Prospects for rare and forbidden hyperon decays at BESⅢ  

作　　者：Hai-Bo Li 

机构地区：[1]Institute of High Energy Physics, Beijing 100049, China [2]University of Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Frontiers of physics》2017年第5期1-10,共10页物理学前沿（英文版）

基　　金：Acknowledgements The author would like to thank Stephen L. Olsen, I. I. Bigi, and Xu Feng for useful discussions and suggestions and also J. G. K＆rner, Francesco Dettori, and J. Tandean for their useful comments. This work is supported in part by the National Natural Science Foundation of China under Contracts Nos. 11335009 and 11125525, the Joint Large-Scale Scientific Facility Funds of the NSFC and CAS under Contract No. U1532257, CAS under Contract No. QYZDJ-SSW-SLH003, and the National Key Basic Research Program of China under Contract No. 2015CB856700.

摘　　要：The study of hyperon decays at the Beijing Electron Spectrometer Ⅲ （BESⅢ） is proposed to investigate the events of J/φ decay into hyperon pairs, which provide a pristine experimental environment at the Beijing Electron-Positron Collider Ⅱ. About 10^6-10^8 hyperons, i.e., ∧, ∑, ∈, and Ω, will be produced in the J/φ and φ（2S） decays with the proposed data samples at BESⅢ. Based on these samples, the measurement sensitivity of the branching fractions of the hyperon decays is in the range of 10^-5-10^-8. In addition, with the known center-of-mass energy and ＂tag technique＂, rare decays and decays with invisible final states can be probed.The study of hyperon decays at the Beijing Electron Spectrometer Ⅲ （BESⅢ） is proposed to investigate the events of J/φ decay into hyperon pairs, which provide a pristine experimental environment at the Beijing Electron-Positron Collider Ⅱ. About 10^6-10^8 hyperons, i.e., ∧, ∑, ∈, and Ω, will be produced in the J/φ and φ（2S） decays with the proposed data samples at BESⅢ. Based on these samples, the measurement sensitivity of the branching fractions of the hyperon decays is in the range of 10^-5-10^-8. In addition, with the known center-of-mass energy and ＂tag technique＂, rare decays and decays with invisible final states can be probed.

关 键 词：BESⅢ J/φ decay HYPERON rare decay FCNC lepton flavor violation 

分 类 号：O572.2[理学—粒子物理与原子核物理] O572.214[理学—物理]