Elliptic Flow of Charged Particles in Pb-Pb Collisions at sNN = 2.76 TeV
Journal Article
·
· Physical Review Letters
- University of Oslo, Norway
- ORNL
We report the first measurement of charged particle elliptic flow in Pb-Pb collisions at 2.76 TeV with the ALICE detector at the CERN Large Hadron Collider. The measurement is performed in the central pseudorapidity region (|{eta}| < 0.8) and transverse momentum range 0.2 < p{sub t} < 5.0 GeV/c. The elliptic flow signal v{sub 2}, measured using the 4-particle correlation method, averaged over transverse momentum and pseudorapidity is 0.087 {+-} 0.0002 (stat) {+-}0.002 (stat.) {+-} 0.004 (syst.) in the 40--50% centrality class. The differential elliptic flow v{sub 2}(p{sub t}) reaches a maximum of 0.2 near p{sub t} = 3 GeV/c. Compared to RHIC Au-Au collisions at 200 GeV, the elliptic flow increases by about 30%. Some hydrodynamic model predictions which include viscous corrections are in agreement with the observed increase.
- Research Organization:
- Oak Ridge National Laboratory (ORNL)
- Sponsoring Organization:
- SC USDOE - Office of Science (SC)
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1006478
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 25 Vol. 105; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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