( g−2) μ and CP asymmetries in B0d, s→ l+l− and b→ sγ in SUSY models

Abstract

We show that with a good fit to the muon g−2 constraint, the CP asymmetry can be as large as 25% (15%) for B 0 d → τ + τ − ( B 0 d → μ + μ −) in SUGRA models with nonuniversal gaugino masses and MSSM. If tau events indentified at B factories the CP asymmetry in B 0 d → τ + τ − can be a powerful probe on physics beyond SM. An interesting case is that new physics gives a prediction on the branching ratio which is still in the uncertain region of the SM prediction. The CP asymmetry for B 0 d → l + l − in this case can still reach 20%. So it is powerful to shed light on physics beyond SM while the CP asymmetry of b→ sγ in this case can only reach 2% at most which is too small to draw a definite conclusion on new physics effects at B factories.