Strong anomaly andη→3πdecay

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1 September 1980

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

Vol. 22 (5) , 1124-1127
https://doi.org/10.1103/physrevd.22.1124

Abstract

The amplitude for

η \to 3 π

is calculated in terms of the amplitude for

η^{'} \to η π π

using the strong anomaly and the partial conservation of the U(1) current. The isospin violation, an

\frac{(m_{u} - m_{d})}{(m_{u} + m_{d})}

effect, is large. The

η^{'}

decay constant is estimated from

ψ \to η^{'} γ

. The result for

η \to 3 π

is in good agreement with experiment.

Keywords

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