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Measurement of the pseudorapidity and transverse momentum dependence of the elliptic flow of charged particles in lead–lead collisions at √sNN = 2.76 TeV with the ATLAS detector

Author(s)
Taylor, Frank E.
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Abstract
This Letter describes the measurement of elliptic flow of charged particles in lead–lead collisions at √s[subscript NN]=2.76 TeV using the ATLAS detector at the Large Hadron Collider (LHC). The results are based on an integrated luminosity of approximately 7 μb[superscript −1]. Elliptic flow is measured over a wide region in pseudorapidity, |η|<2.5|, and over a broad range in transverse momentum, 0.5<pT<20 GeV. The elliptic flow parameter v2 is obtained by correlating individual tracks with the event plane measured using energy deposited in the forward calorimeters. As a function of transverse momentum, v2(pT) reaches a maximum at pT of about 3 GeV, then decreases and becomes weakly dependent on pT above 7–8 GeV. Over the measured pseudorapidity region, v2 is found to be only weakly dependent on η, with less variation than observed at lower beam energies. The results are discussed in the context of previous measurements at lower collision energies, as well as recent results from the LHC.
Date issued
2012-02
URI
http://hdl.handle.net/1721.1/92036
Department
Massachusetts Institute of Technology. Department of Physics
Journal
Physics Letters B
Publisher
Elsevier B.V.
Citation
Aad, G., B. Abbott, J. Abdallah, A.A. Abdelalim, A. Abdesselam, O. Abdinov, B. Abi, et al. “Measurement of the Pseudorapidity and Transverse Momentum Dependence of the Elliptic Flow of Charged Particles in Lead–lead Collisions at √s[subscript NN] = 2.76 TeV with the ATLAS Detector.” Physics Letters B 707, no. 3–4 (February 2012): 330–348.
Version: Final published version
ISSN
03702693

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