Systematics of azimuthal anisotropy harmonics in proton–nucleus collisions at the LHC from the Color Glass Condensate

Mace, Mark; Skokov, Vladimir V.; Tribedy, Prithwish; Venugopalan, Raju

doi:10.1016/j.physletb.2018.09.064

Title: Systematics of azimuthal anisotropy harmonics in proton–nucleus collisions at the LHC from the Color Glass Condensate

Journal Article · Tue Jan 01 00:00:00 EST 2019 · Physics Letters B

DOI:https://doi.org/10.1016/j.physletb.2018.09.064· OSTI ID:1481223

Mace, Mark;

;

; Venugopalan, Raju

Here, simple power counting arguments in the dilute-dense framework of the Color Glass Condensate (CGC) Effective Field Theory predict that even and odd azimuthal anisotropy harmonics of two-particle correlations in proton-nucleus collisions at the LHC will respectively satisfy v²_2n {2} ∝ N⁰_ch and v²_2n+1 {2} ∝ N_ch, where N_ch denotes the number of charged particles. We show that these expectations are borne out qualitatively, and even quantitatively, within systematic uncertainties, for v₂ and v₄ in comparisons with data from the ATLAS collaboration. We also observe that ATLAS data for the v₃ azimuthal harmonic are in excellent agreement with our qualitative expectation; quantitative comparisons are numerically challenging at present. The lessons from this study fully complement those gained by the recent comparison of the CGC dilute-dense framework [1] to data from the PHENIX collaboration on small system collisions at RHIC.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: SC0012704; FG02-88ER40388; AC02-05CH11231

OSTI ID:: 1481223

Alternate ID(s):: OSTI ID: 1493574

Report Number(s):: BNL-211242-2019-JAAM; S0370269318308438; PII: S0370269318308438

Journal Information:: Physics Letters B, Journal Name: Physics Letters B Vol. 788 Journal Issue: C; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: Netherlands

Language:: English

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