Hadronic Structure in the Decay $τ^{-}\to π^{-}π^{0}ν_τ$

Details Hadronic Structure in the Decay $τ^{-}\to π^{-}π^{0}ν_τ$ Hadronic Structure in the Decay $τ^{-}\to π^{-}π^{0}ν_τ$

1999-10-21

arxiv.org/abs/hep-ex/9910046v1

Phys.Rev.D61:112002,2000

Physics

High Energy Physics

High Energy Physics - Experiment

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

Scientific paper

10.1103/PhysRevD.61.112002

We report on a study of the invariant mass spectrum of the hadronic system in the decay tau- -> pi- pi0 nu_tau. 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 rho(770) and rho(1450) mesons are determined. The pi- pi0 spectral function inferred from the invariant mass spectrum is compared with data on e+ e- -> pi+ pi- 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.

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