Münster 2011 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

HK: Fachverband Physik der Hadronen und Kerne

HK 43: Hadronenstruktur und -spektroskopie VIII

HK 43.3: Vortrag

Mittwoch, 23. März 2011, 17:00–17:15, HS3

Search for ppK⁻-state in p-p@3,1 GeV — •Robert Münzer — Excellence Cluster Universe, TU-München, Boltzmannstrasse 2, D-85748 Garching

The investigation of the kaon-nucleon interaction has been intensified in the last year thanks to new results on Λ(1405) (1,2) and indication on the existance of the ppK⁻ bound state (3).
At the FOPI Specrometer at GSI we are investigating the possible creation of the ppK⁻ state in proton-proton-collisions at 3.1 GeV. This reaction should favour the formation of the ppK⁻, according to some theoretical predictions (4).
The experiment was carried out with a 3.1 GeV proton beam focused on a 2cm LH₂-Target. Additional to the FOPI Setup, a silicon detector system was used to enhance events containing Λ and improve the tracking in the target region. About 100· 10⁶ events were collected after the second level trigger selection.
This contribution will show the actual status of the analysis with a particular focus on the techniques used to improve momentum resolution by particle tracking and the reconstruction of Λs in the forward direction.
(1) J. Siebenson, L. Fabbietti / in press.
(2) K. Moriya, R. Schumacher / arXiv:0911.2705v1
(3) T. Yamazaki, M. Maggiora, P. Kienle / PRL 104 / 132502 (2010)
(4) T. Yamazaki, Y. Akaishi / PRC 76 / 045201 (2007)