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On the role of $a_1(1260)$ meson in the $\tau\to 4\pi\nu_{\tau}$ decay
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abstract
We demonstrate that a simple model successfully describing experimental data for the process $\epm\to 4\pi$ can also qualitatively account for the data of CLEOII and ALEPH obtained recently for the decay $\tau\to 4\pi\nu_{\tau}$. The model is based on the assumption of the $a_1(1260)\pi$ and $\omega\pi$ dominance as intermediate states. Our observation is in contrast with the claim by ARGUS that the $\rho$-meson signal in the $\tau\to 4\pi\nu_\tau$ decay can not be explained by the $a_1\pi$ intermediate state.
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