SMuK 2023 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 74: Poster

HK 74.38: Poster

Donnerstag, 23. März 2023, 17:30–19:00, HSZ EG

Constraining the interaction between Λ and Kaons with femtoscopy at LHC — •Emma Chizzali for the ALICE Germany collaboration — Technical University of Munich, Munich, Germany

The meson-baryon interaction among short-lived strange particles as Λ and kaons is very challenging to be accessed in scattering experiments. Recently, an alternative approach to access the strong interaction in these systems was provided by measuring of two-body momentum correlations. Of special interest is the ΛK- interaction, which is characterized by the presence of the Xi(1620) state, recently observed by Belle, which can couple to ΛK- and lies just above the threshold. The ΛK+,- correlation function, already studied by the ALICE Collaboration in Pb-Pb collisions, has now been measured in pp Collisions at sqrt(s)=13 TeV. The small size of the particle-emitting source produced in this colliding system makes it possible to study short-ranged strong potentials with much higher precision. The results show that the ΛK+ interaction is repulsive and dominated by elastic processes. The measured ΛK- correlation function indicates an attractive interaction composed of a resonant contribution, through the Xi(1620) resonance, and a non resonant one.

Funded by DFG Projekt "C^3ATS: Effekte aufgrund der Kopplung der Kanäle im Analysis Tool für Korrelationen das die Schrödinger Gleichung verwendet" (MA 8660/1-1), BMBF Verbundforschung (05P21WOCA1 ALICE) and MPP IMPRS