Higher Harmonic Anisotropic Flow Measurements of Charged Particles in Pb-Pb Collisions at sqrt{SNN}=2.76 TeV

Collaboration Alice , K Aamodt , B Abelev , A Abrahantes , D Adamova , Tomasz Traczyk

Abstract

We report on the first measurement of the triangular v3, quadrangular v4, and pentagonal v5 charged particle flow in Pb-Pb collisions at sNN−−−√=2.76  TeV measured with the ALICE detector at the CERN Large Hadron Collider. We show that the triangular flow can be described in terms of the initial spatial anisotropy and its fluctuations, which provides strong constraints on its origin. In the most central events, where the elliptic flow v2 and v3 have similar magnitude, a double peaked structure in the two-particle azimuthal correlations is observed, which is often interpreted as a Mach cone response to fast partons. We show that this structure can be naturally explained from the measured anisotropic flow Fourier coefficients.
Author Collaboration Alice
Collaboration Alice,,
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, K Aamodt - [Universitetet i Bergen]
K Aamodt,,
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, B Abelev - [Lawrence Livermore National Laboratory]
B Abelev,,
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, A Abrahantes
A Abrahantes,,
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, D Adamova - [Nuclear Physics Institute of the Academy of Sciences of the Czech Republic v. v. i.]
D Adamova,,
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, Tomasz Traczyk (FEIT / AK)
Tomasz Traczyk,,
- The Institute of Control and Computation Engineering
Total number of authors944
Journal seriesPhysical Review Letters, (A 45 pkt)
Issue year2011
VolPRL 107
No032301 (2011)
Pages1-10
ASJC Classification3100 General Physics and Astronomy
DOIDOI:10.1103/PhysRevLett.107.032301
URL http://prl.aps.org/pdf/PRL/v107/i3/e032301
Languageen angielski
Score (nominal)45
Score sourcejournalList
Publication indicators Scopus Citations = 367; Scopus SNIP (Source Normalised Impact per Paper): 2011 = 2.905; WoS Impact Factor: 2011 = 7.37 (2) - 2011=7.013 (5)
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