Recently,the LHCb experiment announced the observation of hidden-charm pentaquark states Pc(4312),Pc(4440),and Pc(4457)nearΣcDandΣcD*thresholds.In this present work,we studied these pentaquarks in the framework of t...Recently,the LHCb experiment announced the observation of hidden-charm pentaquark states Pc(4312),Pc(4440),and Pc(4457)nearΣcDandΣcD*thresholds.In this present work,we studied these pentaquarks in the framework of the nonrelativistic quark model with four types of potential.We solved five-body Schrodinger equation by using the artificial neural network method and made predictions of parities for these states,which are not yet determined by experiment.The mass of another possible pentaquark state near the D*Σc*with JP=5/2-is also calculated.展开更多
文摘Recently,the LHCb experiment announced the observation of hidden-charm pentaquark states Pc(4312),Pc(4440),and Pc(4457)nearΣcDandΣcD*thresholds.In this present work,we studied these pentaquarks in the framework of the nonrelativistic quark model with four types of potential.We solved five-body Schrodinger equation by using the artificial neural network method and made predictions of parities for these states,which are not yet determined by experiment.The mass of another possible pentaquark state near the D*Σc*with JP=5/2-is also calculated.