A Measurement of the Branching Fraction ${\cal B} τ^+ \to h^- π^0 ν_τ$

Details A Measurement of the Branching Fraction ${\cal B} τ^+ \to h^- π^0 ν_τ$ A Measurement of the Branching Fraction ${\cal B} τ^+ \to h^- π^0 ν_τ$

1994-04-20

arxiv.org/abs/hep-ph/9404310v1

Phys.Rev.Lett.72:3762-3766,1994

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages (in REVTEX format) Preprint CLNS94-1281, CLEO 94-11

Scientific paper

10.1103/PhysRevLett.72.3762

Using data from the CLEO II detector at CESR, we measure ${\cal B}(\tau^\pm\rightarrow h^\pm\pi^0\nu_\tau)$ where $h^\pm$ refers to either $\pi^\pm$ or $K^\pm$. We use three different methods to measure this branching fraction. The combined result is ${\cal B}(\tau^\pm\rightarrow h^\pm\pi^0\nu_\tau) = 0.2587 \pm 0.0012 \pm 0.0042$, in good agreement with Standard Model predictions. This result, in combination with other precision measurements, reduces the significance of the one-prong problem in tau decays. A postscript version is available through World-Wide-Web in http://w4.lns.cornell.edu/public/CLNS/1994/

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