Köln 2025 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 23: Poster

HK 23.28: Poster

Tuesday, March 11, 2025, 17:30–19:00, Foyer Physik

Measurement of the particle emitting source in pp collisions at 13.6 TeV using p-Λ correlations with ALICE — •Jaime Gonzalez for the ALICE Germany collaboration — Technical University of Munich, Germany

The femtoscopic technique allows the study of the hyperon-nucleon interaction with much lower relative momenta and higher precision compared to conventional scattering experiments. Throughout the years it has helped understand the interaction of stranger and unstable hadrons in greater detail, with the goal of shedding some light on the equation of state (EoS) of neutron stars. This was in previous studies during the Run 2 period of the LHC at the ALICE experiment done by modeling the particle-emitting source which was found to share a common transverse mass mT dependence for all hadron-hadron systems. The latest Run 3 of the LHC has provided a much larger minimum bias data set of pp collisions and for the first time allows the introduction of an event multiplicity dependence of the mT dependent source. This contribution showcases the multiplicity dependent mT scaling of p-Λ pairs in small collision systems, whose interaction is modeled using the state-of-the-art χEFT calculations and its prospect is to help understand the EoS of neutron stars. Furthermore, these results complement similar source size measurements using p-p pairs and overall aim to build the foundation for future femtoscopic studies with ALICE in Run 3.