id large_stringlengths 9 16 | title large_stringlengths 1 382 | abstract large_stringlengths 3 6.09k | publish_date date32 | update_date date32 | categories large listlengths 1 13 | authors large_stringlengths 3 62.8k |
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hep-ph/9302241 | Medley in finite temperature field theory | I discuss three subjects in thermal field theory: why in \sun gauge theories
the \zn symmetry is broken at high (instead of low) temperature, the possible
singularity structure of gauge variant propagators, and the problem of how to
compute the viscosity from the Kubo formula. | 1993-02-09 | 2015-06-25 | [
"hep-ph"
] | R. D. Pisarski |
hep-ph/9302240 | The renormalization of the axial anomaly in dimensional regularization | The prescription for the $\gamma_5$-matrix within dimensional regularization
in multiloop calculations is elaborated. The three-loop anomalous dimension of
the singlet axial current is calculated. | 1993-02-09 | 2014-11-17 | [
"hep-ph"
] | S.A. Larin |
hep-ph/9302232 | Polarized $q\to\Lambda$ Fragmentation Functions from
$e^+e^-\to\Lambda+X^*$ | Measurement of the helicity asymmetric cross section for semi-inclusive
production of $\Lambda$-hyperons in $e^+e^-$ annihilation near the $Z^0$
resonance allows a complete determination of the spin-dependent fragmentation
functions for the different quark flavors into the $\Lambda$. The parity
violating, self analyzin... | 1993-02-08 | 2009-10-22 | [
"hep-ph"
] | M. Burkardt and R. L. Jaffe |
hep-ph/9302235 | Complementarity and Chiral Fermions in SU(2) gauge Theories | Complementarity - the absence of a phase boundary separating the Higgs and
confinement phases of a gauge theory - can be violated by the addition of
chiral fermions. We utilize chiral symmetry violating fermion correlators such
as $ \langle \bps \psi \rangle $ as order parameters to investigate this issue.
Using inequa... | 1993-02-08 | 2009-10-22 | [
"hep-ph",
"hep-lat"
] | Stephen D.H. Hsu |
hep-ph/9302234 | Improved LEP lower bound on the lightest SUSY Higgs mass from Radiative
Electroweak Breaking and its Experimental Consequences | We show that the present LEPI lower bound on the Standard Model Higgs boson
mass ($M_H\gsim60\GeV$) applies as well to the lightest Higgs boson ($h$) of
the minimal $SU(5)$ and no-scale flipped $SU(5)$ supergravity models. This
result would persist even for the ultimate LEPI lower bound ($M_H\gsim70\GeV$).
We show that... | 1993-02-08 | 2009-08-25 | [
"hep-ph"
] | J. Lopez, D. Nanopoulos, H. Pois, X. Wang, and A. Zichichi |
hep-ph/9302231 | QCD Sum Rule and Perturbative QCD Approaches to Pion Compton Scattering | We compare two approaches to the description of pion Compton scattering at
moderate momentum transfer, one being based on local duality QCD sum rules for
the invariant amplitudes of the process, which have been derived recently, and
the other on the modified factorization formula with Sudakov effects included.
We find ... | 1993-02-08 | 2010-11-01 | [
"hep-ph"
] | Claudio Coriano' and Hsiang-nan Li |
hep-ph/9302230 | CP violation in Higgs decays | We study CP violation in fermion pair decays of Higgs boson. We idenfy some
CP odd observables related to the tree level decay amplitude. We find that a
few thousand Higgs boson decay events can already provide important information
about CP violation. If the Higgs boson is produced, such an analysis could be
carried o... | 1993-02-08 | 2010-11-01 | [
"hep-ph"
] | Xiao-Gang He, J.P. Ma and Bruce McKellar |
hep-ph/9302233 | Partition function for the eigenvalues of the Wilson line | In a gauge theory at nonzero temperature the eigenvalues of the Wilson line
form a set of gauge invariant observables. By constructing the corresponding
partition function for the phases of these eigenvalues, we prove that the
trivial vacuum, where the phases vanish, is a minimum of the free energy. | 1993-02-08 | 2009-10-22 | [
"hep-ph",
"hep-lat"
] | A. Gocksch and R. D. Pisarski |
hep-ph/9302229 | Neutrino masses from discrete gauge symmetries | We investigate a model with an extra $Z_{2}$ gauge symmetry in the Standard
Model. We assume that only the scalars and the leptons carry non-zero charge.
The symmetry gives a structure to the mass matrix for the neutrinos. With two
extra Higgs singlets and two extra singlet right-handed neutrinos we can build
a model t... | 1993-02-06 | 2009-10-22 | [
"hep-ph"
] | Jihn E. Kim and B-A Lindholm |
hep-ph/9302228 | Z\rightarrow A^0 A^0\nu\bar\nu$ and $e^+e^-\rightarrow A^0 A^0 Z$ in Two
Higgs Doublet Models | In LEP searches for the neutral CP-odd scalar $A^0$ of a multi-Higgs doublet
model, experimenters have searched for $Z\rightarrow h^0 A^0$ (where $h^0$ is
the lightest CP-even scalar). No model-independent limit on the $A^0$ mass can
be deduced from present data if $m_{h^0}>m_Z$. In this paper, we compute the
rates for... | 1993-02-06 | 2009-10-22 | [
"hep-ph"
] | Howard E. Haber and Yosef Nir |
hep-ph/9302226 | Inelastic Channels in WW Scattering | If the electroweak symmetry-breaking sector becomes strongly interacting at
high energies, it can be probed through longitudinal $W$ scattering. We present
a model with many inelastic channels in the $W_L W_L$ scattering process,
corresponding to the production of heavy fermion pairs. These heavy fermions
affect the el... | 1993-02-05 | 2008-11-26 | [
"hep-ph"
] | S. G. Naculich and C.-P. Yuan |
hep-ph/9302225 | Higher Order Corrections to Jet Cross Sections in Hadron Colliders | We describe a general method of calculating the fully differential cross
section for the production of jets at next-to-leading order in a hadron
collider. This method is based on a `crossing' of next-to-leading order
calculations with all partons in the final state. The method introduces
universal crossing functions th... | 1993-02-05 | 2008-11-26 | [
"hep-ph"
] | Walter T. Giele, E. W. Nigel Glover, David A. Kosower |
hep-ph/9302223 | Inflation, Neutrino Baryogenesis, and (S)Neutrino-Induced Baryogenesis | We evaluate the constraints that the COBE observations put on baryogenesis in
inflationary cosmologies.We consider the supersymmetric version of the proposal
of Fukugita and Yanagida, that the baryon asymmetry of the universe is created
by nonperturbative electroweak reprocessing of a lepton asymmetry generated in
the ... | 1993-02-05 | 2009-09-15 | [
"hep-ph"
] | B.A. Campbell, S. Davidson, and K.A. Olive |
hep-ph/9302227 | A Natural Solution to the MU Problem | We propose a simple mechanism for solving the $\mu$ problem in the context of
minimal low--energy supergravity models. This is based on the appearance of
non--renormalizable couplings in the superpotential. In particular, if $H_1H_2$
is an allowed operator by all the symmetries of the theory, it is natural to
promote t... | 1993-02-05 | 2008-11-26 | [
"hep-ph"
] | J.A. Casas and C. Munoz |
hep-ph/9302221 | On the Baryon, Lepton-Flavour and Right-Handed Electron Asymmetries of
the Universe | Non-perturbative electroweak effects, in thermal equilibrium in the early
universe, have the potential to erase the baryon asymmetry of the universe,
unless it is encoded in a B-L asymmetry, or in some "accidentally" conserved
quantity. We first consider the possibility that the BAU may be regenerated
from lepton flavo... | 1993-02-05 | 2009-09-11 | [
"hep-ph"
] | B.A. Campbell, S. Davidson, J. Ellis, And K.A. Olive |
hep-ph/9302220 | Vortex Solutions in Two-Higgs Systems and $\tan\beta$ | Classical vortex solutions in various two-Higgs systems are studied. The
systems we consider include the standard model with two Higgs doublets, in
which case the vortex appears as part of a string-like object. The Higgs
potentials contain several different couplings in general and the spontaneous
symmetry breaking inv... | 1993-02-05 | 2008-02-03 | [
"hep-ph",
"hep-th"
] | HoSeong La |
hep-ph/9302222 | Supersymmetric (S)Neutrino-Mass Induced Baryogenesis | We propose a new mechanism for baryogenesis in supersymmetric extensions of
the standard model, that does not depend on (super)GUT interactions. It occurs
by the non-perturbative electroweak reprocessing of a lepton asymmetry. This
lepton asymmetry is generated by the effects of lepton number violating induced
operator... | 1993-02-05 | 2009-09-15 | [
"hep-ph"
] | B.A. Campbell, S. Davidson, and K.A. Olive |
hep-ph/9302224 | Radiative Corrections to the Neutral Higgs Spectrum in Supersymmetry
with a Gauge Singlet | The radiative corrections to the $3\times3$scalar and the $2\times2$
pseudoscalar neutral Higgs boson massmatrices are calculated in the
supersymmetric extension of the standard model including a gauge singlet
superfield in the effective potential approach. The full $t$ and $b$
quark/squark contributions including the ... | 1993-02-05 | 2009-10-22 | [
"hep-ph"
] | Ulrich Ellwanger |
hep-ph/9302218 | One Loop Corrections To The Lightest Higgs Mass In The Minimal $\eta $
Model | We have evaluated the one loop correction to the bound on the lightest Higgs
mass valid in the minimal, $ E_{6}$ based, supersymmetric $ \eta$ model. Under
the assumption that the theory remains perturbative up to the $10^{16}$ GeV
scale, we derive a conservative bound that decreases with the top mass for $M_t
\leq 2 M... | 1993-02-04 | 2009-10-22 | [
"hep-ph"
] | D.Comelli and C.Verzegnassi (Dept. of Theorical Physics, University of
Trieste and INFN sez.di Trieste) |
hep-ph/9302217 | Violations of Dashen's Theorem | The electromagnetic contribution to the $K^+ - K^0$ mass difference is
calculated in the $1/N_c$ approach including the $SU(3)$ breaking contributions
due to a non-zero strange quark mass. The short-distance contribution can be
unambiguously determined in terms of the known parameters of the
next-to-leading order chira... | 1993-02-04 | 2009-10-22 | [
"hep-ph"
] | J. Bijnens |
hep-ph/9302216 | Production of two hard isolated photons in
$e^+e^-\to\mu^+\mu^-\gamma\gamma$ at LEP | A calculation of the hard bremsstrahlung process e+ e- -> mu+ mu- gamma gamma
is presented and compared with recent results from the L3 Collaboration. | 1993-02-04 | 2009-10-22 | [
"hep-ph"
] | K. Ko{\l}odziej, F. Jegerlehner and G. J. van Oldenborgh |
hep-ph/9302215 | The Breaking of the SU(3)^3 Gauge Group | We discuss why the SU(3)^3 supersymmetric model with the most general
superpotential can naturally break to the standard model if gauge singlets and
a discrete symmetry are included. This mechanism does away with the need for
fine-tuning in the form of the assumed absence of certain terms in the
superpotential. It also... | 1993-02-04 | 2007-05-23 | [
"hep-ph"
] | Meng Y. Wang and Eric D. Carlson |
hep-ph/9302219 | Semileptonic $\pi$ and $K$ Decays and the Chiral Anomaly at One-loop | We calculate the $O(p^6)$ corrections to the anomalous form factors appearing
in $\pi^+$, $K^+ \to e^+ \nu \gamma,\ \mu^+\nu\gamma$ and $K_{l4}$ decays in
Chiral Perturbation Theory. The relevant dimension $6$ terms of the lagrangian
are evaluated assuming their saturation by the vector meson contribution. | 1993-02-04 | 2009-10-22 | [
"hep-ph"
] | Ll. Ametller, J. Bijnens, A. Bramon and F. Cornet |
hep-ph/9302211 | Small-Size Instanton Corrections to the $\tau$ Hadronic Width | We compute the effect of small-size instanton corrections to current-current
correlators, for all combinations of axial, vector, and possibly flavour
non-diagonal currents. We apply our result to the hadronic decays of the $\tau$
lepton, in order to assess the reliability of the determination of $\as$ from
the $\tau$ h... | 1993-02-03 | 2009-10-22 | [
"hep-ph"
] | P. Nason and M. Porrati |
hep-ph/9302206 | Searching for T,CP,CPT,and \Delta S = \Delta Q rule violations in the
neutral K meson system - a guide | It is known that the existing experimental limit for$ CPT $ violation is
rather poor; the 10 \% level at best. The $ \DSDQ $ rule is tested only up to 2
\%. In this note, we discuss the possibility of measuring $ T, CP, CPT $ and $
\DSDQ $ rule violations in the neutral $ K $ meson system. It is shown that not
all the ... | 1993-02-03 | 2008-11-26 | [
"hep-ph"
] | M.Hayakawa and A.I.Sanda |
hep-ph/9302209 | Long Distance Contributions to B-Decays into Higher K-Resonances | We use the new symmetries in the heavy quark limit to calculate the exclusive
B-decays $B \rightarrow K^i \psi $ where $K^i$ are higher resonances of
K-meson. We then estimate the long distance contributions to $B \rightarrow K^i
\gamma $ decays via $\psi - \gamma$ conversion. The results point to around $30
\%$ uncert... | 1993-02-03 | 2007-05-23 | [
"hep-ph"
] | Mohammad R. Ahmady, Dongsheng Liu and Zhijian Tao |
hep-ph/9302207 | Spontaneous CP Violation in the Minimal Supersymmetric Standard Model at
Finite Temperature | We show that in the Minimal Supersymmetric Standard Model one--loop effects
at finite temperature may lead to a spontaneous breaking of CP invariance in
the scalar sector. Requiring that the breaking takes place at the critical
temperature for the electroweak phase transition, we find that the parameters
space is compa... | 1993-02-03 | 2010-11-01 | [
"hep-ph"
] | D. Comelli and M. Pietroni |
hep-ph/9302208 | The three-loop QCD $\beta$-function and anomalous dimensions | The analytic calculation of the three-loop QCD $\beta$-function and anomalous
dimensions within the minimal subtraction scheme in an arbitrary covariant
guage is presented. The result for the $\beta$-function coincides with the
previous calculation \cite{tvz}. | 1993-02-03 | 2011-05-05 | [
"hep-ph"
] | S.A. Larin and J.A.M. Vermaseren |
hep-ph/9302212 | Cosmological Consequences of Spontaneous Lepton Number Violation in
$SO(10)$ Grand Unification, EFI-93-07 | Cosmological constraints on grand unified theories with spontaneous lepton
number violation are analysed. We concentrate on $SO(10)$, the simplest of the
models possessing this property. It has been noted previously that the
consistency of these models with the observed baryon asymmetry generically
implies strict upper... | 1993-02-03 | 2009-10-22 | [
"hep-ph"
] | Tony Gherghetta and Gerard Jungman |
hep-ph/9302214 | E2/M1 Mixing Ratio of $\Delta\to N\gamma$ and Hyperon Resonance
Radiative Decay | We compute the leading contribution to the E2/M1 mixing ratio of the decay
$\Delta\rightarrow N\gamma$ in heavy baryon chiral perturbation theory. We find
the mixing ratio to be $4\% \ltap |\delta_{\rm E2/M1}| \ltap 11\%$, much larger
than estimates based on the quark model and other hadronic models. We also
compute th... | 1993-02-03 | 2009-10-22 | [
"hep-ph",
"nucl-th"
] | M.N. Butler, M.J. Savage, and R.P. Springer |
hep-ph/9302213 | Neutrino Energy Loss from the Plasma Process at all Temperatures and
Densities | We present a unified approach which is accurate at all temperatures and
densities for calculating the energy loss from a stellar plasma due to the
plasma process, the decay of photons and plasmons into neutrino pairs. To allow
efficient numerical calculations, an analytic approximation to the dispersion
equations for p... | 1993-02-03 | 2009-12-30 | [
"hep-ph"
] | Eric Braaten and Daniel Segel |
hep-ph/9302210 | Progress in Electroweak Baryogenesis | Recent work on generating the excess of matter over antimatter in the early
universe during the electroweak phase transition is reviewed. | 1993-02-03 | 2009-10-22 | [
"hep-ph"
] | A. G. Cohen, D. B. Kaplan, A. E. Nelson |
hep-ph/9302204 | Physics at B-Factories | The main motivation for B factories is the investigation of CP violation. We
consider two questions: 1) Why has there been essentially no experimental
progress in CP violation in the 28 years since its discovery in 1964? 2) Why do
we expect better results from B factories? | 1993-02-02 | 2007-05-23 | [
"hep-ph"
] | Harry. J. Lipkin |
hep-ph/9302205 | The Electroweak Phase Transition in Minimal Supergravity Models | We have explored the electroweak phase transition in minimal supergravity
models by extending previous analysis of the one-loop Higgs potential to
include finite temperature effects. Minimal supergravity is characterized by
two higgs doublets at the electroweak scale, gauge coupling unification, and
universal soft-SUSY... | 1993-02-02 | 2011-04-20 | [
"hep-ph"
] | D. V. Nanopoulos and H. Pois |
hep-ph/9302203 | Photon-Photon Scattering, Pion Polarizability and Chiral Symmetry | Recent attempts to detect the pion polarizability via analysis of
$\gamma\gamma\rightarrow\pi\pi$ measurements are examined. The connection
between calculations based on dispersion relations and on chiral perturbation
theory is established by matching the low energy chiral amplitude with that
given by a full dispersive... | 1993-02-02 | 2011-07-19 | [
"hep-ph",
"nucl-th"
] | John F. Donoghue and Barry R. Holstein |
hep-ph/9302202 | Supersymmetric Higgs Bosons at the Limit | We obtain an improved upper bound on the lightest neutral CP-even Higgs boson
mass from a low energy renormalisation-group analysis of the Higgs sector of
the next-to-minimal supersymmetric standard model. We find $m_h< 145$ GeV for
$m_t=90$ GeV, decreasing to $m_h< 123$ GeV for $m_t=180$ GeV. We also discuss
the light... | 1993-02-02 | 2009-10-22 | [
"hep-ph"
] | T.Elliott, S.F.King and P.L.White |
hep-ph/9301296 | Probes of parton transversity | An inventory is made of the experiments which can measure the transversely
polarized quark distributions and fragmentation functions at leading twist.
(Contribution to the 10th International Symposium on High Energy Spin Physics,
Nagoya, Japan, Nov. 9-14, 1992) | 1993-02-01 | 2008-02-03 | [
"hep-ph"
] | X. Artru |
hep-ph/9301295 | Chiral Dynamics and Heavy-Fermion Formalism in Nuclei: I. Exchange Axial
Currents | Chiral perturbation theory in heavy-fermion formalism is developed for
meson-exchange currents in nuclei and applied to nuclear axial- charge
transitions. Calculation is performed to the next-to-leading order in chiral
expansion which involves graphs up to one loop. The result turns out to be very
simple. The previousl... | 1993-02-01 | 2010-04-06 | [
"hep-ph",
"nucl-th"
] | Tae-Sun Park, Dong-Pil Min and Mannque Rho |
hep-ph/9302201 | Neutrinoless double beta decay in an $SU(3)_L\otimes U(1)_N$ model | We consider a model for the electroweak interactions with $SU(3)_L\otimes
U(1)_N$ gauge symmetry. We show that, it is the conservation of $F=L+B$ which
forbids massive neutrinos and the neutrinoless double beta decay,
$(\beta\beta)_{0\nu}$. Explicit and spontaneous breaking of $F$ imply that the
neutrinos have an arbit... | 1993-02-01 | 2009-10-22 | [
"hep-ph"
] | V. Pleitez and M.D. Tonasse |
hep-ph/9301294 | A More-Effective Potential | In theories with spontaneous symmetry breaking, the loop expansion of the
effective potential is awkward. In such theories, the exact effective potential
$V(\phi_c,T)$ is real and convex (as a function of the classical field
$\phi_c$), but its perturbative series can be complex with a real part that is
concave. These f... | 1993-02-01 | 2009-10-22 | [
"hep-ph"
] | Kevin Cahill |
hep-ph/9301293 | The Electric Dipole Moment of the W and Electron in the Standard Model | I show that the electric dipole moment of the W-boson vanishes to two loop
order in the Standard KM model. As a consequence, the electric dipole moment of
the electron vanishes to three loop order. Including QCD corrections may give a
non-vanishing result; I estimate d_W \approx 8 10^-31 ecm which induces an
electron E... | 1993-01-30 | 2009-09-25 | [
"hep-ph"
] | Michael Booth |
hep-ph/9301292 | Indications for a Detonating Quark-Gluon Plasma | We propose a mechanism which naturally contains the relation $\mu_{B} =
3\mu_{S}$ of the hadronic gas produced in heavy-ion collisions at CERN. Our
starting assumption is the existence of a sharp front separating the
quark-gluon plasma phase from the hadronic phase. Energy-momentum conservation
across the front leads t... | 1993-01-29 | 2010-11-01 | [
"hep-ph"
] | N. Bili\'c, J. Cleymans, E. Suhonen, D.W. von Oertzen |
hep-ph/9301290 | Leptonic Flavor-changing Z0 Decays in SU(2)xU(1) Theories with Right-
handed Neutrinos | We analyze possible lepton-flavor-violating decays of the $Z^0$ particle in a
minimal extension of the Standard Model, in which one right-handed neutral
field for each family has been introduced. Such rare leptonic decays are
induced by Majorana neutrinos at the first electroweak loop level and are
generally not suppre... | 1993-01-28 | 2009-10-22 | [
"hep-ph"
] | J.G. Koerner, A. Pilaftsis, K. Schilcher |
hep-ph/9301289 | Leptonic CP Asymmetries in Flavor-changing H0 Decays | Leptonic flavor-changing $H^0$ decays with branching ratios of the order of
$10^{-5}-10^{-6}$ may constitute an interesting framework when looking for
large $CP$-violating effects. We show that leptonic $CP$~asymmetries of an
intermediate $H^0$ boson can be fairly large in natural scenarios of the
minimal Standard Mode... | 1993-01-28 | 2010-11-01 | [
"hep-ph"
] | J. G. Koerner, A. Pilaftsis, K. Schilcher |
hep-ph/9301291 | Neutrino Masses in Flipped SU(5) | We analyse the fermion masses and mixings in the flipped SU(5) model. The
fermion mass matrices are evolved from the GUT scale down to $m_W$ by solving
the renormalization group equations for the Yukawa couplings. The constraints
imposed by the charged fermion data are then utilised to make predictions about
the neutri... | 1993-01-28 | 2010-11-01 | [
"hep-ph"
] | G.K. Leontaris, and J.D. Vergados |
hep-ph/9301285 | The electroweak phase transition with a singlet | We study the electroweak phase transition in the minimal extension of the
Standard Model: an extra complex singlet with zero vacuum expectation value.
The first-order phase transition is strengthened by the cubic term triggered in
the one-loop effective potential by the extra boson. Plasma effects are
considered to lea... | 1993-01-27 | 2009-10-22 | [
"hep-ph"
] | J.R. Espinosa and M. Quir\'os |
hep-ph/9301282 | Interference Effects in B-Decays to Flavor-Mixed Neutral Mesons - Clues
to Small Amplitudes and CP-Violation | CP violation can be observed in B decays when a given process depends upon
interference between two weak amplitudes which have different $CP$-violating
phases. Since most weak decay diagrams have quark lines where each has a
definite flavor label, neutral mesons which are flavor mixtures are
particularly interesting. D... | 1993-01-27 | 2007-05-23 | [
"hep-ph"
] | Harry. J. Lipkin |
hep-ph/9301286 | Restrictions on B-L Symmetry Breaking Implied by a Fourth Generation
Neutrino | Several misprints in the earlier version (hep-ph/9301286) have been
corrected. | 1993-01-27 | 2009-10-22 | [
"hep-ph"
] | R.N. Mohapatra and X. Zhang |
hep-ph/9301288 | $WZ$, $W\gamma$, $WW$ and $ZZ$ pair productions at TeV $e\gamma$
colliders | We calculate the gauge-boson pairs $W^-Z$, $W^-\gamma$, $W^+W^-$, $ZZ$
productions in the $e^- \gamma$ collisions, where the photon beam is realized
by the laser back-scattering method. These processes are important tests for
the non-abelian gauge sector of the standard model (SM). Precise calculations
of these process... | 1993-01-27 | 2009-10-22 | [
"hep-ph"
] | Kingman Cheung |
hep-ph/9301283 | Dominant Three-Body Decays of a Heavy Higgs and Top Quark | We calculate the dominant three body Higgs decays, $H \to W^+W^-(Z^0,
\gamma)$ and $H \to t\overline{t}(Z^0,\gamma ,g)$, in the Standard Model. We
find that the branching ratios of these decays are of the order of few percent
for large Higgs masses. We comment on the behaviour of the partial decay width
$\Gamma (H \to ... | 1993-01-27 | 2009-10-22 | [
"hep-ph"
] | R. Decker, M. Nowakowski and A. Pilaftsis |
hep-ph/9301284 | Pair creation in transport equations using the equal-time Wigner
function | Based on the equal-time Wigner function for the Klein-Gordon field, we
discuss analytically the mechanism of pair creation in a classical
electromagnetic field including back-reaction. It is shown that the equations
of motion for the Wigner function can be reduced to a variable-frequency
oscillator. The pair-creation r... | 1993-01-27 | 2016-09-01 | [
"hep-ph"
] | C. Best and J. M. Eisenberg |
hep-ph/9301287 | Family Symmetry, Fermion Mass Matrices and Cosmic Texture | The observed replication of fermions in three families is undoubtedly a
reflection of a deeper symmetry underlying the standard model. In this paper we
investigate one very elementary possibility, that physics above the grand
unification scale is described by the symmetry group $G\timesSU(3)_{fam}$ with
$G$ a gauged gr... | 1993-01-27 | 2009-10-22 | [
"hep-ph"
] | Michael Joyce and Neil Turok |
hep-ph/9301281 | The Chiral Approach to the Electroweak Interactions | The effective lagrangian approach is reviewed and applied to the case of
electroweak interactions. | 1993-01-27 | 2011-04-15 | [
"hep-ph"
] | Ferruccio Feruglio |
hep-ph/9301279 | Nonleptonic Decays of Charmed Mesons into two Pseudoscalar Mesons | We investigate the nonleptonic decay of charmed meson into two pseudoscalar
mesons using the vector--dominance model, and compare the results with those
obtained from the factorization model. In particular, we discuss the role of
the annihilation diagrams in the two models. | 1993-01-26 | 2015-06-25 | [
"hep-ph"
] | Ashok Das and Vishnu Mathur |
hep-ph/9301278 | The Rare Decay $B\to K^{\ast}\gamma$: A More Precise Calculation | Efforts to predict the rare exclusive decay $B\to K^{\ast}\gamma$ from the
well known inclusive decay $b\to s\gamma$ are frustrated by the effect of the
large recoil momentum. We show how to reduce the large uncertainty in
calculating this decay by relating $B\to K^{\ast}\gamma$ to the semileptonic
process $B\to\rho e\... | 1993-01-26 | 2009-10-22 | [
"hep-ph"
] | Patrick J. O'Donnell and Humphrey K.K. Tung |
hep-ph/9301274 | QCD Sum Rules and Compton Scattering | We extend QCD sum rule analysis to moderate energy fixed angle Compton
scattering. In this kinematic region there is a strong similarity to the sum
rule treatment of electromagnetic form factors, although the four-point
amplitude requires a modification of the Borel transform. To illustrate our
method, we derive the su... | 1993-01-26 | 2014-11-17 | [
"hep-ph"
] | Claudio Coriano', Anatoly Radyushkin and George Sterman |
hep-ph/9301273 | CP-odd Neutral Higgs Effects in Top -- anti-Top Production | We study $CP$ violation in the process $e^+e^- \to t\bar{t} \nu\bar{\nu}$ at
an $e^+e^-$-TeV collider. As the source of $CP$ violation we assume a two-Higgs
doublet model with an explicitly $CP$-noninvariant Higgs potential. Sizeable
$CP$-odd observables originating from the subprocess reaction, $W^+W^- \to
t\bar{t}$, ... | 1993-01-26 | 2010-11-01 | [
"hep-ph"
] | A. Pilaftsis and M. Nowakowski |
hep-ph/9301272 | CP-Violation with Bosons | We formulate the conditions under which a purely bosonic theory (without
fermions) containing neutral spin-0 particles and vector (gauge) bosons
violates the CP-symmetry through the presence of CP-even and CP-odd operators
in the Lagrangian. This is done without reference to explicitly CP-violating
scalar sector of ext... | 1993-01-26 | 2010-11-01 | [
"hep-ph"
] | G. Cvetic, M. Nowakowski and A. Pilaftsis |
hep-ph/9301277 | Operator Analysis for the Higgs Potential and Cosmological Bound on the
Higgs-Boson Mass | Using effective lagrangian, we examine the impacts of new physics on the
electroweak baryogenesis. By analysing the high dimensional operators relevent
to the Higgs potential we point out that the Higgs mass bound required by
electroweak baryogenesis can be relaxed to the region allowed by experiments,
provided that ne... | 1993-01-26 | 2009-10-22 | [
"hep-ph"
] | X. Zhang |
hep-ph/9301275 | The phase-space structure of the Klein-Gordon field | The formalism based on the equal-time Wigner function of the two-point
correlation function for a quantized Klein--Gordon field is presented. The
notion of the gauge-invariant Wigner transform is introduced and equations for
the corresponding phase-space calculus are formulated. The equations of motion
governing the Wi... | 1993-01-26 | 2009-10-22 | [
"hep-ph"
] | C. Best, P. Gornicki, and W. Greiner |
hep-ph/9301270 | Application of M\"ossbauer-Type Sum Rules for $B$ Meson Decays | Sum rules originally derived for the M\"ossbauer Effect are applied to weak
semileptonic B decays. The sum rules follow from assuming that the decay by
electroweak boson emission of an unstable nucleus or heavy quark in a bound
system is described by a pointlike coupling to a current which acts only on the
decaying obj... | 1993-01-26 | 2009-10-22 | [
"hep-ph"
] | Harry J. Lipkin |
hep-ph/9301269 | Soft Modes Contribution into Path Integral | A method for nonperturbative path integral calculation is proposed.
Quantum mechanics as a simplest example of a quantum field theory is
considered. All modes are decomposed into hard (with frequencies $\omega^2
>\omega^2_0$) and soft (with frequencies $\omega^2 <\omega^2_0$) ones,
$\omega_0$ is a some parameter. Har... | 1993-01-26 | 2014-11-17 | [
"hep-ph"
] | V.M.Belyaev |
hep-ph/9301271 | The Large N Limit and the High Temperature Phase Transition for the
\phi^4 Theory | We study, with various methods (standard large N evaluation of the functional
integral for the effective potential, solution of the Schwinger-Dyson
equations), the high temperature phase transition for the $N$-component
$\phi^4$ theory in the large $N$ limit. Our results fully confirm a previous
investigation of the pr... | 1993-01-26 | 2009-10-22 | [
"hep-ph"
] | M. Reuter, N. Tetradis and C. Wetterich |
hep-ph/9301280 | Breaking Of Conformal Invariance And Electromagnetic Field Generation In
The Universe | It is shown that the breaking of the conformal invariance in quantum
electrodynamics due to the trace anomaly results in the generation of long wave
electromagnetic fields during inflationary stage of the universe evolution. If
the coefficient of the logarithmic charge renormalization is large (due to a
large number of... | 1993-01-26 | 2008-11-26 | [
"hep-ph"
] | A. Dolgov Randall (Physics Laboratory University of Michigan, Ann
Arbor, MI U.S.A. and ITEP, Moscow, Russia) |
hep-ph/9301276 | A global fit of $\pi\pi$ and $\pi K$ elastic scattering in ChPT with
dispersion relations | We apply the one-loop results of the $SU(3)_L\times SU(3)_R$ ChPT suplemented
with the inverse amplitude method to fit the available experimental data on
$\pi\pi$ and $\pi K$ scattering. With esentially only three parameters we
describe accurately data corresponding to six different channels, namely
$(I,J)=(0,0), (2,0)... | 1993-01-26 | 2009-10-22 | [
"hep-ph"
] | A. Dobado and J. R. Pelaez |
hep-ph/9301266 | Fermion Density Induced Instability of the W-Boson Pair Condensate in
Strong Magnetic Field | The electroweak vacuum structure in an external magnetic field close to the
lower critical value is considered at finite fermion density. It is shown that
the leading effect of the fermions is to reduce the symmetry of the W-pair
condensate in the direction of the magnetic field. The energy is minimized by
the appearan... | 1993-01-25 | 2009-10-22 | [
"hep-ph"
] | Erich R. Poppitz |
hep-ph/9301267 | Implications for Minimal Supersymmetry from Grand Unification and the
Neutralino Relic Abundance | We examine various predictions of the minimal supersymmetric standard model
coupled to minimal supergravity. The model is characterised by a small set of
parameters at the unification scale. The supersymmetric particle spectrum at
low energy and the spontaneous breaking of the standard model itself are then
generated r... | 1993-01-25 | 2009-10-22 | [
"hep-ph"
] | R.G. Roberts and L. Roszkowski |
hep-ph/9301265 | CP Violation in the Decay of Neutral Higgs Boson into $t-{\bar t}$ or
$W^+-W^-$ | We investigate a potentially large CP violating asymmetry in the neutral
Higgs boson decay into a heavy quark pair or a $W^+$--$W^-$ pair. The source of
the CP nonconservation is in the Yukawa couplings of the Higgs boson which can
contain both scalar and pseudoscalar pieces. One of the interesting consequence
is the d... | 1993-01-25 | 2009-09-01 | [
"hep-ph"
] | D. Chang and W.-Y. Keung |
hep-ph/9301268 | Gauge Coupling Unification in Superstring Derived Standard--like Models | I discuss gauge coupling unification in a class of superstring standard--like
models, which are derived in the free fermionic formulation. Recent
calculations indicate that the superstring unification scale is at
$O(10^{18}GeV)$ while the minimal supersymmetric standard model is consistent
with LEP data if the unificat... | 1993-01-25 | 2009-10-22 | [
"hep-ph",
"hep-th"
] | Alon E. Faraggi |
hep-ph/9301261 | Cabibbo Mixing in Superstring Derived Standard--like Models | We examine the problem of generation mixing in realistic superstring derived
standard--like models, constructed in the free fermionic formulation. We study
the possible sources of family mixing in these models . In a specific model we
estimate the Cabibbo angle. We argue that a Cabibbo angle of the correct order
of mag... | 1993-01-22 | 2009-10-22 | [
"hep-ph",
"hep-th"
] | Alon E. Faraggi and Edi Halyo |
hep-ph/9301259 | CP Violation in top pair production at an e^+e^- collider | We investigate possible CP violating effects in $e^+e^-$ annihilation into
top quark pairs. One of the interesting observable effects is the difference in
production rates between the two CP conjugate polarized states $t_L\bar t_L$
and $t_R\bar t_R$. The result is an asymmetry in the energy spectra of the
lepton and th... | 1993-01-22 | 2009-09-01 | [
"hep-ph"
] | Darwin Chang, Wai-Yee Keung, and Ivan Phillips |
hep-ph/9301260 | Gravitational Laser Back-Scattering | A possible way of producing gravitons in the laboratory is investigated. We
evaluate the cross section electron + photon $\rightarrow$ electron + graviton
in the framework of linearized gravitation, and analyse this reaction
considering the photon coming either from a laser beam or from a Compton
back-scattering proces... | 1993-01-22 | 2009-10-22 | [
"hep-ph"
] | S. F. Novaes and D. Spehler |
hep-ph/9301264 | Rare K-Decays as Crucial Tests for Unified Models with Gauged Baryon
Number: | In the grand-unified models based on SU(15) and SU(16) in which the quarks
and leptons are un-unified at the intermediate stages, we show that ${\rm BR}\;
(K_L \to \mu e) \leq 10^{-14}$ and ${\rm BR}\; (K^+ \to \pi^+\mu e) \leq
10^{-14}$ despite the presence of leptoquark gauge bosons. Thus, the
observation of these pr... | 1993-01-22 | 2009-10-22 | [
"hep-ph"
] | Palash B. Pal |
hep-ph/9301263 | High-Energy Cosmic-Ray Muons Under Thick Layers of Matter I. a Method to
Solve the Transport Equation | An effective analytical method for calculating energy spectra of cosmic-ray
muons at large depths of homogeneous media is developed. The method allows to
include an arbitrary (decreasing) muon spectrum at the medium boundary and the
energy dependence of both discrete (radiative and photonuclear) and continuous
(ionizat... | 1993-01-22 | 2007-05-23 | [
"hep-ph"
] | V. A. Naumov, S. I. Sinegovsky, and E. V. Bugaev |
hep-ph/9301262 | Nuclear Gluon Distributions in a Parton Model | Gluon distributions in the carbon and tin nuclei are investigated by using a
$Q^2$ rescaling model with parton recombination effects. We obtain strong
shadowings in the small $x$ region due to the recombinations. The ratio
$G_A(x)/G_N(x)$ in the medium $x$ region is typically 0.9 for medium size
nuclei. At large $x$, t... | 1993-01-22 | 2009-10-22 | [
"hep-ph",
"nucl-th"
] | S. Kumano (Indiana U., present address: U. of Mainz) |
hep-ph/9301256 | Chiral Dynamics and Fermion Mass Generation in Three Dimensional Gauge
Theory | We examine the possibility of fermion mass generation in 2+1- dimensional
gauge theory from the current algebra point of view.In our approach the
critical behavior is governed by the fluctuations of pions which are the
Goldstone bosons for chiral symmetry breaking. Our analysis supports the
existence of an upper critic... | 1993-01-21 | 2009-10-22 | [
"hep-ph",
"hep-th"
] | M.C.Diamantini G.W.Semenoff P.Sodano |
hep-ph/9301258 | Third Generation Effects on Fermion Mass Predictions in Supersymmetric
Grand Unified Theories | Relations among fermion masses and mixing angles at the scale of grand
unification are modified at lower energies by renormalization group running
induced by gauge and Yukawa couplings. In supersymmetric theories, the $b$
quark and $\tau$ lepton Yukawa couplings, as well as the $t$ quark coupling,
may cause significant... | 1993-01-21 | 2009-10-22 | [
"hep-ph"
] | Stephen G. Naculich |
hep-ph/9301254 | Next to leading order determination of pion fragmentation functions | We perform a complete next to leading order evaluation of inclusive neutral
pion production from hadronic colliders which is based on the knowledge of the
pion fragmentation functions at next to leading order. This problem has been
tackled for the first time using different approaches. Predictions at LHC are
given with... | 1993-01-21 | 2008-11-26 | [
"hep-ph"
] | P.Chiappetta, M.Greco, J.Ph.Guillet, S.Rolli, M.Werlen |
hep-ph/9301255 | Calculation of processes involving many particles at the kinematical
threshold | A diagrammatic technique is derived for calculating processes involving the
production of large numbers of particles. As an example, the amplitude of three
particles scattering into $n$ particles at the kinematical threshold in
$\lambda\phi^4$ theory is calculated. From the $3 \to n$ amplitude, it is seen
that the one-... | 1993-01-21 | 2007-05-23 | [
"hep-ph"
] | Brian Hendee Smith |
hep-ph/9301257 | Delta-Isobar Magnetic Form Factor in QCD | We consider the QCD sum rules approach for Delta-isobar magnetic form factor
in the infra-red region $0<Q^2<1GeV^2$. The QCD sum rules in external variable
field are used. The obtained formfactor is in agreement with quark model
predictions for the Delta-isobar magnetic moment. | 1993-01-21 | 2007-05-23 | [
"hep-ph"
] | V.M.Belyaev |
hep-ph/9301253 | Scalar Mesons in $\phi$ Radiative Decay: their implications for
spectroscopy and for studies of CP-violation at $\phi$ factories | Existing predictions for the branching ratio for $\phi\rightarrow
K\bar{K}\gamma$ {\it via} $\phi\rightarrow S\gamma$ (where $S$ denotes one of
the scalar mesons $f_0$(975) and $a_0$(980)) vary by several orders of
magnitude. Given the importance of these processes for both hadron spectroscopy
and CP-violation studies ... | 1993-01-21 | 2008-11-26 | [
"hep-ph",
"nucl-th"
] | F. E. Close (Rutherford), Nathan Isgur (CEBAF), and S. Kumano (Indiana
--> Mainz) |
hep-ph/9301252 | Detection of the heavy Higgs boson at $\gamma\gamma$ colliders | We consider the possibility of detecting a heavy Higgs boson ($m_H>2m_Z$) in
proposed $\gamma\gamma$ colliders through the semi-leptonic mode $\gamma\gamma
\rightarrow H \rightarrow ZZ \rightarrow q\bar q \ell^+\ell^-$. We show that
due to the non-monochromatic nature of the photon beams produced by the
laser-backscatt... | 1993-01-20 | 2009-10-22 | [
"hep-ph"
] | David Bowser-Chao and Kingman Cheung |
hep-ph/9301251 | The $\eta_6$ at LEP and TRISTAN | The $\eta_6$ is a ``heavy axion'' remnant of dynamical electroweak symmetry
breaking by a color sextet quark condensate. Electroweak scale color instanton
interactions allow it to be both very massive and yet be responsible for Strong
CP conservation in the color triplet quark sector. It may have been seen at LEP
via i... | 1993-01-20 | 2014-11-17 | [
"hep-ph"
] | Alan R. White, Ian G. Knowles and Kyungsik Kang |
hep-ph/9301250 | Casimir forces between beads on strings | We consider a string with uniform energy density and tension and with a
number of pointlike masses attached at fixed interdistances. We evaluate the
effective interaction forces between these masses induced by the quantum
fluctuations of the string. For interdistances large compared to the thickness
of the string and s... | 1993-01-19 | 2009-10-22 | [
"hep-ph",
"hep-lat",
"hep-th"
] | Eric D'Hoker and Pierre Sikivie |
hep-ph/9301249 | Is Upsilon(3S) a pure S-wave? | Assuming the QCD multipole expansion is applicable to hadronic transitions of
Upsilon(3S) into lower level bottomonia, we consider the possibility that
Upsilon(3S) has a D-wave component. This assumption leads to a natural
explanation of the pi-pi spectrum in Upsilon(3S) -> Upsilon(1S) pi-pi.
Consequences of this assum... | 1993-01-19 | 2011-01-27 | [
"hep-ph"
] | Sumantra Chakravarty, Sun Myong Kim and Pyungwon Ko |
hep-ph/9301248 | Fermion Masses in SO(10) | Yukawa coupling constant unification together with the known fermion masses
is used to constrain SO(10) models. We consider the case of one (heavy)
generation, with the tree-level relation $m_b=m_\tau$, calculating the limits
on the intermediate symmetry breaking scales. This analysis extends previous
analyses which ad... | 1993-01-19 | 2007-05-23 | [
"hep-ph"
] | Gerard Jungman |
hep-ph/9301247 | Pontecorvo's Original Oscillations Revisited | We show that a left-handed neutrino $\nu_L$ can oscillate into its $CP$-
conjugated state $\bar{\nu}_R$ with maximal amplitude, in direct analogy with
$K^0-\bar{K}^0$ oscillations. Peculiarities of such oscillations under
different conditions are studied. | 1993-01-18 | 2008-11-26 | [
"hep-ph"
] | E.Kh. Akhmedov, S.T. Petcov and A.Yu. Smirnov |
hep-ph/9301246 | Quark Models and Quark Phenomenology | Overwhelming experimental evidence for quarks as real physical constituents
of hadrons along with the QCD analogs of the Balmer Formula, Bohr Atom and
Schroedinger Equation already existed in 1966. A model of colored quarks
interacting with a one-gluon-exchange potential explained the systematics of
the meson and baryo... | 1993-01-18 | 2007-05-23 | [
"hep-ph"
] | Harry J. Lipkin |
hep-ph/9301245 | Symmetry Remnants: Rationale for Having Two Higgs Doublets | There is a good reason why the standard electroweak SU(2) X U(1) gauge model
may be supplemented by two Higgs scalar doublets. They may be remnants of the
spontaneous breaking of an SU(2) X SU(2) X U(1) gauge symmetry at a much higher
energy scale. In one case, the two-doublet Higgs potential has a custodial
SU(2) symm... | 1993-01-16 | 2009-10-22 | [
"hep-ph"
] | Ernest Ma and Daniel Ng |
hep-ph/9301244 | What $\pi-\pi$ Scattering Tells Us About Chiral Perturbation Theory | We describe a rearrangement of the standard expansion of the symmetry
breaking part of the QCD effective Lagrangian that includes into each order
additional terms which in the standard chiral perturbation theory ($\chi$PT)
are relegated to higher orders. The new expansion represents a systematic and
unambiguous general... | 1993-01-16 | 2009-10-22 | [
"hep-ph"
] | J. Stern, H. Sazdjian and N.H. Fuchs |
hep-ph/9301241 | Study of the Reactions $B \to D^* \pi \pi$ and $B \to D^* \rho \pi$ | We evaluate the non leptonic decays $B \to D^* \pi \pi$ and $B \to D^* \rho
\pi$ in the limit of infinitely heavy quarks, assuming the dominance of
intermediate positive parity charmed resonances. We find that the branching
ratios are of the order $10^(-3)$. | 1993-01-15 | 2009-10-22 | [
"hep-ph"
] | P.Colangelo, F.De Fazio and G.Nardulli |
hep-ph/9301243 | Implications of Solar and Atmospheric Neutrinos | The implications of the deficit of solar neutrinos are discussed. If all of
the experiments are taken literally the relative suppressions render an
astrophysical explanation unlikely. Allowing MSW conversions, the data
simultaneously determine the temperature of the core of the sun to within five
percent. The implicati... | 1993-01-15 | 2007-05-23 | [
"hep-ph"
] | Paul Langacker |
hep-ph/9301240 | Gravity and Domain Wall Problem | It is well known that the spontaneous breaking of discrete symmetries may
lead to conflict with big-bang cosmology. This is due to formation of domain
walls which give unacceptable contribution to the energy density of the
universe. On the other hand it is expected that gravity breaks global
symmetries explicitly. In t... | 1993-01-15 | 2009-12-30 | [
"hep-ph"
] | Balram Rai and Goran Senjanovic |
hep-ph/9301242 | Nonabelian Berry Phases in Baryons | We show how generic nonabelian gauge fields can be induced in baryons when a
hierarchy of fast degrees of freedom is integrated out. We identify them with
nonabelian Berry potentials and discuss their role in transmuting quantum
numbers in bag and soliton models of baryons. The resulting baryonic spectra
for both light... | 1993-01-15 | 2009-10-22 | [
"hep-ph",
"nucl-th"
] | H.K. Lee, M.A. Nowak, Mannque Rho and I. Zahed |
hep-ph/9301238 | W + gamma + jet production as a test of the electromagnetic couplings of
W at LHC and SSC | The reaction $pp \to W \ +\ \gamma\ +\ jet \ +\ X$ is considered at
centre-of-mass energies $\sqrt{s} = 16$ and $40\;\tev$, including anomalous
three-gauge-boson couplings $\kappa$ and $\lambda$. The possibility of
obtaining limits on these quantities by comparison with the standard model is
investigated. The radiation... | 1993-01-14 | 2009-10-22 | [
"hep-ph"
] | F.K. Diakonos, O. Korakianitis, C.G. Papadopoulos, C. Philippides and
W.J. Stirling |
hep-ph/9301239 | Implications of Gallium Solar Neutrino Data for the Resonant Spin-Flavor
Precession Scenario | We consider the implications of the recent results of SAGE and GALLEX
experiments for the solution of the solar neutrino problem in the framework of
the resonant neutrino spin-flavor precession scenario. It is shown that this
scenario is consistent with all the existing solar neutrino data including the
gallium results... | 1993-01-14 | 2008-11-26 | [
"hep-ph",
"astro-ph"
] | E.Kh. Akhmedov, A. Lanza, S.T. Petcov |
hep-ph/9301235 | The Singlet Majoron Model with Hidden Scale Invariance | We investigate an extension of the Singlet Majoron Model in which the
breaking of dilatation symmetry by the mass parameters of the scalar potential
is removed by means of a dilaton field. Starting from the one-loop
renormalization group improved potential, we discuss the ground state of the
theory. The flat direction ... | 1993-01-13 | 2009-10-22 | [
"hep-ph"
] | Antonio Riotto |
hep-ph/9301237 | QCD corrections to the charged Higgs decay of a heavy quark | We present an analytic formula for the $O(\alpha_s)$ corrections to the decay
$t\to H^+b$ for nonzero $m_H$ and $m_b$. The Equivalence Theorem is used to
relate these corrections to those for the process $t\to W^+b$. Contrary to
previously published results we find that the effect of the $b$ quark mass is
negligible fo... | 1993-01-13 | 2009-10-22 | [
"hep-ph"
] | Andrzej Czarnecki and Sacha Davidson |
hep-ph/9301236 | Kinetic Equations for Longwavelength Excitations of the Quark-Gluon
Plasma | We show that longwavelength excitations of the quark-gluon plasma are
described by simple kinetic equations which represent the exact equations of
motion at leading order in $g$. Properties of the so-called ``hard thermal
loops'', i.e. the dominant contributions to amplitudes with soft external
lines, find in this appr... | 1993-01-13 | 2009-10-22 | [
"hep-ph"
] | Jean-Paul BLAIZOT and Edmond IANCU (Service de Physique Th\'eorique
CE-Saclay, 91191 Gif-sur-Yvette, France) |
hep-ph/9301232 | Heavy Charged Leptons in an $SU(3)_L\otimes U(1)_N$ Model | We consider an $SU(3)_L\otimes U(1)_N$ model for the electroweak interactions
which includes extra charged leptons which do not mix with the known leptons.
These new leptons couple to $Z^0$ only through vector currents. We consider
constraints on the mass of one of these leptons coming from the $Z^0$-width and
from the... | 1993-01-12 | 2009-10-22 | [
"hep-ph"
] | V. Pleitez and M.D. Tonasse |
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