Towards the establishment of the light J^(P(C))=1^(-(+))hybrid nonet  

作　　者：Lin Qiu Qiang Zhao 邱林;赵强(Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;University of Chinese Academy of Sciences,Beijing 100049,China;China Center of Advanced Science and Technology,Chinese Academy of Sciences,Beijing 100080,China)

机构地区：[1]Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]China Center of Advanced Science and Technology,Chinese Academy of Sciences,Beijing 100080,China

出　　处：《Chinese Physics C》2022年第5期1-10,共10页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China(11425525,11521505);DFG and NSFC funds to the Sino-German CRC 110"Symmetries and the Emergence of Structure in QCD''(NSFC 12070131001,DFG Project-ID 196253076);the Strategic Priority Research Program of Chinese Academy of Sciences(XDB34030302);the National Key Basic Research Program of China(2020YFA0406300)。

摘　　要：The observation of the light hybrid candidateη_(1)(1855)by the BESⅢ Collaboration offers great opportunities for advancing our knowledge on exotic hadrons in terms of flavor sector.We demonstrate that this observation provides a crucial clue for establishing the J^(P(C))=1^(−(+))hybrid nonet.Based on the flux tube model picture,the production and decay mechanisms for the J^(P(C))=1^(−(+))hybrid nonet in the J/ψradiative decays into two pseudoscalar mesons are investigated.In the I=0 sector,we deduce that the SU(3)flavor octet and singlet mixing is non-negligible and apparently deviates from the flavor ideal mixing.Because only signals for one isoscalarη_(1)(1855)are observed in theηη′channel,we investigate two schemes of the nonet structure in whichη_(1)(1855)can either be the higher or lower mass state that strongly couples toηη′.Possible channels for detecting the multiplets are suggested.In particular,a combined analysis of the hybrid production in J/ψ→VH,where V and H denote the light vector mesons and 1^(−(+))hybrid states,respectively,may provide further evidence for this nonet structure and ultimately establish these mysterious exotic species in the experiment.

关 键 词：exotic hadrons HYBRID quark model 

分 类 号：O572.33[理学—粒子物理与原子核物理]