| 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) |
|
|
| | |
|