Elliptic flow of charged particles in Pb-Pb collisions at √sNN=2.76 TeV

Aamodt, K. ; Sinha, B. C. ; et., al (2010) Elliptic flow of charged particles in Pb-Pb collisions at √sNN=2.76 TeV Physical Review Letters, 105 (25). 252302_1-252302_11. ISSN 0031-9007

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Official URL: http://prl.aps.org/abstract/PRL/v105/i25/e252302

Related URL: http://dx.doi.org/10.1103/PhysRevLett.105.252302


We report the first measurement of charged particle elliptic flow in Pb-Pb collisions at √sNN=2.76 TeV with the ALICE detector at the CERN Large Hadron Collider. The measurement is performed in the central pseudorapidity region (|η| < 0.8) and transverse momentum range 0.2 < pt < 5.0 GeV/c. The elliptic flow signal v2, measured using the 4-particle correlation method, averaged over transverse momentum and pseudorapidity is 0.087±0.002(stat)±0.003(syst) in the 40%-50% centrality class. The differential elliptic flow v2(pt) reaches a maximum of 0.2 near pt=3 GeV/c. Compared to RHIC Au-Au collisions at √sNN=200 GeV, the elliptic flow increases by about 30%. Some hydrodynamic model predictions which include viscous corrections are in agreement with the observed increase.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:70331
Deposited On:21 Nov 2011 09:13
Last Modified:21 Nov 2011 09:13

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