| ATLAS Note | |
| Report number | arXiv:1107.1468 |
| Title | Measurement of elliptic and higher order flow from ATLAS experiment at the LHC |
| Author(s) | Jia, Jiangyong (SUNY, Stony Brook, Chem. Dept. ; Brookhaven) |
| Collaboration | for the ATLAS collaboration |
| Publication | 2011 |
| Imprint | 07 Jul 2011 |
| Number of pages | 9 |
| Note | Proceedings of plenary talk at the XXII International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions, Quark Matter 2011, Annecy |
| In: | J. Phys. G 38 (2011) 124012 |
| In: | 22nd international conference on ultrarelativistic nucleus-nucleus collisions, Annecy, France, 23 - 28 May 2011, pp.124012 |
| DOI | 10.1088/0954-3899/38/12/124012 |
| Subject category | Detectors and Experimental Techniques ; Nuclear Physics - Experiment |
| Accelerator/Facility, Experiment | CERN LHC ; ATLAS |
| Free keywords | elliptic flow ; higher order flow ; v_{n} ; medium response ; geometry fluctuation ; viscosity ; HEAVYIONS |
| Abstract | We present a differential measurement of the azimuthal anisotropy of charged hadron production in Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}$=2.76 TeV. This azimuthal anisotropy is expanded into a Fourier series in azimuthal angle, where the coefficient for each term, $v_n$, characterizes the magnitude of the anisotropy at a particular angular scale. We extract $v_2-v_6$ via a discrete Fourier analysis of the two-particle $\Delta\phi-\Delta\eta$ correlation with a large $\Delta\eta$ gap ($|\Delta\eta|>2$), and via an event plane method based on the Forward Calorimeter. Significant $v_2-v_6$ values are observed over a broad range in $p_T$, $eta$ and centrality, and they are found to be consistent between the two methods in the transverse momentum region $p_T<3-4$ GeV. This suggests that the measured $v_2-v_6$ obtained from two-particle correlations at low $p_T$ with a large $\Delta\eta$ gap are consistent with the collective response of the system to the initial state geometry fluctuations, and is not the result of jet fragmentation or resonance decay. |
| Copyright/License | arXiv nonexclusive-distrib. 1.0 Preprint: (License: CC-BY-4.0) |
Corresponding record in: Inspire
记录创建於2011-07-07，最後更新在2021-05-03