Structures inK±-Nucleon Total Cross Sections between 0.9 and 2.4 GeV/c

Abstract

Total cross sections of ${\pi }^{\pm }$ and $K^{\pm }$ on hydrogen and deuterium were measured in a standard transmission experiment in the momentum range 0.9-2.4 GeV/c at 50-MeV/c intervals with statistical precisions in the range of 0.2-1.0%. Cross sections for pure isotopic spin states were obtained using a procedure for the deuterium data which takes into account Fermi motion and the shadow effect. This procedure was tested on the pion data before applying it to kaons. Evidence for the following new structures was found: ${Y_0}^{*}\mathrm{}\left(2107\right)\mathrm{}$, ${Y_0}^{*}\mathrm{}\left(2344\right)\mathrm{}$, ${Y_1}^{*}\mathrm{}\left(1912\right)\mathrm{}$, ${Y_1}^{*}\mathrm{}\left(2025\right)\mathrm{}$, ${Y_1}^{*}\mathrm{}\left(2255\right)\mathrm{}$, ${Z_0}^{*}\mathrm{}\left(1780\right)\mathrm{}$, and ${Z_1}^{*}\mathrm{}\left(1900\right)\mathrm{}$.