Frankfurt 2014 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 60: Hadronenstruktur und -spektroskopie

HK 60.5: Talk

Friday, March 21, 2014, 15:15–15:30, HZ 3

Search for the kaonic bound state ppK⁻ in pp→ p K⁺Λ* — •Robert Muenzer — Excellence Cluster Universe, TU-München, Boltzmannstrasse 2, D-85748 Garching

The investigation of the kaon-nucleon interaction has been intensified in the last year due to new results on Λ(1405) (1) and indications on the existence of the ppK⁻ bound state (2). Such results are heavily discussed among the community since the description of the background needs a good knowledge of the underling production reaction in the reaction pp→ p K⁺Λ.
We have measured the proton-proton reaction with a beam energy of 3.1 GeV at the FOPI Spectrometer at GSI-Darmstadt. At this experiment a set of around 1000 events of these exclusive reaction pp→ p K⁺Λ could be extracted.
This exclusive events were analysis with the Bonn Gatchina Partial Wave Analysis framework (3), which provides a solution including several resonant and non-resonant production mechanism and their interference. This description delivers a sufficient description of experimental data and a determination of possible contribution of ppK⁻.
In this talk method of the background description via the PWA and the determination of an upper limit for the ppK⁻ will be presented.
(1) L. Fabbietti, J. Siebenson / arXiv:1208.0205
(2) T. Yamazaki, M. Maggiora, P. Kienle / PRL 104 / 132502 (2010)
(3) Sarantsev, A., Chin.Phys.,C33,1085-1092
*supported by Helmholz fonds VH-NG-330