SMuK 2021 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 27: Heavy-Ion Collisions and QCD Phases V
HK 27.2: Vortrag
Freitag, 3. September 2021, 14:30–14:45, H1
Tracing the emergence of collective phenomena in small systems — •Pragya Singh1, Soeren Schlichting1, and Björn Schenke2 — 1University of Bielefeld, Bielefeld, Germany — 2Brookhaven National Laboratory, Upton, NY 11973, USA
Event geometry and initial state correlations have been invoked as possible explanations of long-range rapidity correlations (ridge) observed in high multiplicity pp and pPb collisions. We study initial state momentum correlations and event-by-event geometry in p+Pb collisions at √s=5.02 TeV by following the approach of extending the impact parameter dependent Glasma model (IP-Glasma) to 3D using JIMWLK rapidity evolution of the incoming nuclear gluon distribution [1].
Investigating the non-trivial rapidity dependence of the observables, we find that geometry is correlated across large rapidity intervals whereas initial state momentum correlations are 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.
[1]. B. Schenke and S. Schlichting, Phys. Rev. C 94,044907, arXiv: 1605.07158 [hep-ph]