Properties of theK*(890)andK*(1420)inK−pInteractions at 3.9 and 4.6 GeV/c

Abstract

Results are presented on the production and decay properties of the $K\left(890\right)\mathrm{}$ and $K\left(1420\right)\mathrm{}$ mesons as observed in $K^{-}p$ interactions at 3.9 and 4.6 GeV/c. In addition, data on the elastic and charge-exchange reactions are also included. Total and differential cross sections, density-matrix elements, and $S-P$-wave interference effects are discussed in detail for both neutral and charged modes of the $K\left(890\right)\mathrm{}$. A measurement of the mass difference and comparison between the production properties of these two modes are presented. The mass and width parameters of the $K\left(1420\right)\mathrm{}$ meson and the possibility of the presence of more than one resonance in the 1400-MeV mass region are investigated. Branching ratios, total and differential cross sections, and a spin-parity determination are discussed.