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Title: Multiparticle Collectivity from Initial State Correlations in High Energy Proton-Nucleus Collisions

Qualitative features of multiparticle correlations in light-heavy ion (p +A) collisions at RHIC and LHC are reproduced in a simple initial state model of partons in the projectile coherently scattering off localized domains of color charge in the heavy nuclear target. These include i) the ordering of the magnitudes of the azimuthal angle nth Fourier harmonics of two-particle correlations v n{2}, ii) the energy and transverse momentum dependence of the four-particle Fourier harmonic v 2{4}, and iii) the energy dependence of four-particle symmetric cumulants measuring correlations between different Fourier harmonics. Similar patterns are seen in an Abelian version of the model, where we observe v 2{2} > v 2{4} ≈ v 2{6} ≈ v 2{8} of two, four, six, and eight particle correlations. While such patterns are often interpreted as signatures of collectivity arising from hydrodynamic flow, our results provide an alternative description of the multiparticle correlations seen in p + A collisions.
Authors:
 [1] ;  [2] ;  [3]
  1. American Physical Society, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States). Physics Department
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Physics Department; Stony Brook Univ., NY (United States). Physics and Astronomy Department
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Physics Department
Publication Date:
Report Number(s):
BNL-203403-2018-JAAM
Journal ID: ISSN 0031-9007; PRLTAO
Grant/Contract Number:
SC0012704; FG02-88ER40388; AC02-05CH11231
Type:
Published Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 120; Journal Issue: 4; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1418086
Alternate Identifier(s):
OSTI ID: 1430889