1 CP violating transverse lepton polarizaion in B → D ( ∗ ) l ν̄ including tensor interactions

We give a model-independent analysis of CP violating lepton polarization in the exclusive semileptonic B decay of B → D(∗)lν̄ including dimension six four-fermion tensor interactions at the heavy quark limit. It is shown that the tensor interactions should not be neglected if the associated couplings are comparable to others. The effect of tensor interactions on the transverse polarization appears more dramatically in B → D than in B → D∗. In the leptoquark model, the average transverse polarization is estimated to be |P⊥ D | ≃ 0.26 and |P⊥ D | ≃ 0.076 with commonly used model parameters. Typeset using REVTEX ∗Email address: [email protected] 1