Study of semileptonic decays Bs → Ds1(2536)lν̄ and Bs → Ds2(2573)lν̄ in the CQM model**Supported by Natural Science Fund of Hebei Province (A2005000090,E2005000129), Fund of Education Department of Hebei Province (2007409) and Natural Science Fund of Hebei University (2005007)

Abstract

Based on the assumption that Ds1(2536) and Ds2(2573) belong to T doublet (1+,2+), we calculate the semileptonic decays of Bs to Ds1(2536) and Ds2(2573) in terms of the Constituent Quark Meson (CQM) model. For Bs → Ds1(2536)+lν̄ and Bs → Ds2(2573)+lν̄, the order of magnitude of the obtained branching ratios is 10−3. Our numerical results of the semileptonic decays of Bs to Ds1(2536) and Ds2(2573) are large, which implies that two semileptonic decays should be seen in future experiments.