We report the first measurement of charged particle elliptic flow in Pb-Pb collisions at root s(NN) p = 2.76 TeV with the ALICE detector at the CERN Large Hadron Collider. The measurement is performed in the central pseudorapidity region (vertical bar eta vertical bar < 0.8) and transverse momentum range 0.2 < p(t) < 5.0 GeV/c. The elliptic flow signal v(2), 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 v(2)(p(t)) reaches a maximum of 0.2 near p(t) = 3 GeV/c. Compared to RHIC Au-Au collisions at root s(NN) = 200 GeV, the elliptic flow increases by about 30%. Some hydrodynamic model predictions which include viscous corrections are in agreement with the observed increase.

Elliptic Flow of Charged Particles in Pb-Pb Collisions at root s(NN)=2.76 TeV / K., A., B., A., A. A., Q., D., A., A. M., A., M. M., A., G. A., R., A. G., A., S. A., S., Z., A., A. A., M., N., A., S. U., A., A., A., D., A., B., A., R. A., M., A., A., A., A., E. A., A., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 105:(2010), p. 252302. [10.1103/PhysRevLett.105.252302]

Elliptic Flow of Charged Particles in Pb-Pb Collisions at root s(NN)=2.76 TeV

L. Cunqueiro;MEDDI, Franco;
2010

Abstract

We report the first measurement of charged particle elliptic flow in Pb-Pb collisions at root s(NN) p = 2.76 TeV with the ALICE detector at the CERN Large Hadron Collider. The measurement is performed in the central pseudorapidity region (vertical bar eta vertical bar < 0.8) and transverse momentum range 0.2 < p(t) < 5.0 GeV/c. The elliptic flow signal v(2), 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 v(2)(p(t)) reaches a maximum of 0.2 near p(t) = 3 GeV/c. Compared to RHIC Au-Au collisions at root s(NN) = 200 GeV, the elliptic flow increases by about 30%. Some hydrodynamic model predictions which include viscous corrections are in agreement with the observed increase.
2010
RELATIVISTIC NUCLEAR COLLISIONS; HEAVY-ION COLLISIONS; QUARK-GLUON PLASMA; PLUS AU COLLISIONS; ANISOTROPIC FLOW; COLLABORATION; PERSPECTIVE; MATTER; LIMIT
01 Pubblicazione su rivista::01a Articolo in rivista
Elliptic Flow of Charged Particles in Pb-Pb Collisions at root s(NN)=2.76 TeV / K., A., B., A., A. A., Q., D., A., A. M., A., M. M., A., G. A., R., A. G., A., S. A., S., Z., A., A. A., M., N., A., S. U., A., A., A., D., A., B., A., R. A., M., A., A., A., A., E. A., A., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 105:(2010), p. 252302. [10.1103/PhysRevLett.105.252302]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/500195
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