Regarding the possibility to observe the LHCb hidden-charm strange pentaquark Pcs(4459)0 in antikaon-induced J/? meson production on protons and nuclei near the J/?? production threshold

We study the near-threshold J/psi meson production on protons and nuclei by considering incoherent direct non-resonant K(-)p ->& nbsp;J/psi boolean AND and two-step resonant K(-)p ->& nbsp;P-cs(4459)(0)& nbsp;->& nbsp;J/psi boolean AND & nbsp;charmonium production processes. We calculate the absolute excitation functions, energy and momentum distributions for the non-resonant, resonant and for the combined (non-resonant plus resonant) production of J/psi mesons off protons as well as off carbon and tungsten target nuclei at near-threshold incident antikaon energies by considering these elementary production channels as well as by assuming the spin-parity assignment of the hidden-charm resonance P-cs(4459)(0) with strangeness as JP = (3/2)(-) within six different scenarios for the branching ratio Br[P-cs(4459)(0)& nbsp;->& nbsp;J/psi boolean AND] of the decay P-cs(4459)(0) ->& nbsp;J/psi boolean AND. We show that the combined observables considered reveal definite sensitivity to these scenarios, which means that they may be an important tool to provide further evidence for the existence of the pentaquark P-cs(4459)(0) resonance and to get valuable information on its decay rate to the J/psi boolean AND final state. Their measurements could be performed in the future at the J-PARC Hadron Experimental Facility. (C)& nbsp;2022 Elsevier B.V. All rights reserved.

Automated summary

This study investigates the production of J/psi mesons on protons and nuclei, considering different production processes and branching ratio assumptions. The results show that the combined observables considered are sensitive to the assumptions, which could provide important evidence for the existence of the P-cs(4459)(0) resonance and its decay rate to the J/psi and final state.