Promising process to distinguish supersymmetric models with large tan betafrom the standard model: B -> X-s mu(+)mu(-) - art. no. 011701

It is shown that in supersymmetric models the large supersymmetric contribu tions to B --> X(s)mu(+)mu(-) come from the Feynman diagrams which consist of exchanging neutral Higgs boson loops and are proportional to m(b)m(mu)ta n(3)beta/m(h)(2) when tan beta is large and the mass of the lightest neutra l Higgs boson m(h) is not too large (say, less than 150 GeV). Numerical res ults show that the branching ratios of B --> X(s)mu(+)mu(-) can be enhanced by more than 100% compared to the standard model (SM) and the backward-for ward asymmetry of the lepton is significantly different from that in the SM when tan beta greater than or equal to 30.