Quark-gluon plasma speed of sound in magnetic field
Abstract
A non-perturbative method of Field Correlators (FCM) is applied to study speed of sound in quark-gluon plasma at temperatures above the deconfinement transition 1<T/Tc<3 (Tc=160 MeV) under a uniform magnetic field up to eB ~ 1 GeV2. The speed of sound in Nf=2+1 QCD quark-gluon plasma is found to exceed the conformal limit (1/3) at very large magnetic field strengths eB>0.5 GeV2. At large temperatures, the speed of sound tends to the conformal limit; low-temperature behavior demonstrates inverse magnetic catalysis. The effect of magnetic field on the speed of sound in quark-gluon plasma is found to be negligible in any existing Heavy Ion Collision experiment, including sNN=5.02 TeV Pb-Pb collisions at LHC.
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