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/9212207 | On the CP-odd Nucleon Potential | The CP-odd nucleon potential for different models of CP violation in the one
meson exchange approximation is studied. It is shown that the main contribution
is due to the $\pi$-meson exchange which leads to a simple one parameter CP-odd
nucleon potential. | 1992-12-02 | 2008-11-26 | [
"hep-ph"
] | V.P. Gudkov, X.-G. He and B. McKellar |
hep-ph/9211337 | Infrared Corrections to the Top Quark Width | We present a nonperturbative analysis of the top quark propagator using the
Schwinger Dyson equation in the ladder approximation including both the
electroweak as well as the infrared QCD effects.
We find that the infrared effects are negligible only for top mass larger
than about 250 GeV. | 1992-12-01 | 2007-05-23 | [
"hep-ph"
] | Pankaj Jain, Douglas W. McKay and Herman J. Munczek |
hep-ph/9211338 | Tightly Bound Composite Higgs | We explain general features of the tightly bound composite Higgs models
proposed in recent years; walking technicolor, strong ETC technicolor, and a
top quark condensate, etc.. These models are all characterized by the large
anomalous dimension due to nontrivial short distance dynamics in the gauged
Nambu-Jona-Lasinio ... | 1992-12-01 | 2007-05-23 | [
"hep-ph"
] | Koichi Yamawaki |
hep-ph/9212205 | An Analysis of the Decay $B \rightarrow D^* X \ell \bar\nu_\ell$ with
Predictions from Heavy Quark and Chiral Symmetry | This paper considers the implications of the heavy quark and chiral
symmetries for the semi-leptonic decay $B \rightarrow D^* X \ell \bar
\nu_\ell$. The general kinematic analysis for decays of the form {\sl
pseudoscalar meson $\rightarrow$ vector meson $+$ pseudoscalar meson $+$ lepton
$+$ anti-lepton} is presented. T... | 1992-12-01 | 2009-10-22 | [
"hep-ph"
] | C. L. Y. Lee (Caltech) |
hep-ph/9211336 | Interpretation of the Color Transparency Experiments | We argue that the experimentally measured color transparency ratio is
directly related to the interacting hadron wave function at small transverse
separation, $b^2<1/Q^2$. We show that the present experimental data is
consistent with pure scaling behavior of the hadron-hadron and lepton-hadron
scattering inside the nuc... | 1992-12-01 | 2007-05-23 | [
"hep-ph"
] | Pankaj Jain and John P. Ralston |
hep-ph/9212202 | Global Constraints of Gauss' Law and the Solution to the Strong CP
Problem | This is a brief review on the work done recently. It is shown that the global
constraints of Gauss' law ensure that the vacuum angle must be quantized in
gauge theories with magnetic monopoles. Our quantization rule is given as
$\theta=0$, or $\theta=2\pi N/n~ (n\neq 0)$ with integer n being the relevant
topological ch... | 1992-12-01 | 2007-05-23 | [
"hep-ph"
] | Huazhong Zhang |
hep-ph/9212206 | Particle production in the central rapidity region | We study pair production from a strong electric field in boost-invariant
coordinates as a simple model for the central rapidity region of a heavy-ion
collision. We derive and solve the renormalized equations for the time
evolution of the mean electric field and current of the produced particles,
when the field is taken... | 1992-12-01 | 2008-11-26 | [
"hep-ph"
] | F. Cooper, J. M. Eisenberg, Y. Kluger, E. Mottola, and B. Svetitsky |
hep-ph/9212201 | QCD Corrections to Higgs Boson Production | We discuss the ${\cal O}(\alpha_s)$
QCD radiative corrections to Higgs boson production in the limit in which the
top quark is much heavier than the Higgs boson. The subleading corrections, of
${\cal O} (\alpha_s M_H^2/M_{\rm top}^2)$, are presented for the decay
$H\rightarrow \gamma\gamma$ and shown to be small. | 1992-12-01 | 2007-05-23 | [
"hep-ph"
] | Sally Dawson |
hep-ph/9212203 | $\epsilon^{\prime}/\epsilon$ at the next-to-leading order in QCD and QED | We present a new calculation of the CP violation parameter
$\epsilon^{\prime}/ \epsilon$. The results reported in this paper have been
obtained by using the $\Delta S=1$ effective Hamiltonian computed at the
next-to-leading order, including QCD and QED penguins. The matrix elements of
the relevant operators have been t... | 1992-12-01 | 2010-11-01 | [
"hep-ph"
] | M. Ciuchini, E. Franco, G. Martinelli and L. Reina |
hep-ph/9212204 | Do Solar Neutrino Experiments Imply New Physics? | None of the 1000 solar models in a full Monte Carlo simulation is consistent
with the results of the chlorine or the Kamiokande experiments. Even if the
solar models are forced artifically to have a \b8 neutrino flux in agreeement
with the Kamiokande experiment, none of the fudged models agrees with the
chlorine observ... | 1992-12-01 | 2009-12-30 | [
"hep-ph",
"astro-ph"
] | John N. Bahcall and H. A. Bethe |
hep-ph/9211332 | Exclusive Decays $B \rightarrow K \psi , B \rightarrow K^* \psi $ using
Heavy Quark Symmetries | We use the new symmetries in the heavy quark limit to calculate the exclusive
B-decays $B \rightarrow K \psi ({\psi}^{\prime})$ and $B \rightarrow K^* \psi
({\psi}^{\prime})$. The estimated decay rates are compared with experimental
values. We also estimate rare $B \rightarrow K^* \gamma $ decay rate, based on
these ex... | 1992-11-30 | 2014-11-17 | [
"hep-ph"
] | Mohammad R. Ahmady and Dongsheng Liu |
hep-ph/9211335 | Supersqueezed States | We derive the supersqueeze operator for the supersymmetric harmonic
oscillator, using Baker-Campbell-Hausdorff relations for the supergroup
OSP(2/2). Combining this with the previously obtained superdisplacement
operator, we derive the supersqueezed states. These are the supersymmetric
generalization of the squeezed st... | 1992-11-30 | 2016-08-14 | [
"hep-ph"
] | V. Alan Kosteleck\'y, Michael Martin Nieto, and D. Rodney Truax |
hep-ph/9211333 | QCD Corrected $1/m_b$ Contributions to $B\bbar$--Mixixng | We calculate the QCD corrected effective Hamiltonian for $B\bbar$--Mixing in
heavy quark effective theory including corrections of the order $\Lambda_{QCD}
/ m_b$. The matrix elements of the subleading operators are estimated using the
vacuum insertion assumption. We show that the major part of the subleading
correctio... | 1992-11-30 | 2009-10-22 | [
"hep-ph"
] | Wolfgang Kilian and Thomas Mannel |
hep-ph/9211331 | Multiple $W_L$ Production from Inelastic $W_L W_L$ Scattering at
$\sqrt{\hat{s}} \gg M_H$ | We explore the inelastic production of multiple longitudinal weak bosons as a
manifestation of a strongly interacting symmetry breaking sector. By analogy
with QCD, final states with large multiplicities are expected to occur not far
above the energy scale of the lowest resonances of the underlying strong
theory. We co... | 1992-11-30 | 2009-10-22 | [
"hep-ph"
] | D.A. Morris, R.D. Peccei and R. Rosenfeld |
hep-ph/9211334 | On the Analytic Structure of the Self-Energy for Massive Gauge Bosons at
Finite Temperature | We show that the one-loop self-energy at finite temperature has a unique
limit as the external momentum $p_\mu\rightarrow 0$ {\it if} the loop involves
propagators with distinct masses. This naturally arises in theories involving
particles with different masses as is demonstrated for a toy model of two
scalars as well ... | 1992-11-30 | 2010-02-16 | [
"hep-ph",
"hep-th"
] | P. Arnold, P. Bedaque, A. Das, and S. Vokos |
hep-ph/9211330 | q\bar q$ Bound States in the Bethe-Salpeter Formalism | We solve the Bethe-Salpeter equation in order to determine the spectrum of
pseudoscalar and vector meson bound states for light as well as heavy quarks.
The fermion propagators are obtained by solving the Schwinger-Dyson equation
consistently with the Bethe-Salpeter equation, a procedure necessary for
demonstrating the... | 1992-11-29 | 2007-05-23 | [
"hep-ph"
] | Pankaj Jain and Herman J. Munczek |
hep-ph/9211328 | A test of the equivalence principle by long-baseline
neutrino-oscillation experiments | We show that a breakdown of the universality of the gravitational couplings
to different neutrino flavors can be tested in long-baseline
neutrino-oscillation experiments. In particular we have analyzed in detail a
proposed experiment at SOUDAN 2 with $\nu_\mu$ beams from the Fermilab Main
Injector. It turns out that we... | 1992-11-28 | 2015-06-25 | [
"hep-ph"
] | Kazuhito Iida, Hisakazu Minakata and Osamu Yasuda |
hep-ph/9211326 | Top Width Effects in Soft Gluon Radiation | Soft gluons radiated in top quark production and decay can interfere in a way
that is sensitive to the top width. We show how the width affects the gluon
distribution in $e^+e^- \rightarrow t {\bar t}$ and discuss prospects for
measuring $\Gamma$ from gluons radiated near $\tt$ threshold. | 1992-11-27 | 2007-05-23 | [
"hep-ph"
] | Lynne H. Orr, Yu.L. Dokshitzer, V.A. Khoze, and W.J. Stirling |
hep-ph/9211323 | Using Gluon Fusion to Probe CP Violation in the Higgs Sector | A technique for directly probing CP violation in the Higgs sector of a
multi-doublet model using gluon-gluon collisions at the SSC is reviewed. | 1992-11-27 | 2007-05-23 | [
"hep-ph"
] | John F. Gunion (Davis Institute for High Energy Physics, Department of
Physics, U.C. Davis, Davis CA) |
hep-ph/9211327 | Response to Brodsky and Lu's Letter "On the Self-Consistency of
Scale-Setting Methods | The claim that the Principle of Minimal Sensitivity is "disfavored" because
it does not satisfy certain "self-consistency requirements" is meaningless, and
shows a basic misunderstanding of the renormalization-scheme-dependence
problem. | 1992-11-27 | 2008-02-03 | [
"hep-ph"
] | P.M. Stevenson |
hep-ph/9211325 | Flipped Heavy Neutrinos from the Solar Neutrino Problem to Baryogenesis | We discuss baryogenesis using the flipped $SU(5)$ model for lepton mass
matrices. We show that the generalized see-saw mechanism in this model can not
only provide MSW neutrino mixing suitable for solving the solar neutrino
problem, and supply a hot dark matter candidate ($\nu_\tau$) with mass
$0(10)eV$ as indicated by... | 1992-11-27 | 2009-09-11 | [
"hep-ph",
"astro-ph"
] | J. Ellis, D.V. Nanopoulos and K. Olive |
hep-ph/9211324 | Searching for the Minimal Supersymmetric Model Higgs Bosons | A brief overview of the prospects for detecting the Higgs bosons of the
Minimal Supersymmetric Model at future colliders is presented. | 1992-11-27 | 2007-05-23 | [
"hep-ph"
] | John F. Gunion (Davis Institute for High Energy Physics, Department of
Physics, U.C. Davis, Davis CA 95616) |
hep-ph/9211321 | Two--Loop Anomalous Dimension Matrix for $\Delta S=1$ Weak Non-Leptonic
Decays II: ${\cal O}(\alpha_e \alpha_s)$ | We calculate the $10\times 10$ two--loop anomalous dimension matrix to order
$\ord(\alpha_e \alpha_s)$ in the dimensional regularization scheme with
anticommuting $\gamma_5$ (NDR) which is necessary for the extension of the
$\Delta S=1$ weak Hamiltonian involving electroweak penguins beyond the leading
logarithmic appr... | 1992-11-26 | 2009-10-22 | [
"hep-ph"
] | Andrzej J. Buras, Matthias Jamin, Markus E. Lautenbacher |
hep-ph/9211319 | Explicit Calculation of the Renormalized Singlet Axial Anomaly | A careful and complete discussion is given of the renormalization of the
singlet axial anomaly equation in a vector-like nonabelian gauge theory such as
QCD regularized by ordinary dimensional regularization. Pseudotensorial
structures are treated with the 't Hooft-Veltman prescription. A general
framework for calculat... | 1992-11-26 | 2009-10-22 | [
"hep-ph",
"hep-th"
] | M. Bos |
hep-ph/9211316 | Heavy Meson Masses and Decay Constants | Masses and decay constants of mesons containing a single $c$ or $b$ quark are
described within the framework of heavy-quark symmetry. The $B_s^* - B_s$ and
$\bar B^{*0} - \bar B^0$ mass splittings are found equal to within a fraction
of an MeV. Decay constants of $D$ and $B$ mesons are estimated using isospin
mass spli... | 1992-11-26 | 2007-05-23 | [
"hep-ph"
] | Jonathan L. Rosner (Enrico Fermi Institute and Department of Physics,
University of Chicago) |
hep-ph/9211322 | Light Gluinos in $Z^0$ Decays? | We point out that an apparent discrepancy between the values of
$\alpha_s(M_z)$ as determined from low versus high energy experiments can be
explained if an electrically neutral coloured fermion exists which slows down
the running of the strong coupling constant $\alpha_s$. | 1992-11-26 | 2009-10-22 | [
"hep-ph"
] | M.Jezabek and J.H.Kuehn |
hep-ph/9211320 | Matter Effects in Atmospheric Neutrino Oscillations | The Kamiokande II and IMB data on contained events induced by atmospheric
neutrinos exhibit too low a ratio of muons to electrons, which has been
interpreted as a possible indication of neutrino oscillations. At the same
time, the recent data on upward--going muons in underground detectors have
shown no evidence for ne... | 1992-11-26 | 2008-11-26 | [
"hep-ph"
] | E. Akhmedov, P. Lipari and M. Lusignoli |
hep-ph/9211318 | Test for Right-Handed $b$ Quark Decays | Gronau and Wakaizumi have proposed a model in which the dominant $b$ decays
are due to exchange of a new right-handed gauge boson. A test of this model via
the study of polarized $\Lambda_b$ baryons produced in $e^+ e^- \to Z \to
\Lambda_b + X$ is suggested. | 1992-11-26 | 2009-10-22 | [
"hep-ph"
] | James F. Amundson, Jonathan L. Rosner, and Mihir Worah (University of
Chicago), and Mark B. Wise (California Institute of Technology) |
hep-ph/9211317 | Model of the Quark Mixing Matrix | The structure of the Cabibbo-Kobayashi-Maskawa (CKM) matrix is analyzed from
the standpoint of a composite model. A model is constructed with three families
of quarks, by taking tensor products of sufficient numbers of spin-1/2
representations and imagining the dominant terms in the mass matrix to arise
from spin-spin ... | 1992-11-26 | 2009-10-22 | [
"hep-ph"
] | Jonathan L. Rosner and Mihir P. Worah (Enrico Fermi Institute and
Department of Physics, University of Chicago) |
hep-ph/9211315 | Hints within the standard model on m_t and m_H | If one or more otherwise divergent quantities in the standard model are
actually finite, they may be indications of underlying dynamics. In particular,
one-loop finiteness of the m_H renormalization is achieved if m_t^2 \simeq
m_H^2 = (2M_W^2 + M_Z^2)/3. | 1992-11-26 | 2007-05-23 | [
"hep-ph"
] | Ernest Ma |
hep-ph/9211311 | Method for Flavor Tagging in Neutral B Meson Decays | A method is proposed for tagging the flavor of neutral $B$ mesons in the
study of CP-violating decay asymmetries. The method makes use of a possible
difference in interactions in $B \pi$ or $B^* \pi$ systems with isospins 1/2
and 3/2, and would be particularly clean if the $I = 1/2$ systems can be
detected as ``$B^{**}... | 1992-11-25 | 2010-11-01 | [
"hep-ph"
] | Michael Gronau (Department of Physics, Technion), Alex Nippe (I.
Physikalisches Institut, RWTH Aachen), and Jonathan L. Rosner (Enrico Fermi
Institute and Department of Physics, University of Chicago) |
hep-ph/9211314 | Vacuum Decay in Theories with Symmetry Breaking by Radiative Corrections | The standard bounce formalism for calculating the decay rate of a metastable
vacuum cannot be applied to theories in which the symmetry breaking is due to
radiative corrections, because in such theories the tree-level action has no
bounce solutions. In this paper I derive a modified formalism to deal with such
cases. A... | 1992-11-25 | 2009-10-22 | [
"hep-ph",
"astro-ph"
] | Erick J. Weinberg |
hep-ph/9211305 | Higher-Order QCD Corrections to Inclusive Particle Production in p
anti-p Collisions | Inclusive single-particle production cross sections have been calculated
including higher-order QCD corrections. Transverse-momentum and rapidity
distributions are presented and the scale dependence is studied. The results
are compared with experimental data from the CERN S(p anti-p)S Collider and the
Fermilab Tevatron... | 1992-11-25 | 2009-10-22 | [
"hep-ph"
] | F.M. Borzumati, B.A. Kniehl, G. Kramer |
hep-ph/9211307 | Cosmological Neutrino Mass Limit Revisited | We consider the equilibration of the 'wrong--helicity' Dirac neutrino states
$\nu_{+}$ and $\overline\nu_{-}$ in the early Universe via weak interactions
and calculate carefully the thermally averaged production rate, taking into
account all the relevant scattering and decay processes. Requiring that the
production rat... | 1992-11-25 | 2008-11-26 | [
"hep-ph"
] | K. Enqvist and H. Uibo |
hep-ph/9211303 | Kinetics of Sub-Critical Bubbles and the Electroweak Transition | We investigate the role of large amplitude sub-critical thermal fluctuations
in the dynamics of first order phase transitions. In particular, we obtain a
kinetic equation for the number density of sub-critical fluctuations of the
broken-symmetric phase within the symmetric phase, modeled as spherical
bubbles, and solve... | 1992-11-25 | 2009-10-22 | [
"hep-ph"
] | Graciela Gelmini and Marcelo Gleiser |
hep-ph/9211306 | QCD results for nucleon Compton scattering | We present QCD results for the exclusive processes $\gamma{\rm
N}\rightarrow\gamma{\rm N}$ ($\rm N=p,\;n$) at large momentum transfer and
compare them to data for the proton. TALK given at DPF meeting, November 10-14,
Fermilab. | 1992-11-25 | 2007-05-23 | [
"hep-ph"
] | A.S. Kronfeld and B. Nizic |
hep-ph/9211310 | SO(10) Grand Unification with a Low-Energy $M_R$ | Contrary to commonly held belief, we show that one can obtain a low value for
$M_R$, the $SU(2)_R$ breaking scale, in grand unification theories based on
$SO(10)$. This possibility emerges in the supersymmetric version of $SO(10)$
with a judicious choice of Higgs content. The unification scale is found to be
consistent... | 1992-11-25 | 2009-10-22 | [
"hep-ph"
] | N.G Deshpande, E. Keith, and T.G. Rizzo |
hep-ph/9211308 | On the Self-Consistency of Scale-Setting Methods | We discuss various self-consistency conditions for scale-setting methods. We
show that the widely used Principle of Minimum Sensitivity (PMS) is disfavored
since it does not satisfy these requirements. | 1992-11-25 | 2007-05-23 | [
"hep-ph"
] | Stanley J. Brodsky and Hung Jung Lu |
hep-ph/9211309 | Dynamical supersymmetry breaking with a large internal dimension | Supersymmetry breaking in string perturbation theory predicts the existence
of a new dimension at the TeV scale. The simplest realization of the minimal
supersymmetric Standard Model in the context of this mechanism has two
important consequences: (i) A natural solution to the $\mu$-problem; (ii) The
absence of quadrat... | 1992-11-25 | 2009-10-22 | [
"hep-ph",
"hep-th"
] | I. Antoniadis, C. Mu\~noz and M. Quir\'os |
hep-ph/9211304 | The Two-Loop Anomalous Dimension Matrix for $\Delta S=1$ Weak
Non-Leptonic Decays I: ${\cal O}(\alpha_s^2)$ | We calculate the two-loop $10 \times 10$ anomalous dimension matrix ${\cal
O}(\alpha_s^{2})$ involving current-current operators, QCD penguin operators,
and electroweak penguin operators especially relevant for $\Delta S=1$ weak
non-leptonic decays, but also important for $\Delta B=1$ decays. The
calculation is perform... | 1992-11-25 | 2009-10-22 | [
"hep-ph"
] | Andrzej J. Buras, Matthias Jamin, Markus E. Lautenbacher, Peter H.
Weisz |
hep-ph/9211312 | Electroweak Measurements and Top Quark Mass Limits | The agreement of electroweak measurements with theory places limits on the
masses of the top quark and the $W$ boson. It is shown how these limits arise
and what constraints various measurements (particularly a top quark mass
determination) would provide on the theory. The degree to which present and
future measurement... | 1992-11-25 | 2007-05-23 | [
"hep-ph"
] | Jonathan L. Rosner |
hep-ph/9211313 | Quarkonium and Power Law Potentials | The spectra and decay rates of $c \bar c$ and $b \bar b$ levels are well
described, for the most part, by a power-law potential of the form
$V(r)=\lambda(r^{\alpha}-1)/\alpha+{\rm const.}$, where $\alpha\simeq 0$. The
results of an up-to-date fit to the data on spin-averaged levels are presented.
Results on electric di... | 1992-11-25 | 2007-05-23 | [
"hep-ph"
] | Aaron K. Grant and Jonathan L. Rosner (Enrico Fermi Institute and
Department of Physics, University of Chicago) |
hep-ph/9211301 | Long Range Forces from Two Neutrino Exchange Revisited | The exchange of two massless neutrinos gives rise to a long range force which
couples to weakly charged matter. As has been noted previously in the
literature, the potential for this force is $\VN \propto G_{F}^2 / r^5$ with
monopole-monople, spin-spin and more complicated interactions. Unfortunately,
this is far too s... | 1992-11-24 | 2009-10-22 | [
"hep-ph"
] | S.D.H. Hsu and Pierre Sikivie |
hep-ph/9211302 | Two-loop corrections to the Isgur-Wise function in QCD sum rules | We complete the QCD sum rule analysis of the Isgur Wise form factor
$\xi(v\cdot v')$ at next-to-leading order in renormalization-group improved
perturbation theory. To this end, the exact result for the two-loop corrections
to the perturbative contribution is derived using the heavy quark effective
theory. Several tech... | 1992-11-24 | 2009-10-22 | [
"hep-ph"
] | Matthias Neubert |
hep-ph/9211299 | A New Anomaly Matching Condition? | We formulate ``Witten'' matching conditions for confining gauge theories. The
conditions are analogous to 't Hooft's, but involve Witten's global SU(2)
anomaly. Using a group theoretic result of Geng, Marshak, Zhao and Okubo, we
show that if the fourth homotopy group of the flavor group $H$ is trivial
($\Pi_4(H) = 0$) ... | 1992-11-24 | 2009-10-22 | [
"hep-ph",
"hep-th"
] | Vineer Bhansali and Stephen D.H. Hsu (Lyman Labs. of Physics, Harvard
University, Cambridge, MA 02138) |
hep-ph/9211298 | Conference Summary | Talk presented at the XXVI International Conference on High Energy Physics,
Dallas, Texas, August, 12, 1992. | 1992-11-24 | 2010-11-01 | [
"hep-ph"
] | Steven Weinberg |
hep-ph/9211300 | Chiral Symmetry and Parity--Violating Meson--Nucleon Vertices | In this lecture, I review progress made in the calculations of the
parity-violating meson-nucleon interaction regions. The underlying framework is
the topological chiral soliton model of the nucleon. Emphasis is put on the
computation of theoretically and experimentally accessible nuclear parity
violating observables. ... | 1992-11-24 | 2007-05-23 | [
"hep-ph",
"nucl-th"
] | Ulf-G. Mei{\ss}ner |
hep-ph/9211295 | Nuclear Matter Aspects of Skyrmions | As an alternative approach to the infinite-array description of dense matter
in the Skyrme model, we report about the properties of a single skyrmion on a
compact 3-sphere of finite radius. The density of this matter can be increased
by decreasing the hypersphere radius. As in the array calculations one
encounters a tr... | 1992-11-23 | 2007-05-23 | [
"hep-ph",
"nucl-th"
] | A. Wirzba |
hep-ph/9211296 | Remarks on the Heavy-Quark Symmetry in the Complex Plane | Hadronic systems built from a heavy quark and a cloud of light quarks and
massless gluons posess the Isgur-Wise symmetry resulting in certain relations
between various form factors. These relations can not be valid in the entire
complex plane. We identify contributions which unavoidably violate strongly the
symmetry in... | 1992-11-23 | 2008-11-26 | [
"hep-ph"
] | P. Ball, H.G. Dosch and M.A. Shifman |
hep-ph/9211297 | K and B Physics: a way beyond the Standard Model | I review some aspects of $K$ and $B$ physics both in the context of the
standard model and in some cases in a scenario which is rather different from
the standard model. I discuss, in particular, where we are likely to see
deviations from the standard model in the near future before new colliders are
built. | 1992-11-23 | 2007-05-23 | [
"hep-ph"
] | Patrick J. O'Donnell |
hep-ph/9211329 | Effective Potentials in QCD and Chiral Symmetry Breaking | We consider chiral symmetry breaking through nontrivial vacuum structure with
an explicit construct for the vacuum with quark antiquark condensates in QCD
with Coulomb gauge for different phenomenological potentials. The dimensional
parameter for the condensate function gets related to $<{\bar \psi }\psi>$ of
Shifman, ... | 1992-11-22 | 2014-11-17 | [
"hep-ph"
] | A. Mishra, H. Mishra and S.P. Misra |
hep-ph/9211290 | QCD and Asymptotic Freedom: Perspectives and Prospects | QCD is now a mature theory, and it is possible to begin to view its place in
the conceptual universe of physics with appropriate perspective. There is a
certain irony in the achievements of QCD. For the problems which initially
drove its development only limited insight has been achieved. However I shall
argue that QCD... | 1992-11-20 | 2009-10-22 | [
"hep-ph",
"hep-th"
] | Frank Wilczek |
hep-ph/9211294 | Symmetry Breaking in a Generalized Skyrme Model | We first outline the calculations of the neutron-proton mass difference and
of the axial singlet matrix element (relevant to the "proton spin" puzzle) in a
generalized Skyrme model of pseudoscalars and vectors. These two calculations
are, perhaps surprisingly, linked to each other and furthermore are sensitive
to some ... | 1992-11-20 | 2007-05-23 | [
"hep-ph"
] | J. Schechter |
hep-ph/9211284 | Bound States Can Stabilize Electroweak Strings | We show that the electroweak $Z-$string can be stabilized by the presence of
bound states of a complex scalar field. We argue that fermions coupled to the
scalar field of the string can also make the string stable and discuss the
physical case where the string is coupled to quarks and leptons. This
stabilization mechan... | 1992-11-20 | 2009-10-22 | [
"hep-ph"
] | Tanmay Vachaspati and Richard Watkins |
hep-ph/9211289 | Studying the Top Quark via the W-Gluon Fusion Process | We show that studying the single top quark production via the $W$--gluon
fusion process can provide unique information on: (i) the measurement of the
decay width $\width$; (ii) probing the symmetry breaking mechanism by measuring
the form factor of~\tbW; (iii) testing the Effective--$W$ Approximation prior
to supercoll... | 1992-11-20 | 2009-10-22 | [
"hep-ph"
] | Douglas O. Carlson and C.-P. Yuan |
hep-ph/9211288 | Flavor Changing Neutral Currents in a Realistic Composite Technicolor
Model | We consider the phenomenology of a composite technicolor model proposed
recently by Georgi. Composite technicolor interactions produce four-quark
operators in the low energy theory that contribute to flavor changing neutral
current processes. While we expect operators of this type to be induced at the
compositeness sca... | 1992-11-20 | 2010-11-01 | [
"hep-ph"
] | Christopher D. Carone and Rowan T. Hamilton (Lyman Laboratory of
Physics, Harvard University, Cambridge, MA 02138) |
hep-ph/9211283 | The Chiral Soliton of the Nambu-Jona-Lasinio Model | The baryon number one soliton of the NJL model is investigated. The Euclidian
effective action is regularized using Schwinger's proper time method. Numerical
results for the static soliton energy are presented for the cases without and
with vector and axialvector fields. It is found that the baryon number is
carried by... | 1992-11-20 | 2007-05-23 | [
"hep-ph"
] | R. Alkofer |
hep-ph/9211287 | Quark-Lepton Symmetry | Quark-lepton symmetric models are a class of gauge theories motivated by the
similarities between the quarks and leptons. In these models the gauge group of
the standard model is extended to include a ``color'' group for the leptons.
Consequently, the quarks and leptons can then be related by a $Z_2$ discrete
quark-lep... | 1992-11-20 | 2007-05-23 | [
"hep-ph"
] | R. Foot, H. Lew and R. R. Volkas |
hep-ph/9211292 | Self-Breaking Technicolor | We propose a scenario in which the electroweak symmetry is spontaneously
broken by an $SU(4)$ technicolor gauge interaction which also manages to break
itself completely. The technicolor gauge bosons and technifermions are not
confined by the technicolor force, but get large masses. Starting with a single
technidoublet... | 1992-11-20 | 2009-10-22 | [
"hep-ph"
] | Stephen P. Martin |
hep-ph/9211282 | Disoriented Chiral Condensates: A White Paper for the Full Acceptance
Detector at the SSC | Theoretical speculations and experimental data suggesting the possibility of
observing disoriented chiral condensates at a Full Acceptance Detector are
reviewed. | 1992-11-20 | 2007-05-23 | [
"hep-ph"
] | K. L. Kowalski and C. C. Taylor |
hep-ph/9211281 | Mass of the Lightest Higgs Boson in the Minimal Supersymmetric Standard
Model with an Additional Singlet | An upperbound on the mass of the lightest neutral scalar Higgs boson is
calculated in an extended version of the minimal supersymmetric standard model
that contains an additional Higgs singlet. We integrate the renormalization
group equations of the model, and impose low energy boundary conditions
consistent with prese... | 1992-11-20 | 2007-05-23 | [
"hep-ph"
] | W.T.A. ter Veldhuis |
hep-ph/9211291 | What Do Solar Models Tell Us About Solar Neutrino Experiments? | If the published event rates of the chlorine and Kamiokande solar neutrino
experiments are correct, then the energy spectrum of neutrinos produced by the
decay of $^8$B in the sun must be different from the energy spectrum determined
from laboratory nuclear physics measurements. This change in the energy
spectrum requi... | 1992-11-20 | 2009-10-22 | [
"hep-ph",
"astro-ph"
] | John N. Bahcall |
hep-ph/9211293 | Time Variations of Solar Neutrino Signals and the RSFCN Hypothesis | Resonant spin--flavour conversion of neutrinos (RSFCN) in twisting magnetic
fields might be at the origin of the apparent anticorrelation between the
$^{37}$Ar production--rate in the Homestake solar neutrino detector and the
solar activity. Moreover, it can account for the results of all solar neutrino
experiments rep... | 1992-11-20 | 2010-11-01 | [
"hep-ph"
] | P.I. Krastev |
hep-ph/9211286 | Supersymmetry Tests at Fermilab: A Proposal | We compute the number of trilepton events to be expected at Fermilab as a
result of the reaction $p\bar p\to\chi^\pm_1\chi^0_2X$, where $\chi^\pm_1$ is
the lightest chargino and $\chi^0_2$ is the next-to-lightest neutralino. This
signal is expected to have very little background and is the best prospect for
supersymmet... | 1992-11-20 | 2009-08-25 | [
"hep-ph"
] | J. Lopez, D. Nanopoulos, X. Wang, and A. Zichichi |
hep-ph/9211285 | Chiral Structure of the $b\rightarrow c$ Charged Current and the
Semileptonic $\Lambda_b$ Decay | Using the heavy quark effective theory, chiral structure of the $b\rightarrow
c$ charged current can be determined by the semileptonic $\Lambda_b$ decay with
satisfactory theoretical accuracy. We define an asymmetry which is sensitive to
the chirality of the $b\rightarrow c$ charged current. We show that this
asymmetry... | 1992-11-20 | 2009-10-22 | [
"hep-ph"
] | Minoru Tanaka |
hep-ph/9211279 | Trinification and the Strong P Problem | Models with spontaneously broken parity symmetry can solve the strong $CP$
problem in a natural way. We construct such a model in the context of $\SU3^3$
unification. Parity has the conventional meaning in this model, and the gauge
group is unified. | 1992-11-19 | 2009-10-22 | [
"hep-ph"
] | Eric D. Carlson and Meng Yuan Wang |
hep-ph/9211277 | Will discrete symmetries help solve the hierarchy problem ? | We find that massless Higgs doublets at the GUT scale can be the natural
result of a discrete symmetry. Such a mechanism does not require elaborate fine
tuning or complicated particle content. The same discrete symmetry will also
protect against proton decay and flavor changing neutral currents. However,
this mechanism... | 1992-11-19 | 2007-05-23 | [
"hep-ph"
] | Meng Y. Wang and Eric D. Carlson (Lyman Laboratory of Physics, Harvard
University Cambridge, MA 02138) |
hep-ph/9211276 | CP violation in $J/\psi \rightarrow \Lambda \bar \Lambda$ | We study CP violation in $J/\psi \rightarrow \Lambda \bar{\Lambda}$ decay.
This decay provides a good place to look for CP violation. Some observables are
very sensitive to the $\Lambda$ electric dipole moment $d_\Lambda$ and
therefore can be used to improve the experimental upper bound on $d_\Lambda$.
CP violations in... | 1992-11-19 | 2009-12-30 | [
"hep-ph"
] | Xiao-Gang He, J.P. Ma and B. McKellar |
hep-ph/9211280 | Recent Work on Standard Solar Models | Recent results on standard solar models are reviewed. I shall summarize
briefly three of the themes that I stressed at the Neutrino '92 Conference: 1)
Different solar model codes give the same answers when the same input data are
used; 2) Improved calculations of standard solar models include helium
diffusion, the Live... | 1992-11-19 | 2009-10-22 | [
"hep-ph",
"astro-ph"
] | John N. Bahcall |
hep-ph/9211275 | Proposals for Studying TeV $W_L W_L \rightarrow W_L W_L$ Interactions
Experimentally | We discuss how to experimentally study the symmetry breaking sector by
observing $W_L W_L \rightarrow W_L W_L$ interactions in the TeV region. We
discuss some general features of the event structure in the signal and
background events. Various tricks to enhance the signal--to--background ratio
are also presented. We sh... | 1992-11-19 | 2016-11-03 | [
"hep-ph"
] | C.-P. Yuan |
hep-ph/9211278 | Strangeness in the Skyrme and in Nambu-Jona Lasinio Models | We discuss the phenomenology of SU(3) Skyrme and Nambu--Jona-Lasinio models.
We show that while the Skyrme model, in its simplest version, is unable do
reproduce the hyperon spectrum, the NJL model describes both hyperon and
isospin splittings with satisfactory accuracy. The difference between the two
models lies in ne... | 1992-11-19 | 2008-02-03 | [
"hep-ph"
] | M. Praszalowicz |
hep-ph/9211268 | The QCD Scale in the Heavy Quark Expansion | We argue that consistency of the combined heavy quark and chiral effective
lagrangian requires the QCD scale which multiplies $1/M$ in the heavy quark
expansion to be the chiral symmetry breaking scale, $\Lambda_{CSB}$, rather
than the QCD scale, $\Lambda_{QCD}$. This means that either there is large
uncertainty in the... | 1992-11-18 | 2009-09-15 | [
"hep-ph"
] | Lisa Randall and Eric Sather |
hep-ph/9211269 | See-Saw Type Mixing and $ \nu_{\mu} \to \nu_{\tau} $ Oscillations | We consider $ \nu_{\mu} \to \nu_{\tau} $ oscillations under the assumption
that there is a see-saw type mixing of the light neutrinos with heavy Majorana
particles. It is shown that the existing data, including the recent LEP data,
do not exclude the possibility that the additional terms in the transition
probability d... | 1992-11-18 | 2009-10-22 | [
"hep-ph"
] | S.M. Bilenky and C. Giunti |
hep-ph/9211267 | Heavy Meson Hyperfine Splittings: A Puzzle for Heavy Quark Chiral
Perturbation Theory | We show that there is a large discrepancy between the expected light flavor
dependence of the heavy pseudoscalar--vector mass splittings and the measured
values. We demonstrate that the one--loop calculation is unreliable. Moreover,
agreement with experiment requires the leading dependence on SU(3) symmetry
breaking to... | 1992-11-18 | 2009-09-15 | [
"hep-ph"
] | Lisa Randall and Eric Sather |
hep-ph/9211273 | $b \to s \gamma$ and Minimal Supersymmetry | The contribution to the decay $b\to s \gamma$ in the Minimal Supersymmetric
Standard Model with radiative electroweak breaking is presented. The impact of
a detection of this inclusive decay at the SM level is discussed. Results for
other inclusive $b-s$ transitions are also mentioned. | 1992-11-18 | 2008-02-03 | [
"hep-ph"
] | F. Borzumati |
hep-ph/9211271 | Resolved Virtual Photon Contributions to inelastic $e-p$ Scattering | The problem of dealing with the resolved photon contribution to
$P^2$-integrated $ep$ cross sections is discussed. Suitable approximations have
to be found, since no parametrization of the photon structure function in the
full range of virtuality of the exchanged photon exists. | 1992-11-18 | 2009-10-22 | [
"hep-ph"
] | F. Borzumati |
hep-ph/9211270 | Leading Higgs Mass Dependent Corrections to the Standard Model
Lagrangian and its Two Higgs Doublet Extension | We present an alternative calculation for the leading Higgs mass dependent
one--loop corrections to the standard model Lagrangian, using a background
field technique. Cross--sections computed from our one--loop Lagrangian provide
a check of and reproduce results already obtained in the existing literature
using diagram... | 1992-11-18 | 2007-05-23 | [
"hep-ph"
] | Vidyut Jain |
hep-ph/9211272 | A Probe of New Physics in Top Quark Pair Production at $e^-e^+$
Colliders | We describe how to probe new physics through examination of the form factors
describing the Ztt couplings via the scattering process e^-e^+->t+tbar. We
focus on experimental methods on how the top quark momentum can be determined
and show how this can be applied to select polarized samples of $t\bar{t}$
pairs through t... | 1992-11-18 | 2010-11-01 | [
"hep-ph"
] | G.A. Ladinsky and C.-P. Yuan |
hep-ph/9211259 | Vector mesons in the collective approach to SU(3) | We study the SU(3) extension of the Skyrme model with vector mesons in the
collective quantization scheme. The parameters of the model are fixed in its
mesonic sector. Fields which are excited by the collective rotation of the
classical soliton are determined by a variational method. The resulting
collective Hamiltonia... | 1992-11-17 | 2007-05-23 | [
"hep-ph"
] | H. Weigel |
hep-ph/9211258 | Detection of Intermediate Mass Higgs Bosons from Spontaneously Broken R
Parity Supersymmetry | The Higgs sector in spontaneously broken R Parity supersymmetry (RPSUSY)
shows interesting features that require new search techniques. Both the mass
spectrum and production rates may differ from the standard model and minimal
supersymmetric model (MSSM) expectations. For some parameter choices, the
dominant Higgs boso... | 1992-11-17 | 2009-09-17 | [
"hep-ph"
] | J. C. Rom\~ao, J. L. Diaz-Cruz, F. de Campos and J. W. F. Valle |
hep-ph/9211266 | Soft SUSY Breaking Terms in Stringy Scenarios: Computation and
Phenomenological Viability | We calculate the soft SUSY breaking terms arising from a large class of
string scenarios, namely symmetric orbifold constructions, and study its
phenomenological viability. They exhibit a certain lack of universality, unlike
the usual assumptions of the minimal supersymmetric standard model. Assuming
gaugino condensati... | 1992-11-17 | 2010-04-06 | [
"hep-ph",
"hep-th"
] | B. de Carlos, J.A. Casas and C. Mu\~noz |
hep-ph/9211260 | Implications of $b\rightarrow s\gamma $ decay measurements in testing
the MSSM Higgs sector | The observation that the $b \rightarrow s\gamma $ decay rate is close to the
Standard Model value implies a large mass for the charged-Higgs boson in the
Minimum Supersymmetric Standard Model, that nearly closes the $t \rightarrow b
H^+$ decay channel. For $m_t = 150$ GeV, the parameter region $m_A \ltap 130$
GeV is ex... | 1992-11-17 | 2009-09-15 | [
"hep-ph"
] | V. Barger, M. S. Berger and R. J. N. Phillips |
hep-ph/9211262 | Associated production of Intermediate Higgs or Z-boson with $t \bar t$
pair in $\gamma \gamma$ collision | Photon-photon linear colliders can be realized by laser back-scattering
technique on the next generation linear $e^+e^-$ colliders. Here the associated
productions of an intermediate mass Higgs (IMH) or Z-boson with $t \bar t$ pair
in $\gamma\gamma$ collisions are studied. Since IMH is very unlikely to decay
into $t\ba... | 1992-11-17 | 2009-10-22 | [
"hep-ph"
] | Kingman Cheung |
hep-ph/9211256 | Can $b\to s\gamma$ Close the Supersymmetric Higgs Production Window? | We show that the present limit from CLEO on the inclusive decay $b\to
s\gamma$ provides strong constraints on the parameters of the charged Higgs
sector in two-Higgs-Doublet-Models. Only a slight improvement in the
experimental bound will exclude the region in the Supersymmetric Higgs
parameter space which is inaccessi... | 1992-11-17 | 2010-11-01 | [
"hep-ph"
] | J.L. Hewett |
hep-ph/9211261 | Wilson Renormalization Group Analysis of Theories with Scalars and
Fermions | The continuous block spin (Wilson) renormalization group equation governing
the scale dependence of the action is constructed for theories containing
scalars and fermions. A locally approximated form of this equation detailing
the structure of a generalized effective potential is numerically analyzed. The
role of the i... | 1992-11-17 | 2009-10-22 | [
"hep-ph"
] | T.E. Clark, B. Haeri, S.T. Love |
hep-ph/9211263 | Properties of Low-Lying Heavy-Light Mesons | We present preliminary results for the B meson decay constant and masses of
low-lying heavy-light mesons in the static limit. Calculations were performed
on the lattice in the quenched approximation using multistate smearing
functions generated from a Hamiltonian for a spinless relativistic quark. The
2S--1S and 1P--1S... | 1992-11-17 | 2010-11-19 | [
"hep-ph",
"hep-lat"
] | Anthony Duncan, Estia Eichten, Aida X. El-Khadra, Jonathan M. Flynn,
Brian R. Hill, and Hank Thacker |
hep-ph/9211253 | Rigorous QCD Predictions for Decays of P-Wave Quarkonia | We present a new factorization theorem for the decay rates of P-wave states
of heavy quarkonia. Infrared logarithms that had appeared in previous
perturbative calculations of P-wave decays are absorbed into a quantity that is
related to the amplitude for the heavy quark and antiquark to be in a relative
color-octet S-w... | 1992-11-17 | 2008-02-03 | [
"hep-ph"
] | Geoffrey T. Bodwin, Eric Braaten, G. Peter Lepage |
hep-ph/9211257 | Neutrino production through hadronic cascades in AGN accretion disks | We consider the production of neutrinos in active galactic nuclei (AGN)
through hadronic cascades. The initial, high energy nucleons are accelerated in
a source above the accretion disk around the central black hole. From the
source, the particles diffuse back to the disk and initiate hadronic cascades.
The observable ... | 1992-11-17 | 2009-02-18 | [
"hep-ph",
"astro-ph"
] | L. Nellen, K. Mannheim, P.L. Biermann |
hep-ph/9211249 | Constraints on New Physics from the Higgs and Top Masses | Triviality and vacuum stability bounds on the Higgs and top quark masses in a
rather general class of supersymmetric extensions of the Standard Model are
compared with the corresponding bounds without supersymmetry. Due to generic
differences of those bounds we find that experimental knowledge of the Higgs
and top mass... | 1992-11-16 | 2009-10-22 | [
"hep-ph"
] | U. Ellwanger and M. Lindner |
hep-ph/9211255 | Relativistic Constituent Quark Model for Baryons | The electroweak properties of nucleons and hyperons are calculated in a
relativistic constituent quark model. The baryons are treated as three quark
bound states, and the diagrams of perturbation theory are considered on the
light front. The electroweak properties of the baryons are of nonperturbative
nature and can be... | 1992-11-16 | 2009-09-25 | [
"hep-ph",
"nucl-th"
] | Felix Schlumpf |
hep-ph/9211254 | Relating Physical Observables in QCD without Scale-Scheme Ambiguity | We discuss the St\"uckelberg-Peterman extended renormalization group
equations in perturbative QCD, which express the invariance of physical
observables under renormalization-scale and scheme-parameter transformations.
We introduce a universal coupling function that covers all possible choices of
scale and scheme. Any ... | 1992-11-16 | 2009-09-11 | [
"hep-ph"
] | Hung Jung Lu and Stanley J. Brodsky |
hep-ph/9211251 | Analysis of $\Delta^{+}(1232)$ Isobar Observables, with Improved Quark
Distribution Amplitudes | A model distribution amplitude for the $\Delta^{+}(1232)$ isobar is proposed,
derived on the basis of the QCD sum-rule calculations of Farrar et al. combined
with those of Carlson and Poor. The transition form factor $\gamma p\Delta^{+}$
is calculated modeling the proton by selected distribution amplitudes.
Furthermore... | 1992-11-16 | 2009-10-22 | [
"hep-ph"
] | N. G. Stefanis and M. Bergmann |
hep-ph/9211252 | Exact Results on e+ e- --> e+ e- + 2 Photons at SLC/LEP Energies | We use the spinor methods of the CALKUL collaboration, as realized by Xu,
Zhang and Chang, to calculate the differential cross section for e+ e- --> e+
e- + 2 photons for c.m.s. energies in the SLC/LEP regime. An explicit complete
formula for the respective cross section is obtained. The leading log
approximation is us... | 1992-11-16 | 2009-10-22 | [
"hep-ph"
] | S. Jadach, B.F.L. Ward and S.A. Yost |
hep-ph/9211248 | Effective Lagrangian for Heavy and Light Mesons: Semileptonic Decays | We introduce an effective lagrangian including negative and positive parity
heavy mesons containing a heavy quark, light pseudoscalars, and light vector
resonances, with their allowed interactions, using heavy quark spin-flavour
symmetry, chiral symmetry, and the hidden symmetry approach for light vector
resonances. On... | 1992-11-16 | 2009-10-22 | [
"hep-ph"
] | R. Casalbuoni, A. Deandrea, N. Di Bartolomeo F. Feruglio, R. Gatto and
G. Nardulli |
hep-ph/9211250 | On the Nucleon Distribution Amplitude: The Heterotic Solution | We present a new nucleon distribution amplitude which amalgamates features of
the Chernyak-Ogloblin-Zhitnitsky model with those of the Gari-Stefanis model.
This "heterotic" solution provides the possibility to have asymptotically a
small ratio \hbox{$\vert G_{M}^{n}\vert/G_{M}^{p}\le 0.1$}, while fulfilling
most of the... | 1992-11-16 | 2009-12-30 | [
"hep-ph"
] | N. G. Stefanis and M. Bergmann |
hep-ph/9211247 | Strong and Electromagnetic Decays of the Baryon Decuplet | We discuss the strong and radiative decays of the decuplet of baryon
resonances to the baryon octet in chiral perturbation theory. We comment on the
implications for the polarisability of the nucleon. | 1992-11-14 | 2009-10-22 | [
"hep-ph"
] | Malcolm Butler, Martin Savage and Roxanne Springer |
hep-ph/9211243 | Looking for the gluonic EMC effect in associated $J/\psi$ + $\gamma $
production | We study the associated production of $ J/\psi\ + \gamma $ in fixed-target
experiments with nuclear targets as well as at the relativistic heavy-ion
collider (RHIC). We find that this process affords a very clean probe of
$\rho_g$, the ratio of gluon density in a heavy nucleus to that of a proton.
The combined $x$ rang... | 1992-11-13 | 2011-07-19 | [
"hep-ph"
] | R.V. Gavai, R.M. Godbole and K. Sridhar |
hep-ph/9211242 | Some Properties of Amplitudes at Multi Boson Thresholds in Spontaneously
Broken Scalar Theory | It is shown that in a $\lambda \phi^4$ theory of one real scalar field with
spontaneous breaking of symmetry a calculation of the amplitudes of production
by a virtual field $\phi$ of $n$ on-mass-shell bosons all being exactly at rest
is equivalent in any order of the loop expansion to a Euclidean space
calculation of ... | 1992-11-13 | 2009-10-22 | [
"hep-ph"
] | M.B. Voloshin |
hep-ph/9211245 | Intrinsic Parity of the $(j,0)\oplus(0,j)$ Mesons | Contrary to the usual belief, by carefully examining the operation of parity
transformation on the $(1,0)\oplus(0,1)$ mesons in the generalized canonical
representation, we establish that the $(j,0)\oplus(0,j)$ meson-antimeson pair
have {\it opposite} intrinsic parity. This opens up the possibility that while
the parti... | 1992-11-13 | 2007-05-23 | [
"hep-ph",
"nucl-th"
] | D. V. Ahluwalia |
hep-ph/9211246 | New flavor changing interactions in extended gauge models | A new class of flavor changing (FC) neutral interactions can arise in models
based on extended gauge groups (rank $>$4) when new charged fermions are
present together with new neutral gauge bosons. In some cases the FC couplings
to a new $Z_1$ are expected to be sizeable, implying that the $Z_1$ mass must
be large enou... | 1992-11-13 | 2007-05-23 | [
"hep-ph"
] | Enrico Nardi |
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