We comment on some work of Rosenzweig, Schecter, and Trahern who construct an effective Lagrangian for quantum chromodynamics involving a pseudoscalar ghost glueball field. We point out that a successful description of pseudoscalar mixing we wrote down some years ago indeed requires a pseudoscalar ghost.

• Received 31 December 1979

DOI:https://doi.org/10.1103/PhysRevD.22.223