Gießen 2024 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 72: Poster

HK 72.38: Poster

Donnerstag, 14. März 2024, 17:15–18:45, HBR 14: Foyer

The future of three-body interactions: femtoscopic p-p-p and p-p-Λ correlations in ALICE Run 3 — •Laura Serksnyte for the ALICE Germany collaboration — TUM

A satisfactory description of many-body systems, such as (hyper)nuclei or the core of neutron stars, demands a comprehensive understanding of two-body and three-body interactions. The latter are usually studied in traditional proton-deuteron scattering experiments or by measuring properties of (hyper)nuclei. The ALICE Collaboration recently proposed a novel way to access interactions in three-hadron systems by measuring the femtoscopic correlation functions in momentum space. Such an experimental approach provides a unique opportunity to study a 3→3 scattering process, including previously inaccessible systems, for example, three unbound protons (p-p-p) or a triplet including a Lambda hyperon (p-p-Λ). Such measurements performed in Run 2 by ALICE motivated the theorists to develop a framework calculating correlation functions with state-of-the-art description of the interactions. However, the available statistical sample in Run 2 is limited, and more data is needed to challenge theoretical models and to perform precision studies. In this poster, we present the preliminary measurements of p-p-p and p-p-Λ correlation functions in pp collisions at √s = 13.6 TeV measured by ALICE in the Run 3 data taking campaign which allowed for a sevenfold increase in statistics.

This research was funded by the DFG under Germany’s Excellence Strategy - EXC2094 - 390783311 and the BMBF Verbundforschung (05P21WOCA1 ALICE).

Keywords: femtoscopy,three-body