More About the Light Baryon Spectrum

We discuss the light baryon spectrum obtained from a recent quark–diquark calculation, implementing non-pointlike diquarks that are self-consistently calculated from their Bethe–Salpeter equations. We examine the orbital angular momentum content in the baryons' rest frame and highlight the fact that baryons carry all possible values of L compatible with their spin, without the restriction P=(−1)^L which is only valid nonrelativistically. We furthermore investigate the meaning of complex conjugate eigenvalues of Bethe–Salpeter equations, their possible connection with 'anomalous' states, and we propose a method to eliminate them from the spectrum. (author)