Formation and Evolution of Quark-Gluon Plasma at RHIC and LHC
K. J. Eskola
Abstract
Initial conditions for quark-gluon plasma formation at τ=0.1 are considered in lowest order perturbative QCD. Chemical composition, thermalization of the formed semihard quark-gluon system and especially implications of the new HERA parton distributions with the enhancement at small x are studied. The plasma at τ=0.1 is shown to be strongly gluon dominated both at RHIC and LHC, and a possibility for rapid thermalization of gluons at LHC is pointed out. Uncertainties in the calculations, particularly shadowing corrections to the parton distributions, are discussed. Free streaming and ideal hydro limits for the evolution of the gluonic plasma with the calculated minijet initial conditions are demonstrated, and a lower limit for final multiplicities obtained for the LHC nuclear collisions.
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