Neutralino Dark Matter, b-tau Yukawa Unification and Non-Universal Sfermion Masses

Details Neutralino Dark Matter, b-tau Yukawa Unification and Non-Universal Sfermion Masses Neutralino Dark Matter, b-tau Yukawa Unification and Non-Universal Sfermion Masses

2003-04-07

arxiv.org/abs/hep-ph/0304071v3

Phys.Rev. D68 (2003) 015006

Physics

High Energy Physics

High Energy Physics - Phenomenology

38 pages, 27 Figures, Latex; Version accepted for publication in PRD

Scientific paper

10.1103/PhysRevD.68.015006

We study the implications of minimal non-Universal Boundary Conditions in the sfermion Soft SUSY Breaking (SSB) masses of mSUGRA. We impose asymptotic b-tau Yukawa coupling Unification and we resort to a parameterization of the deviation from Universality in the SSB motivated by the multiplet structure of SU(5) GUT. A set of cosmo-phenomenological constraints, including the recent results from WMAP, determines the allowed parameter space of the models under consideration. We highlight a new coannihilation corridor where neutralino-sbottom and neutralino-tau sneutrino-stau coannihilations significantly contribute to the reduction of the neutralino relic density.

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