B_q~*→D_qV和P_qD~*非轻弱衰变的研究

Study of Nonleptonic B_q~*→D_qV and P_qD~* Weak Decays

基于强子、电子对撞机LHC和Belle-Ⅱ上的重味物理实验,详细研究了B~*→DD~*、Dρ^-、DK^(*-)、πD~*和KD~*等非轻衰变.采用简单因子化方法计算了这些过程的衰变振幅,并利用BSW模型计算了和这些过程相关的形状因子,进而给出了这些衰变过程的分支比和极化分数.从数值结果来看,B_q~*→D_qD_s^(*-)和D_qρ^-衰变有比较大的分支比,数量级高达10^(-8).因此,这两个过程将有望较早地被LHC和Belle-Ⅱ实验所观测到.

Motivated by the experiments of heavy flavor physics at running LHC and upgrading Belle-II in the future,the nonleptonic B-＊ →DD-＊ ,Dρ- ,DK＊- ,πD＊ and KD＊ weak decays were studied in details.With the amplitudes calculated with factorization approach and the form factors of B＊ ransition into pseudoscalar mes-on evaluated with the BSW model,the branching fractions and the polarization fractions were firstly presented. Numerically,the B-＊q → Dq Ds ＊- and Dqρ- decays had the large branching fractions,10 -8 ,which should be sought for with priority and firstly observed by LHC and Belle-II experiments.