We investigate the semi-inclusive production of hidden-charm exotic states,including the X(3872),Z_(c),Zcs and pentaquark P_(c) states,in lepton-proton scattering processes.These hadrons are close to the thresholds of...We investigate the semi-inclusive production of hidden-charm exotic states,including the X(3872),Z_(c),Zcs and pentaquark P_(c) states,in lepton-proton scattering processes.These hadrons are close to the thresholds of a pair of charm and anticharm hadrons and are assumed to possess a hadronic molecular structure as their main feature.To provide order-of-magnitude estimates of the cross sections,we use Pythia to simulate the short-distance productions of the constituent hadrons,which then rescatter to form exotic hadrons.The estimates for the X(3872)and Z_(c)(3900)^(±)states are not in conflict with the upper limits measured in the COMPASS experiment for the exclusive photoproduction process.The results indicate that the considered hidden-charm states can be copiously produced at the proposed electron-ion colliders EicC and US-EIC.展开更多
基金Supported in part by the Chinese Academy of Sciences(CAS)(XDB34030000,QYZDB-SSW-SYS013)the National Natural Science Foundation of China(NS-FC)(11835015,12047503,11961141012,11847301)+1 种基金the Fundamental Research Funds for the Central Universities(2019CDJDWL0005)NSFC and the Deutsche Forschungsgemeinschaft(DFG)through the Sino-German Collaborative Research Center"Symmetries and the Emergence of Structure in QCD"(NSFC 12070131001,DFG Project-ID 196253076-TRR110)。
文摘We investigate the semi-inclusive production of hidden-charm exotic states,including the X(3872),Z_(c),Zcs and pentaquark P_(c) states,in lepton-proton scattering processes.These hadrons are close to the thresholds of a pair of charm and anticharm hadrons and are assumed to possess a hadronic molecular structure as their main feature.To provide order-of-magnitude estimates of the cross sections,we use Pythia to simulate the short-distance productions of the constituent hadrons,which then rescatter to form exotic hadrons.The estimates for the X(3872)and Z_(c)(3900)^(±)states are not in conflict with the upper limits measured in the COMPASS experiment for the exclusive photoproduction process.The results indicate that the considered hidden-charm states can be copiously produced at the proposed electron-ion colliders EicC and US-EIC.
