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ISSN - 03702693, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 1999, vol. 466, p. 403-407

On the role of the a1(1260) meson in τ → 4πντ decay

Bondar A. E., Eidelman S. I., Milstein A. I., Root N. I.

It is shown that a simple model successfully describing experimental data on the process e+e-→ 4π can also qualitatively account for the data of CLEOII and ALEPH obtained recently in the decay τ → 4πντ. The model is based on the assumption of the a1(1260)π and ωπ dominance as intermediate states. Our observation is in contrast with the claim by ARGUS that the ρ-meson signal in the τ → 4πντ decay can not be explained by the a1(1260)π intermediate state. © 1999 Published by Elsevier Science B.V. All rights reserved.