Search for new physics in the B→K^((*))l^+l^- decays at BABAR  

作　　者：孙亮 

机构地区：[1]Institut de Physique Nucléaire de Lyon

出　　处：《Chinese Physics C》2010年第9期1504-1507,共4页中国物理C（英文版）

摘　　要：Based on a data sample of 384 million BB pairs collected with the BABAR detector at the PEP-Ⅱ asymmetric e ＋ e ￣ storage ring,we measure branching fractions,direct CP,isospin and lepton-flavor asymmetries for the rare decays B → K （＊） l ＋ l￣ in two di-lepton mass bins above and below the J/ψ resonance.For the B → K＊ l ＋ l￣ decay,we also measure the K＊ longitudinal polarization fraction and the di-lepton forwardbackward asymmetry.Based on a data sample of 384 million BB pairs collected with the BABAR detector at the PEP-Ⅱ asymmetric e ＋ e ￣ storage ring,we measure branching fractions,direct CP,isospin and lepton-flavor asymmetries for the rare decays B → K （＊） l ＋ l￣ in two di-lepton mass bins above and below the J/ψ resonance.For the B → K＊ l ＋ l￣ decay,we also measure the K＊ longitudinal polarization fraction and the di-lepton forwardbackward asymmetry.

关 键 词：rare B decay branching fraction direct CP asymmetry lepton flavor ratio isospin asymmetry K＊ longitudinal polarization fraction lepton forward-backward asymmetry 

分 类 号：O571.3[理学—粒子物理与原子核物理]