166 research outputs found
Singly produced new physics particles in future colliders
Single production at hadron and photon colliders of gluinos and sneutrinos of
supersymmetric models, as well as radions of the Randall-Sundrum model, is
discussed. In the case of supersymmetry, R-parity breaking is needed in order
to produce single susy particles. Resonant production of radions is considered
at gamma-gamma collider.Comment: 3 pp. Talk given at SUSY'01, Dubna, Russia, June 11-17, 200
Supersymmetric Gelfand-Dickey Algebra
We study the classical version of supersymmetric -algebras. Using the
second Gelfand-Dickey Hamiltonian structure we work out in detail and
-algebras.Comment: 13 page
ZZH coupling : A probe to the origin of EWSB ?
We argue that the coupling constitutes a simple probe of the nature of
the scalar sector responsible for electroweak symmetry breaking. We demonstrate
the efficacy of this measure through an analysis of four-dimensional models
containing scalars in arbitrary representation of , as well
as extra-dimensional models with a non-factorizable geometry. A possible role
for the couplings is also discussed.Comment: Minor modifications in the text. Version to appear in Nucl. Phys.
g-2 of the muon in SUSY Models with Gauge Multiplets in the Bulk of Extra-Dimensions
We analyze the supersymmetric contributions to the anomalous magnetic moment
of the muon (a_\mu) in the framework of pure and gaugino-assisted anomaly
mediation models, and gaugino mediation models. In the last two models the
gauge multiplets propagate in the higher dimensional bulk, providing a natural
mechanism for solving the problem of negative squared slepton masses present in
the pure anomaly mediation models. In the light of the new BNL results for
a_\mu, we found that the pure and gaugino-assisted anomaly mediation models are
almost excluded by the BNL constraints at 2\sigma level when combined with CLEO
constraints on b->sg at 90 % of C.L. In contrast, the gaugino mediation models
provide extensive regions in the SUSY parameter space where both of these
constraints are satisfied.Comment: 12 pages, 4 figures, added discussion on neutralino-nucleon cross
section, minor change
Relic density in nonuniversal gaugino mass models with SO(10) GUT symmetry
Non-universal boundary conditions in grand unified theories can lead to
nonuniversal gaugino masses at the unification scale. In R-parity preserving
theories the lightest supersymmetric particle is a natural candidate for the
dark matter. The composition of the lightest neutralino and the identity of the
next-to-lightest supersymmetric particle are studied, when nonuniversal gaugino
masses come from representations of SO(10). In these cases, the thermal relic
density compatible with the Wilkinson Microwave Anisotropy Probe observations
is found. Relic densities are compared with the universal case. Mass spectra in
the studied cases are discussed.Comment: 7 pages, 13 figures, revtex4, two-column. V2: Typos corrected and
references adde
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