München 2006 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 23: Elektromagnetische und Hadronische Sonden
HK 23.4: Vortrag
Dienstag, 21. März 2006, 17:45–18:00, G
Analysing power Ay for the p→p→ ppη reaction at Q=10 MeV — •Rafal Czyzykiewicz — Jagellonian University, Kraków, Poland
A new set of analysing power data [1] for the p→p→ ppη reaction at an excess energy of Q=10 MeV, as measured by the COSY-11 collaboration, will be presented and confronted with theoretical calculations [2,3]. According to these recent results, along with the data of the hitherto performed measurements at the excess energy of Q=40 MeV [4] it is for the first time possible to set up the priorities to the above cited theoretical models, which are based on different assumptions concerning the excitation of the S11(1535) resonance, leading to the creation of the η meson in the close-to-threshold proton-proton collisions.
[1] COSY-11: R. Czyżykiewicz et al., in preparation.
[2] K. Nakayama et al., Phys. Rev. C 65 (2002) 045210.
[3] G. Fäldt and C. Wilkin, Phys. Scripta 64 (2001) 427.
[4] COSY-11: P. Winter et al., Phys. Lett. B 544 (2002) 251;
erratum-ibid. B 553 (2003) 339.
Supported by FZ-Jülich and DAAD.