Measurement of the centrality and pseudorapidity dependence of the integrated elliptic flow in lead-lead collisions at $\sqrt{s_{\mathrm {NN}}}=2.76$ TeV with the ATLAS detector

Philip James Clark, Victoria Jane Martin, Corrinne Mills, Atlas Collaboration

Research output: Contribution to journalArticlepeer-review

Abstract

The integrated elliptic flow of charged particles produced in Pb+Pb collisions at $\sqrt{{s}_{\mathrm {NN}}}=2.76$ TeV has been measured with the ATLAS detector using data collected at the Large Hadron Collider. The anisotropy parameter, $v_2$ , was measured in the pseudorapidity range $|\eta |\le 2.5$ with the event-plane method. In order to include tracks with very low transverse momentum $p_{\mathrm {T}}$ , thus reducing the uncertainty in $v_2$ integrated over $p_{\mathrm {T}}$ , a $1~\mu \hbox {b}^{-1}$ data sample recorded without a magnetic field in the tracking detectors is used. The centrality dependence of the integrated $v_2$ is compared to other measurements obtained with higher $p_{\mathrm {T}}$ thresholds. The integrated elliptic flow is weakly decreasing with $|\eta |$ . The integrated $v_2$ transformed to the rest frame of one of the colliding nuclei is compared to the lower-energy RHIC data.
Original languageEnglish
Article numberAad:2014eoa
Pages (from-to)2982
JournalEuropean Physical Journal C
VolumeC74
Issue number8
DOIs
Publication statusPublished - 13 Aug 2014

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