Hydrodynamical analysis of centrality dependence of charged particle's multiplicity in $\sqrt{s}_{NN}$=2.76 TeV Pb+Pb collisions

Details Hydrodynamical analysis of centrality dependence of charged particle's multiplicity in $\sqrt{s}_{NN}$=2.76 TeV Pb+Pb collisions Hydrodynamical analysis of centrality dependence of charged particle's multiplicity in $\sqrt{s}_{NN}$=2.76 TeV Pb+Pb collisions

2011-02-24

arxiv.org/abs/1102.4936v4

Phys.Rev.C84:027902,2011

Physics

Nuclear Physics

Nuclear Theory

Final version published in Phys. Rev. C. 4 pages, 3 figures

Scientific paper

10.1103/PhysRevC.84.027902

In Israel-Stewart's theory of dissipative hydrodynamics, we have analyzed the recent ALICE data for the centrality dependence of charged particle multiplicity, centrality dependence of integrated elliptic flow and 0-5% charged particles $p_T$ spectra in $\sqrt{s}_{NN}$=2.76 TeV Pb+Pb collisions and determined the initial or the thermalisation time. Analysis indicate that the ALICE data disfavor very early thermalsiation $\tau_i$=0.2 fm, or very late thermalsation $\tau_i$= 4fm. Data are best explained for thermalisation time $\tau_i=0.88^{-0.14}_{+0.68}$ fm.

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