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Formation of hidden-charm pentaquarks in photon-nucleon collisions

V. Kubarovsky and M. B. Voloshin
Phys. Rev. D 92, 031502(R) – Published 28 August 2015

Abstract

The cross section for formation in γ+p collisions of the recently found hidden-charm pentaquark states Pc(4380) and Pc(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+p 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 observed Pc resonances are composites of J/ψ and excited nucleon states with the quantum numbers of N(1440) and N(1520).

  • Figure
  • Received 14 August 2015

DOI:https://doi.org/10.1103/PhysRevD.92.031502

© 2015 American Physical Society

Authors & Affiliations

V. Kubarovsky1 and M. B. Voloshin2,3,4

  • 1Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
  • 2William I. Fine Theoretical Physics Institute, University of Minnesota, Minneapolis, Minnesota 55455, USA
  • 3School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
  • 4Institute of Theoretical and Experimental Physics, Moscow 117218, Russia

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Issue

Vol. 92, Iss. 3 — 1 August 2015

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