收稿日期: 2011-04-27
修回日期: 2011-05-10
网络出版日期: 2012-07-15
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+
Received date: 2011-04-27
Revised date: 2011-05-10
Online published: 2012-07-15
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 . DOI: 10.7523/j.issn.2095-6134.2012.4.001
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
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