@article{bcc84bcde8234caeb6b2bfb780fbae64,
title = "First observation of τ → 3πηντ and τ → f1 πντ decays",
abstract = "We have observed new channels for τ decays with an η in the final state. We study 3-prong tau decays, using the η → γγ and η → 3π0 decay modes and 1-prong decays with two π0{\textquoteright}s using the η → γγ channel. The measured branching fractions are B(τ → π−π−π+ηντ = (3.4+0.6-0.5 ± 0.6) × 10-4 and B(τ− → π−2π0ηντ = (1.4 ± 0.6 ± 0.3) × 10-4. We observe clear evidence for f1 → ηππ substructure and measure B(τ− → f1π−ντ) = (5.8+1.4-1.3 ± 1.8) × 10-4. We have also searched for η′(958) production and obtain 90% C.L. upper limits B(τ → π−η′ντ) < 7.4 × 10-5 and B(τ → π−π0η′ντ) < 8.0 × 10-5.",
author = "{CLEO Collaboration} and T. Bergfeld and Eisenstein, {B. I.} and J. Ernst and Gladding, {G. E.} and Gollin, {G. D.} and Hans, {R. M.} and E. Johnson and I. Karliner and Marsh, {M. A.} and M. Palmer and M. Selen and Thaler, {J. J.} and Edwards, {K. W.} and A. Bellerive and R. Janicek and MacFarlane, {D. B.} and Patel, {P. M.} and Sadoff, {A. J.} and R. Ammar and P. Baringer and A. Bean and D. Besson and D. Coppage and C. Darling and R. Davis and N. Hancock and S. Kotov and I. Kravchenko and N. Kwak and S. Anderson and Y. Kubota and Lee, {S. J.} and O{\textquoteright}neill, {J. J.} and S. Patton and R. Poling and T. Riehle and V. Savinov and A. Smith and Alam, {M. S.} and Athar, {S. B.} and Z. Ling and Mahmood, {A. H.} and H. Severini and S. Timm and F. Wappler and A. Anastassov and S. Blinov and Duboscq, {J. E.} and D. Fujino and Bliss, {D. W.}",
year = "1997",
month = sep,
day = "29",
doi = "10.1103/PhysRevLett.79.2406",
language = "English (US)",
volume = "79",
pages = "2406--2410",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "13",
}