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.

arXiv commentContribution to: Quark Matter 2022, 6 pages and 3 figures