Bonn 2020 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 3: Hadron Structure and Spectroscopy II

HK 3.2: Vortrag

Montag, 30. März 2020, 17:00–17:15, J-HS M

Investigation of Excited Ξ Baryon States in pp Collisions with PANDA — •Jennifer Pütz, Albrecht Gillitzer, James Ritman, and Tobias Stockmanns — Forschungszentrum Jülich, Jülich, Deutschland

Understanding the excitation pattern of baryons is essential for a deeper insight into the mechanisms of QCD in the non-perturbative regime. Up to now, there is an ongoing worldwide effort on studies of the nucleon excitation spectrum, but our knowledge on excited states of double or triple strange baryons is still rather poor. Combining the antiproton-proton initial states and the capabilities of the detector, the PANDA experiment is well-suited for a comprehensive baryon spectroscopy program in the multi-strange sector. A large fraction of the inelastic pp cross section is associated to final states with a baryon-antibaryon pair together with additional mesons, giving access to excited states both in the baryon and the antibaryon channel. This study focuses on excited Ξ states, in particular the Λ K or Λ K+ decay of these states are investigated. A cross section in the order of µb, corresponding to production rates of ∼ 106/d at a Luminosity L=1031 cm−2  s−1 (5% of the design value), are expected for final states containing a Ξ+Ξ pair. MC studies to identify the Ξ+Λ KΛ K+) final state and resonant Ξ(Ξ+) states with the PANDA detector and strategies to determine the spin and parity quantum numbers of specific Ξ(Ξ+) states will be presented.

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