Effects of CP phases on Bs,d0→l+l- in supersymmetry at large tan β

An analytic analysis of the effects of CP phases arising from the soft SUSY breaking parameters on the decays Bs,d0→l+l- at large tan β is given. It is found that the phases have a strong effect on the branching ratio and in some regions of the parameter space they can lead to a variation of the branching ratio by as much as 1-2 orders of magnitude. These results have important implications for the discovery of the Bs0→μ+μ- signal in run II of the Fermilab Tevatron and further on how the parameter space of SUSY models will be limited once the signal is found