München 2019 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 54: Poster

HK 54.4: Poster

Thursday, March 21, 2019, 16:30–19:00, Foyer Theresanium

Proton-Xi interaction studied via the femtoscopy method in p-Pb collisions measured by ALICE — •Bernhard Hohlweger for the ALICE collaboration — TU Munich, Physics Department E62, ExcellenceCluster Universe Garching

Femtoscopic studies of Baryon-Baryon pairs opens a new era of studying two particle interactions at colliders. In particular, small collision systems prove to be particularly well suited to probe the short-ranged strong potentials. Experimental data are compared to local potentials with the newly developed Correlation Analysis Tool using the Schrödinger Equation (CATS). This analysis is based on the data measured by the ALICE Collaboration from p-Pb collisions at 5.02 TeV and the correlation function is obtained for pairs of protons and Ξs. For the first time, an attractive strong interaction is observed between the two particles is observed with a significance of more than 3σ. Lattice calculations by the HAL QCD to model the latter are validated and are used to explore the implications of including the newly found attractive p-Ξ interaction in the description of neutron stars.