Initial state azimuthal anisotropies in small collision systems
arXiv:1512.07209 · doi:10.1016/j.nuclphysa.2016.02.015
Abstract
Strong multiparticle azimuthal correlations have recently been observed in high energy proton-nucleus collisions. While final state collective effects can be responsible for many of the observations, the domain structure in the classical color field of a high energy nucleus also naturally leads to such correlations. We describe recent calculations of the momentum space 2-particle cumulant azimuthal anisotropy coefficients v_n{2}, n=2,3,4 from fundamental representation Wilson line distributions describing the high energy nucleus. We find significant differences between Wilson lines from the MV model and from JIMWLK evolution. We also discuss the relation of this calculation to earlier work on the ridge correlation obtained in the "glasma graph" approximation, and to the "color electric field domain model."
4 pages, 1 figure. Talk at the Quark Matter 2015 conference, September 27 - October 3, 2015, Kobe, Japan
References in corpus (5)
- The ridge in proton-proton collisions at the LHC
- Tracing the origin of azimuthal gluon correlations in the color glass condensate
- On the running coupling in the JIMWLK equation
- Initial state angular asymmetries in high energy p+A collisions: spontaneous breaking of rotational symmetry by a color electric field and C-odd fluctuations
- Azimuthal harmonics of color fields in a high energy nucleus