First observation of τ → 3πηντ and τ → f1 πντ decays

CLEO Collaboration

Research output: Contribution to journalArticle

33 Citations (Scopus)

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’s using the η → γγ channel. The measured branching fractions are B(τ → πππ+ηντ = (3.4+0.6-0.5 ± 0.6) × 10-4 and B(τ → π0ηντ = (1.4 ± 0.6 ± 0.3) × 10-4. We observe clear evidence for f1 → ηππ substructure and measure B(τ → f1πντ) = (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 → πη′ντ) < 7.4 × 10-5 and B(τ → ππ0η′ντ) < 8.0 × 10-5.

Original languageEnglish
Pages (from-to)2406-2410
Number of pages5
JournalPhysical Review Letters
Volume79
Issue number13
DOIs
Publication statusPublished - 1997 Sep 29

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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CLEO Collaboration. / First observation of τ → 3πηντ and τ → f1 πντ decays. In: Physical Review Letters. 1997 ; Vol. 79, No. 13. pp. 2406-2410.
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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’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’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 Youngjoon Kwon",
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First observation of τ → 3πηντ and τ → f1 πντ decays. / CLEO Collaboration.

In: Physical Review Letters, Vol. 79, No. 13, 29.09.1997, p. 2406-2410.

Research output: Contribution to journalArticle

TY - JOUR

T1 - First observation of τ → 3πηντ and τ → f1 πντ decays

AU - CLEO Collaboration

AU - Bergfeld, T.

AU - Eisenstein, B. I.

AU - Ernst, J.

AU - Gladding, G. E.

AU - Gollin, G. D.

AU - Hans, R. M.

AU - Johnson, E.

AU - Karliner, I.

AU - Marsh, M. A.

AU - Palmer, M.

AU - Selen, M.

AU - Thaler, J. J.

AU - Edwards, K. W.

AU - Bellerive, A.

AU - Janicek, R.

AU - MacFarlane, D. B.

AU - Patel, P. M.

AU - Sadoff, A. J.

AU - Ammar, R.

AU - Baringer, P.

AU - Bean, A.

AU - Besson, D.

AU - Coppage, D.

AU - Darling, C.

AU - Davis, R.

AU - Hancock, N.

AU - Kotov, S.

AU - Kravchenko, I.

AU - Kwak, N.

AU - Anderson, S.

AU - Kubota, Y.

AU - Lee, S. J.

AU - O’neill, J. J.

AU - Patton, S.

AU - Poling, R.

AU - Riehle, T.

AU - Savinov, V.

AU - Smith, A.

AU - Alam, M. S.

AU - Athar, S. B.

AU - Ling, Z.

AU - Mahmood, A. H.

AU - Severini, H.

AU - Timm, S.

AU - Wappler, F.

AU - Anastassov, A.

AU - Blinov, S.

AU - Duboscq, J. E.

AU - Fujino, D.

AU - Kwon, Youngjoon

PY - 1997/9/29

Y1 - 1997/9/29

N2 - 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’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.

AB - 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’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.

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U2 - 10.1103/PhysRevLett.79.2406

DO - 10.1103/PhysRevLett.79.2406

M3 - Article

VL - 79

SP - 2406

EP - 2410

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 13

ER -