(Non)-perturbative properties of high-T QCD from lattice ... - Physics
(Non)-perturbative properties of high-T QCD from lattice ... - Physics
(Non)-perturbative properties of high-T QCD from lattice ... - Physics
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(2+1)-flavor <strong>QCD</strong>: ...towards the cont. limit (N τ = 8)with light quarks (m π ≃ 220 MeV)980.4 0.6 0.8 1.0 1.2Tr 04.54.00.8 1.0 1.2 1.4 1.6 1.8(ε-3p)/T 4Tr 07654(ε-3p)/T 4 asqtad: N τ =68p4: N τ =683.53.02.52.0p4: N τ =468asqtad: N τ =68321.51.0hot<strong>QCD</strong>preliminary1T [MeV]0100 150 200 250 300 350 400 450 500 550trace anomaly0.50.0T [MeV]300 400 500 600 700 800<strong>high</strong>-T behaviornon-conformal:[(ǫ − 3p)/T 4 ] max ≃ (6 − 7)at T max ≃ 200 MeV(∼ s<strong>of</strong>test point <strong>of</strong> EoS)some cut-<strong>of</strong>f effects in the peak region;p4 and asqtad agreeT> ∼300 MeV: good agreement betweenN τ = 6 and 8 resultsnon-<strong>perturbative</strong>:(ǫ − 3p)/T 4 ∼ A/T 2 + B/T 4for 1.5T c < ∼T< ∼4T cF. Karsch, x<strong>QCD</strong>, July 2008 – p. 15/32
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