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) ± 0.004 (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.

Elliptic flow of charged particles in Pb–Pb collisions at √sNN = 2.76 TeV / K., A., 1 B., A., 2 A., A.Q., 3 D., A.́., 4 A. M., A., 5 M. M., A., 6 G., A.R., 7 A. G., A., 8 S., A.S., 9 Z., A., 10 A., A.M., 11 N., A., 11 S. U., A., 12, ., a. A., A., 13 D., A., 14 B., A., 15 R., A.M., 9 A., A., 16, ., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 105/2010:(2010), pp. 252302-1-252302-11. [10.1103/PhysRevLett.105.252302]

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

BREGANT, MARCO;CAMERINI, Paolo;CONTIN, GIACOMO;GROSSO, Raffaele;LEA, RAMONA;MARGAGLIOTTI, GIACOMO;PIANO, STEFANO;RUI, RINALDO;VACCHI, Andrea;VENARUZZO, MASSIMO;
2010-01-01

Abstract

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) ± 0.004 (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.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2305713
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