Azimuthal anisotropy of charged particles at high transverse momenta in Pb-Pb collisions at √s NN=2.76TeV

S Chatrchyan; J. A Brochero Cifuentes; I. J Cabrillo; Alicia Calderon; S. H Chuang; J Duarte Campderros; Marta Felcini; M Fernández; G Gómez; J González Sánchez; C Jorda; P Lobelle Pardo; A López Virto; Jesús Marco; Rafael Marco; Celso Martínez-Rivero; Francisco Matorras; F. J Muñoz Sánchez; Teresa Rodrigo; Ana Y Rodríguez Marrero; Alberto Ruiz Jimeno; Luca Scodellaro; M Sobron Sañudo; Iván Vila; Rocío Vilar; CMS Collaboration

doi:10.1103/PhysRevLett.109.022301

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Azimuthal anisotropy of charged particles at high transverse momenta in Pb-Pb collisions at √s NN=2.76TeV

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Azimuthal anisotropy of charged particles at high transverse momenta in Pb-Pb collisions at √s NN=2.76TeV

S Chatrchyan, J. A Brochero Cifuentes, I. J Cabrillo, Alicia Calderon, S. H Chuang, J Duarte Campderros, Marta Felcini, M Fernández, G Gómez, J González Sánchez, …

Physical review letters, Vol.109(2), 022301

01/01/2012

DOI: 10.1103/PhysRevLett.109.022301

PMID: 23030154

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Abstract

The azimuthal anisotropy of charged particles in Pb-Pb collisions at √s NN=2.76TeV is measured with the CMS detector at the LHC over an extended transverse momentum (p T) range up to approximately 60GeV/c. The data cover both the low-p T region associated with hydrodynamic flow phenomena and the high-p T region where the anisotropies may reflect the path-length dependence of parton energy loss in the created medium. The anisotropy parameter (v 2) of the particles is extracted by correlating charged tracks with respect to the event-plane reconstructed by using the energy deposited in forward-angle calorimeters. For the six bins of collision centrality studied, spanning the range of 0-60% most-central events, the observed v 2 values are found to first increase with p T, reaching a maximum around p T=3GeV/c, and then to gradually decrease to almost zero, with the decline persisting up to at least p T=40GeV/c over the full centrality range measured. © 2012 CERN. Published by the American Physical Society.

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Title: Subtitle: Azimuthal anisotropy of charged particles at high transverse momenta in Pb-Pb collisions at √s NN=2.76TeV
Creators: S Chatrchyan
J. A Brochero Cifuentes
I. J Cabrillo
Alicia Calderon
S. H Chuang
J Duarte Campderros
Marta Felcini
M Fernández
G Gómez
J González Sánchez
C Jorda
P Lobelle Pardo
A López Virto
Jesús Marco
Rafael Marco
Celso Martínez-Rivero
Francisco Matorras
F. J Muñoz Sánchez
Teresa Rodrigo
Ana Y Rodríguez Marrero
Alberto Ruiz Jimeno
Luca Scodellaro
M Sobron Sañudo
Iván Vila
Rocío Vilar
CMS Collaboration
Contributors: Y Onel (Contributor) - University of Iowa, Physics and Astronomy
Resource Type: Journal article
Publication Details: Physical review letters, Vol.109(2), 022301
DOI: 10.1103/PhysRevLett.109.022301
PMID: 23030154
NLM abbreviation: Phys Rev Lett
ISSN: 0031-9007
eISSN: 1079-7114
Publisher: American Physical Society
Grant note: DOI: 10.13039/100000015, name: U.S. Department of Energy; DOI: 10.13039/100000001, name: National Science Foundation
Language: English
Date published: 01/01/2012
Academic Unit: Physics and Astronomy
Record Identifier: 9984199744202771

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