Dissociation of heavy quarkonium in hot QCD medium in a quasiparticle model

Abstract

Following a recent work on the effective description of the equations of state for hot QCD obtained from a Hard thermal loop expression for the gluon self-energy, in terms of the quasi-gluons and quasiquark/anti-quarks with respective effective fugacities, the dissociation process of heavy quarkonium in hot QCD medium has been investigated. This has been done by investigating the medium modification to a heavy quark potential. The medium modified potential has a quite different form (a long range Coulomb tail in addition to the usual Yukawa term) in contrast to the usual picture of Debye screening. The flavor dependence of the binding energies of the heavy quarkonia states and the dissociation temperature have been obtained by employing the debye mass for pure gluonic and full QCD case computed employing the quasi-particle picture. Thus estimated dissociation patterns of the charmonium and bottomonium states, considering Debye mass from different approaches in pure gluonic case and full QCD, have shown good agreement with the other potential model studies. 24.85.+p; 12.38.Mh PACS

Collective excitations of a hot anisotropic QCD medium with the Bhatnagar-Gross-Krook collisional kernel within an effective description

“…Further, thermal conductivity has also been considered, in addition to the viscosities [40], again within the effective mass model along with electrical conductivity parameter for the QGP [45], within EQPM by Mitra and Chandra [41] estimated the electrical conductivity and charge diffusion coefficients employing EQPM. The EQPM has also been applied to study heavy-quark transport in isotropic [46] and anisotropic hot QCD medium [47] along with quarkonia in hot QCD medium [48,49] and dileptons in the QGP medium [50,51]. An important point to be noted here is that the above models calculations were not able to correctly reproduce the η and ζ that are phenomenologically extracted from the hydrodynamic simulations of the QGP [3,4], consistently agreeing with different experimental observables at RHIC.…”

Analytic solution of multi-dimensional Schrödinger equation in hot and dense QCD media using the SUSYQM method

“…Thus, the solution of the Schrödinger equation at finite temperature is a good tool for this target. The quarkonium properties have been studied by modifying both the Coulombic and string terms of the heavy quark potential using the perturbative hard thermal loop (HTL) dielectric permittivity in both the isotropic and anisotropic media in the static [38][39][40][41][42][43][44][45][46].…”

Dissociation of Quarkonium in Hot and Dense Media in an Anisotropic Plasma in the Nonrelativistic Quark Model

“…Recently, the quarkonium properties have been studied by modifying both the Coulombic and string terms of the heavy-quark potential using the perturbative hard thermal loop (HTL) dielectric permittivity in both the isotropic and anisotropic media in the static [24][25][26][27][28] and in the moving media [29]. Many attempts have been suggested to calculate the dissociation temperatures of quarkonium states in the deconfined medium by applying the lattice calculations of quarkonium spectral functions [30][31][32][33] or nonrelativistic calculations which depend on some effective (screened) potentials [34][35][36][37][38][39] in an isotropic medium.…”