ar X iv : h ep - p h / 01 07 17 5 v 1 1 6 Ju l 2 00 1 η - η ′ mixing in U ( 3 ) chiral perturbation theory 1
نویسندگان
چکیده
We investigate η-η ′ mixing in infrared regularized U (3) chiral perturbation theory by calculating the η and η ′ masses up to one-loop order. From this analysis it becomes obvious that even at leading order η-η ′ mixing does not obey the usually assumed one-mixing angle scheme if large N c counting rules are not employed.
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