Temperature-dependent cross sections for charmonium dissociation in collisions with pions andρmesons in hadronic matter

Abstract

Meson-charmonium dissociation reactions governed by the quark interchange are studied with temperaturedependent quark potentials. Quark-antiquark relative-motion wave functions and masses of charmonia and charmed mesons are determined by the central spin-independent part of the potentials or by the central spinindependent part and a smeared spin-spin interaction. The prominent temperature dependence of the masses is found. Based on the potentials, the wave functions, and the meson masses, we obtain temperature-dependent cross sections for the fifteen dissociation reactions: πJ /ψ →D . The numerical cross sections are parametrized for future applications in hadronic matter. The particular temperature dependence of the J /ψ bound state leads to unusual behavior of the cross sections for endothermic J /ψ dissociation reactions. The quantum numbers of ψ and χ c cannot make their difference in mass in the temperature region 0.6T c T < T c but can make the ψ dissociation different from the χ c dissociation.

Properties of open and hidden charm mesons in light quark matter

“…Previous studies about J/ψ-hadron interaction at finite temperature broadly fall into two categories: interactions based on chiral Lagrangians [10][11][12][13] and quark model calculations [14][15][16][17]. Zhao and Rapp [18] use thermal lattice QCD to constrain the in-medium charmonium properties in order to calculate spectral functions of the J/ψ.…”

Quarkonium interactions with (hot) hadronic matter

“…The evaluation performed above has taken into account the bottomonium dissociation reactions in vacuum, which is principle useful in the estimation of the ϒ suppression in nucleus-nucleus collisions. However, several studies pointed out that hadrons have their masses affected by the medium, in particular those relevant in heavy-ion-collision phenomena [45,[53][54][55][56][57]. In this sense, we perform a brief analysis of finite-temperature effects on the ϒ X -absorption cross sections.…”

“…We are aware of the possible controversies on this choice of parametrization (see for example discussions in Refs. [53][54][55][56]56,57], and the particular case of pion in [59][60][61]). But our point here is to estimate the modifications of the threshold effects contained in the schannel unitarity loop functions, caused by the shifts of the thermal masses.…”

Properties of J/psi in light quark matter

“…Previous studies on this subject broadly fall into two categories: interactions based on chiral Lagrangians [1,2,3,4] and quark model calculations [5,6,7,8]. Zhao and Rapp [9] use thermal lattice QCD to constrain the in-medium charmonium properties in order to calculate spectral functions of the J/ψ.…”