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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 ppp 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 ppp 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

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