Study of Excited Ξ Baryons in p?p-Collisions with the ANDA Detector

FAIRNESS 2016

Pütz, Jennifer^1 ; Gillitzer, Albrecht^1 ; Ritman, James^1 ; Stockmanns, Tobias^1

Institut für Kernphysik, Forschungszentrum Jülich, Jülich

52425, Germany^1

关键词: Baryon spectroscopy;    Excitation pattern;    Excitation spectrum;    PANDA detectors;    Perturbative QCD;    Pp collisions;    Production rates;    Proton collisions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/742/1/012028/pdf
DOI  :  10.1088/1742-6596/742/1/012028

来源: IOP

【 摘 要 】

Understanding the excitation pattern of baryons is indispensable for the understanding of non-perturbative QCD. Up to now only the nucleon excitation spectrum has been subject to systematic experimental studies, while very little is known on excited states of double or triple strange baryons. In studies of antiproton-proton collisions, the PANDA experiment is well-suited for a comprehensive baryon spectroscopy program in the multi-strange and charm sector. In the present study we focus on excited Ξ-states. For final states containing a Ξ-Ξ+pair, cross sections of the order of μb are expected, corresponding to production rates of ∼ 106/d at a luminosity L = 1031cm-2s-1. Here we present the reconstruction of the reaction pp → Ξ (1820)-Ξ+with Ξ (1820)-→ Λ K-and its charged conjugate channel with the PANDA detector.