  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 v^2_{2n} ~ N_{ch}^0 and
v^2_{2n+1} ~ 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 v_2 and v_4 in comparisons
with data from the ATLAS collaboration. We also observe that ATLAS data for the
v_3 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 [arXiv:1805.09342] to data from
the PHENIX collaboration on small system collisions at RHIC.
