Charmed baryon decay asymmetry in e^＋e^- annihilation  

作　　者：王丹 平荣刚 李蕾 吕晓睿 郑阳恒 

机构地区：[1]University of Chinese Academy of Science, Beijing 100049, China [2]Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China [3]Beijing Institute of Petrochemical Technology, Beijing 102617, China [4]CAS Key Laboratory of Vacuum Physics, UCAS, Beijing 100049, China

出　　处：《Chinese Physics C》2017年第2期95-100,共6页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(11375205,11175146,11275266,11235011,11425524,11505010,11565006);Beijing Municipal Government Foundation(KM201610017009,2015000020124G064);Youth Innovation Promotion Association of CAS

摘　　要：We propose to measure the decay asymmetry parameters in the hadronic weak decays of singly charmed baryons, such as Λc^＋ →Λπ^＋, Σ^0π^＋, pK0, Ξ0c →Ξ-π＋and Ω^0c →Ω^-π^＋. The joint angular formulae for these processes are presented, and are used to extract the asymmetry parameters in e^＋e^-annihilation data. Base on the currentΛ＋c data set collected at BESIII, we estimate the experimental sensitivities to measure the parameters αΛπ＋forΛ＋c →Λπ＋, αΣ＋π0for Λc^＋ →Σ＋π^0 and αΣ0π＋for Λc^＋ →Σ^0π^＋.We propose to measure the decay asymmetry parameters in the hadronic weak decays of singly charmed baryons, such as Λc^＋ →Λπ^＋, Σ^0π^＋, pK0, Ξ0c →Ξ-π＋and Ω^0c →Ω^-π^＋. The joint angular formulae for these processes are presented, and are used to extract the asymmetry parameters in e^＋e^-annihilation data. Base on the currentΛ＋c data set collected at BESIII, we estimate the experimental sensitivities to measure the parameters αΛπ＋forΛ＋c →Λπ＋, αΣ＋π0for Λc^＋ →Σ＋π^0 and αΣ0π＋for Λc^＋ →Σ^0π^＋.

关 键 词：charmed baryon decay decay asymmetry e^＋e^- collider 

分 类 号：O572.34[理学—粒子物理与原子核物理]