Low-energy J/psi-Hadron Interactions from Quenched Lattice QCD

TL;DR

This study uses quenched lattice QCD simulations to calculate low-energy scattering lengths for J/psi interactions with pions, rhos, and nucleons, revealing attractive forces and potential bound states, aiding understanding of J/psi behavior in nuclear matter.

Contribution

First lattice QCD calculation of J/psi-hadron scattering lengths at low energies, providing new insights into their interactions and potential bound states.

Findings

Attractive S-wave interactions for all three systems.

J/psi-nucleon interaction is the most attractive.

Discussion of possible J/psi-nucleon bound state.

Abstract

The J/psi-hadron interaction is a key ingredient in analyzing the J/psi suppression in hot hadronic matter as well as the propagation of J/psi in nuclei. As a first step to clarify the J/psi-hadron interactions at low energies, we have calculated J/psi-pi, J/psi-rho and J/psi-nucleon scattering lengths by the quenched lattice QCD simulations with Wilson fermions for beta=6.2 on 24^3*48 and 32^3*48 lattices. Using the Luscher's method to extract the scattering length from the simulations in a finite box, we find an attractive interaction in the S-wave channel for all three systems: Among others, the J/psi-nucleon interaction is most attractive. Possibility of the J/psi-nucleon bound state is also discussed.