(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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F. Karsch, x<strong>QCD</strong>, July 2008 – p. 28/32Deconfinement and χ-symmetryThe chiral phase transition (i.e. at m q = 0) is deconfiningtrue in <strong>QCD</strong>, i.e. SU(3) + fermions in the fundamentalrepresentationSU(3) + fermions in the adjoint representation: T deconf < T χThe transition in <strong>QCD</strong> with physical quark masses is a crossoverIn which sense is the transitiondeconfining and chiral symmetry restoring?deconfinement: heavy hadrons ⇒ light quarks and gluons;liberation <strong>of</strong> many new light degrees <strong>of</strong> freedom⇒ rapid change in ǫ/T 4 , s/T 3 , ....chiral symmetry restoration: vanishing mass splittings,no new degrees <strong>of</strong> freedom⇒ minor effect on bulk thermodynamics, butrapid change <strong>of</strong> chiral condensate
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