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Title: Studying the $$P_c(4450)$$ Resonance in $$J/\psi $$ Photoproduction Off Protons

Here, the LHCb has reported the observation of a resonancelike structure, the $$P_c(4450)$$, 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 $$P_c(4450)$$ signal in future JLab data. We present a first estimate of the upper limit for the branching ratio of the $$P_c(4450)$$ 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 $$P_c(4450)$$ structure in the future photoproduction experiments.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [4] ; ORCiD logo [4] ;  [5]
  1. Johannes Gutenberg Univ., Mainz (Germany)
  2. Univ. Nacional Autonoma de Mexico, Mexico City (Mexico)
  3. Indiana Univ., Bloomington, IN (United States)
  4. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  5. Indiana Univ., Bloomington, IN (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Publication Date:
Report Number(s):
JLAB-THY-18-2698; DOE/OR/23177-4505; arXiv:1801.10211
Journal ID: ISSN 0177-7963; PII: 1426
Grant/Contract Number:
AC05-06OR23177
Type:
Accepted Manuscript
Journal Name:
Few-Body Systems
Additional Journal Information:
Journal Volume: 59; Journal Issue: 5; Journal ID: ISSN 0177-7963
Publisher:
Springer
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS
OSTI Identifier:
1462042