|
Title
|
|
|
|
Azimuthal anisotropy of charged particles at high transverse momenta in Pb-Pb collisions at =2.76 TeV
| |
|
Author
|
|
|
|
| |
|
Institution/Organisation
|
|
|
|
CMS Collaboration
| |
|
Abstract
|
|
|
|
| The azimuthal anisotropy of charged particles in Pb-Pb collisions at root S-NN = 2.76 TeV is measured with the CMS detector at the LHC over an extended transverse momentum (p(T)) range up to approximately 60 GeV/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 (nu(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 nu(2) values are found to first increase with p(T), reaching a maximum around p(T) = 3 GeV/c, and then to gradually decrease to almost zero, with the decline persisting up to at least p(T) = 40 GeV/c over the full centrality range measured. |
| |
|
Language
|
|
|
|
English
| |
|
Source (journal)
|
|
|
|
Physical review letters. - New York, N.Y.
| |
|
Publication
|
|
|
|
New York, N.Y.
:
2012
| |
|
ISSN
|
|
|
|
0031-9007
| |
|
Volume/pages
|
|
|
|
109
:2
(2012)
, 15 p.
| |
|
Article Reference
|
|
|
|
022301
| |
|
ISI
|
|
|
|
000306324400005
| |
|
Medium
|
|
|
|
E-only publicatie
| |
|
Full text (Publisher's DOI)
|
|
|
|
| |
|
Full text (open access)
|
|
|
|
| |
|