Hadronic structure in the decay tau- ---> pi- pi0 neutrino(tau)

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.

electron positron: colliding beams
electron positron: annihilation
tau: pair production
tau: semileptonic decay
mass spectrum: (pi- pi0)
rho(770)-
rho(1450)
CVC model model: validity test
CLEO
experimental results

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Figures(0)

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