Higher Harmonic Anisotropic Flow Measurements of Charged Particles in Pb-Pb Collisions at √sNN=2.76  TeV

K. Aamodt; B.I. Abelev; M. Reicher; R.J.M. Snellings; D. Thomas; M. van Leeuwen; M Veldhoen; M. Verweij; Y. Zhou; M. Zynovyev

doi:10.1103/PhysRevLett.107.032301

Higher Harmonic Anisotropic Flow Measurements of Charged Particles in Pb-Pb Collisions at √sNN=2.76 TeV

K. Aamodt, B.I. Abelev, M. Reicher, R.J.M. Snellings, D. Thomas, M. van Leeuwen, M Veldhoen, M. Verweij, Y. Zhou, M. Zynovyev

Subatomic Physics

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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.

Original language	English
Pages (from-to)	032301/1-032301/10
Number of pages	10
Journal	Physical Review Letters
Volume	107
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevLett.107.032301
Publication status	Published - 2011

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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 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 = "K. Aamodt and B.I. Abelev and M. Reicher and R.J.M. Snellings and D. Thomas and {van Leeuwen}, M. and M Veldhoen and M. Verweij and Y. Zhou and M. Zynovyev",

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doi = "10.1103/PhysRevLett.107.032301",

language = "English",

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T1 - Higher Harmonic Anisotropic Flow Measurements of Charged Particles in Pb-Pb Collisions at √sNN=2.76 TeV

AU - Aamodt, K.

AU - Abelev, B.I.

AU - Reicher, M.

AU - Snellings, R.J.M.

AU - Thomas, D.

AU - van Leeuwen, M.

AU - Veldhoen, M

AU - Verweij, M.

AU - Zhou, Y.

AU - Zynovyev, M.

PY - 2011

Y1 - 2011

N2 - 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.

AB - 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.

U2 - 10.1103/PhysRevLett.107.032301

DO - 10.1103/PhysRevLett.107.032301

M3 - Article

SN - 0031-9007

VL - 107

SP - 032301/1-032301/10

JO - Physical Review Letters

JF - Physical Review Letters

IS - 3

ER -

Higher Harmonic Anisotropic Flow Measurements of Charged Particles in Pb-Pb Collisions at √sNN=2.76 TeV

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