Anisotropic flow of charged hadrons, pions and (anti-)protons measured at high transverse momentum in Pb-Pb collisions at $\snn=2.76$ TeV

B. Abelev; N. Arbor; G. Conesa Balbastre; J. Faivre; C. Furget; R. Guernane; S. Kox; J.S. Real; C. Silvestre; R. Vernet; I. Belikov; B. Hippolyte; S. Jangal; C. Kuhn; C. Roy; X. Sanchez Castro; S. Senyukov; R. Wan; L. Aphecetche; G. Batigne; E. Bergognon; M. Bregant; H. Delagrange; O. Driga; M. Estienne; M. Germain; A. Lardeux; F. Lefèvre; M. Lenhardt; L. Luquin; G. Martınez Garcıa; A. Mas; L. Massacrier; A. Matyja; P. Pillot; Y. Schutz; A. Shabetai; D. Stocco; S.U. 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; c. Cheshkov; B. Cheynis; L. Ducroux; M. Guilbaud; R. Tieulent; A. Uras

HAL : in2p3-00703611, version 1

arXiv : 1205.5761

DOI : 10.1016/j.physletb.2012.12.066

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Physics Letters B 719 (2013) 18-28

Anisotropic flow of charged hadrons, pions and (anti-)protons measured at high transverse momentum in Pb-Pb collisions at $\snn=2.76$ TeV

B. Abelev, N. Arbor¹, G. Conesa Balbastre¹, J. Faivre¹, C. Furget¹, R. Guernane¹, S. Kox¹, J.S. Real¹, C. Silvestre¹, R. Vernet², I. Belikov³, B. Hippolyte³, S. Jangal³, C. Kuhn³, C. Roy³, X. Sanchez Castro³, S. Senyukov³, R. Wan³, L. Aphecetche⁴, G. Batigne⁴, E. Bergognon, M. Bregant⁴, H. Delagrange⁴, O. Driga⁴, M. Estienne⁴, M. Germain⁴, A. Lardeux⁴, F. Lefèvre⁴, M. Lenhardt⁴, L. Luquin⁴, G. Martınez Garcıa⁴, A. Mas⁴, L. Massacrier⁴, A. Matyja⁴, P. Pillot⁴, Y. Schutz⁴, A. Shabetai⁴, D. Stocco⁴, S.U. Ahn⁵, Y. .W. Baek⁵, A. Baldit⁵, V. Barret⁵, N. Bastid⁵, P. Crochet⁵, P. Dupieux⁵, R. Ichou⁵, X. Lopez⁵, F. Manso⁵, M. Marchisone⁵, S. Porteboeuf-Houssais⁵, P. Rosnet⁵, B. Vulpescu⁵, X. Zhang⁵, c. Cheshkov⁶, B. Cheynis⁶, L. Ducroux⁶, M. Guilbaud⁶, R. Tieulent⁶, A. Uras⁶

ALICE Collaboration(s)

(2013)

The elliptic, $v_2$, triangular, $v_3$, and quadrangular, $v_4$, flow coefficients are measured for unidentified charged particles, pions and (anti-)protons in Pb-Pb collisions at $\snn = 2.76$ TeV with the ALICE detector at the Large Hadron Collider. Results obtained with the event plane and four-particle correlation methods are reported for the pseudo-rapidity range $|\eta|<0.8$ at different collision centralities and as a function of transverse momentum, $\pt$, out to $\pt=20$ GeV/$c$. The observed non-zero elliptic and triangular flow depends only weakly on transverse momentum for $\pt>8$ GeV/$c$. The small $\pt$ dependence of the difference between elliptic flow results obtained from two- and four-particle cumulant methods suggests a common origin of flow fluctuations up to $\pt=8$ GeV/$c$. The magnitude of the (anti-)proton elliptic and triangular flow is larger than that of pions out to at least $\pt=8$ GeV/$c$ indicating that the particle type dependence persists out to high $\pt$.

1 :	LPSC - Laboratoire de Physique Subatomique et de Cosmologie

2 :	CC IN2P3 - Centre de Calcul de l'inst. national de phy. nucléaire et de phy. des particules

3 :	DRS-IPHC - Département Recherches Subatomiques

4 :	SUBATECH - Laboratoire SUBATECH Nantes

5 :	LPC-CLERMONT - Laboratoire de Physique Corpusculaire de Clermont-Ferrand

6 :	IPNL - Institut de Physique Nucléaire de Lyon

Thème(s)

Physique/Physique des Hautes Energies - Expérience

Physique/Physique Nucléaire Expérimentale

Physique/Physique Nucléaire Théorique

Lien vers le texte intégral :

http://fr.arXiv.org/abs/1205.5761


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Contributeur : Emmanuelle Vernay <>
Soumis le : Lundi 4 Juin 2012, 09:10:19
Dernière modification le : Jeudi 7 Mars 2013, 07:54:27