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Title: Azimuthal asymmetries and the emergence of “collectivity” from multi-particle correlations in high-energy pA collisions

Abstract

In this study, we show how angular asymmetries ~cos2φ can arise in dipole scattering at high energies. We illustrate the effects due to anisotropic fluctuations of the saturation momentum of the target with a finite correlation length in the transverse impact parameter plane, i.e. from a domain-like structure. We compute the two-particle azimuthal cumulant in this model including both one-particle factorizable as well as genuine two-particle non-factorizable contributions to the two-particle cross section. We also compute the full BBGKY hierarchy for the four-particle azimuthal cumulant and find that only the fully factorizable contribution to c 2{4} is negative while all contributions from genuine two, three and four particle correlations are positive. Our results may provide some qualitative insight into the origin of azimuthal asymmetries in p + Pb collisions at the LHC which reveal a change of sign of c 2{4} in high multiplicity events. (author)

Authors:
 [1];  [2];  [3]
  1. Baruch College, New York, NY (United States); The City Univ. of New York, New York, NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States); China Central Normal Univ., Wuhan (China)
  3. Western Michigan Univ., Kalamazoo MI (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1198588
Alternate Identifier(s):
OSTI ID: 1184845; OSTI ID: 1201358
Report Number(s):
BNL-108166-2015-JA
Journal ID: ISSN 0370-2693; PII: S0370269315001379; TRN: US1601150
Grant/Contract Number:  
FG02-09ER41620; SC0002307; SC00112704
Resource Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 743; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; azimuthal asymmetrics; high-energy pA collisions

Citation Formats

Dumitru, Adrian, McLerran, Larry, and Skokov, Vladimir. Azimuthal asymmetries and the emergence of “collectivity” from multi-particle correlations in high-energy pA collisions. United States: N. p., 2015. Web. doi:10.1016/j.physletb.2015.02.046.
Dumitru, Adrian, McLerran, Larry, & Skokov, Vladimir. Azimuthal asymmetries and the emergence of “collectivity” from multi-particle correlations in high-energy pA collisions. United States. doi:10.1016/j.physletb.2015.02.046.
Dumitru, Adrian, McLerran, Larry, and Skokov, Vladimir. Mon . "Azimuthal asymmetries and the emergence of “collectivity” from multi-particle correlations in high-energy pA collisions". United States. doi:10.1016/j.physletb.2015.02.046.
@article{osti_1198588,
title = {Azimuthal asymmetries and the emergence of “collectivity” from multi-particle correlations in high-energy pA collisions},
author = {Dumitru, Adrian and McLerran, Larry and Skokov, Vladimir},
abstractNote = {In this study, we show how angular asymmetries ~cos2φ can arise in dipole scattering at high energies. We illustrate the effects due to anisotropic fluctuations of the saturation momentum of the target with a finite correlation length in the transverse impact parameter plane, i.e. from a domain-like structure. We compute the two-particle azimuthal cumulant in this model including both one-particle factorizable as well as genuine two-particle non-factorizable contributions to the two-particle cross section. We also compute the full BBGKY hierarchy for the four-particle azimuthal cumulant and find that only the fully factorizable contribution to c2{4} is negative while all contributions from genuine two, three and four particle correlations are positive. Our results may provide some qualitative insight into the origin of azimuthal asymmetries in p + Pb collisions at the LHC which reveal a change of sign of c2{4} in high multiplicity events. (author)},
doi = {10.1016/j.physletb.2015.02.046},
journal = {Physics Letters. Section B},
number = C,
volume = 743,
place = {United States},
year = {2015},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1016/j.physletb.2015.02.046

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Cited by: 43 works
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