Collective excitations of hot QCD medium in a quasi-particle description

Abstract

Collective excitations of a hot QCD medium are the main focus of the present article. The analysis is performed within semi-classical transport theory with isotropic and anisotropic momentum distribution functions for the gluonic and quark-antiquark degrees of freedom that constitutes the hot QCD plasma. The isotropic/equilibrium momentum distributions for gluons and quarks are based on a recent quasi-particle description of hot QCD equations of state. The anisotropic distributions are just the extensions of isotropic ones by stretching or squeezing them in one of the directions. The hot QCD medium effects in the model adopted here enter through the effective gluon and quark fugacities along with non-trivial dispersion relations leading to an effective QCD coupling constant. Interestingly, with these distribution functions the tensorial structure of the gluon polarization tensor in the medium turned out to be similar to the one for the non-interacting ultra-relativistic system of quarks/antiquarks and gluons . The interactions mainly modify the Debye mass parameter and , in turn, the effective coupling in the medium. These modifications have been seen to modify the collective modes of the hot QCD plasma in a significant way.

15 pages, 11 figures, two column

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Cited by in corpus (19)

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• Thermoelectric properties of (an-)isotropic QGP in magnetic fields
• Thermomagnetic properties and Debye Screening for magnetized quark-gluon Plasma using the extended self-consistent quasiparticle model
• Liénard-Wiechert potential of a heavy quark moving in QGP medium
• Energy loss of a fast moving parton in Gribov-Zwanziger plasma
• Energy loss of heavy quarks in the presence of magnetic field
• Quarkonia dissociation at finite magnetic field in the presence of momentum anisotropy
• Impact of Medium Anisotropy on Quarkonium Dissociation and Regeneration
• Collective modes of gluons in an anisotropic thermo-magnetic medium
• Study of the heavy quarks energy loss through medium polarization, elastic collision and radiative processes
• Electromagnetic propagation in a relativistic electron gas at finite temperatures
• Collective modes in the anisotropic collisional hot QCD medium at finite chemical potential
• Melting of heavy quarkonia in QGP using deep neural networks
• Anisotropy effects on heavy quark dynamics in Gribov modified gluon plasma
• Nonextensive quasiparticle description of QCD matter
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