Study of singlet-triplet mixing via semileptonic decays  

作　　者：姜越 王国利 王天鸿 鞠万里 

机构地区：[1]Department of Physics,Harbin Institute of Technology [2]PITT PACC,Department of Physics & Astronomy,University of Pittsburgh

出　　处：《Chinese Physics C》2013年第1期21-26,共6页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(11175051)

摘　　要：The singlet-triplet mixing of 1P1-3P1 is studied via calculating the branching ratios of semileptonic decay Bs→Ds1lν and B→D1lν by means of the instantaneous Bethe-Salpeter method. Special attention is paid to the relativistic corrections, since they are large for the P-wave states. Using the Mandelstam Formalism, we compute the transition form factors not only in the high-energy lepton end-point region but also in the full Q2 region. And the non-perturbative QCD effects are taken care of in the overlapping integral over the relativistic wave functions of the initial and nial states.The singlet-triplet mixing of 1P1-3P1 is studied via calculating the branching ratios of semileptonic decay Bs→Ds1lν and B→D1lν by means of the instantaneous Bethe-Salpeter method. Special attention is paid to the relativistic corrections, since they are large for the P-wave states. Using the Mandelstam Formalism, we compute the transition form factors not only in the high-energy lepton end-point region but also in the full Q2 region. And the non-perturbative QCD effects are taken care of in the overlapping integral over the relativistic wave functions of the initial and nial states.

关 键 词：singlet-triplet mixing semileptonic decay instantaneous Bethe-Salpeter method 

分 类 号：O571.3[理学—粒子物理与原子核物理]