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Physical Review Letters 110 (2013) 012301
Charge separation relative to the reaction plane in Pb-Pb collisions at $\sqrt{s_{NN}}= 2.76$ TeV
B. Abelev, L. Aphecetche1, A. Baldisseri2, A.A.E. Bergognon1, H. Borel2, J. Castillo Castellanos2, J.L. Charvet2, c. Cheshkov3, B. Cheynis3, H. Delagrange1, O. Driga1, L. Ducroux3, B. Erazmus1, M. Estienne1, M. Germain1, C. Geuna2, J.-Y. Grossiord3, M. Guilbaud3, B. Hippolyte4, C. Kuhn4, A. Lardeux1, F. Lefevre1, L. Luquin1, G. Martınez Garcıa1, A. Mas1, L. Massacrier1, H. Pereira Da Costa2, P. Pillot1, A. Rakotozafindrabe2, C. Roy4, X. Sanchez Castro4, Y. Schutz1, D. Stocco1, R. Tieulent3, A. Uras3, R. Vernet5, Y. Zoccarato3, N. Arbor6, G. Conesa Balbastre6, J. Faivre6, C. Furget6, R. Guernane6, S. Kox6, J.S. Real6, C. Silvestre6, Sang Un Ahn7, Y.W. Baek7, A. Baldit7, V. Barret7, N. Bastid7, P. Crochet7, P. Dupieux7, R. Ichou7, X. Lopez7, F. Manso7, M. Marchisone7, S. Porteboeuf-Houssais7, P. Rosnet7, B. Vulpescu7, X. Zhang7, B. Boyer6, I. Das8, B. Espagnon8, C. Hadjidakis8, I. Hřivnáčová8, I. Lakomov8, Y. Le Bornec8, C. Suire8, J. D. Tapia Takaki8, L. Valencia Palomo8
For the ALICE collaboration(s)
(2013)

Measurements of charge dependent azimuthal correlations with the ALICE detector at the LHC are reported for Pb-Pb collisions at $\sqrt{s_{NN}} = 2.76$ TeV. Two- and three-particle charge-dependent azimuthal correlations in the pseudo-rapidity range $|\eta | < 0.8$ are presented as a function of the collision centrality, particle separation in pseudo-rapidity, and transverse momentum. A clear signal compatible with the expectation of a charge-dependent separation relative to the reaction plane is observed, which shows little or no collision energy dependence when compared to measurements at RHIC energies. Models incorporating effects of local parity violation in strong interactions fail to describe the observed collision energy dependence.
1:  SUBATECH - Laboratoire SUBATECH Nantes
2:  IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers (ex DAPNIA)
3:  IPNL - Institut de Physique Nucléaire de Lyon
4:  DRS-IPHC - Département Recherches Subatomiques
5:  CC IN2P3 - Centre de Calcul de l'inst. national de phy. nucléaire et de phy. des particules
6:  LPSC - Laboratoire de Physique Subatomique et de Cosmologie
7:  LPC - Laboratoire de Physique Corpusculaire [Clermont-Ferrand]
8:  IPNO - Institut de Physique Nucléaire d'Orsay
Laboratoire de Physique Corpusculaire
Physics/Nuclear Experiment
Fulltext link: 
http://fr.arXiv.org/abs/1207.0900