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Title: Checking nonflow assumptions and results via PHENIX published correlations in p+p, p+Au, d+Au, and 3He+Au at √sNN=200 GeV

Abstract

Recently the PHENIX Collaboration has made available two-particle correlation Fourier coefficients for multiple detector combinations in minimum bias p+p and 0–5% central p+Au, d+Au, and 3He+Au collisions at √sNN = 200 GeV [Phys. Rev. C 105, 024901 (2022)]. Using these coefficients for three sets of two-particle correlations, azimuthal anisotropy coefficients v2 and v3 are extracted for midrapidity charged hadrons as a function of transverse momentum. In this paper, we use the available coefficients to explore various nonflow hypotheses as well as to compare the results with theoretical model calculations. The nonflow methods fail basic closure tests with ampt and pythia/angantyr, particularly when including correlations with particles in the low multiplicity light-projectile going direction. In data, the nonflow adjusted v2 results are modestly lower in p+Au and the adjusted v3 results are more significantly higher in p+Au and d+Au. However, the resulting higher values for the ratio v3/v2 in p+Au at RHIC compared to p+Pb at the LHC is additional evidence for a significant overcorrection. Incorporating these additional checks, the conclusion that these flow coefficients are dominated by initial geometry coupled with final-state interactions (e.g., hydrodynamic expansion of quark-gluon plasma) remains true, and explanations based solely on initial-state glasma are ruledmore » out. The detailed balance between intrinsic and fluctuation-driven geometry and the exact role of weakly versus strongly coupled prehydrodynamic evolution remains an open question for triangular flow, requiring further theoretical and experimental investigation.« less

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3];  [1]
  1. Univ. of Colorado, Boulder, CO (United States)
  2. Univ. of North Carolina, Greensboro, NC (United States)
  3. Pusan National Univ., Busan (South Korea)
Publication Date:
Research Org.:
Columbia Univ., New York, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP); National Research Foundation of Korea (NRF)
OSTI Identifier:
1979861
Grant/Contract Number:  
FG02-00ER41152; 2020R1C1C1004985
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. C
Additional Journal Information:
Journal Volume: 105; Journal Issue: 2; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Physics; collective flow; particle correlations & fluctuations; QCD in nuclear reactions; relativistic heavy-ion collisions

Citation Formats

Nagle, J. L., Belmont, R., Lim, S. H., and Seidlitz, B. Checking nonflow assumptions and results via PHENIX published correlations in p+p, p+Au, d+Au, and 3He+Au at √sNN=200 GeV. United States: N. p., 2022. Web. doi:10.1103/physrevc.105.024906.
Nagle, J. L., Belmont, R., Lim, S. H., & Seidlitz, B. Checking nonflow assumptions and results via PHENIX published correlations in p+p, p+Au, d+Au, and 3He+Au at √sNN=200 GeV. United States. https://doi.org/10.1103/physrevc.105.024906
Nagle, J. L., Belmont, R., Lim, S. H., and Seidlitz, B. Mon . "Checking nonflow assumptions and results via PHENIX published correlations in p+p, p+Au, d+Au, and 3He+Au at √sNN=200 GeV". United States. https://doi.org/10.1103/physrevc.105.024906. https://www.osti.gov/servlets/purl/1979861.
@article{osti_1979861,
title = {Checking nonflow assumptions and results via PHENIX published correlations in p+p, p+Au, d+Au, and 3He+Au at √sNN=200 GeV},
author = {Nagle, J. L. and Belmont, R. and Lim, S. H. and Seidlitz, B.},
abstractNote = {Recently the PHENIX Collaboration has made available two-particle correlation Fourier coefficients for multiple detector combinations in minimum bias p+p and 0–5% central p+Au, d+Au, and 3He+Au collisions at √sNN = 200 GeV [Phys. Rev. C 105, 024901 (2022)]. Using these coefficients for three sets of two-particle correlations, azimuthal anisotropy coefficients v2 and v3 are extracted for midrapidity charged hadrons as a function of transverse momentum. In this paper, we use the available coefficients to explore various nonflow hypotheses as well as to compare the results with theoretical model calculations. The nonflow methods fail basic closure tests with ampt and pythia/angantyr, particularly when including correlations with particles in the low multiplicity light-projectile going direction. In data, the nonflow adjusted v2 results are modestly lower in p+Au and the adjusted v3 results are more significantly higher in p+Au and d+Au. However, the resulting higher values for the ratio v3/v2 in p+Au at RHIC compared to p+Pb at the LHC is additional evidence for a significant overcorrection. Incorporating these additional checks, the conclusion that these flow coefficients are dominated by initial geometry coupled with final-state interactions (e.g., hydrodynamic expansion of quark-gluon plasma) remains true, and explanations based solely on initial-state glasma are ruled out. The detailed balance between intrinsic and fluctuation-driven geometry and the exact role of weakly versus strongly coupled prehydrodynamic evolution remains an open question for triangular flow, requiring further theoretical and experimental investigation.},
doi = {10.1103/physrevc.105.024906},
journal = {Physical Review. C},
number = 2,
volume = 105,
place = {United States},
year = {Mon Feb 14 00:00:00 EST 2022},
month = {Mon Feb 14 00:00:00 EST 2022}
}

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