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/9402252 | Electroweak Baryogenesis: A Status Report | There are many reasons to believe that there might be new sources of
CP-violation beyond the phases of the KM matrix. One of these is the
possibility of electroweak baryogenesis. We describe some recent developments
in this subject and make some comments on the possibility that the minimal
standard model might itself b... | 1994-02-08 | 2015-06-25 | [
"hep-ph"
] | Michael Dine |
hep-ph/9402238 | Mass Bounds in the Standard Model | Nonperturbative triviality and vacuum stability mass bounds are obtained for
the Higgs scalar and top quark degrees of freedom in the standard electroweak
model using Wilson renormalization group techniques. Particular attention is
given to the effect of the generalized top Yukawa coupling on the scalar mass
upper boun... | 1994-02-07 | 2019-08-17 | [
"hep-ph"
] | T.E. Clark, B. Haeri, S.T. Love, M.A. Walker, W.T.A ter Veldhuis |
hep-ph/9402239 | Explicit Electroweak symmetry breaking? | We hypothesise that all electroweak symmetry breaking terms such as fermion
masses and the W and Z gauge boson masses arise radiatively from just one
explicit symmetry breaking term in the Lagrangian. Our hypothesis is motivated
by the lack of experimental support and the lack of predictivity of the
standard symmetry b... | 1994-02-07 | 2009-09-25 | [
"hep-ph"
] | R. Foot and Tran Anh Tuan |
hep-ph/9402244 | A parity invariant $SU(3)_c \otimes SU(3)_L \otimes U(1)$ model | We examine a $SU(3)_c \otimes SU(3)_{L}\otimes U(1)$ gauge model which has a
parity symmetric Lagrangian. The parity symmetry has the novel feature that it
interchanges the gluons with the $SU(3)_L$ gauge bosons (which contain the
ordinary $SU(2)_L$ weak gauge bosons). We show that the model reduces to the
standard mod... | 1994-02-07 | 2015-06-25 | [
"hep-ph"
] | R. Foot |
hep-ph/9402240 | Electric charge quantization without anomalies? | In gauge theories like the standard model, the electric charges of the
fermions can be heavily constrained from the classical structure of the theory
and from the cancellation of anomalies. We argue that the anomaly conditions
are not quite as well motivated as the classical constraints, since it is
possible that new f... | 1994-02-07 | 2009-10-28 | [
"hep-ph"
] | R. Foot |
hep-ph/9402241 | Neutrino oscillations and the exact parity model | We re-examine neutrino oscillations in exact parity models. Previously it was
shown in a specific model that large neutrino mixing angles result. We show
here that this is a general result of neutrino mixing in exact parity models
provided that the neutrino mass matrix is real. In this case, the effects of
neutrino mix... | 1994-02-07 | 2015-06-25 | [
"hep-ph"
] | R. Foot |
hep-ph/9402236 | Heavy--light mesons in a bilocal effective theory | Heavy--light mesons are described in an effective quark theory with a
two--body vector--type interaction. The bilocal interaction is taken to be
instantaneous in the rest frame of the bound state, but formulated covariantly
through the use of a boost vector. The chiral symmetry of the light flavor is
broken spontaneous... | 1994-02-07 | 2009-10-28 | [
"hep-ph"
] | Yu. L. Kalinovsky and C. Weiss |
hep-ph/9402242 | A note on Koide's lepton mass relation | Koide has pointed out that the mass relation $m_e + m_{\mu} + m_{\tau} = {2
\over 3}(\sqrt{m_e} + \sqrt{m_{\mu}} + \sqrt{m_{\tau}})^2 $ is consistent with
the most recent measurements of the tau lepton mass. We point out that this
relation has a geometric interpretation. | 1994-02-07 | 2007-05-23 | [
"hep-ph"
] | R. Foot |
hep-ph/9402243 | $\mbox{SU}(3)_L \otimes \mbox{U}(1)_N$ and $\mbox{SU}(4)_L \otimes
\mbox{U}(1)_N$ gauge models with right-handed neutrinos | Pisano and Pleitez have introduced an interesting $\mbox{SU}(3)_C \otimes
\mbox{SU}(3)_L \otimes \mbox{U}(1)_N$ gauge model which has the property that
gauge anomaly cancellation requires the number of generations to be a multiple
of 3. We consider generalizing that model to incorporate right-handed
neutrinos. We find ... | 1994-02-07 | 2008-11-26 | [
"hep-ph"
] | Robert Foot, Hoang Ngoc Long, and Tuan A.Tran |
hep-ph/9402245 | Chiral Current at High Temperatures | The BP-FTW effective action is a good laboratory to study the nature of
chiral symmetry at high $T$. It is invariant under a new Noether charge,
$\Qbeta$. By explicit quantization, performed to order $\Tprime$ we show that
the thermal vacuum is annihilated by $\Qbeta$, so that the new chiral symmetry
is not broken spon... | 1994-02-07 | 2016-09-01 | [
"hep-ph"
] | Ngee Pong Chang |
hep-ph/9402237 | Electromagnetic Contributions to the Schiff Moment | The Schiff moment, $\smij$, is a parity and time reversal violating
fermion-fermion coupling. The nucleus-electron Schiff moment generically gives
the most important contribution to the electric dipole moments of atoms and
molecules with zero net intrinsic electronic spin and nuclear spin ${1 \over
2}$. Here, the elect... | 1994-02-07 | 2009-10-28 | [
"hep-ph"
] | Scott Thomas |
hep-ph/9402235 | Dynamical CP Violation in Composite Higgs Models - a Review - | In composite Higgs models it was pointed out that there is a possibility to
violate CP symmetry dynamically. We demonstrated a simple model of dynamical CP
violation in composite Higgs models. We calculated the neutron electric dipole
moment in our model and the constraint for our model is discussed. (Talk
presented at... | 1994-02-05 | 2015-06-25 | [
"hep-ph"
] | T.Inagaki |
hep-ph/9402228 | Hadron Electromagnetic Structure: Shedding Light on Models and their
Mechanisms | Strange quark contributions to the proton magnetic moment are estimated from
a consideration of baryon magnetic moment sum rules. The environment
sensitivity of quark contributions to baryon moments is emphasized. Pion cloud
contributions to proton charge radii are examined in the framework of Chiral
Perturbation Theor... | 1994-02-04 | 2009-10-28 | [
"hep-ph",
"hep-lat"
] | Derek B. Leinweber |
hep-ph/9402230 | $\tau$ Decay and the QCD infrared fixed point | We apply the optimization procedure based on the Principle of Minimal
Sensitivity to the third-order calculation of $R_{\tau}$. Since the effective
couplant remains finite, freezing to a value $\alpha_s/\pi = 0.26$ at low
energies, we can actually evaluate the defining integral of $R_{\tau}$ and
compare the optimized p... | 1994-02-04 | 2009-09-25 | [
"hep-ph"
] | A.C. Mattingly |
hep-ph/9402234 | Lepton-antilepton Annihilation in the Massless Schwinger Model | We evaluate the next-to-leading order radiative corrections to a process in
the massless Schwinger model that is the analogue of the $e^+e^-$ inclusive
annihilation into hadrons process in QCD. We then carry out an asymptotic
expansion of the calculable exact result and find that it agrees with the
perturbative answer.... | 1994-02-04 | 2007-05-23 | [
"hep-ph"
] | Jin Dai and James Hughes |
hep-ph/9402229 | Naturally Degenerate Neutrinos | The solar neutrino problem, atmospheric neutrino problem, and the existence
of hot dark matter can all be economically accounted for using only the three
known neutrinos if these neutrinos all have nearly degenerate masses of a few
eV. We show how to generate this pattern of neutrino masses in a natural way
within a `s... | 1994-02-04 | 2009-10-28 | [
"hep-ph"
] | P. Bamert and C.P. Burgess |
hep-ph/9402225 | Heavy Quark Distribution Function in QCD and the AC$^2$M$^2$ Model | We show that the phenomenological \ACM ansatz is consistent with QCD through
order $1/m_b$ in the description of $B\ra l\bar \nu_l+X_u$ and $B\ra \gamma
+X_s$ transitions, including their energy spectra and differential
distributions. This suggests a concrete realization for the QCD distribution
function, which we call... | 1994-02-04 | 2009-10-28 | [
"hep-ph"
] | I. Bigi, M. Shifman, N. Uraltsev, A. Vainshtein |
hep-ph/9402232 | New Trends in Particle Theory | I discuss some new trends in particle theory beyond the standard model. Some
topics briefly covered include elecroweak baryogenesis, gauge versus non-gauge
discrete symmetries, the strong CP problem, dynamical symmetry breaking
scenarios, supersymmetric grand unification, new aspects in low energy
supersymmetry and sup... | 1994-02-04 | 2007-05-23 | [
"hep-ph"
] | Luis E. Ibanez |
hep-ph/9402226 | The top-quark mass in SU(5)xU(1) supergravity | We show that the currently experimentally preferred values of the top-quark
mass (\ie, $130\lsim m_t\lsim180\GeV$) are naturally understood in the context
of string models, where the top-quark Yukawa coupling at the string scale is
generically given by $\lambda_t={\cal O}(g)$, with $g$ the unified gauge
coupling. A det... | 1994-02-04 | 2016-09-01 | [
"hep-ph"
] | J. Lopez, D. Nanopoulos, and A. Zichichi |
hep-ph/9402231 | Accomodating Solar and Atmospheric Neutrino Deficits, Hot Dark Matter,
and a Double Beta Decay Signal | Neutrino mass explanations of the solar and atmospheric neutrino deficits and
a hot dark matter component require one of three patterns of those masses, as
already pointed out by us. Recently there have been indications of a
non-vanishing amplitude for neutrinoless double beta decay. If this additional
hint of neutrino... | 1994-02-04 | 2009-10-28 | [
"hep-ph"
] | David O. Caldwell and Rabindra N. Mohapatra |
hep-ph/9402233 | Corrections to Bino Annihilation II: One-Loop Contribution to
$\widetilde B \widetilde B \to Z^*$ | We calculate the one-loop contribution to the bino annihilation rate due to
the process $\widetilde B \widetilde B \to Z^*$, which vanishes at tree level. | 1994-02-04 | 2009-09-25 | [
"hep-ph"
] | Toby Falk, Richard Madden, Keith A. Olive, and Mark Srednicki |
hep-ph/9402227 | CP Violation and Strong Phases from Penguins in $\bf B^{\pm}\rightarrow
VV$ Decays | We calculate direct CP-violating observables in charged $B\to VV$ decays
arising from the interference of amplitudes with different strong and CKM
phases. The perturbative strong phases develop at order $\alpha_s$ from
absorptive parts of one-loop matrix elements of the next-to-leading logarithm
corrected effective Ham... | 1994-02-04 | 2010-11-01 | [
"hep-ph"
] | G. Kramer, W.F. Palmer, H. Simma |
hep-ph/9402221 | Evolution Equations for the Quark-Meson Transition | Evolution equations describe the effect of consecutively integrating out all
quantum fluctuations with momenta larger than some infrared cutoff scale k. We
develop a formalism for the introduction of collective degrees of freedom at
some intermediate scale and derive the corresponding evolution equations. This
allows t... | 1994-02-03 | 2009-10-28 | [
"hep-ph",
"hep-th"
] | U. Ellwanger and C. Wetterich |
hep-ph/9402223 | New results for two-loop off-shell three-point diagrams | A number of exact results for two-loop three-point diagrams with massless
internal particles and arbitrary (off-shell) external momenta are presented.
Divergent contributions are calculated in the framework of dimensional
regularization. | 1994-02-03 | 2009-10-28 | [
"hep-ph"
] | N.I. Ussyukina and A.I. Davydychev |
hep-ph/9402214 | Wavefunction-Independent Relations between the Nucleon Axial-Coupling
g_A and the Nucleon Magnetic Moments | We calculate the proton's magnetic moment $\mu_p$ and its axial-vector
coupling $g_A$ as a function of its Dirac radius $R_1$ using a relativisitic
three-quark model formulated on the light-cone. The relationship between
$\mu_p$ and $g_A$ is found to be independent of the assumed form of the
light-cone wavefunction. At... | 1994-02-03 | 2009-09-25 | [
"hep-ph"
] | Stanley J. Brodsky and Felix Schlumpf |
hep-ph/9402219 | Slepton pair production in e+e- collision in supersymmetric left-right
model | The pair production of sleptons in electron-positron collisions is
investigated in a supersymmetric left-right model. The cross section is found
considerably larger than in the minimal supersymmetric version of the Standard
Model (MSSM) because of more contributing graphs. A novel process is a doubly
charged higgsino e... | 1994-02-03 | 2009-10-28 | [
"hep-ph"
] | K. Huitu, J. Maalampi, M. Raidal |
hep-ph/9402220 | First estimates of the $(\alpha + \beta)^{\pi}$ from two--photon
experiments | We carry out the semi--model analysis of existing data on the angular
distributions of the $\gamma\gamma\rightarrow\pi^+ \pi^- ,\ \pi^0 \pi^0$
reactions with purpose to obtain S-wave cross section and D-wave's parameters.
In the first time we obtain from experiment the sum of electrical and magnetic
pion polarizabiliti... | 1994-02-03 | 2007-05-23 | [
"hep-ph"
] | A.E.Kaloshin, V.M.Persikov and V.V.Serebryakov |
hep-ph/9402222 | QED at Finite Temperature in the Coulomb Gauge | We argue that calculations in QED at finite temperature are more conveniently
carried out in the Coulomb gauge, in which only the physical photon degrees of
freedom play a rol and are thermalized. We derive the photon propagator in this
gauge for real-time finite temperature calculations and show that the
four-fermion ... | 1994-02-03 | 2007-05-23 | [
"hep-ph"
] | J. C. D'Olivo, J. F. Nieves, M. Torres and E. Tututi |
hep-ph/9402218 | Stability of an electroweak string with a fermion condensate | A solution of the standard electroweak theory with a single lepton family is
constructed, consisting of a cosmic string and a fermion condensate within its
core. The stability of this system to small perturbations is examined, and it
is found that stability is not enhanced relative to the bare electroweak
string. The p... | 1994-02-03 | 2009-10-28 | [
"hep-ph"
] | Michael A. Earnshaw, Warren B. Perkins |
hep-ph/9402216 | $K^0 $ Decays into Three Photons | The decays $K_{L,S} \to 3 \gamma $ are not forbidden by any selection rules
or symmetry principles. However, gauge invariance and Bose statistics dictate
that every photon pair in these transitions has at least two units of angular
momentum. This gives rise to an extraordinary suppression. Using a simple
model, we obta... | 1994-02-03 | 2009-10-28 | [
"hep-ph"
] | P. Heiliger, B. McKellar and L.M. Sehgal |
hep-ph/9402224 | Limits on Neutrino Mixing with new Heavy Particles | We study the effects induced by new neutral fermions below their mass
threshold, due to their possible mixing with the standard neutrinos. We use as
experimental constraints the recent results on lepton universality, together
with the measurement of the $\mu$ decay rate and the updated LEP data. In
particular, the incl... | 1994-02-03 | 2010-11-01 | [
"hep-ph"
] | E. Nardi, E. Roulet and D. Tommasini |
hep-ph/9402217 | R Parity in Standard--like Superstring Models | We investigate the R symmetries of standard--like superstring models. At the
level of the cubic superpotential there are three global $U(1)$ R symmetries.
These are broken explicitly by $N>3$ terms in the superpotential and
spontaneously by scalar VEVs necessary to preserve supersymmetry at $M_P$. A
$Z_2$ discrete symm... | 1994-02-03 | 2011-07-19 | [
"hep-ph"
] | Edi Halyo |
hep-ph/9402215 | High Energy Gamma--Radiation from the Galactic Center due to Neutralino
Annihilation | We study the NGS (Non--dissipative Gravitational Singularity) model, which
successfully describes the non--linear stage of evolution of perturbations (see
[1], [2] and references therein). This model predicts DM density distribution
$\rho(r) \sim r^{-\alpha}$ with $\alpha \simeq 1.8$ which holds from very small
distanc... | 1994-02-03 | 2010-11-30 | [
"hep-ph"
] | V. Berezinsky, A. Bottino and G. Mignola |
hep-ph/9402209 | Deep inelastic scattering at HERA and the BFKL pomeron | We present a BFKL phenomenology of structure functions in the framework of
the generalized BFKL equation for the dipole cross section proposed by us
recently. We show that the HERA measurements of excitation of charm at $Q^{2}
\lsim $10 GeV$^{2}$ allow determination of the intercept of the BFKL pomeron. A
comparison wi... | 1994-02-02 | 2016-08-14 | [
"hep-ph"
] | N.N. Nikolaev and B.G. Zakharov (IKP(Theorie), KFA J\"ulich J\"ulich,
Germany and L. D. Landau Institute for Theoretical Physics, Moscow) |
hep-ph/9402212 | A Precise Determination of $\tan\beta$ from Heavy Charged Higgs Decay | We compute the energy spectrum of charged leptons in the decay $H^+\to \bar
b+(t\to bl\nu_l)$. The shape of the lepton spectrum obtained, and also the mean
lepton energy, are sensitive to the handedness of the intermediate top quark.
This sensitivity can be used to precisely determine $\tan\beta$, a fundamental
paramet... | 1994-02-02 | 2009-10-28 | [
"hep-ph"
] | Andrzej Czarnecki and James L. Pinfold |
hep-ph/9402207 | A New Perspective on Electroweak Strings | The vortex solution (Z-string) of the electroweak interactions can be
interpreted as the 2-dimensional sphaleron at the top of a non-contractible
sphere. The same holds for another type of solution, the W-string. | 1994-02-02 | 2009-10-28 | [
"hep-ph",
"hep-th"
] | F. R. Klinkhamer and P. Olesen |
hep-ph/9402213 | Effect of Wavefunction Renormalisation in N-Flavour Qed3 at Finite
Temperature | A recent study of dynamical chiral symmetry breaking in N-flavour QED$_3$ at
finite temperature is extended to include the effect of fermion wavefunction
renormalisation in the Schwinger-Dyson equations. The simple ``zero-frequency''
truncation previously used is found to lead to unphysical results, especially
as $T \t... | 1994-02-02 | 2009-10-28 | [
"hep-ph",
"cond-mat",
"hep-lat",
"hep-th"
] | I.J.R. Aitchison and M. Klein-Kreisler |
hep-ph/9402206 | Low-energy sum rules and large-$N_c$ consistency conditions | The large-$N_c$ consistency conditions for axial vector and isovector
magnetic couplings of pions to baryons are discussed from the point of view of
low-energy current-algebra sum rules (Adler-Weisberger, Cabibbo-Radicati). In
particular, we show how the result that ratios of axial vector and isovector
magnetic couplin... | 1994-02-02 | 2009-10-28 | [
"hep-ph"
] | W. Broniowski |
hep-ph/9402205 | Heavy Baryons as Skyrmion with $1/m_Q$ Corrections | We take into account the $1/m_Q$ corrections upto $1/N_c$ order in the
heavy-meson-soliton bound state approach for heavy baryons. With these
corrections, the mass spectra of baryons with $c$-quark as well as of those
with $b$-quark are well reproduced. For charmed baryons, however, the
correction to the mass spectra a... | 1994-02-02 | 2009-10-28 | [
"hep-ph"
] | Yongseok Oh, Byung-Yoon Park and Dong-Pil Min |
hep-ph/9402211 | Supersymmetric Dark Matter: Relic Density and Detection | The Lightest Supersymmetric Particle (LSP) makes a good Dark Matter (DM)
candidate, since its relic density quite naturally comes out close to the
cosmologically required value. This is true even in minimal Supergravity models
with radiative symmetry breaking, which have a rather small number of free
parameters. On the... | 1994-02-02 | 2009-09-25 | [
"hep-ph"
] | M. Drees (Univ. of Wisconsin at Madison) |
hep-ph/9402204 | Fermion Scattering off CP-Violating Electroweak Bubble Wall | A general prescription to solve the Dirac equation in the presence of
CP-violating electroweak bubble wall is presented. The profile of the bubble
wall is not specified except that the wall height is $m_0$ and zero deep in the
broken- and the symmetric-phase regions, respectively, where $m_0$ is a fermion
mass given by... | 1994-02-02 | 2010-11-01 | [
"hep-ph"
] | K.Funakubo, A.Kakuto, S.Otsuki, K.Takenaga and F.Toyoda |
hep-ph/9402210 | Mesons with Beauty and Charm: Spectroscopy | Applying knowledge of the interaction between heavy quarks derived from the
study of $c\overline{c}$ and $b\overline{b}$ bound states, we calculate the
spectrum of $c\overline{b}$ mesons. We compute transition rates for the
electromagnetic and hadronic cascades that lead from excited states to the
$^1\text{S}_0$ ground... | 1994-02-02 | 2009-09-25 | [
"hep-ph"
] | Estia J. Eichten and Chris Quigg |
hep-ph/9402208 | Single-$W$ versus $W$-pair production at LEP~II | This paper is a study of the single-$W$ and $W$-pair production at LEP~II. I
show that the sensitivity of the single-$W$ production channel on the anomalous
trilinear couplings of $W$ is essentially the same as the sensitivity of the
channel $e^+e^-\to W^+W^-$. Therefore, even without the reconstruction of the
$W$ boso... | 1994-02-02 | 2009-10-28 | [
"hep-ph"
] | Costas G. Papadopoulos (CERN-Theory Division) |
hep-ph/9402201 | Relating the pion decay constant to the chiral restoration temperature | We review the relationship between the pion decay constant $f_\pi$, the
chiral symmetry restoration temperature $T_c$ and the phenomenology of low
energy chiral symmetry breaking in view of the recent confirmation of the
existence of a sigma meson with a mass of 600-700 MeV. | 1994-02-01 | 2009-10-28 | [
"hep-ph",
"nucl-th"
] | N. Bili\'c, J. Cleymans and M.D. Scadron |
hep-ph/9402202 | Dark Matter and Solar Neutrinos in SUSY | In the Supersymmetric extension of the Standard Model with minimal particle
content the three neutrinos can have non trivial masses and mixings, generated
at 1 loop due to renormalizable lepton number violating interactions. We show
that the resulting mass matrix can provide simultaneously a significant amount
of the D... | 1994-02-01 | 2009-09-25 | [
"hep-ph"
] | D. Tommasini |
hep-ph/9402203 | Radiative Decay of Vector Quarkonium: Constraints on Glueballs and Light
Gluinos | Given a resonance of known mass, width, and J^{PC}, we can determine its
gluonic branching fraction, b(R->gg), from data on its production in radiative
vector quarkonium decay, V -> gamma+R. For most resonances b(R->gg) is found to
be O(10%), consistent with being q-qbar states, but we find that both
pseudoscalars obse... | 1994-02-01 | 2008-11-26 | [
"hep-ph"
] | M. B. Cakir and G. R. Farrar |
hep-ph/9401354 | The Role of $\gamma_5$ in Dimensional Regularization | We discuss the consistency of a new \gf -scheme with renormalization. In
particular we study the power-counting behaviour of multiloop graphs to prove
its consistency. As a side effect we obtain a short proof of the Adler-Bardeen
theorem. Further we show that this \gf-scheme does not modify the BRST
identities at any l... | 1994-01-31 | 2007-05-23 | [
"hep-ph",
"hep-th"
] | Dirk Kreimer |
hep-ph/9401355 | Topics in Chiral Perturbation Theory | I consider some selected topics in chiral perturbation theory (CHPT). For the
meson sector, emphasis is put on processes involving pions in the isospin zero
S-wave which require multi-loop calculations. The advantages and shortcomings
of heavy baryon CHPT are discussed. Some recent results on the structure of the
baryo... | 1994-01-31 | 2009-10-28 | [
"hep-ph",
"nucl-th"
] | Ulf-G. Mei{\ss}ner |
hep-ph/9401357 | On normalization of QCD effects in $O(m_t^2)$ electroweak corrections | We point out that, contrary to some recent claims, there is no intrinsic
long-distance uncertainty in perturbative calculation of the QCD effects in the
$t \tb$ and $t \bb$ loops giving the electroweak corrections proportional to
$m_t^2$. If these corrections are expressed in terms of the ``on-shell" mass
$m_t$, the on... | 1994-01-31 | 2009-10-28 | [
"hep-ph"
] | Brian H. Smith and M.B. Voloshin |
hep-ph/9401356 | Model Calculation of Nucleon Structure Functions | Deep inelastic polarized and unpolarized structure functions for a free
nucleon are obtained in a modified Center-of-Mass bag model, which includes the
symmetry breaking effects from spin-dependent interactions. The quark
distribution functions, calculated at $Q_0^2\simeq$ (0.9GeV/c)$^2$, are evolved
to higher $Q^2$ re... | 1994-01-31 | 2014-11-17 | [
"hep-ph"
] | X. Song and J. S. McCarthy |
hep-ph/9401353 | Sea Contributions and Nucleon Structure | We suggest a general formalism to treat a baryon as a composite system of
three quarks and a `sea'. In this formalism, the sea is a cluster which can
consists of gluons and quark-antiquark pairs. The hadron wave function with a
sea component is given. The magnetic moments, related sum rules and axial weak
coupling cons... | 1994-01-30 | 2009-10-28 | [
"hep-ph"
] | X. Song and V. Gupta |
hep-ph/9401352 | Efficient Electroweak Baryogenesis from Lepton Transport | One mechanism for generating a baryon asymmetry at the electroweak phase
transition involves propagation of particle asymmetries generated by reflection
from the bubble walls into the unbroken phase. Hitherto attention has focussed
on top quarks because of their large mass and thus effective scattering from
bubble wall... | 1994-01-28 | 2010-11-01 | [
"hep-ph"
] | Michael Joyce, Tomislav Prokopec and Neil Turok |
hep-ph/9401351 | Constraints and Transport in Electroweak Baryogenesis | In unconstrained thermal equilibrium a local potential for total or fermionic
hypercharge does not bias electroweak anomalous processes. We consider two
proposed mechanisms for electroweak baryogenesis in this light. In
`spontaneous' baryogenesis, which was argued to apply in the `adiabatic' limit
of thick, slow walls,... | 1994-01-28 | 2009-10-28 | [
"hep-ph"
] | M. Joyce, T. Prokopec and N. Turok |
hep-ph/9401349 | Equivalence of Dimensional Reduction and Dimensional Regularisation | For some years there has been uncertainty over whether regularisation by
dimensional reduction (DRED) is viable for non-supersymmetric theories. We
resolve this issue by showing that DRED is entirely equivalent to standard
dimensional regularisation (DREG), to all orders in perturbation theory and for
a general renorma... | 1994-01-28 | 2009-10-28 | [
"hep-ph"
] | I. Jack, D. R. T. Jones and K. L. Roberts |
hep-ph/9401350 | $K^+\to\pi^+\nu\bar\nu$ Beyond Leading Logs and $V_{td}$ | The calculation of QCD corrections beyond the leading logarithmic
approximation for the short-distance dominated rare decay
$K^+\to\pi^+\nu\bar\nu$ is summarized. This analysis requires the complete
${\cal O}(\alpha_s)$ corrections to the top contribution to all orders in the
top-quark mass and a two-loop renormalizati... | 1994-01-28 | 2007-05-23 | [
"hep-ph"
] | Gerhard Buchalla |
hep-ph/9401348 | Production of four heavy quarks and $B_c$-mesons at the $Z^0$-boson pole | The cross-section for the production of $b{\bar b} c{\bar c}$ quarks in
$e^+e^-$ annihilation, that proves to be at a level of $\sigma (e^+e^-
\rightarrow b{\bar b} c{\bar c})/
\sigma (e^+e^- \rightarrow b{\bar b}) \sim 10^{-2}$ for ${\sqrt s}=M_Z$ is
calculated within the frames of the QCD perturbation theory. The c... | 1994-01-28 | 2011-01-27 | [
"hep-ph"
] | V.V. Kiselev, A.K. Likhoded, M.V. Shevlyagin |
hep-ph/9401340 | Non-trivial Test of Electroweak Quantum Effects | Based on recent $W$-mass measurements, the electroweak theory is tested at
non-trivial quantum correction level, i.e., beyond the Born approximation with
$\alpha(M_Z)$ instead of $\alpha$. We can conclude that some non-Born type
corrections must exist at more than 92 % confidence level, and the
non-decoupling top-quark... | 1994-01-27 | 2009-10-28 | [
"hep-ph"
] | Zenr\=o Hioki |
hep-ph/9401342 | Spin Force Dependence Of Nucleon Structure Functions | Deep inelastic structure functions for the nucleon are obtained in a
constituent quark model on the light cone. Parton model formulas are derived.
The negative slope of $F_{2}^{n}/F_{2}^{p} requires attraction between scalar
quark pairs. Color magnetism leads to a positive slope. 6 Figures are available
from author. Ty... | 1994-01-27 | 2009-10-28 | [
"hep-ph"
] | H.J. Weber |
hep-ph/9401339 | Scaling law for the $\Upsilon(4S) \to B \bar B$ and $\psi(3770) \to D
\bar D$ decay constants from effective sum rules | Sum rules for exclusive production of heavy meson pairs in $e^+e^-$
annihilation are used to evaluate the $\Upsilon(4S) \to B \bar B$ and
$\psi(3770) \to D \bar D$ decay widths. Infinitely heavy quark limit is
discussed, so that scaling law for the quarkonium-meson coupling constant is
derived. A value of the $B\bar B$... | 1994-01-27 | 2011-07-19 | [
"hep-ph"
] | V.V. Kiselev |
hep-ph/9401345 | Magnetic Moment of the $\Lambda_c$, $\Xi_{c1}^+$ and $\Xi_{c1}^0$ | The magnetic moment of the $\Lambda_c$, $\Xi_{c1}^+$ and $\Xi_{c1}^0$ vanish
when the charm quark mass is taken to infinity because the light degrees of
freedom are in a spin zero configuration. The heavy quark spin-symmetry
violating contribution from the light degrees of freedom starts at order
$1/m_c$, the same orde... | 1994-01-27 | 2009-10-28 | [
"hep-ph"
] | Martin J. Savage |
hep-ph/9401347 | Influence of Kaonic Resonances on the CP Violation in $B\to
K^*\gamma$Like Processes | We consider CP violating effects in decays of the type $B\rightarrow
k_i\gamma \rightarrow K\pi\gamma$, $K^*\pi\gamma$ and $K\rho\gamma$, where
$k_i$ represents a strange meson resonance. We include in our calculations five
of the low-lying resonances with quantum numbers ($J^P$) $1^-$, $1^+$ and
$2^+$. At the quark le... | 1994-01-27 | 2010-11-01 | [
"hep-ph"
] | D. Atwood and A. Soni |
hep-ph/9401346 | Strongly Interacting Longitudinal Gauge Bosons In Supersymmetric Models | A non-linear sigma model effective lagrangian is analyzed for theories in
which supersymmetry is softly broken at scales below the electroweak symmetry
breaking scale. Besides the gauge and matter supermultiplets, the low energy
theory contains only three Goldstone chiral multiplets. The higgsino, gaugino
as well as th... | 1994-01-27 | 2009-10-28 | [
"hep-ph"
] | Thomas E. Clark and Tonnis A. ter Veldhuis |
hep-ph/9401343 | Higgs Search by Neural Networks at LHC | We show that neural network classifiers can be used to discriminate Higgs
production from background at LHC for $ 150< M_H<200$ GeV. The results compare
favourably with ordinary multivariate analysis. | 1994-01-27 | 2009-10-28 | [
"hep-ph"
] | P. Chiappetta, P.Colangelo, P. De Felice, G. Nardulli, G. Pasquariello |
hep-ph/9401330 | Gluon dipole penguin contributions to $\epsilon'/\epsilon$ and CP
violation in Hyperon decays in the Standard Model | We consider the gluon dipole penguin operator contributions to
$\epsilon'/\epsilon$ and CP violation in hyperon decays. It has been proposed
by Bertolini et al. that the contribution to $\epsilon'/\epsilon$ may be
significant. We show that there is a cancellation in the leading order
contribution and this contribution ... | 1994-01-26 | 2010-11-01 | [
"hep-ph"
] | N.G. Deshpande, Xiao-Gang He and S. Pakvasa |
hep-ph/9401331 | Neutron Electric Dipole Moment in Two Higgs Doublet Model | We study the effect of the "chromo-electric" dipole moment on the electric
dipole moment(EDM) of the neutron in the two Higgs doublet model. We
systematically investigate the Weinberg's operator $O_{3g}=GG\t G$ and the
operator $O_{qg}=\bar q\sigma\t Gq$, in the cases of $\tan\b\gg 1$, $\tan\b\ll
1$ and $\tan\b\simeq 1... | 1994-01-26 | 2010-11-01 | [
"hep-ph"
] | Tkemi Hayashi, Yoshio Koide, Masahisa Matsuda and Morimitsu Tanimoto |
hep-ph/9401332 | How Can We Obtain a Large Majorana-Mass in Calabi-Yau Models ? | In a certain type of Calabi-Yau superstring models it is clarified that the
symmetry breaking occurs by stages at two large intermediate energy scales and
that two large intermediate scales induce large Majorana-masses of right-handed
neutrinos. Peculiar structure of the effective nonrenormalizable interactions
is cruc... | 1994-01-26 | 2017-02-01 | [
"hep-ph"
] | N.Haba, C.Hattori, M.Matsuda, T.Matsuoka and D.Mochinaga |
hep-ph/9401336 | A model for $q^2\bar{q}^2$ systems illustrated by an application to
$K\bar{K}$ scattering | In the paper is presented a four-body potential model for $q^2\bar{q}^2$
systems which includes both the spin and flavour degrees of freedom, extending
the formalism presented already in the spin independent situation. This allows
an application to a realistic situation, which is chosen to be $K\bar{K}$
scattering. It ... | 1994-01-26 | 2009-10-28 | [
"hep-ph"
] | B.Masud |
hep-ph/9401334 | What New Physics Can Double Beta Decay Experiments Hope to See? | Double-beta decay experiments have been traditionally interpreted in terms of
the Gelmini-Roncadelli triplet majoron model, which has been ruled out by LEP.
We briefly survey here the kinds of physics to which these experiments might be
sensitive in the light of the LEP constraints. We identify six broad categories
of ... | 1994-01-26 | 2007-05-23 | [
"hep-ph"
] | C.P. Burgess and J.M. Cline |
hep-ph/9401338 | The Values of $m_t$ and $\bar{\alpha_s}$ Derived from the
Non-Observation of Electroweak Radiative Corrections at LEP: Global Fit | A set of equations representing the $W/Z$ mass ratio and various observables
of $Z$ decays in terms of $\bar\alpha \equiv\alpha (m_Z)$, $G_{\mu}$, $m_Z$,
$m_t$, $m_H$, $\bar\alpha_{s} \equiv\alpha_{s} (m_Z)$, $m_b$ and $m_\tau$ (all
other fermion masses being neglected) are compared with the latest data of the
four LEP... | 1994-01-26 | 2009-10-28 | [
"hep-ph"
] | V.A. Novikov, L.B. Okun, A.N. Rozanov, M.I. Vysotsky and V.P. Yurov |
hep-ph/9401333 | BBBREM - Monte Carlo simulation of radiative Bhabha scattering in the
very forward direction | A fast and simple Monte Carlo program is presented that simulates single
Bremsstrahlung in Bhabha scattering, e+e- --> e+e-gamma, without constraints on
scattering angles. This allows the study of this process at arbitrarily small,
or even vanishing, scattering angles. Experimental cuts can be imposed on an
event-by-ev... | 1994-01-26 | 2009-10-28 | [
"hep-ph"
] | R. Kleiss and H. Burkhardt |
hep-ph/9401344 | Gluon Condensates, Quark Matter Equation of State and Quark Stars | We consider here quark matter equation of state including strange quarks and
taking into account a nontrivial vacuum structure for QCD with gluon
condensates. The parameters of condendsate function are determined from
minimisation of the thermodynamic potential. The scale parameter of the gluon
condensates is fixed fro... | 1994-01-26 | 2009-10-28 | [
"hep-ph",
"nucl-th"
] | A. Mishra and H. Mishra, P.K. Panda and S.P. Misra |
hep-ph/9401341 | The Isospin Independent Spin-Orbit Force in the Extended Skyrme Model | By using the product ansatz as an approximation for the two-baryon system we
investigate the isoscalar nucleon-nucleon spin-orbit potential in an extended
Skyrme model including both fourth- and sixth-order terms. As it is the case
for the Skyrme model, we still obtain the wrong sign for this interaction.
Nevertheless,... | 1994-01-26 | 2009-09-25 | [
"hep-ph"
] | Abdellatif Abada |
hep-ph/9401337 | Gauge Hierarchy in ${\bf SU(3)_c \times SU(3)_L \times SU(3)_R}$ and Low
Energy Implication | We explore the gauge hierarchy problem within the framework of supersymmetric
$SU(3)_c \times SU(3)_L \times SU(3)_R$ with a minimal set of higgs
supermultiplets. Imposition of a suitable discrete (alternatively $R$) symmetry
`prevents' the electroweak higgs doublets from becoming superheavy through
renormalizable coup... | 1994-01-26 | 2011-05-12 | [
"hep-ph"
] | G. Dvali and Q. Shafi |
hep-ph/9401335 | A new formulation of the effective theory for heavy particles | We derive the effective theories for heavy particles with a functional
integral approach by integrating away the states with high velocity and with
high virtuality. This formulation is non-perturbative and has a close
connection with the Wilson renormalization group transformation. The fixed
point hamiltonian of our tr... | 1994-01-26 | 2009-10-28 | [
"hep-ph",
"hep-th"
] | Ugo Aglietti and Stefano Capitani |
hep-ph/9401321 | QCD and Quark/Hadron Matter | A brief review on the recent theoretical progress in hot/dense QCD is given.
Special emphasis is put on the non-perturbative aspects of QCD plasma and the
modification of hadron proporties near the critical temperature of chiral
transition. | 1994-01-25 | 2007-05-23 | [
"hep-ph",
"nucl-th"
] | T. Hatsuda |
hep-ph/9401319 | Constraints From $b \to s\gamma$ on the Left-Right Symmetric Model | Recent results from the CLEO Collaboration on both inclusive and exclusive
radiative $B$ decays are used to constrain the parameter space of two versions
of the Left-Right Symmetric Model. In the first scenario, when the left- and
right-handed Cabibbo-Kobayashi-Maskawa mixing matrices are equal, $V_L=V_R$,
the radiativ... | 1994-01-25 | 2010-11-01 | [
"hep-ph"
] | Thomas G. Rizzo |
hep-ph/9401326 | $I=0,1$ $\pi\pi$ and $I=1/2$ $K\pi$ Scattering using Quark Born Diagrams | We extend the quark Born diagram formalism for hadron-hadron scattering to
processes with valence $q\bar q$ annihilation, specifically $I=0$ and $I=1$
$\pi\pi$ and $I=1/2$ $K\pi$ elastic scattering. This involves the $s$-channel
hybrid annihilation process $q^2\bar q^2 \to q\bar q g \to q^2\bar q^2$ and
conventional $s... | 1994-01-25 | 2009-09-25 | [
"hep-ph"
] | Z.Li, M.Guidry, T.Barnes and E.S.Swanson |
hep-ph/9401329 | Two-Loop Neutrino Masses and the Solar Neutrino Problem | The addition of $m$ singlet right-handed neutrinos to the Standard Model
leads to radiatively generated mass corrections for the $SU(2)_L $ doublet
neutrinos. For those neutrinos which are massless at the tree level after this
addition, this implies a small mass generated at the two-loop level via
$W^{\pm}$ exchange. W... | 1994-01-25 | 2011-09-21 | [
"hep-ph"
] | Debajyoti Choudhury, Raj Gandhi, J.A. Gracey and Biswarup
Mukhopadhyaya |
hep-ph/9401320 | Chiral Effects in the Confining QCD Vacuum | Confining configurations are introduced into the standard instanton vacuum
model. This drastically improves theoretical properties of the vacuum:
instanton size density $d(\rho)$ stabilizes at $\rho\sim 0.2 fm$, all chiral
effects are formulated in a gauge-invariant way and quarks are confined. An
interesting interplay... | 1994-01-25 | 2009-07-28 | [
"hep-ph"
] | Yu.A.Simonov |
hep-ph/9401323 | Non-Abelian Plane-Waves in the Quark-Gluon Plasma | We present new, non-abelian, solutions to the equations of motion which
describe the collective excitations of a quark-gluon plasma at high
temperature. These solutions correspond to longitudinal and transverse
plane-waves propagating through the plasma. | 1994-01-25 | 2009-10-28 | [
"hep-ph"
] | Jean-Paul Blaizot and Edmond Iancu |
hep-ph/9401324 | An introduction to technicolor | In these lectures we present the motivation for dynamical electroweak
symmetry breaking and its most popular realization, technicolor. We introduce
the basic ideas of technicolor and its companion theory of flavor, extended
technicolor. We review the classical theory of technicolor, based on naive
scaling from quantum ... | 1994-01-25 | 2016-10-26 | [
"hep-ph"
] | Kenneth Lane |
hep-ph/9401328 | QCD Constrains on the Shape of Polarized Quark and Gluon Distributions | We develop simple analytic representations of the polarized quark and gluon
distributions in the nucleon at low $Q^2$ which incorporate general constraints
obtained from the requirements of color coherence of gluon couplings at $x \sim
0$ and the helicity retention properties of perturbative QCD couplings at $x
\sim 1.... | 1994-01-25 | 2009-09-25 | [
"hep-ph"
] | Stanley J. Brodsky, Matthias Burkardt, and Ivan Schmidt |
hep-ph/9401325 | Experimental aspects of SU(5)xU(1) supergravity | We study various aspects of $SU(5)\times U(1)$ supergravity as they relate to
the experimental verification or falsification of this model. We consider two
string-inspired, universal, one-parameter, no-scale soft-supersymmetry-breaking
scenarios, driven by the $F$-terms of the moduli and dilaton fields. The model
is de... | 1994-01-25 | 2009-09-25 | [
"hep-ph"
] | J. Lopez, D. Nanopoulos, G. Park, X. Wang and A. Zichichi |
hep-ph/9401322 | What is the statistical significance of the solar neutrino flux problem? | Uniform random numbers, not Gaussian random numbers, should have been used
with Standard Solar Models to estimate the effect on the neutrino flux of
uncertainties in input data. The observed discrepancy is therefore probably
quite smaller than currently accepted. | 1994-01-25 | 2007-05-23 | [
"hep-ph"
] | Jacques Goldberg |
hep-ph/9401327 | A Theoretical Prediction for Exclusive Decays $B \rightarrow K(K^*)
\eta_c$ | The decay rates for the exclusive B decays $B \rightarrow K \eta_c $ and $B
\rightarrow K^* \eta_c$ are calculated in the context of the heavy quark
effective theory. We obtain $\Gamma (B \rightarrow K \eta_c )/\Gamma
(B\rightarrow K\psi )=1.6 \pm 0.2$ and $\Gamma (B\rightarrow K^*\eta_c)/\Gamma
(B \rightarrow K^*\psi ... | 1994-01-25 | 2009-10-28 | [
"hep-ph"
] | Mohammad R. Ahmady and Roberto R. Mendel |
hep-ph/9401316 | Photoproduction of $WH$ signal at electron-proton Colliders | We present the photoproduction of an intermediate mass Higgs (IMH) boson
associated with a $W$ boson at the future electron-proton colliders using
bremsstrahlung photon beam or laser backscattered photon beam. With
bremsstrahlung photon beam the search for the IMH boson is unfavorable because
of the small signal rate. ... | 1994-01-24 | 2009-10-28 | [
"hep-ph"
] | Kingman Cheung |
hep-ph/9401317 | Color, Spin and Flavor Diffusion in Quark-Gluon Plasmas | In weakly interacting quark-gluon plasmas diffusion of color is found to be
much slower than the diffusion of spin and flavor because color is easily
exchanged by the gluons in the very singular forward scattering processes. If
the infrared divergence is cut off by a magnetic mass, $m_{mag}\sim \alpha_sT$,
the color di... | 1994-01-24 | 2016-09-01 | [
"hep-ph"
] | H.Heiselberg |
hep-ph/9401313 | Vortex Solutions in Two-Higgs-Doublet Systems | We analyze the existence of string-like defects in a two-Higgs-doublet system
having $SU(2) \times U(1)_Y \times U(1)_{Y^{\prime}}$ as gauge group. We are
able to show that, when certain relations among the parameters hold, these
configurations satisfy a set of first order differential equations (Bogomol'nyi
equations)... | 1994-01-24 | 2009-10-28 | [
"hep-ph",
"hep-th"
] | G. Bimonte and G. Lozano |
hep-ph/9401315 | The Decay $\eta_c \rightarrow \gamma \gamma$ : A Test for Potential
Models | We use a simple perturbation theory argument and measurements of charmonium
leptonic widths $\Gamma (\psi_{NS} \rightarrow e^+e^-)$ to estimate the ratio
\mbox{$R_\circ \equiv {\vert \Psi _{\eta_{c1S}}(0) \vert}^2
/{\vert\Psi_{\psi_{1 S}}(0)\vert}^2$} in the general context of non-
relativistic potential models. We obt... | 1994-01-24 | 2009-10-28 | [
"hep-ph"
] | M. R. Ahmady and R. R. Mendel |
hep-ph/9401314 | Shadowing in the Deuteron and the New $F_2^n/F_2^p$ Measurements | The quantity $2F_2^d(x,Q^2)/F_2^p(x,Q^2)-1$ is calculated in the region of
low $x$ and low- and moderate $Q^2$ relevant for recent NMC and E665
measurements as well as for the expected final results of the precise NMC
analysis of their low $x$ data. The calculations include nuclear shadowing
effects and a suitable extr... | 1994-01-24 | 2009-12-30 | [
"hep-ph"
] | B. Badelek and J. Kwiecinski |
hep-ph/9401318 | Semiclassical transition probabilities for interacting oscillators | Semiclassical transition probabilities characterize transfer of energy
between "hard" and "soft" modes in various physical systems. We establish the
boundary problem for singular euclidean solutions used to calculate such
probabilities. Solutions are found numerically for a system of two interacting
quartic oscillators... | 1994-01-24 | 2009-10-28 | [
"hep-ph"
] | S.Yu. Khlebnikov |
hep-ph/9401312 | BFKL evolution and universal structure function at very small $x$ | The Balitskii-Fadin-Kuraev-Lipatov (BFKL) and the Gribov-Lipatov-
Dokshitzer-Altarelli-Parisi (GLDAP) evolution equations for the diffractive
deep inelastic scattering at ${1\over x} \gg 1$ are shown to have a common
solution in the weak coupling limit: $F_{2}(x,Q^{2})\propto
[\alpha_{S}(Q^{2})]^{-\gamma} \left({1\over... | 1994-01-24 | 2016-08-14 | [
"hep-ph"
] | N.N. Nikolaev and B.G. Zakharov (IKP(Theorie), KFA J\"ulich and L. D.
Landau Institute for Theoretical Physics, Moscow) |
hep-ph/9401311 | Phenomenology of models with more than two Higgs doublets | We study the most general Multi-Higgs-Doublet Model (MHDM) with Natural
Flavor Conservation (NFC). The couplings of a charged scalar $H_i^{\pm}$ to up
quarks, down quarks and charged leptons depend on three new complex parameters,
$X_i$, $Y_i$ and $Z_i$, respectively. We prove relations among these
parameters. We carry... | 1994-01-23 | 2010-11-01 | [
"hep-ph"
] | Yuval Grossman |
hep-ph/9401310 | QCD Phenomenology based on a Chiral Effective Lagrangian | We review the Nambu-Jona-Lasinio (NJL) approach to the dynamical breaking of
chiral symmetry in Quantum Chromodynamics (QCD). The subjects treated in Part I
include the vacuum structure of QCD, mass spectra and coupling constants of
hadrons, flavor mixing in mesons, the violation of the OZI rule in baryons, and
the val... | 1994-01-23 | 2010-11-01 | [
"hep-ph",
"nucl-th"
] | T. Hatsuda and T. Kunihiro |
hep-ph/9401309 | Viscosities of Quark-Gluon Plasmas | The quark and gluon viscosities are calculated in quark-gluon plasmas to
leading orders in the coupling constant by including screening. For weakly
interaction QCD and QED plasmas dynamical screening of transverse interactions
and Debye screening of longitudinal interactions controls the infrared
divergences. For stron... | 1994-01-22 | 2009-10-28 | [
"hep-ph"
] | H.Heiselberg |
hep-ph/9401306 | A Phenomenological Study of the Process
$e^+e^-\to\mu^+\mu^-\nu_l\bar\nu_l$ at High Energy $e^+e^-$ Colliders and
Measurement of the $ZWW$ and $\gamma WW$ Couplings | We perform a detailed study of the process $e^+e^-\to
\mu^+\mu^-\nu_l\bar\nu_l$ including all contributions. The contributions other
than from real gauge boson production leads to a rich phenomenology. We explore
the use of the process as a means of precision measurement of the $ZWW$ and
$\gamma WW$ vertices. We concen... | 1994-01-21 | 2009-10-28 | [
"hep-ph"
] | G. Couture and S. Godfrey |
hep-ph/9401300 | Transport Properties of Quark and Gluon Plasmas | The kinetic properties of relativistic quark-gluon and electron-photon
plasmas are described in the weak coupling limit. The troublesome Rutherford
divergence at small scattering angles is screened by Debye screening for the
longitudinal or electric part of the interactions. The transverse or magnetic
part of the inter... | 1994-01-21 | 2007-05-23 | [
"hep-ph"
] | H.Heiselberg |
hep-ph/9401301 | Comment on $D_s^* \to D_s \pi^0$ Decay | We calculate the rate for $D_s^* \rightarrow D_s \pi^0$ decay using Chiral
Perturbation Theory. This isospin violating process results from $\pi^0$ -
$\eta$ mixing, and its amplitude is proportional to $(m_d -
m_u)/\bigl(m_s-(m_u+m_d)/2 \bigr)$. Experimental information on the branching
ratio for $D_s^* \rightarrow D_s... | 1994-01-21 | 2009-10-28 | [
"hep-ph"
] | Peter Cho and Mark B. Wise |
hep-ph/9401304 | Relative distributions of W's and Z's at low transverse momenta | Despite large uncertainties in the $W^\pm$ and $Z^0$ transverse momentum
($q_T$) distributions for $q_T\lsim 10$ GeV, the ratio of the distributions
varys little. The uncertainty in the ratio of $W$ to $Z$ $q_T$ distributions is
on the order of a few percent, independent of the details of the
nonperturbative parameteri... | 1994-01-21 | 2009-12-30 | [
"hep-ph"
] | M. H. Reno |
hep-ph/9401305 | Quark-Resonance model | We construct an effective Lagrangian for low energy hadronic interactions
through an infinite expansion in inverse powers of the low energy cutoff
$\Lambda_\chi$ of all possible chiral invariant non-renormalizable interactions
between quarks and mesons degrees of freedom. We restrict our analysis to the
leading terms i... | 1994-01-21 | 2009-10-28 | [
"hep-ph"
] | E. Pallante and R. Petronzio |
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