TTP01-35 Measurement of K- p to eta Lambda near threshold

We present measurements of the differential and total cross sections and the Lambda polarization for the reaction K- p to eta Lambda from threshold to pK- = 770 MeV/c, with much better precision than previous measurements. Our cross-section data show a remarkable similarity to the SU(3) flavor-related pi- p to eta n cross-section results. The reaction K- p to eta Lambda at threshold is dominated by formation of the intermediate Lambda(1670)1/2- state.