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  • PhysRevC.86.014907

    Rights statement: Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. ©2012 CERN, for the ATLAS Collaboration

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Measurement of the azimuthal anisotropy for charged particle production in sNN−−−−√=2.76 TeV lead-lead collisions with the ATLAS detector

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Measurement of the azimuthal anisotropy for charged particle production in sNN−−−−√=2.76 TeV lead-lead collisions with the ATLAS detector. / The ATLAS collaboration.

In: Physical Review C, Vol. 86, No. 1, 014907, 24.07.2012.

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@article{0ca10b1ad3ce470a88d13584fc1760f0,
title = "Measurement of the azimuthal anisotropy for charged particle production in sNN−−−−√=2.76 TeV lead-lead collisions with the ATLAS detector",
abstract = "Differential measurements of charged particle azimuthal anisotropy are presented for lead-lead collisions at sNN−−−−√=2.76 TeV with the ATLAS detector at the LHC, based on an integrated luminosity of approximately 8 μb−1. This anisotropy is characterized via a Fourier expansion of the distribution of charged particles in azimuthal angle relative to the reaction plane, with the coefficients vn denoting the magnitude of the anisotropy. Significant v2–v6 values are obtained as a function of transverse momentum (0.52) and one particle with pT<3 GeV, the v2,2–v6,6 values are found to factorize as vn,n(paT,pbT)≈vn(paT)vn(pbT) in central and midcentral events. Such factorization suggests that these values of v2,2–v6,6 are primarily attributable to the response of the created matter to the fluctuations in the geometry of the initial state. A detailed study shows that the v1,1(paT,pbT) data are consistent with the combined contributions from a rapidity-even v1 and global momentum conservation. A two-component fit is used to extract the v1 contribution. The extracted v1 is observed to cross zero at pT≈1.0 GeV, reaches a maximum at 4–5 GeV with a value comparable to that for v3, and decreases at higher pT.",
author = "Adam Barton and Guennadi Borissov and Eva Bouhova-Thacker and Timothy Brodbeck and Alexandre Chilingarov and Ruth Davidson and {de Mora}, Lee and William Dearnaley and Harald Fox and Robert Henderson and Gareth Hughes and Jones, {Roger William Lewis} and Vakhtang Kartvelishvili and Robin Long and Peter Love and Peter Ratoff and Maria Smizanska and James Walder and {The ATLAS collaboration}",
note = "Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. {\textcopyright}2012 CERN, for the ATLAS Collaboration",
year = "2012",
month = jul,
day = "24",
doi = "10.1103/PhysRevC.86.014907",
language = "English",
volume = "86",
journal = "Physical Review C",
issn = "0556-2813",
publisher = "American Physical Society",
number = "1",

}

RIS

TY - JOUR

T1 - Measurement of the azimuthal anisotropy for charged particle production in sNN−−−−√=2.76 TeV lead-lead collisions with the ATLAS detector

AU - Barton, Adam

AU - Borissov, Guennadi

AU - Bouhova-Thacker, Eva

AU - Brodbeck, Timothy

AU - Chilingarov, Alexandre

AU - Davidson, Ruth

AU - de Mora, Lee

AU - Dearnaley, William

AU - Fox, Harald

AU - Henderson, Robert

AU - Hughes, Gareth

AU - Jones, Roger William Lewis

AU - Kartvelishvili, Vakhtang

AU - Long, Robin

AU - Love, Peter

AU - Ratoff, Peter

AU - Smizanska, Maria

AU - Walder, James

AU - The ATLAS collaboration

N1 - Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. ©2012 CERN, for the ATLAS Collaboration

PY - 2012/7/24

Y1 - 2012/7/24

N2 - Differential measurements of charged particle azimuthal anisotropy are presented for lead-lead collisions at sNN−−−−√=2.76 TeV with the ATLAS detector at the LHC, based on an integrated luminosity of approximately 8 μb−1. This anisotropy is characterized via a Fourier expansion of the distribution of charged particles in azimuthal angle relative to the reaction plane, with the coefficients vn denoting the magnitude of the anisotropy. Significant v2–v6 values are obtained as a function of transverse momentum (0.52) and one particle with pT<3 GeV, the v2,2–v6,6 values are found to factorize as vn,n(paT,pbT)≈vn(paT)vn(pbT) in central and midcentral events. Such factorization suggests that these values of v2,2–v6,6 are primarily attributable to the response of the created matter to the fluctuations in the geometry of the initial state. A detailed study shows that the v1,1(paT,pbT) data are consistent with the combined contributions from a rapidity-even v1 and global momentum conservation. A two-component fit is used to extract the v1 contribution. The extracted v1 is observed to cross zero at pT≈1.0 GeV, reaches a maximum at 4–5 GeV with a value comparable to that for v3, and decreases at higher pT.

AB - Differential measurements of charged particle azimuthal anisotropy are presented for lead-lead collisions at sNN−−−−√=2.76 TeV with the ATLAS detector at the LHC, based on an integrated luminosity of approximately 8 μb−1. This anisotropy is characterized via a Fourier expansion of the distribution of charged particles in azimuthal angle relative to the reaction plane, with the coefficients vn denoting the magnitude of the anisotropy. Significant v2–v6 values are obtained as a function of transverse momentum (0.52) and one particle with pT<3 GeV, the v2,2–v6,6 values are found to factorize as vn,n(paT,pbT)≈vn(paT)vn(pbT) in central and midcentral events. Such factorization suggests that these values of v2,2–v6,6 are primarily attributable to the response of the created matter to the fluctuations in the geometry of the initial state. A detailed study shows that the v1,1(paT,pbT) data are consistent with the combined contributions from a rapidity-even v1 and global momentum conservation. A two-component fit is used to extract the v1 contribution. The extracted v1 is observed to cross zero at pT≈1.0 GeV, reaches a maximum at 4–5 GeV with a value comparable to that for v3, and decreases at higher pT.

U2 - 10.1103/PhysRevC.86.014907

DO - 10.1103/PhysRevC.86.014907

M3 - Journal article

VL - 86

JO - Physical Review C

JF - Physical Review C

SN - 0556-2813

IS - 1

M1 - 014907

ER -