Eta-eta' mixing in U(3) chiral perturbation theory
arXiv:hep-ph/0107175 · doi:10.1007/s100500170072
Abstract
We investigate eta-eta' mixing in infrared regularized U(3) chiral perturbation theory by calculating the eta and eta' masses up to one-loop order. From this analysis it becomes obvious that even at leading order eta-eta' mixing does not obey the usually assumed one-mixing angle scheme if large N_c counting rules are not employed.
22 pages