Low-energy J/psi-Hadron Interactions from Quenched Lattice QCD
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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.
6 pages, 6 figures, talk presented at Lattice 2005 (Heavy quark physics), Trinity College, Dublin, Ireland, 25-30 July 2005
6 pages, 6 figures, talk presented at Lattice 2005 (Heavy quark physics), Trinity College, Dublin, Ireland, 25-30 July 2005