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Journal Articles Journal of High Energy Physics Year : 2013

On finite-temperature holographic QCD in the Veneziano limit

Abstract

Holographic models in the T=0 universality class of QCD in the limit of large number N_c of colors and N_f massless fermion flavors, but constant ratio x_f=N_f/N_c, are analyzed at finite temperature. The models contain a 5-dimensional metric and two scalars, a dilaton sourcing TrF^2 and a tachyon dual to \bar qq. The phase structure on the T,x_f plane is computed and various 1st order, 2nd order transitions and crossovers with their chiral symmetry properties are identified. For each x_f, the temperature dependence of p/T^4 and the quark-antiquark -condensate is computed. In the simplest case, we find that for x_f up to the critical x_c\sim 4 there is a 1st order transition on which chiral symmetry is broken and the energy density jumps. In the conformal window x_c

Dates and versions

in2p3-00826109 , version 1 (26-05-2013)

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T. Alho, M. Järvinen, K. Kajantie, E. Kiritsis, K. Tuominen. On finite-temperature holographic QCD in the Veneziano limit. Journal of High Energy Physics, 2013, 2013, pp.93. ⟨10.1007/JHEP01(2013)093⟩. ⟨in2p3-00826109⟩
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