Asymptotic Symmetry, Particle Mixing, and $K_{l 3}$ -Decay Branching Ratios

Publisher Website

6 July 1970

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 25 (1) , 71-73
https://doi.org/10.1103/physrevlett.25.71

Abstract

A concept of asymptotic symmetry is formulated and applied to the determination of mixing parameters between the

π^{0}

,

η^{0}

, and

η^{'^{0}} (958)

in broken SU(3) and SU(2) symmetries. One of the solutions gives rise to a rather large violation of the

| Δ \vec{I} | = \frac{1}{2}

rule in the

K_{l 3}

decays which is not inconsistent with present experiment.

Keywords

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