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arXiv · 1109.6721

Measurement of elliptic and higher order flow harmonics at $\sqrt{s_{NN}}=2.76$ TeV Pb+Pb collisions with the ATLAS Detector

Soumya Mohapatra
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Abstract

The measurements of flow harmonics $v_2$-$v_6$ using the event plane and two particle correlations methods in broad $p_T$, $\eta$ and centrality ranges using the ATLAS detector at LHC are presented. ATLAS recorded about 9 $\mu \textrm{b}^{-1}$ of lead-lead collision data in the 2010 heavy ion run. The full azimuthal acceptance of the ATLAS detector in $\pm2.5$ units of pseudorapidity for charged hadrons and the large amount of data allows for a detailed study of the flow harmonics. The $p_T$, centrality and $\eta$ ranges where the two methods give consistent $v_n$ and where they disagree are discussed. It is shown that the ridge as well as the so called "mach-cone" seen in two particle correlations are largely accounted for by the collective flow. Some scaling relations in the $p_T$ dependence of the $v_n$ are also discussed.

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Soumya Mohapatra. 2011-09-30. Measurement of elliptic and higher order flow harmonics at $\sqrt{s_{NN}}=2.76$ TeV Pb+Pb collisions with the ATLAS Detector. https://doi.org/10.1088/1742-6596%2F389%2F1%2F012011

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