J/ψ-nucleon scattering in P+c pentaquark channels
U. Skerbis* and
S. Prelovsek*: corresponding author
Published on:
May 29, 2019
Abstract
Two pentaquarks P+c were discovered by LHCb collaboration as peaks in the proton-J/ψ invariant mass. We perform the lattice QCD study of the scattering between J/ψ meson and nucleon in the channels with JP=32+,32−,52+,52−, where P+c was discovered. This is the first lattice simulation that reaches the energies 4.3−4.5 GeV where pentaquarks reside. The higher partial waves L>0 are also explored for the first time. In this study, we consider the single-channel approximation for the scattering of NJ/ψ. Energies and eigenstates are extracted for the NJ/ψ system at the zero total momentum for all six irreducible representations of the lattice irreducible representation. No significant energy shifts are observed. The number of eigenstates agrees with the number expected from non-interacting limit for scattering. This could possibly indicate that the Pc resonances seen in an experiment are a consequence of a coupling of the NJ/ψ channel with other two-hadron channels.
DOI: https://doi.org/10.22323/1.334.0087
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