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Mainz 2022 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 57: Heavy-Ion Collisions and QCD Phases XII

HK 57.5: Talk

Thursday, March 31, 2022, 15:00–15:15, HK-H2

Accessing the coupled-channel dynamics with two-particle correlations at ALICE — •Valentina Mantovani Sarti for the ALICE collaboration — TUM, Garching, Germany

The strong interaction between hadrons can be characterised by the so-called coupled-channel dynamics, responsible for inelastic processes such as absorption and annihilation. The strength of the coupling to the inelastic channels can lead to the formation of molecular states, such as the Λ(1405) in the KN–Σπ system and it also plays a crucial role in the possible existence of new bound states, as it might occurs in baryon-antibaryon interaction.

Measurements of two-particle correlations in the relative momentum space performed in different colliding systems and probing different inter-particle distances opens the possibility to partially isolate the elastic interaction and to provide experimental constraints for the coupling to the inelastic channels. In this talk we will present results on the coupled-channel dynamics of KN interaction, and on the annihilation processes in p-p, p-Λ and p-Λ interactions obtained in pp, p–Pb and Pb–Pb collisions. The effect of inelastic contributions in these systems has been investigated within the C3ATS framework.

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