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Title: Higher harmonic anisotropic flow measurements of charged particles in Pb-Pb collisions at √ SNN = 2.76 TeV

Abstract

We report on the first measurement of the triangular v 3, quadrangular v 4, and pentagonal v 5 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 v 2 and v 3 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. Here, we show that this structure can be naturally explained from the measured anisotropic flow Fourier coefficients.

Authors:
 [1]
  1. Univ. of Bergen, Bergen (Norway). et al.
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
Contributing Org.:
ALICE Collaboration
OSTI Identifier:
1042843
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 107; Journal Issue: 3; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS

Citation Formats

Aamodt, K. Higher harmonic anisotropic flow measurements of charged particles in Pb-Pb collisions at √SNN = 2.76 TeV. United States: N. p., 2011. Web. doi:10.1103/PhysRevLett.107.032301.
Aamodt, K. Higher harmonic anisotropic flow measurements of charged particles in Pb-Pb collisions at √SNN = 2.76 TeV. United States. doi:10.1103/PhysRevLett.107.032301.
Aamodt, K. Mon . "Higher harmonic anisotropic flow measurements of charged particles in Pb-Pb collisions at √SNN = 2.76 TeV". United States. doi:10.1103/PhysRevLett.107.032301.
@article{osti_1042843,
title = {Higher harmonic anisotropic flow measurements of charged particles in Pb-Pb collisions at √SNN = 2.76 TeV},
author = {Aamodt, K.},
abstractNote = {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. Here, we show that this structure can be naturally explained from the measured anisotropic flow Fourier coefficients.},
doi = {10.1103/PhysRevLett.107.032301},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 3,
volume = 107,
place = {United States},
year = {2011},
month = {7}
}