Resurrection of a symmetry in nucleon-nucleus scattering

We reexamine a symmetry in nucleon-nucleus scattering that previously had b een proclaimed to be dead. We show that this symmetry is the continuum anal og of pseudospin symmetry, a relativistic symmetry which manifests itself i n the spectra of nuclei. Usings experimental data only, we show that pseudo spin symmetry in nucleon-nucleus scattering is not dead but only modestly b roken for 800 MeV proton scattering on nuclei. [S0031-9007(99)09284-4].