MSSM phenomenology in the large tanb regime

Abstract

We discuss aspects of the low energy phenomenology of the MSSM, in the large $\tan \beta$ regime. We explore the regions of the parameter space where the $h_t$ and $h_b$ Yukawa couplings exhibit a fixed point structure, using previous analytic solutions for these couplings. Expressions for the parameters $A_t$ and $A_b$ and the renormalised soft mass terms are also derived, making it possible to estimate analytically the sparticle loop -- corrections to the bottom mass, which are important in this limit.

13 pages,latex file, 3 latex figures included. Version to appear in Phys. Lett. B

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• Unification, KK-thresholds and the top Yukawa coupling in F-theory GUTs