pi0-eta Mixing and CP Violation
G. Ecker, G. Mueller, H. Neufeld, A. Pich
Abstract
We discuss π0 -η mixing and its implication for ε'/ ε to next-to-leading order in the low-energy expansion. The big effect due to η-η' mixing is shown to be largely cancelled by other contributions occurring at the same order in the chiral expansion.
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