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HK: Fachverband Physik der Hadronen und Kerne

HK 37: Hadron Structure and Spectroscopy VII

HK 37.2: Talk

Thursday, March 19, 2026, 16:45–17:00, PHIL C 301

Probing hyperon-hyperon interactions with CBM at FAIR — •Gandharva Appagere for the CBM collaboration — Stockholm University, Stockholm, Sweden

Hyperons play a central role in the composition of dense baryonic matter and are expected to emerge in the cores of neutron stars at supra-nuclear densities, influencing the equation of state. A quantitative understanding of hyperon-hyperon interactions, governed by non-perturbative QCD, is therefore essential for constraining the properties of dense matter. In this contribution, recent studies of multi-strange baryon interactions are presented with the framework of the Compressed Baryonic Matter (CBM) experiment at FAIR as a part of "QCD at FAIR" initiative. Using realistic CBM simulation data for high-rate proton-proton collisions, we investigate ΛΛ and Σ⁺Σ⁺ systems. We emphasize on interaction signatures such as cusp effects and near-threshold structures, explored using dispersion-relation-based approaches based up on Monte Carlo simulations of exclusive reaction channels. The presented results establish a solid methodological foundation for future measurements with CBM and illustrate its potential to provide crucial experimental constraints on hyperonic interactions relevant for neutron-star matter.

Keywords: Hyperons; hyperonic-interactions; Neutron stars; multi-strangeness; proton-proton collisions