arXiv:1509.04830·v2·Nuclear Experiment
Kaon pair production in proton-nucleus collisions at 2.83 GeV kinetic energy
Yu.T. Kiselev🇷🇺 · M. Hartmann · A. Polyanskiy🇩🇪 · E.Ya. Paryev🇷🇺 · S. Barsov🇷🇺 · M. Buescher · S. Dymov🇷🇺 · R. Gebel🇯🇵 · V. Hejny🇯🇵 · A. Kacharava🇯🇵 · I. Keshelashvili🇯🇵 · B. Lorentz🇯🇵
Abstract
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.
Comments: 7 pages, 5 figures, 1 table