ANALYTIC APPROACH TO THE MSSM MASS-SPECTRUM IN THE LARGE TAN-BETA REGIME

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