Charge separation relative to the reaction plane in Pb-Pb collisions at $\sqrt{s_{NN}}= 2.76$ TeV

B. Abelev; L. Aphecetche; A. Baldisseri; A.A.E. Bergognon; H. Borel; J. Castillo Castellanos; J.L. Charvet; C. Cheshkov; B. Cheynis; H. Delagrange; O. Driga; L. Ducroux; B. Erazmus; M. Estienne; M. Germain; C. Geuna; J.-Y. Grossiord; M. Guilbaud; B. Hippolyte; C. Kuhn; A. Lardeux; F. Lefevre; L. Luquin; G. Martınez Garcıa; A. Mas; L. Massacrier; H. Pereira Da Costa; P. Pillot; A. Rakotozafindrabe; C. Roy; X. Sanchez Castro; Y. Schutz; D. Stocco; R. Tieulent; A. Uras; R. Vernet; Y. Zoccarato; N. Arbor; G. Conesa Balbastre; J. Faivre; C. Furget; R. Guernane; S. Kox; J.S. Real; C. Silvestre; Sang Un Ahn; Y.W. Baek; A. Baldit; V. Barret; N. Bastid; P. Crochet; P. Dupieux; R. Ichou; X. Lopez; F. Manso; M. Marchisone; S. Porteboeuf-Houssais; P. Rosnet; B. Vulpescu; X. Zhang; B. Boyer; I. Das; B. Espagnon; C. Hadjidakis; I. Hřivnáčová; I. Lakomov; Y. Le Bornec; C. Suire; J. D. Tapia Takaki; L. Valencia Palomo

doi:10.1103/PhysRevLett.110.012301

Charge separation relative to the reaction plane in Pb-Pb collisions at $\sqrt{s_{NN}}= 2.76$ TeV

B. Abelev L. Aphecetche ¹ A. Baldisseri ² A.A.E. Bergognon ¹ H. Borel ² J. Castillo Castellanos ² J.L. Charvet ² C. Cheshkov ³ B. Cheynis ³ H. Delagrange ¹ O. Driga ¹ L. Ducroux ³ B. Erazmus ¹ M. Estienne ¹ M. Germain ¹ C. Geuna ² J.-Y. Grossiord ³ M. Guilbaud ³ B. Hippolyte ⁴ C. Kuhn ⁴ A. Lardeux ¹ F. Lefevre ¹ L. Luquin ¹ G. Martınez Garcıa ¹ A. Mas ¹ L. Massacrier ¹ H. Pereira Da Costa ² P. Pillot ¹ A. Rakotozafindrabe ² C. Roy ⁴ X. Sanchez Castro ⁴ Y. Schutz ¹ D. Stocco ¹ R. Tieulent ³ A. Uras ³ R. Vernet ⁵ Y. Zoccarato ³ N. Arbor ⁶ G. Conesa Balbastre ⁶ J. Faivre ⁶ C. Furget ⁶ R. Guernane ⁶ S. Kox ⁶ J.S. Real ⁶ C. Silvestre ⁶ Sang Un Ahn ⁷ Y.W. Baek ⁸ A. Baldit ⁸ V. Barret ⁸ N. Bastid ⁸ P. Crochet ⁸ P. Dupieux ⁸ R. Ichou ⁸ X. Lopez ⁸ F. Manso ⁸ M. Marchisone ⁸ S. Porteboeuf-Houssais ⁸ P. Rosnet ⁸ B. Vulpescu ⁸ X. Zhang ⁸ B. Boyer ⁶ I. Das ⁹ B. Espagnon ⁹ C. Hadjidakis ⁹ I. Hřivnáčová ⁹ I. Lakomov ⁹ Y. Le Bornec ⁹ C. Suire ⁹ J. D. Tapia Takaki ⁹ L. Valencia Palomo ⁹

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'IN2P3

6 LPSC - Laboratoire de Physique Subatomique et de Cosmologie

7 Laboratoire de Physique Corpusculaire

LPC - Laboratoire de Physique Corpusculaire [Clermont-Ferrand]

8 LPC - Laboratoire de Physique Corpusculaire [Clermont-Ferrand]

9 IPNO - Institut de Physique Nucléaire d'Orsay

Abstract : 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.

Document type :

Journal articles

Physical Review Letters, American Physical Society, 2013, 110, pp.012301. <10.1103/PhysRevLett.110.012301>

Domain :

Physics / Nuclear Experiment

http://hal.in2p3.fr/in2p3-00714568
Contributor : Sylvie Florès <>
Submitted on : Thursday, July 5, 2012 - 9:36:37 AM
Last modification on : Wednesday, November 26, 2014 - 2:12:51 PM

Charge separation relative to the reaction plane in Pb-Pb collisions at $\sqrt{s_{NN}}= 2.76$ TeV

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