Tracing the emergence of collectivity phenomena in small systems

Abstract

We study initial state momentum correlations and event-by-event geometry in p+Pb collisions at $\sqrt{s}=5.02\mathrm{TeV}$ by following the approach of extending the IP-Glasma model to 3D using JIMWLK rapidity evolution. On examining the non-trivial rapidity dependence of the observables, we find that the geometry is correlated over large rapidity intervals, while the initial state momentum correlations have a relatively short range in rapidity. Based on our results, we discuss implications for the relevance of both effects in explaining the origin of collective phenomena in small systems.

Comments: Contribution to: Quark Matter 2022, 6 pages and 3 figures