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arXiv · 1801.10211

Studying the Pc(4450) resonance in J/psi photoproduction off protons

Astrid N. Hiller Blin·César Fernández-Ramírez·Andrew Jackura·Vincent Mathieu·Victor I. Mokeev·Alessandro Pilloni·Adam P. Szczepaniak
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Abstract

The LHCb has reported the observation of a resonancelike structure, the Pc(4450), in the J/psi p invariant masses. In our work, we discuss the feasibility of detecting this structure in J/psi 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/psi 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/psi 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.

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Astrid N. Hiller Blin, César Fernández-Ramírez, Andrew Jackura, Vincent Mathieu, Victor I. Mokeev, Alessandro Pilloni, Adam P. Szczepaniak. 2018-01-30. Studying the Pc(4450) resonance in J/psi photoproduction off protons. https://doi.org/10.1007/s00601-018-1426-3

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