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19 April 2024

» arxiv » hep-ex/0411052

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Hadronic interaction of the eta meson with two nucleons
P. Moskal ; H.-H. Adam ; A. Budzanowski ; R. Czyzykiewicz ; D. Grzonka ; M. Janusz ; L. Jarczyk ; B. Kamys ; A. Khoukaz ; K. Kilian ; P. Klaja ; J. Majewski ; W. Oelert ; C. Piskor-Ignatowicz ; J. Przerwa ; T. Rozek ; T. Sefzick ; M. Siemaszko ; J. Smyrski ; A. Taschner ; P. Winter ; M. Wolke ; P. Wustner ; W. Zipper ;
Date:	16 Nov 2004
Journal:	Int.J.Mod.Phys. A20 (2005) 1880-1883
Subject:	hep-ex
Affiliation:	Jagellonian U. & Munster U. & Cracow, INP & Julich, Forschungszentrum & Silesia U.
Abstract:	The COSY-11 collaboration has conducted experiments aiming at the determination of the excitation function and phase-space population of the p p --> p p eta 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 p p --> p p eta and p p --> p p eta-prime reaction allows to distinquish in the model independent way an influence originating from the proton-proton and proton-eta interaction. For the comparison the full data set from experiments performed at COSY and other laboratories is used.
Source:	arXiv, hep-ex/0411052
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