Probing D^*_s0(2317) in the decays of B to two charmed mesons [article]

Zhi-Qing Zhang, Meng-Ge Wang, Yan-Chao Zhao, Zhi-Lin Guan, Na Wang
2021 arXiv   pre-print
We probe the inner structure of the meson D^*_s0(2317) through the decays of B_(s) to two charmed mesons within pQCD approach. Assuming D^*_s0(2317) as a scalar meson with c̅s structure, we find that the predictions for the branching ratios of the decays B^+→ D^*+_s0(2317)D̅^(*)0, B^0→ D^*+_s0(2317)D^(*)- can explain data within errors. The branching ratios for the decays B_s→ D^*+_s0(2317)D_s^(*)+ are estimated to reach up to 10^-3 order, which can be observed by the present LHCb and SuperKEKB
more » ... experiments. In this work, the decay constant of the meson D^*_s0(2317) is an input parameter. Unfortunately, its value has been studied by many references but with large uncertainties. Our calculation shows that a smaller decay constant of the meson D^*_s0(2317) is supported by compared with the present data, say 55∼70 MeV. We also calculate the ratios R_1=Br(B^+→ D^*+_s0(2317)D̅^0)/Br(B^+→ D^*+_s0(2317)D̅^*0)) and R_2=Br(B^0→ D^*+_s0(2317)D^-)/Br(B^0→ D^*+_s0(2317)D^*-), which are valuable to determine the inner structure of D^*_s0(2317) by compared with the experimental results. Our predictions for the ratios R_1,2 are consistent with the present data within errors.We expect that these two ratios can be well measured by the future experiments through improving the measurement accuracy for the decays B^+→ D^*+_s0(2317)D̅^*0 and B^0→ D^*+_s0(2317)D^*-.
arXiv:2105.02688v1 fatcat:df65gu6znreznnhvw7fffs53ee