/ 97 02 31 6 v 1 1 2 Fe b 19 97 τ → η ( η ′ ) 2 πν , 3 πν and WZW anomaly
نویسنده
چکیده
The effects of the anomalous contact terms L η(η ′)ρππ are taken into account in calculating the decay rates of τ → η(η ′)ππν. The branching ratio of τ → ηπππν is calculated. Theoretical result agrees with the data. It is the first time that the anomalous Wess-Zumino-Witten vertex ηaa is tested. A a 1 resonance is predicted in the final state of the three pions. The prediction of the branching ratio of τ → η ′ πππν is presented.
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