Elliptic flow of charged particles in Pb-Pb collisions at sqrt[S(NN)] = 2.76 TeV.

Abstract

We report the first measurement of charged particle elliptic flow in Pb-Pb collisions at sqrt[S(NN)] =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<p t<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 p t reaches a maximum of 0.2 near p t =3 GeV/c. Compared to RHIC Au-Au collisions at sqrt[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.

Cite this paper

@article{Aamodt2010EllipticFO, title={Elliptic flow of charged particles in Pb-Pb collisions at sqrt[S(NN)] = 2.76 TeV.}, author={Kenneth Aamodt and Betty I. Abelev and Arian Abrahantes Quintana and D. Adamova and Andrew Adare and Madan M. Aggarwal and G. Aglieri Rinella and A. G. Agocs and Sergio Salazar and Zubayer Ahammed and A Ahmad Masoodi and N. Ahmad and Sang Un Ahn and A. N. Akindinov and Dobrin Aleksandrov and B . Alessandro and Rafael A. Molina and Aysel Alici and A. Alkin and E Almar{\'a}z Avi{\~n}a and T. Alt and V. Altini and S. Altinpinar and I. Altsybeev and Claudiu Andrei and Anton Andronic and V. Anguelov and C . D . Anson and T . Anticic and F R Antinori and Pietro Antonioli and L . Aphecetche and Harald Appelsh{\"a}user and Nicolas Arbor and S . Arcelli and Andrew B Arend and N{\'e}stor Armesto and Roberta Arnaldi and Thomas Aronsson and I. Arsene and A. B. Asryan and Albert Augustinus and Ralf Averbeck and Terry C. 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