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HK: Fachverband Physik der Hadronen und Kerne

HK 23: Poster

HK 23.24: Poster

Dienstag, 11. März 2025, 17:30–19:00, Foyer Physik

Exploring the particle emission source in proton-proton collisions via collective expansion — •Sebastian Wind — Technische Universität München

While the formation of Quark-Gluon Plasma (QGP) and associated collective behavior are well-established in heavy-ion collisions, their existence in proton- proton (pp) collisions remains unknown. Recent femtoscopic measurements have revealed signatures typically associated with collective behavior in pp collisions, challenging our understanding of small system collisions.

In this research, we investigate the mT scaling behavior via collective expansion using the analytically solvable hydrodynamical Gubser solution. By comparing our predictions to ALICE collaboration data and contrasting them with non-hydrodynamical model calculations, we try to understand whether the observed mT scaling behaviour can be related to the collective expansion. This work provides insights into potential QGP formation in small system collisions and the applicability of hydrodynamics in describing pp collisions. In particular it helps to bridge the gap between our understanding of heavy-ion and proton-proton collisions

Keywords: proton-proton collision; quark-gluon plasma; collectivity