B→πη(), η()η() decays and NLO contributions in the pQCD approach
By employing the perturbative QCD (pQCD) factorization approach, we calculate the full leading and the partial next-to-leading order (NLO) contributions to the seven B→πη(') and η(')η(') decays. For B+B→π+η(') decays, the pQCD predictions for their decay rates agree very well with the data after the inclusion of the small NLO contributions. For neutral decays, the pQCD predictions are also consistent with the experimental upper limits and can be tested by the LHC experiments. The measured value of ACPdir(π±η)=-19±7% can also be accommodated by the pQCD approach.
作 者： ZHANG Zhi-Qing LIU Xin XIAO Zhen-Jun 作者单位： Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing 210097, China 刊 名： 中国物理C（英文版） ISTIC 英文刊名： CHINESE PHYSICS C 年，卷(期)： 2009 33(9) 分类号： O4 关键词： B meson decay the pQCD factorization approach branching ratio