STUDY OF THE LOW ENERGY DYNAMICS IN THE ppK~+K~- SYSTEM WITH THE COSY-11 MAGNETIC SPECTROMETER

摘要

The near threshold production of K~+K~- pairs in proton-proton collisions has been investigated at the cooler synchrotron COSY below and above the threshold for the Φ meson. The experimental excitation function determined for the pp → ppK~+K~- reaction differs from theoretical expectations including proton-proton final state interaction. The discrepancy may be assigned to the influence of K~+K~- or pK~- interaction. In this article we present distributions of the cross-section for the pp → ppK~+K~-reaction as a function of the invariant masses of two and three particle subsystems at excess energies of Q = 10 MeV and 28 MeV.