Analytic approach to the MSSM mass spectrum in the large tan β regime Original Research Article

In various unified extensions of the Minimal Supersymmetric Standard Model, the Yukawa couplings of the third generation are predicted to be of the same order. As a result, low energy measured mass ratios require large ratios of the standard model Higgs vacuum expectation values, corresponding to a large value of the parameter tan β. We present analytic solutions for the Yukawa couplings and the Higgs and third generation squark masses, in the case of large top and bottom Yukawa couplings. We examine regions of these Yukawas which give predictions for the top mass compatible with the present experimentally determined top mass and provide useful approximate formulae for the scalars. We discuss the implications on the radiative symmetry breaking mechanism and derive constraints on the undetermined initial conditions of the scalars.