Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-05-19
JCAP0309:007,2003
Physics
High Energy Physics
High Energy Physics - Phenomenology
25 page latex file including 18 EPS figures; revised version with references added and cross sections rescaled; figures change
Scientific paper
10.1088/1475-7516/2003/09/007
We evaluate neutralino-nucleon scattering rates in several well-motivated supersymmetric models, and compare against constraints on the neutralino relic density, BF( b\to s\gamma ) as well as the muon anomalous magnetic moment a_\mu . In the mSUGRA model, the indirect constraints favor the hyperbolic branch/focus point (HB/FP) region of parameter space, and in fact this region is just where neutralino-nucleon scattering rates are high enough to be detected in direct dark matter search experiments! In Yukawa unified SUSY SO(10) models with scalar mass non-universality, the relic density of neutralinos is almost always above experimental bounds, while the corresponding direct detection rates are below experimental levels. Conversely, in five dimensional SO(10) models where gauge symmetry breaking is the result of compactification of the extra dimension, and supersymmetry breaking is communicated via gaugino mediation, the relic density is quite low, while direct detection rates can be substantial.
Baer Howard
Balazs Csaba
Belyaev Alexander
O'Farrill Jorge
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