Resonances in positronium hydride

We reexamine the problem of calculating the positions and widths of the lowest-lying resonances in the Ps+H scattering system that consists of two electrons, one positron and one proton. The first of these resonances, for L=0, was found by the methods of complex rotation and stabilization, and later described as a Feshbach resonance lying close to a bound state in the closed-channel e⁺+H^- system. Recently, results for the L=1 and 2 scattering states were published, and it was found, surprisingly, that there is a large shift in the positions of these resonances. In this paper we repeat the analysis for L=1 and find an unexpected explanation for the shift.