Heavy Quarkonium Dissociation Cross Sections in Relativistic Heavy-Ion Collisions

Abstract

Many of the hadron-hadron cross sections required for the study of the dynamics of matter produced in relativistic heavy-ion collisions can be calculated using the quark-interchange model. Here we evaluate the low-energy dissociation cross sections of $J/\psi$, ${\psi }^{\prime }$, $\chi$, ${\rm Y}$, and ${{\rm Y}}^{\prime }$ in collision with $\pi$, $\rho$, and $K$, which are important for the interpretation of heavy-quarkonium suppression as a signature for the quark gluon plasma. These comover dissociation processes also contribute to heavy-quarkonium suppression, and must be understood and incorporated in simulations of heavy-ion collisions before QGP formation can be established through this signature.

Comments: 38 pages, in LaTex