Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-04-23
JHEP 1101:131,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
Corresponds to published version
Scientific paper
10.1007/JHEP01(2011)131
The hierarchy of the Yukawa couplings is an outstanding problem of the standard model. We present a class of models in which the first and second generation fermions are SUSY partners of pseudo-Nambu-Goldstone bosons that parameterize a non-compact Kahler manifold, explaining the small values of these fermion masses relative to those of the third generation. We also provide an example of such a model. We find that various regions of the parameter space in this scenario can give the correct dark matter abundance, and that nearly all of these regions evade other phenomenological constraints. We show that for gluino mass ~700 GeV, model points from these regions can be easily distinguished from other mSUGRA points at the LHC with only 7 fb^(-1) of integrated luminosity at 14 TeV. The most striking signatures are a dearth of b- and tau-jets, a great number of multi-lepton events, and either an "inverted" slepton mass hierarchy, narrowed slepton mass hierarchy, or characteristic small-mu spectrum.
Mandal Sourav K.
Nojiri Mihoko
Sudano Matthew
Yanagida Tsutomu T.
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