On the large-Nc behavior of the L7 coupling in
Abstract
It is shown that the usual large-Nc counting of the coupling constant L7 of the O(p4) low-energy chiral SU(3) Lagrangian GL85 is in conflict with general properties of QCD in the large-Nc limit. The solution of this conflict within the framework of a chiral U(3) Lagrangian is explained.
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