Exclusive Branching-Fraction Measurements of Semileptonic τ Decays into Three Charged Hadrons, into φπντ, and into φKντ

B. Aubert et al. (The BABAR Collaboration)
Phys. Rev. Lett. 100, 011801 – Published 8 January 2008

Abstract

Using a data sample corresponding to an integrated luminosity of 342fb1 collected with the BABAR detector at the SLAC PEP-II electron-positron storage ring operating at a center-of-mass energy near 10.58 GeV, we measure B(τπππ+ντ(ex.KS0))=(8.83±0.01±0.13)%, B(τKππ+ντ(ex.KS0))=(0.273±0.002±0.009)%, B(τKπK+ντ)=(0.1346±0.0010±0.0036)%, and B(τKKK+ντ)=(1.58±0.13±0.12)×105, where the uncertainties are statistical and systematic, respectively. These include significant improvements over previous measurements and a first measurement of B(τKKK+ντ) in which no resonance structure is assumed. We also report a first measurement of B(τϕπντ)=(3.42±0.55±0.25)×105, a new measurement of B(τϕKντ)=(3.39±0.20±0.28)×105 and a first upper limit on B(τKKK+ντ(ex.ϕ)).

  • Figure
  • Figure
  • Received 19 July 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.011801

©2008 American Physical Society

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Vol. 100, Iss. 1 — 11 January 2008

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