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Title: Pseudorapidity dependence of long-range two-particle correlations in $p$Pb collisions at $$\sqrt{s_{NN}}=5.02$$ TeV

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.
Authors:
 [1]
  1. Yerevan Physics Institute, Yerevan (Armenia). et al.
Publication Date:
Report Number(s):
FERMILAB-PUB-16-202-CMS; CMS-HIN-14-008; CERN-EP-2016-042; arXiv:1604.05347
Journal ID: ISSN 2469-9985; 1449080
Grant/Contract Number:
AC02-07CH11359
Type:
Published Article
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 96; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Orgs:
CMS
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1373433
Alternate Identifier(s):
OSTI ID: 1288746

Khachatryan, Vardan. Pseudorapidity dependence of long-range two-particle correlations in $p$Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV. United States: N. p., Web. doi:10.1103/PhysRevC.96.014915.
Khachatryan, Vardan. Pseudorapidity dependence of long-range two-particle correlations in $p$Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV. United States. doi:10.1103/PhysRevC.96.014915.
Khachatryan, Vardan. 2016. "Pseudorapidity dependence of long-range two-particle correlations in $p$Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV". United States. doi:10.1103/PhysRevC.96.014915.
@article{osti_1373433,
title = {Pseudorapidity dependence of long-range two-particle correlations in $p$Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV},
author = {Khachatryan, Vardan},
abstractNote = {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.},
doi = {10.1103/PhysRevC.96.014915},
journal = {Physical Review C},
number = ,
volume = 96,
place = {United States},
year = {2016},
month = {4}
}