Search for new physics via CP violation in $B_{d,s} \to l^+ l^-

Abstract

It is shown that in the approximation of $|\frac{q}{p}|$=1 the CP violation in $B_{d,s}^0\to l^{+}{l}^{-}$ decays vanishes in SM. In a 2HDM with CP violating phases and MSSM the CP asymmetries depend on the parameters of models and can be as large as 40% for $B_d^0$ and 3% for $B_s^0$. An observation of CP asymmetry in the decays would unambiguously signal the existence of new physics.

Comments: shortened version, latex, 10 pages, 2 figures, comments added