Phenomenological constraints on patterns of supersymmetry breaking

Specific models of supersymmetry breaking predict relations between the trilinear and bilinear soft supersymmetry breaking parameters A(0) and B-0 at the input scale. In such models, the value of tan beta can be calculated as a function of the scalar masses m(0) and the gaugino masses m(1/2), which we assume to be universal. The experimental constraints on sparticle and Higgs masses, b --> sgamma decay and the cold dark matter density Omega(CDM)h(2) can then be used to constrain tan beta in such specific models of supersymmetry breaking. In the simplest Polonyi model with A(0) = (3 - root3)m(0) = B-0 + m(0), we find 11 tan beta less than or similar to 20 (tan beta similar or equal to 4.15) for mu > 0 (mu < 0). We also discuss other models with A(0) = B-0 + m(0), finding that only the range -1.9 less than or similar to A(0)/m(0) less than or similar to 2.5 is allowed for mu > 0, and the range 1.25 less than or similar to A(0)/m(0) less than or similar to 4.8 for mu < 0. In these models, we find no solutions in the rapid-annihilation 'funnels' or in the 'focus-point' region. We also discuss the allowed range of tan beta in the no-scale model with A(0) = B-0 = 0. In all these models, most of the allowed regions are in the chi - (tau) over tilde (1) coannihilation 'tail'. (C) 2003 Elsevier B.V. All rights reserved.