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/9304292 | $N_c$-counting rules and the axial vector coupling constant of the
constituent quark | Instead of using a simple reggeon-exchange model, we provide a
model-independent estimate of high-energy contribution to the Adler-Weisberger
sum-rule. Results and conclusions of the paper remain unchanged. | 1993-04-23 | 2010-12-16 | [
"hep-ph"
] | W. Broniowski, M. Lutz and A. Steiner |
hep-ph/9304290 | Detecting an Intermediate Mass Charged Higgs at $\gamma \gamma$
Colliders | The detection of an intermediate mass charged Higgs boson at $\gamgam$
colliders via the modes $\gamgam \to H^+ H^- \to \nu \tau^+ \bar{\nu} \tau^-,~
c \bar{s} \bar{c} s,~$ and $ \nu \tau^+ \bar{c}s + c \bar{s} \bar{\nu} \tau^-$
is considered. $W^+ W^-$ boson pair production is the dominant background for
these modes. ... | 1993-04-23 | 2009-10-22 | [
"hep-ph"
] | David Bowser-Chao, Kingman Cheung, and Scott Thomas |
hep-ph/9304287 | Spectral Densities and Borel Transforms in Compton Scattering | We show that the leading double spectral density in sum rules for
Compton-like processes can be obtained by simple properties of the Borel
transform, extending an approach widely used in the literature on sum rules,
and known to be valid only for the spectral densities of form factors. The
extension is illustrated in t... | 1993-04-22 | 2025-02-05 | [
"hep-ph"
] | Claudio Corian\`o |
hep-ph/9304289 | On the Determination of the Gluon Density of the Proton from
Heavy-Flavour Production at HERA | Using a recent next-to-leading-order calculation of the photoproduction
double differential cross section for heavy quarks, we study the possibility of
extracting the gluon density of the proton from heavy-quark photoproduction
data. We discuss the theoretical uncertainties connected with this method, and
we conclude t... | 1993-04-22 | 2010-11-01 | [
"hep-ph"
] | Stefano Frixione Michelangelo L. Mangano Paolo Nason and Giovanni
Ridolfi |
hep-ph/9304288 | A Model of Universality Violation Revisited | The possibility that the interactions of the third generation of quarks and
leptons may violate universality by a small amount remains an open experimental
question. The model of Li and Ma, which naturally accommodates such violations,
is found to be highly constrained by newly obtained, high precision electroweak
and ... | 1993-04-22 | 2009-10-22 | [
"hep-ph"
] | T.G. Rizzo |
hep-ph/9304284 | On Daisy and Superdaisy Resummation of the Effective Potential at Finite
Temperature | We describe in detail, in the context of the simple scalar $\phi^4$ theory,
the prescription for resummation of daisy and superdaisy diagrams in the
effective potential using the solution of the gap equations in the infrared
limit. We find that the latter procedure is consistent provided we neglect
logarithmic terms fr... | 1993-04-21 | 2007-05-23 | [
"hep-ph"
] | Mariano Quir\'os |
hep-ph/9304280 | Hadronic Transitions among Quarkonium States in a
Soft-Exchange-Approximation. Chiral Breaking and Spin Symmetry Breaking
Processes | Although no asymptotic heavy quark spin symmetry, and even more no flavor
symmetry, are expected for systems such as quarkonium, a numerical discussion
shows that for some processes and in a preasymptotic region which may roughly
include charmonium and bottomonium, the use of the spin-symmetry may be useful
in conjunct... | 1993-04-21 | 2010-11-01 | [
"hep-ph"
] | R. Casalbuoni, A. Deandrea, N. Di Bartolomeo, R. Gatto, F. Feruglio
and G. Nardulli |
hep-ph/9304286 | Cabibbo-allowed nonleptonic weak decays of charmed baryons | Cabibbo-allowed nonleptonic weak decays of charmed baryons
$\lamc,~\xin,~\xip$ and $\Omega_c^0$ into an octet baryon and a pseudoscalar
meson are analyzed. The nonfactorizable contributions are evaluated under pole
approximation, and it turns out that the $s$-wave amplitudes are dominated by
the low-lying $\halfm$ reso... | 1993-04-21 | 2014-11-17 | [
"hep-ph"
] | Hai-Yang Cheng and B. Tseng |
hep-ph/9304283 | Asymptotic behaviour of the total cross section of p-p scattering and
the Akeno cosmic ray data | I present a new determination of the total cross section for proton-proton
collisions from the recent Akeno results on absorption of the cosmic ray
protons in the p-Air collisions. Extrapolation to the SSC energy suggests
$\sigma_{tot}(p-p) \approx (160-170) mb$. I also comment on a possible
sensitivity of the p-Air cr... | 1993-04-21 | 2009-12-30 | [
"hep-ph"
] | N.N.Nikolaev |
hep-ph/9304282 | The Effects of the Massless O(alpha_s^2), O(\alpha\alpha_s), O(\alpha^2)
QCD and QED Corrections and of the Massive Contributions to
Gamma(H^0\rightarrow b\overline{b}) | We consider in detail various theoretical uncertainties of the perturbative
predictions for the decay width of $H^0\rightarrow b\overline{b}$ process in
the region $50\ GeV< M_H\leq 2M_W$. We calculate the order
$O(\alpha_s^2)$-contributions to the expression for $\Gamma_{Hb\overline{b}}$
through the pole quark mass an... | 1993-04-21 | 2007-05-23 | [
"hep-ph"
] | A.L.Kataev and V.T.Kim |
hep-ph/9304278 | The vacuum structure in a supersymmetric gauged Nambu-Jona-Lasinio model | The dynamical breakdown of the $SU(2) \times U(1)$ symmetry triggered by a
top-antitop condensate is studied in a supersymmetric version of the gauged
Nambu-Jona-Lasinio model. An effective potential approach is used to
investigate the vacuum structure and the equivalence with the minimal
supersymmetric standard model.... | 1993-04-21 | 2009-10-22 | [
"hep-ph"
] | P. Binetruy, E.A. Dudas and F. Pillon |
hep-ph/9304281 | Non-Standard Gauge-Boson Self-Interactions within a Gauge Invariant
Model | We examine dimension-six extensions of the standard electroweak Lagrangian
which are invariant under local \suu -transformations. The dimension-four
trilinear and quadrilinear effective interactions of the vector bosons with one
another are found to coincide with the vector boson interactions previously
derived from gl... | 1993-04-21 | 2009-10-22 | [
"hep-ph"
] | Carsten Grosse-Knetter, Ingolf Kuss and Dieter Schildknecht |
hep-ph/9304285 | Oblique electroweak corrections and triple vector boson couplings | We relate all $C$-- and $P$--invariant anomalous triple vector--boson
couplings to the oblique electroweak parameters. LEP constraints on the latter
then yield the strongest and most general simultaneous bounds to date on the
former. Even if the oblique parameters assume their Standard Model values
precisely, these bou... | 1993-04-21 | 2008-02-03 | [
"hep-ph"
] | Debajyoti Choudhury, Probir Roy and Rahul Sinha |
hep-ph/9304274 | Consistency and lattice renormalization of the effective theory for
heavy quarks | The effective theory describing infinite mass particles with a given
velocity, has a great interest in heavy flavor physics. It has the unpleasant
characteristic that the energy spectrum is unbounded from below; this fact is
the source of the problems in the formulation of the euclidean theory. In this
paper we present... | 1993-04-20 | 2010-11-01 | [
"hep-ph"
] | Ugo Aglietti |
hep-ph/9304277 | Probing supergravity models with the $b\to s\gamma$ microscope | We present a calculation of the branching ratio $\brbsg$ in two well
motivated supersymmetric models: the minimal $SU(5)$ and the no-scale flipped
$SU(5)$ supergravity models. We find that the improved CLEO upper bound
($\brbsg<5.4\times10^{-4}$ at 95\% CL) does not yet constrain the minimal
$SU(5)$ supergravity model,... | 1993-04-20 | 2009-12-30 | [
"hep-ph"
] | J. Lopez, D. Nanopoulos, and G. Park |
hep-ph/9304276 | Diffraction and the Gluon Mass | We recently proposed a QCD-Pomeron described by the exchange of two
non-perturbative gluons characterized by a dynamically generated gluon mass. It
is here shown that data on elastic scattering, exclusive $\rho$ production in
deep inelastic scattering and the $J/\Psi$-nucleon total cross-section can be
successfully des... | 1993-04-20 | 2011-07-19 | [
"hep-ph"
] | M.B. Gay Ducati, F. Halzen, and A.A. Natale |
hep-ph/9304273 | Chemical equilibrium in QCD gas in the early universe | We compute the thermally averaged $\qq$--annihilation rate into two and three
gluons in the early universe. We show that at very high temperatures $\qq\to
ggg$ represents only a 3\%\ correction to $\qq\to gg$. Comparing the
annihilation rate to the Hubble rate, corrected for particle interactions in
the Standard Model ... | 1993-04-20 | 2009-10-22 | [
"hep-ph"
] | Kari Enqvist and Jukka Sirkka |
hep-ph/9304279 | Supersymmetric Corrctions to Masses and Widths | Supersymmetric radiative corrections to the partial width $\Gamma (\tau
\rightarrow e \nu \bar{\nu})$ and the masses of the $W$ and $Z$ gauge bosons
are calculated in different renormalization schemes. The importance of the
non-universal contributions is analyzed. | 1993-04-20 | 2008-02-03 | [
"hep-ph"
] | P. Gosdzinsky |
hep-ph/9304275 | Chiral Corrections to the S-Wave Pion-Nucleon Scattering Lengths | We calculate the chiral corrections to Weinberg's prediction for the S--wave
$\pi N$ scattering lengths up--to--and--including order ${\cal O}(M_\pi^3)$
making use of heavy baryon chiral perturbation theory. For the isospin--odd
scattering length $a^-$ these corrections are small and bring the prediction
closer to the ... | 1993-04-20 | 2009-10-22 | [
"hep-ph",
"nucl-th"
] | V. Bernard, N. Kaiser and Ulf-G. Mei{\ss}ner |
hep-ph/9304272 | Dynamics of Phase Transitions Induced by a Heat Bath | We study the non-equilibrium dynamics of a symmetry restoring phase
transition in a scalar field theory, the ``system'', linearly coupled to
another scalar field taken as a ``heat bath''. The ``system'' is initially in
an ordered low temperature phase, and the heat bath is at a temperature close
to the critical tempera... | 1993-04-19 | 2014-11-17 | [
"hep-ph"
] | Da-Shin Lee and Daniel Boyanovsky |
hep-ph/9304270 | Electromagnetic Production of Quarkonium in $Z^{0}$ decay | The decay $Z^{0}\rightarrow Q+ \ell^{+}\ell^{-}$, where $Q$ is a
$J^{PC}=1^{--}$ quarkonium state, has a very clean final state, which should
make it easy to detect. The branching ratio of this mode is greater than
$10^{-6}$ for $\rho$, $\phi$, and $\psi$, indicating that these processes may
be detectable at LEP. | 1993-04-19 | 2009-10-22 | [
"hep-ph"
] | Sean Fleming |
hep-ph/9304267 | Spontaneous CP Violation and Baryogenesis in the Minimal Supersymmetric
Standard Model | We investigate the effects of the spontaneous CP violation at finite
temperature in the Minimal Supersymmetric Standard Model on the baryogenesis at
the weak scale. After a brief discussion of the case in which the electroweak
phase transition is of the second order, we study in details the baryogenesis
scenario when t... | 1993-04-19 | 2010-03-17 | [
"hep-ph"
] | D. Comelli, M. Pietroni and A. Riotto |
hep-ph/9304269 | Custodial SU(2) Violation and the Origin of Fermion Masses | Custodial $SU(2)$ breaking due to dynamical fermion masses is studied in a
rather general context and it is shown how some well known limiting cases are
correctly described. The type of ``gap equation'' which can systematically lead
to extra negative contributions to the so--called $\rho$--parameter is
emphasized. Furt... | 1993-04-19 | 2009-10-22 | [
"hep-ph"
] | A. Blumhofer and M. Lindner |
hep-ph/9304268 | A QCD Relation Between Hyperfine Splittings in Isospin doublets - A
Light Quark Symmetry? | Recent data on the $D^*$ masses confirm the QCD prediction based on the
\REF{\ICHJL}{Isaac Cohen and Harry J. Lipkin, \plb{84}{323}{1979}} very general
assumption $\({\ICHJL}\)$ that the spin-dependence of the quark couplings to
photons and gluons have the same structure and differ only in the value of the
coupling con... | 1993-04-19 | 2009-10-22 | [
"hep-ph"
] | Harry J. Lipkin |
hep-ph/9304271 | Overview of Accelerator Long Baseline Neutrino Oscillation Experiments | There is renewed interest in performing a long baseline neutrino oscillation
experiment using accelerator neutrinos because of a discrepancy between the
measured and the predicted values of the ratio of electron to muon neutrinos
produced in the upper atmosphere by cosmic rays.The approximate range in
oscillation param... | 1993-04-19 | 2007-05-23 | [
"hep-ph"
] | Stephen Parke |
hep-ph/9304266 | Unconventional superstring derived E$_{\bf 6}$ models and neutrino
phenomenology | Conventional superstring derived E$_6$ models can accommodate small neutrino
masses if a discrete symmetry is imposed which forbids tree level Dirac
neutrino masses but allows for radiative mass generation. Since the only
possible symmetries of this kind are known to be generation dependent, we
explore the possibility ... | 1993-04-18 | 2009-10-22 | [
"hep-ph"
] | Enrico Nardi |
hep-ph/9304262 | Constituent Quark Couplings and QCD in the Large $N_c$ Limit | It is shown that in the constituent quark model of Georgi-Manohar, the
dispersion relation that leads to the Adler-Weisberger sum rule for the axial
vector coupling $g_A$ requires a subtraction constant. This fact explains the
discrepancy between the results of different recent estimates of the $1/N_c$
corrections to W... | 1993-04-16 | 2008-11-26 | [
"hep-ph"
] | Santiago Peris and Eduardo de Rafael |
hep-ph/9304263 | Constraints on Anomalous Gauge Boson Couplings From $b \to s\gamma$ | The recent results of the CLEO Collaboration on both inclusive and exclusive
radiative $B$ decays are combined with those of the UA2 Collaboration on
$W\gamma$ production to highly constrain the anomalous trilinear gauge
couplings of the $W$. The theoretical analysis of the $b \to s\gamma$ process
employs, next-to-lead... | 1993-04-16 | 2009-09-09 | [
"hep-ph"
] | T.G.Rizzo |
hep-ph/9304261 | Valley Method Versus Instanton-Induced Effective Lagrangean Up to
$(E/E_{\rm sphaleron})^{8/3}$ | We compare the two most popular approaches to the problem of
instanton-antiinstanton interaction at high energies - the valley method and
the effective-Lagrangian approach - and use them to calculate the
next-to-next-to-leading term in the expansion of ``holy grail'' function
determining the cross section with baryon n... | 1993-04-16 | 2009-10-22 | [
"hep-ph"
] | I. Balitsky and A. Sch\"afer |
hep-ph/9304264 | Hadronic contribution to the photon vacuum polarization: a theoretical
estimate | A simple model for the hadronic contribution to the photon vacuum
polarization function $\Pi_{had}(q^2)$, for spacelike momenta, is presented.
For small momenta, the two loop contribution from the pseudoscalar meson octet
is computed from the chiral Lagrangian. The light quark contribution (which at
low momentum gives ... | 1993-04-16 | 2009-10-22 | [
"hep-ph"
] | B. Holdom, Randy Lewis and Roberto R. Mendel |
hep-ph/9304260 | Is Geodetic Precession of Massive Neutrinos the solution to the Solar
Neutrino Problem? | We examine a recent suggestion by Milburn that slightly massive electron
neutrinos, produced left-handed at the core of the sun, suffer geodetic
precession adequate to render them right-handed (and therefore sterile) in
sufficient numbers to solve the solar neutrino problem. In that light, we
perform a complete, genera... | 1993-04-16 | 2010-04-06 | [
"hep-ph",
"gr-qc"
] | Stamatis Vokos |
hep-ph/9304259 | Parke-Taylor amplitudes in the multi-Regge kinematics | The Parke-Taylor multigluon amplitudes are examined in the multi-Regge
kinematics, which assumes strong rapidity ordering of the produced gluons, and
are used to compute the $n$-gluon production cross section and the gluon-gluon
total cross section. | 1993-04-16 | 2009-10-22 | [
"hep-ph"
] | Vittorio Del Duca |
hep-ph/9304265 | Chiral Dynamics and Heavy Quark Symmetry in a Toy Field Theoretic Model | We study a solvable QCD--like toy theory, a generalization of the
Nambu--Jona-Lasinio model, which implements chiral symmetries of light quarks
and heavy quark symmetry. The chiral symmetric and chiral broken phases can be
dynamically tuned. This implies a parity doubled heavy--light meson system,
corresponding to a $(... | 1993-04-16 | 2010-11-01 | [
"hep-ph"
] | William A. Bardeen, and Christopher T. Hill |
hep-ph/9304256 | Electroweak bubbles and sphalerons | We consider non-perturbative solutions of the Weinberg-Salam model at finite
temperature. We employ an effective temperature-dependent potential yielding a
first order phase transition. In the region of the phase transition, there
exist two kinds of static, spherically symmetric solutions: sphalerons and
bubbles. We an... | 1993-04-15 | 2009-10-22 | [
"hep-ph"
] | Yves Brihaye and Jutta Kunz |
hep-ph/9304254 | Resummation Methods at Finite Temperature: The Tadpole Way | We examine several resummation methods for computing higher order corrections
to the finite temperature effective potential, in the context of a scalar
$\phi^4$ theory. We show by explicit calculation to four loops that dressing
the propagator, not the vertex, of the one-loop tadpole correctly counts
``daisy'' and ``su... | 1993-04-15 | 2011-07-19 | [
"hep-ph"
] | C. Glenn Boyd, David E. Brahm, and Stephen D.H. Hsu |
hep-ph/9304257 | The $\Delta S=1$ Effective Hamiltonian Including Next-to-Leading Order
QCD and QED Corrections | In this paper we present a calculation of the $\Delta S=1$ effective weak
Hamiltonian including next-to-leading order QCD and QED corrections. At a scale
$\mu$ of the order of few GeV, the Wilson coefficients of the operators are
given in terms of the renormalization group evolution matrix and of the
coefficients compu... | 1993-04-15 | 2009-10-22 | [
"hep-ph"
] | M. Ciuchini, E. Franco, G. Martinelli, L. Reina |
hep-ph/9304255 | Model Independent Higgs Boson Mass Limits at LEP | We derive model-independent constraints on Higgs mass and couplings from
associated signals for higher masses, accessible at LEP2. This work is
motivated by the fact that, in many extensions of the standard model, the Higgs
boson can have substantial "invisible" decay modes, for example, into light or
massless weakly i... | 1993-04-15 | 2009-09-17 | [
"hep-ph"
] | A. Lopez-Fernandez, J. C. Rom\~ao, F. de Campos and J. W. F. Valle |
hep-ph/9304258 | Quarkonium Decays and Light Quark Masses | The $SU(3)$-violating decays $\Phi^{2S} \goto \Phi^{1S} X$, where $X = \pi^0$
or $\eta$ and $\Phi = J/\psi$ or $\Upsilon$ have been recently proposed as a
means of probing the light quark masses beyond leading order in chiral
perturbation theory. We argue that this analysis is incorrect, even in the
heavy quark limit. ... | 1993-04-15 | 2009-09-15 | [
"hep-ph"
] | Markus A. Luty and Raman Sundrum |
hep-ph/9304251 | Decay-Time Asymmetries at the B-Factories | Absract (Invited talk at the X DAE High Energy Physics symposium in December
1992, held at Tata Institute of Fundamental Research, Bombay) | 1993-04-14 | 2010-11-01 | [
"hep-ph"
] | K. V. L. Sarma |
hep-ph/9304253 | QCD Sum Rules: The Second Decade | Invited Talk at the Conference "QCD -- 20 Years Later", June 9 - 13, 1992,
Aachen, Germany | 1993-04-14 | 2007-05-23 | [
"hep-ph"
] | M.A. Shifman (TPI, University of Minnesota) |
hep-ph/9304252 | Selected Topics on Rare Kaon Processes - in the Standard Model and
Supergravity - | Rare kaon processes appear to be particularly suitable to study the
extensions of the standard model, especially if the possibility for eventual
direct evidence becomes unlikely. In this review, we discuss processes that are
important as a test of either the standard model or supergravity. Moreover,
some of these are i... | 1993-04-14 | 2010-11-01 | [
"hep-ph"
] | Neven Bilic and Branko Guberina |
hep-ph/9304247 | A Predictive Inflationary Scenario Without The Gauge Singlet | We propose a new realization of the chaotic inflationary scenario in which
the scalar field responsible for inflation also spontaneously breaks the
underlying gauge symmetry at a superheavy scale $\sim 10^{15} - 10^{17}\; GeV$.
A possible framework is provided by the superstring inspired gauge models, in
which case sev... | 1993-04-13 | 2008-11-26 | [
"hep-ph"
] | G. Lazarides and Q. Shafi |
hep-ph/9304246 | Nuclear Force in the Skyrme Model: Quasistatic Approach | Dynamics of two-Skyrmion systems is studied in the quasistatic approach. The
quasistatic approach enables us to formulate the collective coordinate
quantization of two-Skyrmion systems consistently with the 1/Nc expansion. By
constructing quasistatic field configurations for largely separated two
Skyrmions, their energ... | 1993-04-13 | 2010-11-01 | [
"hep-ph"
] | Makoto Oka |
hep-ph/9304248 | Identifying the Higgs Boson in Electron--Photon Collisions | We analyze the production and detection of the Higgs boson in the next
generation of linear $e^+e^-$ colliders operating in the $e\gamma$ mode. In
particular, we study the production mechanism $e + \gamma \rightarrow e \gamma
\gamma \rightarrow e + H$, where one photon is generated via the laser
backscattering mechanis... | 1993-04-13 | 2009-10-22 | [
"hep-ph"
] | O. J. P. Eboli, M. C. Gonzalez-Garcia and S. F. Novaes |
hep-ph/9304250 | Bounding the Photon Mass with Solar Probes | Proposed close-encounter solar probes (Vulcan and Solar Probe) are planned to
have highly eccentric orbits, with a perihelion of about $4R_S$ and an
inclination close to $90^\circ$ out of the plane of the ecliptic. We show this
could allow at least an order-of-magnitude improvement in the present directly
measured limi... | 1993-04-13 | 2009-09-25 | [
"hep-ph"
] | V. Alan Kosteleck\'y and Michael Martin Nieto |
hep-ph/9304249 | String-Based Perturbative Methods for Gauge Theories | Recent progress in the computation of one-loop gluon amplitudes is reviewed.
These methods were originally derived from superstring theory and are
significantly more efficient than conventional Feynman rules. With these
methods, explicit computations can be performed beyond those achieved by
traditional methods. | 1993-04-13 | 2007-05-23 | [
"hep-ph"
] | Zvi Bern |
hep-ph/9304245 | Metastability in Two Dimensions and the Effective Potential | We study analytically and numerically the decay of a metastable phase in
(2+1)-dimensional classical scalar field theory coupled to a heat bath, which
is equivalent to two-dimensional Euclidean quantum field theory at zero
temperature. By a numerical simulation we obtain the nucleation barrier as a
function of the para... | 1993-04-12 | 2009-10-22 | [
"hep-ph",
"cond-mat",
"hep-lat"
] | M. Alford and M. Gleiser |
hep-ph/9304244 | Is the World Supersymmetric? Do We Already Know? | In addition to the very good theoretical motivations for supersymmetry, there
are now at least nine phenomenological indications that nature is
supersymmetric. All are indirect, so more is better. They are enumerated here.
Some discussion is also given of models, of when and where superpartners might
be directly detect... | 1993-04-12 | 2007-05-23 | [
"hep-ph"
] | G.L. Kane |
hep-ph/9304243 | A Bargmann-Wightman-Wigner Type Quantum Field Theory | This version corrects an inportant typographical error in Eq. 17. COMMENTS,
FOR THE RECORD: A referees reoprt from Phys. Rev. Lett. read in part ``The
first named author has appreciated my exceptionally long report. He has read
and well assimilated the literature I suggested. Congratulations! This very new
version of t... | 1993-04-10 | 2008-11-26 | [
"hep-ph"
] | D. V. Ahluwalia, M. B. Johnson and T. Goldman |
hep-ph/9304242 | Origin of spontaneous violation of the Lorentz symmetry: Vortices in the
cosmos | By carefully studying the (1,0)+(0,1) representation space for massive
particles we point to the existence of certain inherent tachyonic dispersion
relations: E^2= p^2-m^2. We put forward an interpretation that exploits these
``negative mass squared'' solutions; rotational invariance is spontaneously
broken. Relevance ... | 1993-04-10 | 2008-11-26 | [
"hep-ph",
"astro-ph"
] | D. V. Ahluwalia and T. Goldman |
hep-ph/9304241 | Re-Examination of Generation of Baryon and Lepton Number Asymmetries by
Heavy Particle Decay | It is shown that wave function renormalization can introduce an important
contribution to the generation of baryon and lepton number asymmetries by heavy
particle decay. These terms, omitted in previous analyses, are of the same
order of magnitude as the standard terms. A complete cancellation of leading
terms can resu... | 1993-04-09 | 2008-11-26 | [
"hep-ph"
] | Jiang Liu and Gino Segre |
hep-ph/9304238 | Large Multiplicity Gluon Production in QCD | We compute the approximate cross section $\sigma_n^{(0)}$ for producing $n-2$
{\it resolved} gluons in a gluon-gluon collision, using the Parke-Taylor
formula regularized in a Lorentz invariant manner. We find, in double leading
logarithm approximation, that \[ \sigma_{n}^{(0)} \approx \frac{1}{s} \left(
\frac{N_c\alph... | 1993-04-08 | 2009-10-22 | [
"hep-ph"
] | Haim Goldberg and Rogerio Rosenfeld |
hep-ph/9304230 | Reduced Effective Lagrangians | Effective Lagrangians, including those that are spontaneously broken, contain
redundant terms. It is shown that the classical equations of motion may be used
to simplify the effective Lagrangian, even when quantum loops are to be
considered. | 1993-04-08 | 2009-10-22 | [
"hep-ph"
] | C. Arzt |
hep-ph/9304234 | On the Evaluation of Thermal Corrections to False Vacuum Decay Rates | We examine the computation of the nucleation barrier used in the expression
for false vacuum decay rates in finite temperature field theory. By a detailed
analysis of the determinantal prefactor, we show that the correct bounce
solution used in the computation of the nucleation barrier should not include
loop correctio... | 1993-04-08 | 2009-10-22 | [
"hep-ph"
] | M. Gleiser, G. C. Marques, and R. O. Ramos |
hep-ph/9304235 | SUSY signals at HERA in the no-scale flipped SU(5) supergravity model | Sparticle production and detection at HERA are studied within the recently
proposed no-scale flipped $SU(5)$ supergravity model. Among the various
reaction channels that could lead to sparticle production at HERA, only the
following are within its limit of sensitivity in this model: $e^-p\to \tilde
e^-_{L,R}\chi^0_i+X,... | 1993-04-08 | 2009-08-25 | [
"hep-ph"
] | J. Lopez, D. Nanopoulos, X. Wang, and A. Zichichi |
hep-ph/9304239 | Ratios of $W^\pm\gamma$ and $Z\gamma$ Cross Sections: New Tools in
Probing the Weak Boson Sector at the Tevatron | The ratios ${\cal R}_{\gamma ,\ell}=B(Z\to\ell^+\ell^-)\cdot\sigma(Z\gamma)
/\allowbreak B(W\to\ell\nu)\cdot\sigma(W^\pm\gamma)$, ${\cal R}_{\gamma , \nu}=
B(Z\to\bar\nu\nu)\cdot\sigma(Z\gamma)/\allowbreak B(W\to\ell\nu)\cdot\sigma(W^
\pm\gamma)$, ${\cal R}_{W\gamma}=\sigma(W^\pm\gamma)/\allowbreak\sigma(W^\pm)$,
and $... | 1993-04-08 | 2009-10-22 | [
"hep-ph"
] | U. Baur, S. Errede, and J. Ohnemus |
hep-ph/9304233 | Strongly Interacting W's and Z's and the Existence of a Heavy Fourth
Generation of Fermions | By employing the dictum that axiomatic principles are devoid of predictive
power, we find that the elastic unitarity constraint, applied to strong
W$_L$W$_L$ scattering, does not alter the assumed spectrum of intermediate
states. We consider intermediate states involving a heavy Higgs and heavy
fermions of a hypothetic... | 1993-04-08 | 2009-10-22 | [
"hep-ph"
] | Silas R. Beane and Samir Varma |
hep-ph/9304237 | Measuring Charm and Bottom Quark Masses | The meaning and the extraction of heavy quark masses are discussed. A simple
production model is presented which incorporates the running of the heavy quark
mass into perturbative calculations. The model offers the possibilities of (i)
understanding the differing charmed mass values extracted from different
experiments... | 1993-04-08 | 2007-05-23 | [
"hep-ph"
] | Thomas J. Weiler and K. Ghafoori--Tabrizi |
hep-ph/9304231 | Phenomenology of Spin Zero Mesons and Glueballs | We discuss the phenomenology of scalar and pseudoscalar mesons, emphasizing
those which do not carry manifest flavor quantum numbers. Many of the
properties of these mesons are still not fully understood. Some of them
probably do not have the usual two-quark (quark-antiquark) structure, but may
be mixed with glueball s... | 1993-04-08 | 2007-05-23 | [
"hep-ph"
] | M. Genovese, D.B. Lichtemberg and E. Predazzi |
hep-ph/9304236 | Decoupling in Non-Perturbative Background Fields: the Thermal Sphaleron | Standard decoupling of heavy fermions may fail when there are
non-perturbative variations in a scalar field which gives masses to the
fermions. One situation of phenomenological relevance is the case of sphalerons
in the presence of fermions at finite temperatures. The free energy of a simple
model is determined using ... | 1993-04-08 | 2010-11-01 | [
"hep-ph",
"hep-th"
] | Thomas M. Gould and I.Z. Rothstein |
hep-ph/9304240 | The Electroweak Chiral Lagrangian and New Precision Measurements | A revised and complete list of the electroweak chiral lagrangian operators up
to dimension-four is provided. The connection of these operators to the $S$,
$T$ and $U$ parameters and the parameters describing the triple gauge boson
vertices $WW\gamma$ and $WWZ$ is made, and the size of these parameters from
new heavy ph... | 1993-04-08 | 2009-10-22 | [
"hep-ph"
] | T. Appelquist and G. Wu |
hep-ph/9304232 | Quark correlation functions in deep inelastic semi-inclusive processes | We investigate one-particle semi-inclusive processes in lepton-hadron
scattering. In unpolarized scattering order $Q^{-1}$ corrections appear only
when transverse momenta are detected. We consider the twist two and three
matrix elements and calculate the semi-inclusive structure functions in terms
of quark correlation ... | 1993-04-08 | 2009-12-15 | [
"hep-ph"
] | J. Levelt and P.J. Mulders |
hep-ph/9304227 | Tau Polarimetry with Inclusive Decays | The spin asymmetry parameter $A_\tau$ characterizing the angular distribution
of the total hadron momentum in the decay of a polarized tau can be calculated
rigorously using perturbative QCD and the operator product expansion.
Perturbative QCD corrections to the free quark result $A_\tau = 1/3$ can be
expressed as a po... | 1993-04-07 | 2009-10-22 | [
"hep-ph"
] | Eric Braaten |
hep-ph/9304228 | Observing the Inflaton Potential | We show how observations of the density perturbation (scalar) spectrum and
the gravitational wave (tensor) spectrum allow a reconstruction of the
potential responsible for cosmological inflation. A complete functional
reconstruction or a perturbative approximation about a single scale are
possible; the suitability of e... | 1993-04-07 | 2009-10-22 | [
"hep-ph",
"astro-ph",
"gr-qc"
] | Edmund J. Copeland, Edward W. Kolb, Andrew R. Liddle, and James E.
Lidsey |
hep-ph/9304229 | Constraints on Majoron Models, Neutrino Masses and Baryogenesis | We derive strong contraints on the Yukawa couplings and the vacuum
expectation value in the singlet majoron model, taking into account the
possibility of a small gravitationally induced mass for the majoron. If the
present baryon asymmetry was created earlier than at the electroweak phase
transition, then to preserve i... | 1993-04-07 | 2009-09-15 | [
"hep-ph"
] | James M. Cline, Kimmo Kainulainen and Keith A. Olive |
hep-ph/9304226 | Why a Scalar Explanation of the L3 Events is Implausible | We investigate the question of whether an additional light neutral scalar can
explain the $l^+ l^- \gamma \gamma$ events with high invariant mass photon
pairs recently observed by the L3 collaboration. We parameterize the low energy
effects of the unknown dynamics in terms of higher dimensional effective
operators. We ... | 1993-04-06 | 2009-09-15 | [
"hep-ph"
] | Lisa Randall and Nuria Rius |
hep-ph/9304219 | Parameter--free calculation of $D \rightarrow P P$ in a weak--gauged
$U(4)_L \otimes U(4)_R$ Chiral Lagrangian Model | We analyze the decay modes of charmed mesons into two--pseudoscalars in a
weak--gauged U(4)_L x U(4)_R chiral lagrangian model. The calculation is free
of unknown parameters and only requires as inputs the masses of pseudoscalars
and the decay constant of the pion. The general pattern of the results at
leading order co... | 1993-04-06 | 2009-10-22 | [
"hep-ph"
] | F.J. Botella, S. Noguera, J. Portol\'es |
hep-ph/9304222 | Probes of Heavy Meson Substructure in $e^+ e^-$ annihilation | We apply Heavy Quark Effective Theory to the production of $0^-$ and $1^-$
$Q\bar{q}$ states in $e^+ e^-$ annihilation. We show that HQET implies that the
electric quadrupole amplitudes vanish and we propose tests for this theory. We
also show how HQET can be applied to distinguish the $^3D_1$ and $^3S_1$
$Q\bar{Q}$ st... | 1993-04-06 | 2009-10-22 | [
"hep-ph"
] | F.E.Close and G.J.Gounaris |
hep-ph/9304221 | The Process " Pbar P -> E- E+ " with Polarized Initial Particles and
Proton Form Factors in Time-Like Region | The discussion on the asymptotical behaviour of the form factors in the
space-like and time-like regions have been corrected and clarified. Fig.3 has
been replaced by an improved analysis of the data. | 1993-04-06 | 2010-11-15 | [
"hep-ph"
] | S.M. Bilenky, C. Giunti and V. Wataghin |
hep-ph/9304220 | Electroweak Magnetism, W-condensation and Anti-Screening | We review how external magnetic fields act as perfect probes of the
non-abelian nature of the electroweak theory. | 1993-04-06 | 2007-05-23 | [
"hep-ph",
"hep-th"
] | Jan Ambjorn and Poul Olesen |
hep-ph/9304223 | Unified Universal Seesaw Models | A set of Grand Unified Theories based upon the gauge groups $SU(5)_\L \times
SU(5)_\R$, $SO(10)_\L \times SO(10)_\R$ and $SU(4)_\C \times SU(4)_\L \times
SU(4)_\R$ is explored. Several novel features distinguish these theories from
the well-known $SU(5)$, $SO(10)$ and $SU(4)_\C \times SU(2)_\L \times SU(2)_\R$
models w... | 1993-04-06 | 2008-11-26 | [
"hep-ph"
] | Peter Cho |
hep-ph/9304225 | QCD Predictions for Lepton Spectra in Inclusive Heavy Flavour Decays | We derive the lepton spectrum in semileptonic beauty decays from a
nonperturbative treatment of QCD; it is based on an expansion in $1/m_Q$ with
$m_Q$ being the heavy flavour quark mass. The leading corrections arising on
the $1/m_Q$ level are completely expressed in terms of the difference in the
mass of the heavy had... | 1993-04-06 | 2011-05-05 | [
"hep-ph"
] | I.I.Bigi, M.Shifman, N.G.Uraltsev, A. Vainshtein |
hep-ph/9304224 | Top Quark and Charged Higgs: Linked by Radiative Corrections | Some aspects of the phenomenology of the top quark and the charged Higgs are
studied, emphasizing relations due to radiative corrections. Production
mechanisms at the SSC are mentioned, and decay modes are analyzed including
radiative corrections to the charged Higgs mass and couplings. The constraints
due to the decay... | 1993-04-06 | 2007-05-23 | [
"hep-ph"
] | Marco A. Diaz |
hep-ph/9304218 | Exact Supersymmetric Amplitude for \kkb\/ and \bbb\/ Mixing | We present the most general supersymmetric amplitude for \kkb\/ and \bbb\/
mixing resulting from gluino box diagrams. We use this amplitude to place
general constraints on the magnitude of flavor-changing squark mass mixings,
and compare these constraints to theoretical predictions both in and beyond the
Minimal Supers... | 1993-04-05 | 2010-11-01 | [
"hep-ph"
] | John S. Hagelin, S. Kelley and Toshiaki Tanaka |
hep-ph/9304211 | New Bounds on Leptoquark Couplings | We derive new bounds on scalar leptoquark couplings from K^0 K^0 bar, D^0 D^0
bar and B^0 B^0 bar mixing. Although leptoquarks contribute to these processes
only at one loop, their contribution is large, due to the lack of GIM
cancelation. Our bounds have two important features: (i) They bound g^4/M^2, in
contrast to t... | 1993-04-05 | 2010-11-01 | [
"hep-ph"
] | Miriam Leurer (Weizmann Institute) |
hep-ph/9304216 | Accurate Neutralino Relic Density Computations in Supergravity Models | We investigate the question of the proper thermal averaging of neutralino
annihilation amplitudes which possess poles and thresholds, as they impact on
the calculated neutralino relic density and therefore on the cosmological
viability of supersymmetric models. We focus on two typical resonances, namely
the $Z$ boson a... | 1993-04-05 | 2009-10-22 | [
"hep-ph"
] | J. Lopez, D. Nanopoulos, and K. Yuan |
hep-ph/9304213 | Phenomenological Description of an Unstable Fermion | We present a phenomenological description for an unstable fermion based upon
one-loop renormalization of quantum field theory. It is emphasized that wave
function renormalization can introduce important $CP$-conserving and
$CP$-violating phases. Implications for the study of $CP$ violation are
examined. Applications ar... | 1993-04-05 | 2007-05-23 | [
"hep-ph"
] | Jiang Liu |
hep-ph/9304217 | Static Properties of Quark Solitons | It has been conjectured that at distances smaller than the confinement scale
but large enough to allow for nonperturbative effects, QCD is described by an
effective $SU(N_c {\times} N_f)_L\times SU(N_c {\times} N_f)_R$ chiral
Lagrangian. The soliton solutions of such a Lagrangian are extended objects
with spin ${1\over... | 1993-04-05 | 2009-10-22 | [
"hep-ph"
] | Gonen Gomelski, Marek Karliner, and Stephen B. Selipsky |
hep-ph/9304214 | Skyrmions and Semilocal Strings in Cosmology | It has been pointed out that cosmic string solutions can exist in gauge field
theories with broken symmetry even when $\pi _1(G/H)$ is trivial. The stability
of such semilocal defects is not guaranteed by topology and depends on
dynamical considerations. In the literature it has been tacitly assumed that if
stable, suc... | 1993-04-05 | 2009-10-22 | [
"hep-ph",
"hep-th"
] | Katherine Benson and Martin Bucher |
hep-ph/9304215 | Calculated Electron Fluxes at Airplane Altitudes | A precision measurement of atmospheric electron fluxes has been performed on
a Japanese commercial airliner (Enomoto, {\it et al.}, 1991). We have performed
a monte carlo calculation of the cosmic ray secondary electron fluxes expected
in this experiment. The monte carlo uses the hadronic portion of our neutrino
flux c... | 1993-04-05 | 2009-12-30 | [
"hep-ph",
"astro-ph"
] | R.K. Schaefer, T.K. Gaisser, and T.S.Stanev |
hep-ph/9304212 | Decorated-box-diagram-contributions to Bhabha scattering. (I) | We evaluate, in the high-energy limit, $s\gg|t|\gg m^2\gg\lambda^2$, the sum
of amplitudes corresponding to a class of Feynman diagrams describing two-loop
virtual photonic corrections to Bhabha scattering. The diagrams considered are
box and crossed box diagrams with an extra photon decorating one of the fermion
lines... | 1993-04-05 | 2009-10-22 | [
"hep-ph"
] | G\"oran F\"aldt and Per Osland |
hep-ph/9304210 | Power Corrections to QCD Sum Rules for Compton Scattering | We extend previous work on sum rules for the invariant amplitudes of pion
Compton scattering by deriving a complete lowest order perturbative spectral
function - and its leading non perturbative power corr ections - for a specific
combination of the two helicities $(H_1 + H_2)$ of this process. Using some
properties of... | 1993-04-04 | 2009-10-22 | [
"hep-ph"
] | Claudio Coriano' |
hep-ph/9304207 | Heavy Top Quark Effects in Vertices with Light External Fermions | We extend our previous work on non-linear realization of the top quark field,
which is a consequence of its being much heavier than any other scales. One
loop effective Lagrangian to account for virtual top effects is constructed in
this article, for processes where there are two external fermions, as well as
any numbe... | 1993-04-04 | 2009-10-22 | [
"hep-ph"
] | G.-L. Lin, H. Steger and Y.-P. Yao |
hep-ph/9304208 | Integral correlation measures for multiparticle physics | We report on a considerable improvement in the technique of measuring
multiparticle correlations via integrals over correlation functions. A
modification of measures used in the characterization of chaotic dynamical
sytems permits fast and flexible calculation of factorial moments and cumulants
as well as their differe... | 1993-04-03 | 2009-10-22 | [
"hep-ph"
] | H.C. Eggers, P. Lipa, P. Carruthers and B. Buschbeck |
hep-ph/9304209 | Search for the intermediate Mass Higgs Signal at TeV $e\gamma$ colliders | The intermediate mass Higgs (IMH) can be abundantly produced through the
process $e^-\gamma \rightarrow W^-H\nu$ at TeV $e^-\gamma$ colliders, which are
realized by the laser back-scattering method. We search for the signature of
$W^-H \rightarrow (jj)(b\bar b)$ plus missing transverse momentum, with and
without consid... | 1993-04-03 | 2009-10-22 | [
"hep-ph"
] | Kingman Cheung |
hep-ph/9304205 | See-saw Enhancement of Lepton Mixing | The see-saw mechanism of neutrino mass generation may enhance lepton mixing
up to maximal even if the Dirac mass matrices of leptons have structure similar
to that in the quark sector. Two sets of conditions for such an enhancement are
found. The first one includes the see-saw generation of heavy Majorana masses
for ri... | 1993-04-02 | 2009-10-22 | [
"hep-ph"
] | Alexei Yu. Smirnov |
hep-ph/9304204 | From Kaon-Nuclear Interactions to Kaon Condensation | An effective chiral Lagrangian in heavy-fermion formalism whose parameters
are constrained by kaon-nucleon and kaon-nuclear interactions next to the
leading order in chiral expansion is used to describe kaon condensation in
dense ``neutron star" matter. The critical density is found to be robust with
respect to the par... | 1993-04-02 | 2011-07-19 | [
"hep-ph",
"astro-ph",
"nucl-th"
] | G.E. Brown, C.-H. Lee, M. Rho and V.Thorsson |
hep-ph/9304206 | Effective-Lagrangian approach to precision measurements: the anomalous
magnetic moment of the muon | We investigate the use of effective Lagrangians to describe the effects on
high-precision observables of physics beyond the Standard Model. Using the
anomalous magnetic moment of the muon as an example, we detail the use of
effective vertices in loop calculations. We then provide estimates of the
sensitivity of new exp... | 1993-04-02 | 2011-07-19 | [
"hep-ph"
] | C. Arzt, M.B. Einhorn, and J. Wudka |
hep-ph/9303324 | R-Parity Violating SUSY Model | This is a phenomenological review of $R$ parity violating SUSY models, with
particular emphasis on explicit $R$ parity violation. | 1993-04-01 | 2009-10-22 | [
"hep-ph"
] | D.P. Roy |
hep-ph/9304201 | Chiral Symmetry and Electroweak pi,K,eta Processes | Recently the development of chiral perturbation theory has allowed the
generation of rigorous low-energy theorems for various hadronic processes based
only on the chiral invariance of the underlying QCD Lagrangian. Herein we
examine the experimental implications of chiral symmetry in the regime of
electroweak Goldstone... | 1993-04-01 | 2007-05-23 | [
"hep-ph"
] | Barry R. Holstein |
hep-ph/9304202 | Isospin splitting in heavy baryons and mesons | A recent general analysis of light-baryon isospin splittings is updated and
extended to charmed baryons.
The measured $\Sigma_c$ and $\Xi_c$ splittings stand out as being difficult
to understand in terms of two-body forces alone.
We also discuss heavy-light mesons; though the framework here is necessarily
less gene... | 1993-04-01 | 2009-10-22 | [
"hep-ph",
"nucl-th"
] | R. E. Cutkosky and Paul Geiger |
hep-ph/9304203 | Baryogenesis, Domain Walls and the Role of Gravity | It has been recently speculated that global symmetries are broken by gravity.
We propose a scenario for the generation of the baryon asymmetry in the early
Universe in which the domain walls predicted by theories with discrete
symmetries become unstable due to these Planck scale effects. The relative
motion of the deca... | 1993-04-01 | 2009-10-22 | [
"hep-ph"
] | H. Lew and A. Riotto |
hep-ph/9303325 | Radiative Electroweak Parameters | The status of the present precision measurements of electroweak observables
is reviewed with specific reference to the radiative parameters $S,T,U$ or
equivalently $\epsilon_1,\epsilon_2,\epsilon_3$. The significance of the
obliqueness hypothesis is underlined and the importance of the ``local fit''
method of extractin... | 1993-04-01 | 2015-06-25 | [
"hep-ph"
] | Probir Roy |
hep-ph/9303322 | Nullification of multi-Higgs threshold amplitudes in the Standard Model | We show that nullification of all tree-order threshold amplitudes involving
Higgs particles in the Standard Model occurs, provided that certain equations
relating the masses of all existing elementary particles to the mass of the
Higgs scalar are satisfied. The possible role of these relations in restoring
the high-mul... | 1993-03-31 | 2009-10-22 | [
"hep-ph"
] | E.N. Argyres, R. Kleiss and C.G. Papadopoulos |
hep-ph/9303319 | Self-mass for Massive Quark | We study the behavior of the self-mass for a quark with a current mass larger
than $\Lambda_QCD$, as a function of its Euclidean momentum and mass, in QCD.
An expression for the Bethe-Salpeter kernel of the Schwinger-Dyson (SD)
equation valid in both the infrared and ultraviolet regions is obtained based
on a renormali... | 1993-03-31 | 2009-10-22 | [
"hep-ph"
] | Zheng Huang and K.S. Viswanathan |
hep-ph/9303323 | Beyond the Standard Model with Effective Lagrangians | An Effective Lagrangian description is useful for describing potential
physics beyond the Standard Model. The method is illustrated by reference to
interactions among the electroweak bosons ($W^\pm$ \& $Z^0$). The resulting
estimates of the magnitude of these corrections suggest that they would be at
best marginally de... | 1993-03-31 | 2008-02-03 | [
"hep-ph"
] | Martin B. Einhorn (U. of Michigan) |
hep-ph/9303321 | Multiscalar amplitudes to all orders in perturbation theory | A method for calculating loop amplitudes at the multiboson threshold is
presented, based on Feynman-diagram techniques. We explicitly calculate the
one-loop amplitudes in both $\phi^4$-symmetric and broken symmetry cases, using
dimensional regularization. We argue that, to all orders in the perturbation
expansion, the ... | 1993-03-31 | 2009-10-22 | [
"hep-ph"
] | E.N. Argyres, Ronald H.P. Kleiss and Costas G. Papadopoulos |
hep-ph/9303320 | Stitching the Yukawa Quilt | We develop a systematic analysis of quark mass matrices which, starting with
the measured values of quark masses and mixing angles, allows for a model
independent search for all possible (symmetric or hermitian) mass matrices
having texture zeroes at the unification scale. A survey of all six and five
texture zero stru... | 1993-03-31 | 2010-11-01 | [
"hep-ph"
] | P. Ramond, R.G. Roberts, G.G. Ross |
hep-ph/9303314 | Gauge Invariance and Anomalous Dimensions of a Light-Cone Wilson Loop in
Light-Like Axial Gauge | Complete two-loop calculation of a dimensionally regularized Wilson loop with
light-like segments is performed in the light-like axial gauge with the
Mandelstam-Leibbrandt prescription for the gluon propagator. We find an
expression which {\it exactly} coincides with the one previously obtained for
the same Wilson loop... | 1993-03-30 | 2009-10-22 | [
"hep-ph"
] | A.Bassetto, I.A.Korchemskaya, G.P.Korchemsky and G.Nardelli |
hep-ph/9303315 | Possible Implications of a Light Gluino | Light gluinos have been suggested in order to reconcile $\alpha_s$
determinations from low energy deep inelastic experiments with those inferred
from LEP measurements. {}From this hypothesis then one expects, in unified N=1
supergravity models, that also the "photino" will be light. We show that this
possibility is not... | 1993-03-30 | 2007-05-23 | [
"hep-ph"
] | F. de Campos and J. W. F. Valle |
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