We investigate the J/Ψ? invariant mass distribution in the e^+e^-→γJ/Ψ? reaction at a center-of-mass energy of ■=4.6 GeV measured by the BESⅢ collaboration,which concluded that no significant signals were observ...We investigate the J/Ψ? invariant mass distribution in the e^+e^-→γJ/Ψ? reaction at a center-of-mass energy of ■=4.6 GeV measured by the BESⅢ collaboration,which concluded that no significant signals were observed for e^+e^-→γX(4140) because of the low statistics.We show,however,that the J/Ψ? invariant mass distribution is compatible with the existence of the X(4140) state,appearing as a peak,and a strong cusp structure at the D_s~*■threshold,resulting from the molecular nature of the X(4160) state,which provides a substantial contribution to the reaction.This is consistent with our previous analysis of the B^+→J/Ψ?K^+decay measured by the LHCb collaboration.We strongly suggest further measurements of this process with more statistics to clarify the nature of the X(4140) and X(4160) resonances.展开更多
In this paper, I review recent progress in the study of the XYZ particles at Belle. I only focus on studies with charmonium and one or more light mesons in the final states. This covers the X（3872）, X（3915）, Y（4...In this paper, I review recent progress in the study of the XYZ particles at Belle. I only focus on studies with charmonium and one or more light mesons in the final states. This covers the X（3872）, X（3915）, Y（4140）, X（4350）, and the charged Z states.展开更多
基金Partly supported by the National Natural Science Foundation of China(11735003,11522539,11505158,11475015,11647601)supported by the Youth Innovation Promotion Association CAS(2016367)+4 种基金Key Research Projects of Henan Higher Education Institutions(20A140027)the Academic Improvement Project of Zhengzhou Universitypartly supported by the Spanish Ministerio de Economia y Competitividad and European FEDER funds under the contract number FIS2014-57026-REDT,FIS2014-51948-C2-1-P,and FIS2014-51948-C2-2-Pthe Generalitat Valenciana in the program Prometeo Ⅱ2014/068the proyecto Severo Ochoa del IFIC,SEV-2014-0398
文摘We investigate the J/Ψ? invariant mass distribution in the e^+e^-→γJ/Ψ? reaction at a center-of-mass energy of ■=4.6 GeV measured by the BESⅢ collaboration,which concluded that no significant signals were observed for e^+e^-→γX(4140) because of the low statistics.We show,however,that the J/Ψ? invariant mass distribution is compatible with the existence of the X(4140) state,appearing as a peak,and a strong cusp structure at the D_s~*■threshold,resulting from the molecular nature of the X(4160) state,which provides a substantial contribution to the reaction.This is consistent with our previous analysis of the B^+→J/Ψ?K^+decay measured by the LHCb collaboration.We strongly suggest further measurements of this process with more statistics to clarify the nature of the X(4140) and X(4160) resonances.
基金Supported by National Natural Science Foundation of China (10825524,10935008)Department of Energy (DE-FG02-04ER41291) (U Hawaii)
文摘In this paper, I review recent progress in the study of the XYZ particles at Belle. I only focus on studies with charmonium and one or more light mesons in the final states. This covers the X（3872）, X（3915）, Y（4140）, X（4350）, and the charged Z states.
