Generalized Gordon Identities, Hara Theorem and Weak Radiative Hyperon Decays

Abstract

It is shown that an alternative form of the parity-nonconserving (PNC) transition electromagnetic current resolves partly a puzzle with the Hara theorem. New formulation of it has allowed PNC weak radiative hyperon transitions of the charged hyperons ${\Sigma }^{+}\Rightarrow p+\gamma$ and ${\Xi }^{-}\Rightarrow {\Sigma }^{-}+\gamma$ revealing hitherto unseen transition toroid dipole moment.

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