigma\t Gq$ are both investigated in the cases of $\tan\b\gg 1$, $\tan\b\ll
1$ and $\tan\b\simeq 1$.
... | 1994-09-21 | 2010-11-01 | [
"hep-ph"
] | T. Hayashi, Y. Koide, M. Matsuda and M. Tanimoto |
hep-ph/9409367 | On the Solution to the Polonyi Problem with $O$(10~TeV) Gravitino Mass
in Supergravity | We study the solution to the Polonyi problem where the Polonyi field weighs
as $O(10{\rm TeV})$ and decays just before the primordial nucleosynthesis. It
is shown that in spite of a large entropy production by the Polonyi field
decay, one can naturally explain the present value of the baryon-to-entropy
ratio, $n_B/s \s... | 1994-09-21 | 2009-10-28 | [
"hep-ph"
] | T. Moroi, M. Yamaguchi and T. Yanagida |
hep-ph/9409375 | The one-loop renormalization of the MSSM Higgs sector and its
application to the neutral scalar Higgs masses | The structure of the Higgs sector in the minimal supersymmetric standard
model is reviewed at the one-loop level. An on-shell renormalization scheme of
the MSSM Higgs sector is presented in detail together with the complete list of
formulae for the neutral Higgs masses at the one-loop level. The results of a
complete o... | 1994-09-21 | 2011-07-19 | [
"hep-ph"
] | A. Dabelstein |
hep-ph/9409370 | Higher Twist, Polarised Structure Functions and the Bjorken System of
Equations | We discuss the present situation with regard to polarised nucleon structure
function measurements. In particular we examine the status of the Bjorken sum
rule in the light of the recent data on the spin structure functions of (i) the
deuteron obtained by the SMC group at CERN and (ii) the neutron by the E142
group at S... | 1994-09-21 | 2009-09-25 | [
"hep-ph"
] | Philip G. Ratcliffe |
hep-ph/9409372 | Model Independent Determination of the Solar Neutrino Spectrum with and
without MSW | Besides the opportunity for discovering new neutrino physics, solar neutrino
measurements provide a sensitive probe of the solar interior, and thus a
rigorous test of solar model predictions. We present model independent
determinations of the neutrino spectrum by using relevant flux components as
free parameters subjec... | 1994-09-21 | 2016-09-01 | [
"hep-ph",
"astro-ph"
] | Naoya Hata and Paul Langacker |
hep-ph/9409368 | The Bjorken System of Equations and Nucleon Spin Structure-Function Data | The status of the Bjorken sum rule is examined in the light of recent data on
the spin structure functions of the deuteron and proton obtained by the SMC
group, the neutron by the E142 group and the proton by the E143 group.
Combining the new data with that already obtained for the proton by the EMC
group and SLAC/YALE... | 1994-09-21 | 2007-05-23 | [
"hep-ph"
] | Philip G. Ratcliffe |
hep-ph/9409373 | The Rise in F_2^p at HERA | We show that the rise in $F_2^p$ at small $x$ and large $Q^2$ seen at HERA is
indeed the non-Regge double asymptotic scaling behaviour expected from the
perturbative emission of strongly ordered hard gluons. An alternative
explanation, in which there is no strong ordering, and a new hard Reggeon is
generated, is also t... | 1994-09-21 | 2009-09-25 | [
"hep-ph"
] | R. D. Ball and S. Forte |
hep-ph/9409369 | Neutrino Masses from Gauge Symmetries | A very simple extension of the standard model to include an Abelian family
symmetry is able to describe the hierarchy of quark and lepton masses and their
mixing angles together with the unification of gauge couplings. We consider the
implications of this model for neutrino masses and mixing angles and show that
they a... | 1994-09-21 | 2011-07-19 | [
"hep-ph"
] | H. Dreiner, G.K. Leontaris, S. Lola, Graham G. Ross and C. Scheich |
hep-ph/9409365 | Soft Jets and Top Mass Measurement at the Tevatron | Extra soft jets in top events in $p \bar p$ collisions may arise not only
from gluons radiated off initial state partons or final state $b$ quarks, but
may also be radiated from the $t$ quarks themselves. We discuss predictions for
distributions of soft gluons in $t \bar t$ production at the Tevatron and the
implicatio... | 1994-09-21 | 2009-09-25 | [
"hep-ph"
] | Lynne H. Orr and W.J. Stirling |
hep-ph/9409374 | Calculating F_2^p at small x and large Q^2 | We show that the double asymptotic scaling of the HERA structure function
data is consistent with pre-HERA data at larger $x$, soft pomeron behaviour at
small $x$ and a sensible starting scale $Q_0$. We can thus actually calculate
$F_2^p$ at small $x$ and large $Q^2$ by evolving up perturbatively at two
loops, without ... | 1994-09-21 | 2009-10-28 | [
"hep-ph"
] | R. D. Ball and S. Forte |
hep-ph/9409376 | The Anomalous Magnetic Moments of the Electron and the Muon - Improved
QED Predictions Using Pade Approximants | We use Pade Approximants to obtain improved predictions for the anomalous
magnetic moments of the electron and the muon. These are needed because of the
very precise experimental values presently obtained for the electron, and soon
to be obtained at BNL for the muon. The Pade prediction for the QED
contribution to the ... | 1994-09-21 | 2008-02-03 | [
"hep-ph"
] | John Ellis, Marek Karliner, Mark A. Samuel and Eric Steinfelds |
hep-ph/9409371 | Mass singularities in light quark correlators: the strange quark case | The correlators of light-quark currents contain mass-singularities of the
form log(m^2/Q^2). It has been known for quite some time that these mass-
logarithms can be absorbed into the vacuum expectation values of other
operators of appropriate dimension, provided that schemes without normal-
ordering are used. We discu... | 1994-09-21 | 2009-10-28 | [
"hep-ph"
] | K.G.Chetyrkin, C.A.Dominguez, D.Pirjol and K.Schilcher |
hep-ph/9409378 | Heavy Meson Form Factors, Couplings and Exclusive Decays in QCD | We discuss the form factors of the heavy-to-light transitions $B \ra \pi$ and
$D\ra \pi$, the $B^*B \pi$ and $D^*D \pi$ coupling constants, and the
nonfactorizable amplitude of the decay $ B \ra J/\psi K$ in the framework of
QCD sum rules. | 1994-09-21 | 2009-10-28 | [
"hep-ph"
] | A. Khodjamirian, R. R\"uckl |
hep-ph/9409363 | The Electromagnetic Catalysis of the Neutrino Radiative Decay | The radiative decay of the massive neutrino $\nu_i \rightarrow \nu_j \gamma (
m_i > m_j )$ in the external electromagnetic field is analyzed in detail in the
framework of the standard model with lepton mixing. It is shown, that a sort of
a catalysis of the neutrino radiative decay takes place. The effect of
catalysis i... | 1994-09-20 | 2007-05-23 | [
"hep-ph"
] | A.A.Gvozdev, N.V.Mikheev and L.A.Vassilevskaya |
hep-ph/9409358 | $|V_{cb}|$ from OPE Sum Rules for Heavy Flavor Transitions | Recent progress in determination of $|V_{cb}|$ within the heavy quark
expansion is reported. Both exclusive and inclusive approaches are discussed. | 1994-09-20 | 2007-05-23 | [
"hep-ph"
] | M. Shifman |
hep-ph/9409359 | Theory of Weak Inclusive Decays and Lifetimes of Heavy Hadrons | The theory of preasymptotic effects in inclusive decays of heavy flavors is
briefly reviewed. | 1994-09-20 | 2007-05-23 | [
"hep-ph"
] | M. Shifman |
hep-ph/9409364 | Probing Factorization in Color-Suppressed $B \rightarrow \psi(2S) +
K(K^*)$ Decay | In order to probe the factorization hypothesis in color-suppressed $B
\rightarrow \psi (2S) + K (K^*)$ decays we have studied three ratios: $ R
\equiv B (B \rightarrow \psi K) / B (B \rightarrow \psi(2S) K)$, $ R' \equiv B
(B \rightarrow \psi K^*) / B (B \rightarrow \psi(2S) K^*)$ and $ P_L^\prime
\equiv \Gamma_L (B \r... | 1994-09-20 | 2011-07-19 | [
"hep-ph"
] | A. N. Kamal and A. B. Santra |
hep-ph/9409357 | Detection of Minimal Supersymmetric Model Higgs Bosons in $\gam\gam$
Collisions: Influence of SUSY Decay Modes | We demonstrate that supersymmetric decay modes of the neutral Higgs bosons of
the MSSM could well make their detection extremely difficult when produced
singly in $\gam\gam$ collisions at a back-scattered laser beam facility. | 1994-09-20 | 2009-10-28 | [
"hep-ph"
] | J.F. Gunion, J.G. Kelly, and J. Ohnemus |
hep-ph/9409360 | Sphalerons in the Standard Model with a real Higgs singlet | Sphaleron energies within the standard model with a real Higgs singlet added
on are calculated. The coupled non-linear equations of motion are numerically
solved and the sphaleron energy evaluated for a set of parameters in the Higgs
potential. I find a small difference in the sphaleron energy compared to the
standard ... | 1994-09-20 | 2009-09-25 | [
"hep-ph"
] | J. Choi |
hep-ph/9409361 | The Aligned $SU(5) \times U(1)^2$ Model | In Calabi-Yau string compactification, it is pointed out that there exists a
new type of $SU(5) \times U(1)^2$ model (the aligned $SU(5) \times U(1)^2$
model) in which the $SU(5)$ differs from the standard $SU(5)$ and also from the
flipped $SU(5)$. With the aid of the discrete symmetry suggested from Gepner
model, we c... | 1994-09-20 | 2009-10-28 | [
"hep-ph",
"hep-th"
] | Naoyuki Haba, Chuichiro Hattori, Masahisa Matsuda, Takeo Matsuoka and
Daizo Mochinaga |
hep-ph/9409362 | SU(3) Flux Tubes in a Model of the stochastic Vacuum | We calculate the squared gluon field strengths of a heavy q-$\rm
\bar{q}$-pair in the model of the stochastic vacuum. We observe that with
increasing separation a chromoelectric flux tube is built. The properties of
the emerging flux tube are investigated. | 1994-09-20 | 2008-11-26 | [
"hep-ph"
] | M. Rueter H.G. Dosch |
hep-ph/9409351 | Spin-dependent Parton Distributions | We perform a global leading-order QCD fit to recent polarized structure
function data in order to extract a consistent set of spin-dependent parton
distributions. Assuming that there is no significant intrinsic polarization of
the quark sea, the data are consistent with a modest amount of the proton's
spin carried by t... | 1994-09-19 | 2007-05-23 | [
"hep-ph"
] | T.Gehrmann and W.J.Stirling |
hep-ph/9409352 | Perturbative QCD Fragmentation Functions as a Phenomenological Model for
Charm/Bottom Fragmentation | The perturbative QCD fragmentation functions can be applied
phenomenologically as a model for charm and bottom quark fragmentation into
heavy-light mesons. The predictions by this model on the observables $P_V$ and
$\langle z \rangle$ for $D-D^*$ and $B-B^*$ systems are compared with
experimental data. | 1994-09-19 | 2009-09-25 | [
"hep-ph"
] | Kingman Cheung |
hep-ph/9409347 | Supersymmetric Grand Unified Theories And Yukawa Unification | Talk given at Frontiers in Particle Physics Conference, Cargese. In this
paper, I provide some motivation for supersymmetric grand unified theories,
briefly explain an extension of the standard model based on them and present a
calculation performed using certain properties of some SUSY GUTs to constrain
the available ... | 1994-09-19 | 2007-05-23 | [
"hep-ph"
] | B. C. Allanach |
hep-ph/9409349 | Model Independent Features of the Two-Particle Correlation Function | The Hanbury-Brown Twiss correlation function for two identical particles is
studied for systems with cylindrical symmetry. Its shape for small values of
the relative momentum is derived in a model independent way. In addition to the
usual quadratic ``side'', ``out'' and ``longitudinal'' terms in the exponent of
the cor... | 1994-09-19 | 2022-02-23 | [
"hep-ph"
] | Scott Chapman, Pierre Scotto, and Ulrich Heinz |
hep-ph/9409355 | Distinguishing $B$ and $\overline B$ Hadrons | Distinguishing the flavor of $B$ and $\overline B$ hadrons is critical in
studies of CP-violation, $B^0 -\overline{B^0}$ mixing, and the underlying
$b$-decay mechanisms. Methods of $b$ ``flavor tagging" are broadly divided into
``opposite $b$" tagging and self-tagging of the signal $b$ hadron. The former,
while underst... | 1994-09-19 | 2007-05-23 | [
"hep-ph"
] | Isard Dunietz |
hep-ph/9409350 | Cosmological Constraints on Perturbative Supersymmetry Breaking | We discuss the cosmology of string models with perturbative supersymmetry
breaking at a scale of ${\cal O}$(TeV). Such models exhibit Kaluza-Klein like
spectra and contain unstable massive gravitinos/gravitons. We find that
considerations of primordial nucleosynthesis constrain the maximum temperature
following inflati... | 1994-09-19 | 2011-02-16 | [
"hep-ph",
"astro-ph"
] | S.A. Abel and S. Sarkar |
hep-ph/9409354 | Further ways to distinguish single-lepton top quark signals from
background at the Tevatron | Further kinematical variables are suggested, in which to compare the putative
leptonic $W$ plus 4-jet top quark signal with the QCD background. We show that
the lepton rapidity asymmetry, the $p_T$-ranking of the tagged $b$-jet, the
double-tag probability, the reconstructed $t+\bar t$ invariant mass, and the
lepton ene... | 1994-09-19 | 2009-09-25 | [
"hep-ph"
] | V.Barger, E.Mirkes, J.Ohnemus and R.J.N.Phillips |
hep-ph/9409353 | S-Wave and P-Wave $B_c$ Meson Production at Hadron Colliders by Heavy
Quark Fragmentation | We compute model-independently the production rates and transverse momentum
spectra for the $B_c$ mesons in various spin-orbital states ($n\,^1S_0$,
$n\,^3S_1$, $n\,^1P_1$, and $n\,^3P_J\,(J=0,1,2)$ ) at hadron colliders via the
direct fragmentation of the bottom antiquark and via the
Altarelli-Parisi-induced gluon fra... | 1994-09-19 | 2009-09-25 | [
"hep-ph"
] | kingman Cheung and Tzu Chiang Yuan |
hep-ph/9409356 | Light mesons production at the Tevatron to next-to-leading order | Inclusive production of light mesons ($\pi^0$, $\eta$, $\pi^{\pm}$, $K^{\pm}$
) at the Tevatron is considered in QCD to next-to-leading order in the
formalism of fragmentation functions. We present various distributions of
phenomenological interest, along with a new set of $K$ mesons fragmentation
functions. | 1994-09-19 | 2009-10-28 | [
"hep-ph"
] | Mario Greco and Simona Rolli |
hep-ph/9409348 | Semileptonic $B\to D^{(*)}l\nu$ decays, the slope of Isgur-Wise function
and $|V_{bc}|$ value in potential quark model | The modification of the naive potential model of the heavy meson is
considered on the basis of the single-time prescription for the quark-meson
form factor and the covariant choice of the quatk relative momentum. The
application of the model to the description of the semileptonic decays of the
beauty meson allows one t... | 1994-09-19 | 2010-11-01 | [
"hep-ph"
] | V.V.Kiselev |
hep-ph/9409346 | Expanding Protons seen by HERA | We show that the rising total photoproduction cross section recently observed
at HERA is entirely consistant with the impact-picture in the theory of
expanding protons which was proposed more than twenty years ago. More accurate
data, which is expected to be forthcoming soon, will give this prediction a
stringent test. | 1994-09-19 | 2009-10-28 | [
"hep-ph"
] | C. Bourrely, J. Soffer, Tai Tsun Wu |
hep-ph/9409345 | How to Measure $m_t$: A Brief Overview | This talk is an overview of prospects for measuring the top mass $m_t$ at
present and future colliders. Methods for extracting $m_t$ appropriate to
experiments at the Tevatron, Large Hadron Collider, and Next Linear Collider
are discussed, with examples given for each. Sources of systematic
uncertainties specific to ea... | 1994-09-17 | 2009-09-25 | [
"hep-ph"
] | Lynne H. Orr |
hep-ph/9409344 | Non-perturbative methods | The current theoretical understanding of processes involving many weakly
interacting bosons in the Standard Model and in model theories is discussed. In
particular, such processes are associated with the baryon and lepton number
violation in the Standard Model. The most interesting domain where the
multiplicity of boso... | 1994-09-17 | 2007-05-23 | [
"hep-ph"
] | M.B. Voloshin |
hep-ph/9409343 | Pion Multiplicity Distribution in Proton-Antiproton Annihilation at Rest | The pion multiplicity distribution is widely believed to reflect the
statistical aspects of $\bar{p}p$ annihilation at rest. We try to reproduce it
in a grand canonical picture with explicit conservation of electric charge,
isospin, total angular momentum, and the parity quantum numbers $P$, $C$, and
$G$ via the projec... | 1994-09-16 | 2009-10-09 | [
"hep-ph"
] | Wolfgang Bl"umel and Ulrich Heinz |
hep-ph/9409341 | Semileptonic B Meson Decays and Interfering Amplitudes | Consequences of the interference between external and internal spectator
amplitudes for the lifetimes and semileptonic decay fractions of $B^0$ and
$B^+$ mesons are discussed. Extrapolating from the constructive interference
observed in 11 exclusive hadronic $B$ decays we find an inclusive semileptonic
decay fraction o... | 1994-09-16 | 2007-05-23 | [
"hep-ph"
] | K. Honscheid (Ohio State University), K. Schubert (TU Dresden), R.
Waldi (TU Dresden) |
hep-ph/9409338 | Lattice results for Heavy-Light matrix elements | We review recent lattice computations relevant for $D$ and $B$ decays. Decay
constants $f_{D,D_s}$, $f_{B,B_s}$, $D\rightarrow K (K^*)$, $B\rightarrow \pi ,
\rho$ semi-leptonic form factors together with the slope of the Isgur-Wise
function calculations are presented. Some recent results of $B\rightarrow K^*
\gamma$ fo... | 1994-09-16 | 2019-08-15 | [
"hep-ph",
"hep-lat"
] | As. Abada (for the APE, ELC and UKQCD Collaborations) |
hep-ph/9409329 | Naturally Light Higgs Doublets in the Supersymmetric Grand Unified
Theories with Dynamical Symmetry Breaking | We construct a supersymmetric grand unified model in which a dynamical
symmetry breaking of SU(5)$_{GUT}$ generates large masses for color-triplet
Higgs multiplets while keeping SU(2)$_L$-doublet Higgs multiplets naturally
light. The vanishing masses for the Higgs doublets are guaranteed by the
Peccei-Quinn symmetry. W... | 1994-09-16 | 2009-10-28 | [
"hep-ph"
] | T.Yanagida |
hep-ph/9409342 | Supersymmetric Unification: a mini-review of recent developments | Some recent results in supersymmetric grand unified theories are reviewed. | 1994-09-16 | 2007-05-23 | [
"hep-ph"
] | V.Barger, M.S.Berger and P.Ohmann |
hep-ph/9409337 | What is the lightest excited state of the strongly selfcoupled Higgs
field? | We argue for the existence of an upper bound $m_*$ on the Higgs mass at which
the lowest excited state of the Higgs field ceases to be the conventional plane
wave. An explicit construction of an alternative nonperturbative state is
discussed. This excitation is spatially localized. The field fluctuations
inside the loc... | 1994-09-16 | 2009-10-28 | [
"hep-ph"
] | V. G. Kiselev and H. So |
hep-ph/9409340 | QCD corrections to large-$m_t$ electroweak effects in $\Delta r$. An
effective field theory point of view | By using effective field theory techniques for the standard model, we discuss
the issue of what $\mu$ scale is the appropriate one in the QCD corrections to
the large-$\mt$ electroweak contributions to $\Delta r$. This needs the
construction of an effective field theory below the top quark. We argue that,
while matchin... | 1994-09-16 | 2009-10-28 | [
"hep-ph"
] | S. Peris |
hep-ph/9409339 | The Free Energy of Hot QED at Three and Half Loops | The computation of order $e^4$ and $e^5$ contributions to the pressure of
massless quantum electrodynamics at a temperature $T$ is overviewed. | 1994-09-16 | 2007-05-23 | [
"hep-ph"
] | Rajesh Parwani (Saclay) and Claudio Coriano` (Argonne) |
hep-ph/9409336 | New Electroweak Instanton and Possible Breakdown of Unitarity | Potential implications of a new constrained instanton solution in the
electroweak standard model are discussed. Notably, there may be a
non-perturbative unitarity violating contribution to the total cross-section at
high collision energies. | 1994-09-16 | 2007-05-23 | [
"hep-ph"
] | F. R. Klinkhamer |
hep-ph/9409333 | Exact $m_{quark}\neq 0$ Condensates in $QCD_{1+1}(N_C\rightarrow
\infty)$ | In the limit of an infinite number of colors, we derive an analytic
expression for the quark condensate in $QCD_{1+1}$ as a function of the quark
mass and the gauge coupling constant. For zero quark mass, a nonvanishing quark
condensate is obtained. Nevertheless, we prove that there is no phase
transition as a function... | 1994-09-15 | 2007-05-23 | [
"hep-ph"
] | Matthias Burkardt |
hep-ph/9409321 | Could Vector Leptoquarks be Rather Light? | A possible Standard Model extension of the Pati-Salam type with a lepton
number as the fourth color is reexamined. A new type of mixing in the
interaction of the $SU(4)_V$--leptoquark with quarks and leptons is shown to be
required. An additional arbitrariness of the mixing parameters could allow to
decrease noticeably... | 1994-09-15 | 2007-05-23 | [
"hep-ph"
] | A.V.Kuznetsov and N.V.Mikheev |
hep-ph/9409316 | Perturbative QCD Fragmentation Functions as a Model for Heavy-Quark
Fragmentation | The perturbative QCD fragmentation functions for a heavy quark to fragment
into heavy-light mesons are studied in the heavy-quark limit. The fragmentation
functions for S-wave pseudoscalar and vector mesons are calculated to
next-to-leading order in the heavy-quark mass expansion using the methods of
heavy-quark effect... | 1994-09-15 | 2010-11-01 | [
"hep-ph"
] | E. Braaten, K. Cheung, S. Fleming, T.C. Yuan |
hep-ph/9409323 | NN,N\Delta Couplings and the Quark Model | We examine mass-corrected SU(6) symmetry predictions in the quark model
relating vector, axial-vector and strong NN and N\Delta couplings, and
demonstrate that the experimental N\Delta value is significantly higher than
predicted in each case. Nevertheless the Goldberger-Treiman relation is
satisfied in both sectors. P... | 1994-09-15 | 2009-10-28 | [
"hep-ph",
"nucl-th"
] | Thomas R. Hemmert, Barry R. Holstein and Nimai C. Mukhopadhyay |
hep-ph/9409331 | The Third Family is Different | It now appears phenomenologically that the third family of fundamental
fermions may be essentially different fron the first two. Particularly the high
value (174GeV?) of the top quark mass suggests a special role. In the standard
model all three families are treated similarly [becoming exactly the same at
asymptoticall... | 1994-09-15 | 2007-05-23 | [
"hep-ph"
] | Paul H. Frampton |
hep-ph/9409330 | Simple Non-Abelian Finite Flavor Groups and Fermion Masses | The use of nonabelian discrete groups G as family symmetries is discussed in
detail. Out of all such groups up to order g = 31, the most appealing
candidates are two subgroups of SU(2): the dicyclic [double dihedral] group G =
$Q_6 ={ }^{(d)}D_3$ ( g = 12 ) and the double tetrahedral group $^{(d)}T =
Q_4\tilde{\times}Z... | 1994-09-15 | 2011-01-13 | [
"hep-ph"
] | Paul H. Frampton and Thomas W. Kephart |
hep-ph/9409317 | Determination of V_ub at the Z-boson resonance | We show that the observation of energetic charged leptons from semileptonic
$b$ becays at the LEP and SLC $Z$--boson factories offers a unique opportunity
to measure the quark mixing matrix element $V_{ub}$. We present various
distributions of the $b$ decay products to show that the $b \to u$ decays can
be cleanly sepa... | 1994-09-15 | 2010-11-01 | [
"hep-ph"
] | C.S. Kim (Yonsei Univ.) and A.D. Martin (Durham Univ.) |
hep-ph/9409324 | Minimal Family Unification | Absract It is proposed that there exist, within a new $SU(2)^{'}$, a gauged
discrete group $Q_6$ (the order 12 double dihedral group) acting as a family
symmetry. This nonabelian finite group can explain hierarchical features of
families, using an assignment for quarks and leptons dictated by the
requirements of anomal... | 1994-09-15 | 2009-12-30 | [
"hep-ph"
] | Paul H. Frampton and Thomas W. Kephart |
hep-ph/9409327 | Bose-Einstein Correlations for Longitudinally Expanding Finite Systems | Bose-Einstein correlations and momentum distributions are calculated for
longitudinally expanding systems, like jets or high energy heavy ion collisions
with light projectiles. The expansion generates a thermal length-scale in the
longitudinal direction, and the geometrical length-scale is also finite. The
Bose-Einstei... | 1994-09-15 | 2009-10-28 | [
"hep-ph",
"nucl-th"
] | T. Csorgo |
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