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.
作者
房双世
Andrzej Kupsc
魏代会
Shuang-shi Fang;Andrzej Kupsc;Dai-hui Wei(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)
基金
Supported by National Natural Science Foundation of China(NSFC)(11565006,11675184,11735014)
