Low-EnergyΛ-Proton Elastic Scattering

The cross sections for $\Lambda -p$ elastic scattering with $\Lambda$ momenta in the interval $110-330 \frac{\mathrm{MeV}}{c}$ have been measured. Our results are based on 224 scattering events found in a sample of 95 600 $\Lambda$ hypersons observed in an exposure of the 81-cm Saclay hydrogen bubble chamber to a stopping $K^{-}$ beam. These cross sections are analyzed in terms of effective-range theory. A wide spectrum of solutions in this formalism give acceptable agreement with the data.