Fluid dynamics with saturated minijet initial conditions in ultrarelativistic heavy-ion collisions

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• 作者：R. Paatelainen^a ; ^b ; K.J. Eskola^a ; ^b ; H. Niemi^a ; ^b ; ; K. Tuominen^c ; ^b
• 刊名：Physics Letters B
• 出版年：4 April, 2014
• 年：2014
• 卷：731
• 期：Complete
• 页码：126-130
• 全文大小：808 K

文摘

Using next-to-leading order perturbative QCD and a conjecture of saturation to suppress the production of low-energy partons, we calculate the initial energy densities and formation times for the dissipative fluid dynamical evolution of the quark-gluon plasma produced in ultrarelativistic heavy-ion collisions. We identify the model uncertainties and demonstrate the predictive power of the approach by a good global agreement with the measured centrality dependence of charged particle multiplicities, transverse momentum spectra and elliptic flow simultaneously for the Pb+Pb collisions at the LHC and Au+Au at RHIC. In particular, the shear viscosity in the different phases of QCD matter is constrained in this new model simultaneously by all these data.