München 2019 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 33: Hadron Structure and Spectroscopy V

HK 33.1: Gruppenbericht

Mittwoch, 20. März 2019, 14:00–14:30, HS 13

Perspectives for Ξ Baryon Spectroscopy in pp Collisions with the PANDA Detector — •Albrecht Gillitzer, Alessandra Lai, Jennifer Pütz, James Ritman, and Tobias Stockmanns for the PANDA collaboration — Forschungszentrum Jülich, Jülich, Deutschland

Due to the lack of experimental data, our knowledge of the excitation spectrum of double strange baryons is very poor. While within SU(3) flavor symmetry the Ξ baryon spectrum should have as many states as the N and Δ spectrum together, only a few Ξ^* states have been established, most of them without spin parity quantum number assignment. An extension of the data base on baryon resonances to the (multi-)strangeness sector is however important to scrutinize the theoretical models based on studies of the N and Δ spectrum. The pp entrance channel has a relatively large cross section for the production of double strange (anti-)baryons in the final state. The corresponding high production rates together with the large detector acceptance for both charged and neutral particles make the PANDA experiment the ideal place for Ξ spectroscopy. An important part of the PANDA physics program is therefore devoted to the study of the Ξ spectrum. Results of feasibility studies to identify Ξ^* resonances in the final states Ξ⁺ Λ K⁻ (and its charge conjugate), Ξ⁺ Ξ⁻ π⁰, and Ξ⁺ Ξ⁻ π⁺ π⁻ will be reported, and the perspective of studying further decay modes will be discussed.