Resonant Structure of $τ\to 3ππ^{0}ν_τ$ and $τ\to ωπν_τ$ Decays

Details Resonant Structure of $τ\to 3ππ^{0}ν_τ$ and $τ\to ωπν_τ$ Decays Resonant Structure of $τ\to 3ππ^{0}ν_τ$ and $τ\to ωπν_τ$ Decays

1999-08-06

arxiv.org/abs/hep-ex/9908024v1

Phys.Rev.D61:072003,2000

Physics

High Energy Physics

High Energy Physics - Experiment

34 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS

Scientific paper

10.1103/PhysRevD.61.072003

The resonant structure of the four pion final state in the decay $\tau \to 3\pi\pi^0\nu_\tau$ is analyzed using 4.27 million $\tau^+\tau^-$ pairs collected by the CLEO II experiment. We search for second class currents in the decay $\tau \to \omega\pi\nu_\tau$ using spin-parity analysis and establish an upper limit on the non-vector current contribution. The mass and width of the $\rho'$ resonance are extracted from a fit to the $\tau \to \omega\pi\nu_\tau$ spectral function. A partial wave analysis of the resonant structure of the $\tau \to 3\pi\pi^0\nu_\tau$ decay is performed; the spectral decomposition of the four pion system is dominated by the $\omega\pi$ and $a_1 \pi$ final states.

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