Charged particleʼs elliptic flow in (2+1)D viscous hydrodynamics at LHC (s=2.76 TeV) energy in Pb+Pb collision

In the Israel–Stewartʼs theory of second order hydrodynamics, we have simulated s=2.76 TeV Pb+Pb collisions. ALICE data for the centrality dependence of charged particles multiplicity, pT spectra in 0–5% collisions, centrality dependence of integrated and differential elliptic flow are analysed. Ana...

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Bibliographic Details
Published in:Physics letters. B 2011-09, Vol.703 (3), p.313-317
Main Authors: Roy, Victor, Chaudhuri, A.K.
Format: Article
Language:English
Subjects:
Charged particles
Collision dynamics
Entropy
Exact sciences and technology
Fluid dynamics
Lead (metal)
Nuclear physics
Physics
Spectra
The physics of elementary particles and fields
Viscosity
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Summary:In the Israel–Stewartʼs theory of second order hydrodynamics, we have simulated s=2.76 TeV Pb+Pb collisions. ALICE data for the centrality dependence of charged particles multiplicity, pT spectra in 0–5% collisions, centrality dependence of integrated and differential elliptic flow are analysed. Analysis indicate that while ALICE data on charged particles multiplicity or pT spectra do not demand any viscosity, viscosity is demanded by the elliptic flow data. From a simultaneous fit to all the data sets, viscosity to entropy ratio in sNN=2.76 TeV Pb+Pb collisions is extracted as, η/s=0.06±0.2.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2011.08.006