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

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 $\mu {\text{b}}^{-1}$ of lead-lead collision data in the 2010 heavy ion run. The full azimuthal acceptance of the ATLAS detector in $\pm 2.5$ 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.

References in corpus (6)

• Measurement of the azimuthal anisotropy for charged particle production in sqrt(s_NN) = 2.76 TeV lead-lead collisions with the ATLAS detector
• Dihadron azimuthal correlations in Au+Au collisions at sqrt(s_NN)=200 GeV
• Event-by-event shape and flow fluctuations of relativistic heavy-ion collision fireballs
• Anisotropic flow in sqrt(s)=2.76 TeV Pb+Pb collisions at the LHC
• Translation of collision geometry fluctuations into momentum anisotropies in relativistic heavy-ion collisions
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Cited by in corpus (2)

• On the origin of long-range azimuthal correlations in hadronic collisions
• Power spectrum of flow fluctuations in relativistic heavy-ion collisions