Gluon spectral functions and transport coefficients in Yang--Mills theory

Autor:	Haas, Michael, Fister, Leonard, Pawlowski, Jan M.
Rok vydání:	2013
Předmět:	High Energy Physics - Phenomenology High Energy Physics - Lattice High Energy Physics - Theory
Zdroj:	Phys. Rev. D 90, 091501 (2014)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevD.90.091501
Popis:	We compute non-perturbative gluon spectral functions at finite temperature in quenched QCD with the maximum entropy method. We also provide a closed loop equation for the spectral function of the energy-momentum tensor in terms of the gluon spectral function. This setup is then used for computing the shear viscosity over entropy ratio $\eta/s$ in a temperature range from about $0.4\, T_c$ to $4.5\, T_c$. The ratio $\eta /s$ has a minimum at about $1.25\, T_c$ with the value of about 0.115. We also discuss extensions of the present results to QCD. Comment: 5 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1308.4960 Zobrazit plný text záznamu View this record from Arxiv