Neutralino Dark Matter, b-τ Yukawa Unification and Non-Universal Sfermion Masses
نویسنده
چکیده
We study the implications of minimal non-Universal Boundary Conditions in the sfermion Soft SUSY Breaking (SSB) masses of mSUGRA. We impose asymptotic b-τ 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 χ̃− b̃1 and χ̃− τ̃1 − ν̃τ coannihilations significantly contribute to the reduction of the neutralino relic density.
منابع مشابه
Sfermion Mass Non-universality C. Pallis
In the context of a SUSY GUT inspired MSSM version, the low energy consequences of the asymptotic b−τ Yukawa coupling Unification are examined, under the assumption of universal or non-universal boundary conditions for the gaugino and sfermion masses. Gaugino non-universality is modestly applied, so that the SUSY corrections to b-quark mass can be reconciled with the present experimental data o...
متن کاملb − τ U NIFICATION WITH G AUGINO AND S FERMION M ASS NON - U NIVERSALITY
In the context of a SUSY GUT inspired MSSM version, the low energy consequences of the asymptotic b − τ Yukawa coupling Unification are examined, under the assumption of universal or non-universal boundary conditions for the gaugino and sfermion masses. Gaugino non-universality is applied, so that the SUSY corrections to b-quark mass can be reconciled with the present experimental data on muon ...
متن کاملM ar 2 00 9 Yukawa Unification and Neutralino Dark Matter in SU ( 4 ) c × SU ( 2 ) L × SU
We consider a left-right symmetric SU(4)c×SU(2)L×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−τ Yukawa coupling unification is consistent with neutralino dark matter abundance and with constraints from collider experiments (except (g − 2)μ). The gluino mass lies close to that of the lightest neutralino, s...
متن کاملNon-universal gaugino masses and implications on the dark matter and Higgs searches
Non-universal boundary conditions in grand unified theories can lead to non-universal gaugino masses at the unification scale. In R-parity preserving theories the lightest supersymmetric particle is a natural candidate for the dark matter. We have studied the composition of the lightest neutralino in non-universal gaugino mass cases from the SU(5), and implications on the dark matter. In the re...
متن کاملDirect, Indirect and Collider Detection of Neutralino Dark Matter In SUSY Models with Non-universal Higgs Masses
In supersymmetric models with gravity-mediated SUSY breaking, universality of soft SUSY breaking sfermion masses m0 is motivated by the need to suppress unwanted flavor changing processes. The same motivation, however, does not apply to soft breaking Higgs masses, which may in general have independent masses from matter scalars at the GUT scale. We explore phenomenological implications of both ...
متن کامل