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

By A. K. Chaudhuri and Victor Roy

Abstract

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.Comment: Final version published in Phys. Rev. C. 4 pages, 3 figure

Topics: Nuclear Theory, High Energy Physics - Phenomenology
Year: 2011
DOI identifier: 10.1103/PhysRevC.84.027902
OAI identifier: oai:arXiv.org:1102.4936
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