Observation of Charmonium Mass Modification in Proton Induced Reactions

Abstract

We study the excitation function of the low-lying charmonium state: Ψ(3686) in p Au collisions taking into account their in-medium propagation. The time evolution of the spectral functions of the charmonium state is studied with a BUU type transport model. We calculated the charmonium contribution to the dilepton spectrum and show that for Ψ(3686) production there is a good chance to observe its in-medium modification with good resolution detectors. The energy regime will be available in JPARC.