On the role of $a_1(1260)$ meson in the $τ\to 4πν_τ$ decay

Details On the role of $a_1(1260)$ meson in the $τ\to 4πν_τ$ decay On the role of $a_1(1260)$ meson in the $τ\to 4πν_τ$ decay

1999-07-09

arxiv.org/abs/hep-ph/9907283v1

Phys.Lett.B466:403-407,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 10 figures, LaTex

Scientific paper

10.1016/S0370-2693(99)01081-3

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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