Mainz 2022 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 72: Hadron Structure and Spectroscopy XII

HK 72.4: Vortrag

Donnerstag, 31. März 2022, 17:00–17:15, HK-H8

Proton-φ interaction studied in pp collisions with ALICE at the LHC — •Emma Chizzali for the ALICE collaboration — TUM, Munich, Germany

In order to constrain the equation of state of dense objects like neutron stars (NS) and subsequently solve the puzzle about their content, it is fundamental to understand the interaction between their hypothetical constituents. Hyperons might be contained in the core of NS which makes the hyperon-hyperon interaction relevant with the φ vector meson as effective exchange particle. Additionally, it is an interesting particle regarding the partial restoration of chiral symmetry in the nuclear medium. For such investigations it is relevant to constrain the vacuum properties of the interaction between the φ meson and nucleons. This can be studied experimentally by measuring the correlation function between proton and φ meson employing the femtoscopy technique in small collision systems. The small source size in HM pp collisions at the Large Hadron Collider at √s = 13 TeV makes it possible to study short-ranged strong potentials with unprecedented precision. The data used to derive the correlation function is measured by the ALICE experiment and corrected for non-genuine contributions. Finally, it is found to reflect the pattern of an attractive force between proton and φ meson and employed to extract the scattering parameters of the interaction.