Invariant mass distributions for the pp to p p eta reaction at Q=10 MeV

P. Moskal; R. Czyzykiewicz; E. Czerwinski; D. Gil; D. Grzonka; L. Jarczyk; B. Kamys; A. Khoukaz; J. Klaja; P. Klaja; W. Krzemien; W. Oelert; J. Ritman; T. Sefzick; M. Siemaszko; M. Silarski; J. Smyrski; A. Taschner; M. Wolke; P. Wustner; J. Zdebik; M. J. Zielinski; W. Zipper

doi:10.1140/epja/i2009-10900-9

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arXiv · 0912.1592

Invariant mass distributions for the pp to p p eta reaction at Q=10 MeV

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Abstract

Proton-proton and proton-eta invariant mass distributions and the total cross section for the pp to pp eta reaction have been determined near the threshold at an excess energy of Q=10 MeV. The experiment has been conducted using the COSY-11 detector setup and the cooler synchrotron COSY. The determined invariant mass spectra reveal significant enhancements in the region of low proton-proton relative momenta, similarly as observed previously at higher excess energies of Q=15.5 MeV and Q= 40MeV.

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P. Moskal, R. Czyzykiewicz, E. Czerwinski, D. Gil, D. Grzonka, L. Jarczyk, B. Kamys, A. Khoukaz, J. Klaja, P. Klaja, W. Krzemien, W. Oelert, J. Ritman, T. Sefzick, M. Siemaszko, M. Silarski, J. Smyrski, A. Taschner, M. Wolke, P. Wustner, J. Zdebik, M. J. Zielinski, W. Zipper. 2009-12-08. Invariant mass distributions for the pp to p p eta reaction at Q=10 MeV. https://doi.org/10.1140/epja/i2009-10900-9

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