Study of the eta-proton interaction via the reaction p p --> p p eta

Moskal, P.; Adam, H. H.; Budzanowski, A.; Czyzykiewicz, R.; Gotz, T.; Grzonka, D.; Jarczyk, L.; Khoukaz, A.; Kilian, K.; Kolf, C.; Kowina, P.; Lang, N.; Lister, T.; Oelert, W.; Quentmeier, C.; Santo, R.; Schepers, G.; Sefzick, T.; Siemaszko, M.; Smyrski, J.; Steltenkamp, S.; Strzalkowski, A.; Winter, P.; Wolke, M.; Wustner, P.; Zipper, W.

Study of the eta-proton interaction via the reaction p p --> p p eta

Authors

Description

A measurement of the pp --> p p eta reaction at the excess energy of Q = 15.5 +- 0.4 MeV has been carried out at the internal beam facility COSY-11 with an integrated luminosity of 811 nb^-1 The number of ~24000 identified events permits a precise determination of total (2.32 +- 0.05 +- 0.35 μb) and differential cross sections. Preliminary investigations show that the angular distribution of the eta meson in the center-of-mass system is isotropic. A qualitative analysis of the Dalitz-plot distribution is presented.
3pp, Talk given at 9th International Symposium on Meson - Nucleon Physics and the Structure of the Nucleon (MENU 2001), Washington, District of Columbia, 26-31 Jul 2001. To be published in pN Newsletter 16 (2001)