Measurement of elliptic and higher order flow from ATLAS experiment at the LHC - INSPIRE

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Measurement of elliptic and higher order flow from ATLAS experiment at the LHC

ATLAS

Collaboration

•

Jiangyong Jia
(
- SUNY, Stony Brook, Chem. Dept. and
- Brookhaven
)

for the collaboration.

Jul, 2011

9 pages

Part of Quark matter. Proceedings, 22nd International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions, Quark Matter 2011, Annecy, France, May 23-28, 2011

Published in:

J.Phys.G 38 (2011) 124012

Contribution to:

- Quark Matter 2011

e-Print:

1107.1468 [nucl-ex]

DOI:

10.1088/0954-3899/38/12/124012

Experiments:

CERN-LHC-ATLAS

View in:

reference search64 citations

Citations per year

Abstract: (arXiv)

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 \pT,

\eta

and centrality, and they are found to be consistent between the two methods in the transverse momentum region \pT<3-4 GeV. This suggests that the measured

v_2-v_6

obtained from two-particle correlations at low \pT 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.

Note:

Proceedings of plenary talk at the XXII International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions, Quark Matter 2011, Annecy

angular distribution: anisotropy
correlation: two-particle
geometry: fluctuation
jet: fragmentation
hadron: production
resonance: decay
quark: matter
gap
transverse momentum
nucleus nucleus

References(17)

Figures(16)

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•
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•
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)
,
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(
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)

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•
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•
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(
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,
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(
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•
e-Print:
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•
DOI:
- 10.1088/0954-3899/38/12/124039

Suppression of Charged Particle Production at Large Transverse Momentum in Central Pb-Pb Collisions at $\sqrt{s_{NN}} =$ 2.76 TeV

ALICE

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•

K. Aamodt
(
- Bergen U.
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•
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•
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•
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(
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)
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Ulrich W. Heinz
(
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)

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•
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