SMuK 2023 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 67: Hadron Structure and Spectroscopy VIII

HK 67.3: Talk

Thursday, March 23, 2023, 16:30–16:45, SCH/A316

Evidence for a phi-N bound state — •Emma Chizzali for the ALICE Germany collaboration — Technical University of Munich, Munich, Germany

The possible existence of phi-mesic nuclei is widely discussed in the literature, however, experimental evidence so far is missing. The main ingredient for the study of such systems is the phi-N strong interaction, which is characterised by the two spin states S=1/2 and S=3/2 and can be accessed experimentally via momentum correlations. In this talk, a re-analysis of the p-phi correlation function, measured by the ALICE Collaboration in high-multiplicity pp collisions at sqrt(s)=13 TeV, is presented. The S=3/2 channel is constrained using the recently published lattice QCD potential. This makes it possible to study the unknown interaction in the S=1/2, which is modelled by an advanced phenomenological potential. The results of this study show evidence of a bound state in the S=1/2 channel, with sizeable binding energy, which is characterised by a potential strong enough that it results in negative scattering length.

Funded by BMBF Verbundforschung (05P21WOCA1 ALICE) and MPP IMPRS