# Pseudorapidity dependence of long-range two-particle correlations in pPb collisions at sqrt(s[NN])=5.02 TeV

Abstract : Two-particle correlations in pPb collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV are studied as a function of the pseudorapidity separation (Delta eta) of the particle pair at small relative azimuthal angle (abs(Delta phi)< pi/3). The correlations are decomposed into a jet component that dominates the short-range correlations (abs(Delta eta) < 1), and a component that persists at large Delta eta and may originate from collective behavior of the produced system. The events are classified in terms of the multiplicity of the produced particles. Finite azimuthal anisotropies are observed in high-multiplicity events. The second and third Fourier components of the particle-pair azimuthal correlations, V[2] and V[3], are extracted after subtraction of the jet component. The single-particle anisotropy parameters v[2] and v[3] are normalized by their lab frame mid-rapidity value and are studied as a function of eta[cm]. The normalized v[2] distribution is found to be asymmetric about eta[cm] = 0, with smaller values observed at forward pseudorapidity, corresponding to the direction of the proton beam, while no significant pseudorapidity dependence is observed for the normalized v[3] distribution within the statistical uncertainties.
Type de document :
Pré-publication, Document de travail
Submitted to Phys. Rev. C ; see paper for full list of authors. 2016
Domaine :

http://hal.in2p3.fr/in2p3-01304604
Contributeur : Sylvie Flores <>
Soumis le : jeudi 28 avril 2016 - 07:39:44
Dernière modification le : mardi 16 janvier 2018 - 16:09:23

### Identifiants

• HAL Id : in2p3-01304604, version 1
• ARXIV : 1604.05347

### Citation

V. Khachatryan, M. Besançon, F. Couderc, M. Dejardin, D. Denegri, et al.. Pseudorapidity dependence of long-range two-particle correlations in pPb collisions at sqrt(s[NN])=5.02 TeV. Submitted to Phys. Rev. C ; see paper for full list of authors. 2016. 〈in2p3-01304604〉

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