B→K2*(1430)ω中的电荷不对称性及其对B0→a2(1320)-π+和a2(1320)-ρ+的影响

doi:10.7523/j.issn.2095-6134.2012.4.001

中国科学院大学学报 ›› 2012, Vol. 29 ›› Issue (4): 433-438.DOI: 10.7523/j.issn.2095-6134.2012.4.001

• 物理学 • 下一篇

B→K₂^*(1430)ω中的电荷不对称性及其对B⁰→a₂(1320)^-π⁺和a₂(1320)^-ρ⁺的影响

杨德山, 杨绍恺

中国科学院研究生院物理学院, 北京 100049

收稿日期:2011-04-27 修回日期:2011-05-10 发布日期:2012-07-15
通讯作者: 杨德山, 杨绍恺
基金资助:
Supported by National Natural Science Foundation of China (10705050, 10935012)

Charge asymmetry in B→K₂^*(1430)ω and its implications in B⁰→a₂(1320)^-π⁺ and a₂(1320)^-ρ⁺

YANG De-Shan, YANG Shao-Kai

College of Physical Sciences, Graduate University, Chinese Academy of Sciences, Beijing 100049, China

Received:2011-04-27 Revised:2011-05-10 Published:2012-07-15

摘要/Abstract

摘要：

B→K₂^*(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B⁰→a₂(1320)^-π⁺和a₂(1320)^-ρ⁺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.

关键词: B衰变, 电荷不对称性, 张量介子, QCD因子化, 味对称性

Abstract:

The large charge asymmetry in B→K₂^*(1430)ω observed by the BaBar collaboration is hard to be explained within the framework of QCD factorization. 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⁺(ρ⁺) 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.

Key words: B decays, charge asymmetry, tensor mesons, QCD factorization, flavor symmetry

中图分类号:

O572.2

杨德山, 杨绍恺. B→K₂^*(1430)ω中的电荷不对称性及其对B⁰→a₂(1320)^-π⁺和a₂(1320)^-ρ⁺的影响[J]. 中国科学院大学学报, 2012, 29(4): 433-438.

YANG De-Shan, YANG Shao-Kai. Charge asymmetry in B→K₂^*(1430)ω and its implications in B⁰→a₂(1320)^-π⁺ and a₂(1320)^-ρ⁺[J]. , 2012, 29(4): 433-438.

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B→K₂^*(1430)ω中的电荷不对称性及其对B⁰→a₂(1320)^-π⁺和a₂(1320)^-ρ⁺的影响

Charge asymmetry in B→K₂^*(1430)ω and its implications in B⁰→a₂(1320)^-π⁺ and a₂(1320)^-ρ⁺

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