Fourth generation effects in ■_s→π^-K+ decay  

Fourth generation effects in B_s→π^-K+ decay

作　　者：王帅伟 常钦 黄金书 吕林霞 

机构地区：[1]Department of Physics,Nanyang Normal University [2]Department of Physics,Henan Normal University

出　　处：《Chinese Physics C》2011年第9期808-811,共4页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (10805014,10947020,10979008);Natural Science Foundation of He’nan Province (092300410205,102300410210)

摘　　要：We study the effects of the fourth quark generation model in Bs→π^-K^＋ decay. Combining with the up-to-date experimental measurement for B（Bs→π^-K^＋） dir - and Acp ^dir（Bs→π^-K^＋） by the CDF Collaboration, we derive the new bound of weak phase Фbd, which are 0° 〈 Фbd 〈 44°,321° 〈 Фbd 〈 360° and 0° 〈 Фbd 〈 26°, 342° 〈Фbd 〈 360° for mr, ： 400 and 600 GeV respectively. In these regions, B（Bs→π^-K^＋） and Acp^dir （Bs→π^-K^＋） consist with the current experimental data within errors.We study the effects of the fourth quark generation model in Bs→π^-K^＋ decay. Combining with the up-to-date experimental measurement for B（Bs→π^-K^＋） dir - and Acp ^dir（Bs→π^-K^＋） by the CDF Collaboration, we derive the new bound of weak phase Фbd, which are 0° 〈 Фbd 〈 44°,321° 〈 Фbd 〈 360° and 0° 〈 Фbd 〈 26°, 342° 〈Фbd 〈 360° for mr, ： 400 and 600 GeV respectively. In these regions, B（Bs→π^-K^＋） and Acp^dir （Bs→π^-K^＋） consist with the current experimental data within errors.

关 键 词：Bs meson fourth generation QCD factorization 

分 类 号：O572.33[理学—粒子物理与原子核物理]