2012/07/25 by Shen, Yue-Long, Yu, Xin
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)
paper · doi:10.48550/arxiv.1207.5912
The study on the charmed scalar meson spectroscopy has become a hot topic both experimentally and theoretically. The B(s) decays provide an ideal place to study their property. We employ the B-meson light-cone sum rules to compute the Bs0→ Ds*+(2317) and B-→ D0*0(2400) transition form factors at large recoil, assuming Ds*+(2317) and D0*0(2400) being scalar quark-anti-quark states. The results are extrapolated to the whole momentum region with the help of HQET. Considering large uncertainties, our results can be consistent with the previous studies, while the power corrections should be large. We also estimate the semi-leptonic decays Bs0→ Ds*+(2317)l νl and B-→ D0*0(2400)l νl. The branching fraction of the semi-leptonic Bs0→ Ds*+(2317)l νl decay is around 6× 10-3 for light leptons and 0.8× 10-3 for tau final state. The predicted branching ration of B-→ D0*0(2400)l νl is slightly larger than Bs0→ Ds*+(2317)l νl, and we hope the future data in LHCb can test these results.