Dashen's theorem and electromagnetic masses of the mesons
classification
✦ hep-ph
keywords
mesonsdashentheoremaxial-vectorchiralelectromagneticemployingfails
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Employing $U(3)_L\times U(3)_R$ chiral field theory, we find that Dashen's theorem, which holds for pseudoscalar mesons, can be generalized to the sector of axial-vector mesons, however, fails for vector mesons.
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