Azimuthal harmonics of color fields in ahigh energy nucleus

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http://hdl.handle.net/10138/203406

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Lappi , T 2015 , ' Azimuthal harmonics of color fields in ahigh energy nucleus ' Physics Letters B , vol. 744 , pp. 315-319 . DOI: 10.1016/j.physletb.2015.04.015

Title: Azimuthal harmonics of color fields in ahigh energy nucleus
Author: Lappi, T.
Contributor: University of Helsinki, Helsinki Institute of Physics
Date: 2015-05-11
Language: eng
Number of pages: 5
Belongs to series: Physics Letters B
ISSN: 0370-2693
URI: http://hdl.handle.net/10138/203406
Abstract: Recent experimental results have revealed a surprisingly rich structure of multiparticle azimuthal correlations in high energy proton-nucleus collisions. Final state collective effects can be responsible for many of the observed effects, but it has recently been argued that a part of these correlations are present already in the wavefunctions of the colliding particles. We evaluate the momentum space 2-particle cumulant azimuthal anisotropy coefficients v(n){2}, n = 2, 3, 4 from fundamental representation Wilson line distributions describing the high energy nucleus. These would correspond to the flow coefficients in very forward proton-nucleus scattering. We find significant differences between Wilson lines from the MV model and from JIMWLK evolution. The magnitude and qualitative transverse momentum dependence of the v(n){2} values suggest that the fluctuations present in the initial fields are a significant contribution to the observed anisotropies. (C) 2015 The Author. Published by Elsevier B.V.
Subject: GLUON DISTRIBUTION-FUNCTIONS
GLASMA FLUX TUBES
ANGULAR-CORRELATIONS
TRANSVERSE-MOMENTUM
PPB COLLISIONS
PB COLLISIONS
LONG-RANGE
SIDE
MULTIPLICITY
CONDENSATE
114 Physical sciences
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