Energy Dependence of the Near-Threshold Total Cross-Section for the pp --> pp eta' Reaction

P. Moskal; H. -H. Adam; J. T. Balewski; V. Baru; A. Budzanowski; D. Grzonka; J. Haidenbauer; L. Jarczyk; A. Khoukaz; K. Kilian; M. Koehler; P. Kowina; A. Kudryavtsev; N. Lang; T. Lister; W. Oelert; C. Quentmeier; R. Santo; G. Schepers; T. Sefzick; S. Sewerin; M. Siemaszko; J. Smyrski; A. Strzalkowski; M. Wolke; P. Wuestner; W. Zipper

doi:10.1016/s0370-2693(00)00039-3

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Energy Dependence of the Near-Threshold Total Cross-Section for the pp --> pp eta' Reaction

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Abstract

Total cross sections for the pp --> pp eta' reaction have been measured in the excess energy range from Q = 1.53 MeV to Q = 23.64 MeV. The experiment has been performed at the internal installation COSY-11 using a stochastically cooled proton beam of the COoler SYnchrotron COSY and a hydrogen cluster target. The determined energy dependence of the total cross section weakens the hypothesis of the S-wave repulsive interaction between the eta' meson and the proton. New data agree well with predictions based on the phase-space distribution modified by the proton-proton final-state-interaction (FSI) only.

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P. Moskal, H. -H. Adam, J. T. Balewski, V. Baru, A. Budzanowski, D. Grzonka, J. Haidenbauer, L. Jarczyk, A. Khoukaz, K. Kilian, M. Koehler, P. Kowina, A. Kudryavtsev, N. Lang, T. Lister, W. Oelert, C. Quentmeier, R. Santo, G. Schepers, T. Sefzick, S. Sewerin, M. Siemaszko, J. Smyrski, A. Strzalkowski, M. Wolke, P. Wuestner, W. Zipper. 2000-01-01. Energy Dependence of the Near-Threshold Total Cross-Section for the pp --> pp eta' Reaction. https://doi.org/10.1016/s0370-2693(00)00039-3

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