Remarks on semileptonic B and D decays into orbitally excited mesons

Abstract

We have obtained the differential decay rate and calculated the branching ratios of the exclusive semileptonic decays B(D) → Xlν, where X is a p-wave meson, using the nonrelativistic ISGW quark model. Our results are compared with the predictions of the ISGW2 model. We have computed some branching ratios that were not reported or were reported with 0.00 in this model. For example, we find that Br(Bc− → B̄s2*0l−ν̄) = 4.03 × 10−5, Br(Bc− → B̄2*0l− ν̄) = 3.65 × 10−6 and Br(D+s → f2l+ν) = 2.7 × 10−5, which seem to be within the reach of forthcoming experiments. Furthermore, we have classified the Bu,d,s → Tlν decays into two groups and compared the semileptonic and nonleptonic decays including a tensor meson in the final state.