An overview of η and η'decays at BESIII  

作　　者：Shuang-shi Fang Andrzej Kupsc Dai-hui Wei 房双世;Andrzej Kupsc;魏代会(Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, China;University of Chinese Academy of Sciences, Beijing 100049, China;Guangxi Normal University, Guilin 541004, China;Uppsala University, Box 516, SE-75120 Uppsala, Sweden)

机构地区：[1]Institute of High Energy Physics,Chinese Academy of Science,Beijing 100049,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Guangxi Normal University,Guilin 541004,China [4]Uppsala University,Box 516,SE-75120 Uppsala,Sweden

出　　处：《Chinese Physics C》2018年第4期44-61,共18页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(NSFC)(11565006,11675184,11735014)

摘　　要：The world＇s largest sample of J/ψ events, 1.31 billion events accumulated at the BESIII detector, provides a unique opportunity to investigate η and η physics via two-body J/ψ radiative or hadronic decays. For many η decay channels the low background data samples are up to three orders of magnitude larger than collected in any previous experiment. Here we review the most significant results on η and η obtained at BESIII so far. The analyses range from detailed studies of common decay dynamics, observations of new radiative and Dalitz decays, and searches for rare/forbidden decays with sensitivity up to B～10-5. Finally, prospects of forthcoming runs at the J/ψ peak forη and η physics are discussed.The world＇s largest sample of J/ψ events, 1.31 billion events accumulated at the BESIII detector, provides a unique opportunity to investigate η and η physics via two-body J/ψ radiative or hadronic decays. For many η decay channels the low background data samples are up to three orders of magnitude larger than collected in any previous experiment. Here we review the most significant results on η and η obtained at BESIII so far. The analyses range from detailed studies of common decay dynamics, observations of new radiative and Dalitz decays, and searches for rare/forbidden decays with sensitivity up to B～10-5. Finally, prospects of forthcoming runs at the J/ψ peak forη and η physics are discussed.

关 键 词：η/η＇ decays the BESIII detector J/ψ decays 

分 类 号：O572.33[理学—粒子物理与原子核物理]