Ambiguity in antiproton-nucleus potentials from antiprotonic-atom data

We show that the p̄-atomic data for p̄+ ¹²C, ¹⁶O, S, and ⁸⁹Y do not yield unique p̄-nucleus potentials. Two families of potentials are found, one with shallow imaginary and deep real parts and one with deep imaginary and shallow real parts. We examine some possible consequences for the n-n̄ oscillation time, for p̄-nuclear bound states, and for p̄-nucleus scattering.