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- Title
HADRONIC INTERACTION OF THE η MESON WITH TWO NUCLEONS.
- Authors
Moskal, P.; Adam, H.-H.; Budzanowski, A.; Czyzykiewicz, R.; Grzonka, D.; Janusz, M.; Jarczyk, L.; Kamys, B.; Khoukaz, A.; Kiuan, K.; Klaja, P.; Majewski, J.; Oelert, W.; Piskor-Ignatowicz, C.; Przerwa, J.; Rozek, T.; Sefzick, T.; Siemaszko, M.; Smyrski, J.; Taschner, A.
- Abstract
The COSY-11 collaboration has conducted experiments aiming at the determination of the excitation function and phase-space population of the pp → ppη reaction close to the kinematical threshold. The precise data obtained with the stochastically cooled proton beam of the cooler synchrotron COSY and the high resolution zero-degree magnetic spectrometer allowed for the observation of the significant deviations -- in the shape of the excitation function and two-particle invariant masses -- from the predictions based on the assumption that the reaction phase space is homogenously populated. Comparison of the shape of the excitation function for the pp → ppη and pp → ppη' reaction allows to distinquish in the model independent way an influence originating from the proton-η proton and proton-η interaction. For the comparison the full data set from experiments performed at COSY and other laboratories is used.
- Subjects
HADRONS; PARTICLES (Nuclear physics); SYNCHROTRONS; PROTON beams; LABORATORIES; PARTICLE accelerators
- Publication
International Journal of Modern Physics A: Particles & Fields; Gravitation; Cosmology; Nuclear Physics, 2005, Vol 20, Issue 8/9, p1880
- ISSN
0217-751X
- Publication type
Article
- DOI
10.1142/S0217751X05023542