Speaker
Atsushi Hosaka
Description
This is an attempt to extract J/psi-N interaction from the decay of psi(2S) via two pion emission. The diagonal matrix element of the 2-pion source J/psi to J/psi is related to the transition matrix element of psi(2S) to J/psi which can be extracted by the known experimental data. A naive estimate implies that there is non-negligible strength for the J/psi-2pion coupling, which would provide a hint to resolve the discrepancy in the J/pi-N interaction; very small strength from the J/psi photoproduction and some finite strength from the HAL lattice simulation.