Hadronic structure in the decay τ-→π-π0ντ
Physical Review D - Particles, Fields, Gravitation and Cosmology 61:11 (2000) 1-19
Abstract:
We report on a study of the invariant mass spectrum of the hadronic system in the decay τ-→π-π0ντ. This study was performed with data obtained with the CLEO II detector operating at the CESR e+e- collider. We present fits to phenomenological models in which resonance parameters associated with the ρ(770) and ρ(1450) mesons are determined. The π-π0 spectral function inferred from the invariant mass spectrum is compared with data on e+e-π+π- as a test of the conserved vector current theorem. We also discuss the implications of our data with regard to estimates of the hadronic contribution to the muon anomalous magnetic moment. ©2000 The American Physical Society.Resonant structure of τ→ππ0ντ and τ→ωπντ decays
Physical Review D - Particles, Fields, Gravitation and Cosmology 61:7 (2000) 1-16
Abstract:
The resonant structure of the four pion final state in the decay τ→3ππ0ντ has been analyzed using 4.27 million τ+τ- pairs collected by the CLEO II experiment at the Cornell Electron Storage Ring. A partial wave analysis of the resonant structure of the ô-»3 τ→3ππ0ντ decay has been performed; the spectral decomposition of the four pion system is dominated by the ωπ and a1π final states. The mass and width of the ρ′ resonance have been extracted from a fit to the τ→ωπντ spectral function. We have searched for second class currents in the decay τ→ωπντ using spin-parity analysis and established an upper limit on the non-vector current contribution. ©2000 The American Physical Society.Update of the search for the neutrinoless decay τ→μγ
Physical Review D American Physical Society (APS) 61:7 (2000) 071101
Limit on the tau neutrino mass from τ-→π-π+π-π 0vτ
Physical Review D - Particles, Fields, Gravitation and Cosmology 61:5 (2000) 1-7
Abstract:
From a data sample of 29058 τ±→π±π+π -π0vτdecays observed in the CLEO detector we derive a 95% confidence upper limit on the tau neutrino mass of 28 MeV. ©2000 The American Physical Society.Structure functions in the decay τ∓→π∓π0π0ν τ
Physical Review D - Particles, Fields, Gravitation and Cosmology 61:5 (2000) 1-11