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arXiv · 0811.4303

Measurement of the pn -> dK^+K^- total cross section close to threshold

Y. Maeda·M. Hartmann·I. Keshelashvili·S. Barsov·M. Buescher·A. Dzyuba·S. Dymov·V. Hejny·A. Kacharava·V. Kleber·V. Koptev·P. Kulessa·T. Mersmann·S. Mikirtytchiants·A. Mussgiller·M. Nekipelov·H. Ohm·K. Pysz·H. J. Stein·H. Stroeher·Yu. Valdau·C. Wilkin·P. Wuestner
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Abstract

Measurements of the pn -> p_spec dK^+K^- reaction, where p_spec is a spectator proton, have been undertaken at the Cooler Synchrotron COSY-Juelich by detecting a fast deuteron in coincidence with a K^+K^- pair in the ANKE facility. Although the proton beam energy was fixed, the moving target neutron allowed values of the non-resonant quasi-free pn -> dK^+K^- total cross section to be deduced up to an excess energy epsilon ~ 100 MeV. Evidence is found for the effects of K^-d and KKbar final state interactions. The comparison of these data with those of pp -> ppK^+K^- and pp -> dK^+Kbar shows that all the total cross sections are very similar in magnitude.

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Y. Maeda, M. Hartmann, I. Keshelashvili, S. Barsov, M. Buescher, A. Dzyuba, S. Dymov, V. Hejny, A. Kacharava, V. Kleber, V. Koptev, P. Kulessa, T. Mersmann, S. Mikirtytchiants, A. Mussgiller, M. Nekipelov, H. Ohm, K. Pysz, H. J. Stein, H. Stroeher, Yu. Valdau, C. Wilkin, P. Wuestner. 2008-11-26. Measurement of the pn -> dK^+K^- total cross section close to threshold. https://doi.org/10.1103/physrevc.79.018201

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