Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-01-02
JHEP 0805:052,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
Comments: 43 pages, 14 figures. Version accepted for publication: typos corrected, rewritten for better understanding and refe
Scientific paper
10.1088/1126-6708/2008/05/052
We consider the effects of departures from minimal flavour violations (MFV) in the context of CMSSM-like theories. Second and third generation off-diagonal elements in the Yukawa, sfermion, and trilinear mass matrices are taken to be non-zero at the GUT scale. These are run down together with MSSM parameters to the electroweak scale. We apply constraints from fermion masses and CKM matrix elements to limit the range of the new free parameters of the model. We determine the effect of the departure from MFV on the branching ratio of b->s gamma. We find that only when the expansion parameter in the down-squark sector is relatively large there is a noticeable effect, which tends to relax the lower limit from b->s gamma on the universal gaugino mass. We also find that the expansion parameter associated with the slepton sector needs to be smaller than the corresponding parameter in the down-squark sector in order to be compliant with the bound imposed by the branching ratio of tau-> mu gamma.
Olive Keith A.
Velasco-Sevilla Liliana
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