Measurements of Multiparticle Correlations in d plus Au Collisions at 200, 62.4, 39, and 19.6 GeV and p plus Au Collisions at 200 GeV and Implications for Collective Behavior

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PHENIX Collaboration , Aidala , C & Kim , D J 2018 , ' Measurements of Multiparticle Correlations in d plus Au Collisions at 200, 62.4, 39, and 19.6 GeV and p plus Au Collisions at 200 GeV and Implications for Collective Behavior ' , Physical Review Letters , vol. 120 , no. 6 , 062302 . https://doi.org/10.1103/PhysRevLett.120.062302

Title: Measurements of Multiparticle Correlations in d plus Au Collisions at 200, 62.4, 39, and 19.6 GeV and p plus Au Collisions at 200 GeV and Implications for Collective Behavior
Author: PHENIX Collaboration; Aidala, C.; Kim, D. J.
Other contributor: University of Helsinki, Helsinki Institute of Physics
Date: 2018-02-06
Language: eng
Number of pages: 8
Belongs to series: Physical Review Letters
ISSN: 0031-9007
DOI: https://doi.org/10.1103/PhysRevLett.120.062302
URI: http://hdl.handle.net/10138/234712
Abstract: Recently, multiparticle-correlation measurements of relativistic p/d(3)He + Au, p + Pb, and even p + p collisions show surprising collective signatures. Here, we present beam-energy-scan measurements of two, four-, and six-particle angular correlations in d + Au collisions at root s(NN) = 200, 62.4, 39, and 19.6 GeV. We also present measurements of two-and four-particle angular correlations in p + Au collisions at root s(NN) = 200 GeV. We find the four-particle cumulant to be real valued for d + Au collisions at all four energies. We also find that the four-particle cumulant in p + Au has the opposite sign as that in d + Au. Further, we find that the six-particle cumulant agrees with the four-particle cumulant in d + Au collisions at 200 GeV, indicating that nonflow effects are subdominant. These observations provide strong evidence that the correlations originate from the initial geometric configuration, which is then translated into the momentum distribution for all particles, commonly referred to as collectivity.
Subject: RELATIVISTIC NUCLEAR COLLISIONS
QUARK-GLUON PLASMA
LONG-RANGE
ANGULAR-CORRELATIONS
DETECTOR
PHENIX
FLOW
LHC
COLLABORATION
PERSPECTIVE
114 Physical sciences
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