B*q →D q V和 Pq D*非轻弱衰变的研究

Bq →D q V和 Pq D非轻弱衰变的研究

摘要: 基于强子、电子对撞机LHC和B e l l e - I I上的重味物理实验,详细研究了B-*→D D-*、Dρ-、D K *-、πD *和K D *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B S W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 q D s*-和D qρ-衰变有比较大的分支比,数量级高达1 0-8 .因此,这两个过程将有望较早地被LHC和B e l l e - I I实验所观测到.

Abstract: 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 meson evaluated with the BSW model, the branching fractions and the polarization fractions were firstly presented. Numerically, the B*q→DqDs*－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.