Kaon pair production in proton-nucleus collisions at 2.83 GeV kinetic energy
Kiselev, Yu. T. · Hartmann, M. · Polyanskiy, A. · Paryev, E. Ya. · Barsov, S. · Buescher, M. · Dymov, S. · Gebel, R. · Hejny, V. · Kacharava, A. · Keshelashvili, I. · Lorentz, B. · Maeda, Y. · Merzliakov, S. · Mikirtytchiants, S. · Ohm, H. · Serdyuk, V. · Sibirtsev, A. · Sinitsyna, V. Y. · Stein, H. J. · Stroeher, H. · Trusov, S. · Valdau, Yu. · Wilkin, C. · Wuestner, P. · Ye, Q. J.
Original · EN
The production of non-phi K+K- pairs by protons of 2.83 GeV kinetic energy on C, Cu, Ag, and Au targets has been investigated using the COSY-ANKE magnetic spectrometer. The K- momentum dependence of the differential cross section has been measured at small angles over the 0.2--0.9 GeV/c range. The comparison of the data with detailed model calculations indicates an attractive K- -nucleus potential of about -60 MeV at normal nuclear matter density at a mean momentum of 0.5 GeV/c. However, this approach has difficulty in reproducing the smallness of the observed cross sections at low K- momenta.
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