Heidelberg 2015 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 48: Poster
HK 48.11: Poster
Mittwoch, 25. März 2015, 17:00–19:00, C/Foyer
The Search for a πΛ N−πΣ N Resonance in pp@3.5 GeV* — •Jia-Chii Berger-Chen for the HADES collaboration — Physik Department E12 and Excellence Cluster “Universe”, Technische Universität München, 85748 Garching, Germany
Inspired by recent relativistic three-body Fadeev calculations by Garcilazo and Gal [1] predicting a possible existence of a πΛ N−πΣ N resonance, an experimental analysis was started to search for this state in p+p reactions at Ekin = 3.5 GeV recorded with the HADES experiment (GSI, Darmstadt, Germany). This hypothetical resonance can be denoted as a Y dibaryon with the quantum numbers (Y,I,JP) = (1,3/2,2+) and seen as a quasibound state of Σ(1385)N−Δ(1232)Y (N = nucleon, Y = hyperon) with a binding energy of about 50 MeV. The analysis exploits the unique decay of the double charged Y into a Σ+ and a proton in the reaction p+p→ Y+++K0 and the knowledge gained in the exclusive analysis of K0 channels associated with resonances [2]. The contribution includes a description of the analysis as well as preliminary results.
1H. Garcilazo and A. Gal, Nucl. Phys. A 897:167-178 (2013).
2G. Agakishiev et al. (HADES), Phys. Rev. C 90:015202 (2014).
*supported by BMBF (05P12WOGHH), Excellence Cluster “Universe” and the TUM Graduate School