Transport properties of the hot quark-gluon plasma

Abstract

A phase where quark and gluon are the relevant degrees of freedom is expected for nuclear matter at energy density ǫ ≥ 1 GeV/fm 3 and a temperature T > 160 MeV. A transient state state of such a matter can be created by mean of ultra-relativistic heavy-ion collisions. We briefly overview some main results on the properties of the quark-gluon plasma emphasizing the necessity to develop a transport theory for quarks and gluons able to incorporate the main developments in lattice QCD and perturbative QCD. First results show that Boltzmann-Vlasov transport theory correctly predict the elliptic flow observed at both RHIC and LHC energies.

Comparison of results from a (2+1)-D relativistic viscous hydrodynamic model to elliptic and hexadecapole flow of charged hadrons measured in Au-Au collisions atsNN=200GeV

“…There are two main theoretical approaches to estimate the value of η/s from the experimental data. One based on a microscopic approach as in transport theory [6][7][8][9][10] and other related to a macroscopic approach through relativistic viscous hydrodynamic calculations [11][12][13][14][15][16][17][18]. In this work, we will compare our results from a relativistic 2+1 dimension viscous hydrodynamics to recent high statistics experimental data on elliptic (v 2 ) and hexadecapole (v 4 ) flow of charged hadrons measured by the PHENIX Collaboration [19,20].…”