Low-Energy (Σ+,p) and (Σ−,p) Elastic Scattering

The cross sections for the elastic scattering of ${\Sigma }^{+}$ and ${\Sigma }^{-}$ hyperons on protons have been measured. The hyperons were produced by the interactions of stopping $K^{-}$ mesons in a hydrogen bubble chamber. The cross section for (${\Sigma }^{-},p$) elastic scattering is 166±33 mb, at a mean laboratory momentum of 150 $\frac{\mathrm{MeV}}{c}$. The cross section for (${\Sigma }^{+},p$) elastic scattering is 84±34 mb at a mean laboratory momentum of 161.5 $\frac{\mathrm{MeV}}{c}$. These measurements, as well as the results of similar experiments, are compared with several recent theoretical predictions of hyperon-nucleon scattering cross sections.