Study on B→φK~* and B_d→φK_S decays in a flavor changing Z′ model  

作　　者：Wang ShuaiWei Huang JinShu Song TaiPing Lu GongRu 

机构地区：[1]Department of Physics,Nanyang Normal University,Nanyang 473061,China [2]Department of Physics,Henan Normal University,Xinxiang 453007,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2008年第9期1245-1253,共9页中国科学：物理学、力学、天文学（英文版）

基　　金：the National Natural Science Foundation of China (Grant No 10575029);the Natural Science Foundation of Henan Province of China (Grant No 0611050300);the Natural Science Foundation of Henan Provincial Educational Committee (Grant No 2007140013);the High-qualified Talents Scientific Research Startup Foundation of Nanyang Normal University (Grant No nytc2006k92)

摘　　要：We study the polarization anomaly of the Bd →φK*0 decay and the time-dependent CP asymmetry SφKS of the Bd →φKS decay in a Z′ model associated with flavor changing neutral currents at the tree level. We obtain the results of 0.0113<ξ<0.0127 and 0.0226<ξ<0.0255 for the two decay processes when setting ξLL=ξRL=ξLR=ξRR=ξ,ξLL=ξRL=ξ,and ξLR=ξRR=0,respectively. These results are consistent with the constraints and assumptions on the model parameters in some references.We study the polarization anomaly of the B d → φK *0 decay and the time-dependent CP asymmetry S φKS of the B d → φK S decay in a Z′ model associated with flavor changing neutral currents at the tree level. We obtain the results of 0.0113 < ξ < 0.0127 and 0.0226 < ξ < 0.0255 for the two decay processes when setting ξ LL = ξ RL = ξ LR = ξ RR = ξ, ξ LL = ξ RL = ξ, and ξ LR = ξ RR = 0, respectively. These results are consistent with the constraints and assumptions on the model parameters in some references.

关 键 词：Z′ MODEL QCD FACTORIZATION FLAVOR CHANGING neutral currents 

分 类 号：O571.3[理学—粒子物理与原子核物理]