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Title: Formation of hidden-charm pentaquarks in photon-nucleon collisions

The cross section for formation in γ + ρ collisions of the recently found hidden-charm pentaquark states Ρc(4380) and Ρc(4450) is discussed and estimated. The studies of these resonances in photon beam experiments can be complementary to those in the LHCb experiment setting, and may be more advantageous for measurement of their additional decay channels. It is pointed out that both the relative importance of such decays and the yield of the resonances in the γ + ρ collisions are sensitive to the internal dynamics of the pentaquarks and can resolve between theoretical models. Specific numerical estimates are discussed within a simple ‘baryocharmonium’ model, where the the observed Ρc resonances are composites of J/ψ and excited nucleon states with the quantum numbers of Ν(1440) and Ν(1520).
Authors:
 [1] ;  [2]
  1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  2. Univ. of Minnesota, Minneapolis, MN (United States); Institute of Theoretical and Experimental Physics, Moscow (Russia)
Publication Date:
OSTI Identifier:
1214155
Report Number(s):
JLAB-PHY--15-2131; DOE/OR/23177--3524; arXiv:1508.00888
Journal ID: ISSN 1550-7998; PRVDAQ; TRN: US1600858
Grant/Contract Number:
SC0011842; AC05-06OR23177
Type:
Accepted Manuscript
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Volume: 92; Journal Issue: 3; Journal ID: ISSN 1550-7998
Publisher:
American Physical Society (APS)
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE; USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS