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Title: Parton model description of multiparticle azimuthal correlations in p A collisions

Journal Article · · Physical Review D

In [1], an initial state “parton model” of quarks scattering off a dense nuclear target was shown to qualitatively reproduce the systematics of multiparticle azimuthal anisotropy cumulants measured in proton/deuteron-nucleus (pA) collisions at RHIC and the LHC. The systematics included i) the behavior of the four-particle cumulant c2{4}, which generates a real four-particle second Fourier harmonic v2{4}, ii) the ordering v2{2} > v2{4} ≈ v2{6} ≈ v2{8} for two-, four-, six-, and eight-particle Fourier harmonics, iii) the behavior of so-called symmetric cumulants SC(2,3) and SC(2,4). These features of azimuthal multiparticle cumulants were previously interpreted as a signature of hydrodynamic flow; our results challenge this interpretation. We expand here upon our previous study and present further details and novel results on the saturation scale and transverse momentum (p) dependence of multiparticle azimuthal correlations. We find that the dependence of v2{2} and v2{4} on the number of color domains in the target varies with the p window explored. We extend our prior discussion of symmetric cumulants and compute as yet unmeasured symmetric cumulants. We investigate the Nc dependence of v2{2} and v2{4}. We contrast our results, which include multiple scatterings of each quark off the target, to the Glasma graph approximation, where each quark suffers at most two gluon exchanges with the target. We find that coherent multiple scattering is essential to obtain a positive definite v2{4}. We provide an algorithm to compute expectation values of arbitrary products of the “dipole” lightlike Wilson line correlators.

Research Organization:
Brookhaven National Lab. (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:
1418085
Alternate ID(s):
OSTI ID: 1430888
Report Number(s):
BNL-203402-2018-JAAM; PRVDAQ; 016014
Journal Information:
Physical Review D, Journal Name: Physical Review D Vol. 97 Journal Issue: 1; ISSN 2470-0010
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 45 works
Citation information provided by
Web of Science

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Cited By (5)

Non-eikonal corrections to multi-particle production in the color glass condensate journal July 2019
Bulk quantities in nuclear collisions from running-coupling k T factorization and hybrid simulations journal July 2019
Multiparticle correlation studies in p Pb collisions at s N N = 8.16 TeV journal January 2020
Double and triple inclusive gluon production at mid rapidity: quantum interference in p-A scattering journal September 2018
Observation of correlated azimuthal anisotropy Fourier harmonics in pp and pPb collisions at the LHC text January 2017