Study of B_(s) meson decays to D_0^∗(2300) ,D_s0^∗(2317) , D_s1(2460) and D_s1(2536) within the covariant light-front approach

In this work, we investigate the form factors of the transitions B_(s)→ D_0^∗(2300),D_s0^∗(2317), D_s1(2460) and D_s1(2536) in the covariant light-front quark model (CLFQM), where these final states are considered as P-wave excited charmed mesons. In order to obtain the form factors for the physical transition processes, we need to extend these form factors from the space-like region to the time-like region. The q^2-dependence for each transition form factor is also plotted. Then, combined with those form factors, the branching ratios of the two-body nonleptonic decays B_(s)→ D^*_(s)0(2300,2317)M, D_s1(2460,2536)M with M being a light pseudoscalar (vector) meson or a charmed meson are calculated by considering the QCD radiative corrections to the hadronic matrix elements with the QCD factorization approach. Most of our predictions are comparable to the results given by other theoretical approaches and the present available data.