Yukawa Unification and Neutralino Dark Matter in SU(4)_c \times SU(2)_L \times SU(2)_R
Preprint
- 30 March 2009
Abstract
We consider a left-right symmetric SU(4)_c \times SU(2)_L \times SU(2)_R (4-2-2) model with gravity mediated supersymmetry breaking. We find that with 4-2-2 compatible non-universal gaugino masses, t-b-\tau Yukawa coupling unification is consistent with neutralino dark matter abundance and with constraints from collider experiments (except (g-2)_{\mu}). The gluino mass lies close to that of the lightest neutralino, so that the gluino co-annihilation channel plays an important role in determining the neutralino relic abundance. By relaxing the Yukawa unification constraint we find stau and stop masses as low as 200-220 GeV. We highlight some benchmark points for these cases with 40 < \tan\beta < 58.Keywords
All Related Versions
- Version 1, 2009-03-30, ArXiv
- Published version: Physical Review D, 79 (11), 115004.
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