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   作者單位： Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing 210097, China  刊 名： 中國物理C（英文版）  ISTIC 英文刊名： CHINESE PHYSICS　C  年，卷(期)： 2009 33(9)  分類號： O4  關鍵詞： B meson decay   the pQCD factorization approach   branching ratio  

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