The LHCb has reported the observation of a resonancelike structure, the Pc(4450), in the J/ψ p invariant masses. In our work, we discuss the feasibility of detecting this structure in J/ψ photoproduction, e.g. in the measurements that have been approved for the experiments in Hall A/C and in Hall B with CLAS12 at JLab. Also the GlueX Collaboration has already reported preliminary results. We take into account the experimental resolution effects, and perform a global fit to world J/ψ photoproduction data in order to study the possibility of observing the Pc(4450) signal in future JLab data. We present a first estimate of the upper limit for the branching ratio of the Pc(4450) into the J/ψ p channel, and we study the angular distributions of the differential cross sections. This will shed light on the nature and couplings of the Pc(4450) structure in the future photoproduction experiments.
Studying the P_c(4450) Resonance in J/psi Photoproduction Off Protons / Hiller Blin, Astrid N.; Fernández-Ramírez, Cesar; Jackura, Andrew; Mathieu, Vincent; Mokeev, Victor I.; Pilloni, Alessandro; Szczepaniak, Adam P.. - In: FEW-BODY SYSTEMS. - ISSN 0177-7963. - ELETTRONICO. - 59:5(2018). (Intervento presentato al convegno 11th International Workshop on the Physics of Excited Nucleons (NSTAR2017) tenutosi a Columbia, SC (USA)) [10.1007/s00601-018-1426-3].
Studying the P_c(4450) Resonance in J/psi Photoproduction Off Protons
Pilloni, Alessandro;
2018
Abstract
The LHCb has reported the observation of a resonancelike structure, the Pc(4450), in the J/ψ p invariant masses. In our work, we discuss the feasibility of detecting this structure in J/ψ photoproduction, e.g. in the measurements that have been approved for the experiments in Hall A/C and in Hall B with CLAS12 at JLab. Also the GlueX Collaboration has already reported preliminary results. We take into account the experimental resolution effects, and perform a global fit to world J/ψ photoproduction data in order to study the possibility of observing the Pc(4450) signal in future JLab data. We present a first estimate of the upper limit for the branching ratio of the Pc(4450) into the J/ψ p channel, and we study the angular distributions of the differential cross sections. This will shed light on the nature and couplings of the Pc(4450) structure in the future photoproduction experiments.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
