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

LEA, RAMONA;RUI, RINALDO;
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.
2010
Esperti anonimi
Inglese
STAMPA
105/2010
252302-1
252302-11
ALICE; elliptic flow; Pb
http://prl.aps.org/abstract/PRL/v105/i25/e252302
1014
info:eu-repo/semantics/article
262
K., Aamodt; 1 B., Abelev; 2 A., Abrahantes Quintana; 3 D., Adamova ́; 4 A. M., Adare; 5 M. M., Aggarwal; 6 G., Aglieri Rinella; 7 A. G., Agocs; 8 S., ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11379/537438
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