→■_2~*(1430)ω中的电荷不对称性及其对~0→a_2(1320)^- π^+和a_2(1320)^-ρ^+的影响(英文)  

Charge asymmetry in B→K_2~* (1430)ω and its implications in B^0→a_2(1320)^- π^+ and a_2 (1320)^- ρ^+

作　　者：杨德山[1] 杨绍恺[1] 

机构地区：[1]中国科学院研究生院物理学院,北京100049

出　　处：《中国科学院研究生院学报》2012年第4期433-438,共6页Journal of the Graduate School of the Chinese Academy of Sciences

基　　金：Supported by National Natural Science Foundation of China(10705050,10935012)

摘　　要：BaBar实验组在→■_2～*(1430)ω衰变中观测到大的电荷不对称性.我们指出增强的张量介子发射图贡献可以解释这种不对称性.从实验结果中提取出张量介子发射图的贡献,将其应用到～0→a_2(1320)～- π～+衰变中.预言的结果比以往的理论预言要大很多.该结果将在不久的KEK-SuperB、LHCb实验中得到检验.The large charge asymmetry in ^-B →^-K2^＊ （1430）ω observed by the BaBar collaboration is hard to be explained within the framework of QCD faetorization. We show that the enhanced tensor meson emission may cause such difficulties in the QCD factorization. We focus on the longitudinal part of the decay amplitude for ^-B →^-K2^＊ （1430）ω. We extract the tensor emission contribution from the experimental data and apply them to the Cabibbo favored B decays ^-B0 →a2-π^＋ （p^＋） by using the SU（3） flavor symmetry minimally. The predicted branching ratios of these decays are much greater than those obtained by the QCD factorization. Our results will be examined by future experimental measurements at the KEK-SuperB and LHCb.

关 键 词：B衰变 电荷不对称性 张量介子 QCD因子化 味对称性 

分 类 号：O572.2[理学—粒子物理与原子核物理]