Mainz 2022 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 32: Hadron Structure and Spectroscopy VI

HK 32.5: Talk

Tuesday, March 29, 2022, 17:15–17:30, HK-H9

Lower-order contributions in three-particle femtoscopic correlation functions — •Philipp Schulze-Hagen — TUM, Munich, Germany

In recent years, the femtoscopy technique has been used by the ALICE Collaboration in small colliding systems at the LHC to investigate the strong interaction between hadron pairs. The extension of this experimental technique to the three-particle case aims to deliver the first measurements of genuine three-hadron interactions in the next years. To this end, the two-body effects in the three-particle correlation functions have to be properly accounted for. A recently introduced approach, known as the projector method, combined with the cumulant expansion rule, allows the calculations of such lower-order contributions by projecting known two-particle correlation functions on the three-body phase space. In this work, the relativistic generalization of the projector method will be presented and discussed in the specific case of p–p–π⁻ and p–p–π⁺. It will be shown, in particular, that such method provides significantly smaller uncertainties with respect to the standard data-driven approaches in the extraction of the signal due to the genuine three-particle correlations.