Generalizations of the Sugawara Model

Abstract

Two generalizations of Sugawara models are discussed. In the first, new interactions are introduced by altering the current commutators but retaining the "free" form of T_(μν), as exemplified by a simple effective π^0 − 2γ interaction, which is compared with the standard triangle-diagram results. The second permits non-quadratic T_(μν), which retain the "algebra" part of the current commutators; these models avoid the Dashen-Frishman parity degeneracy.

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