CVC and τ\rightarrow η(η^\prime)π^{-}π^{0}ν_τ

Abstract

We use experimental data on $e^{+}{e}^{-}\to \eta {\pi }^{+}{\pi }^{-}$ and ${\tau }^{-}\to \eta {\pi }^{-}{\pi }^0{\nu }_{\tau }$ to test conservation of vector current (CVC) by comparing the predicted hadronic spectrum and branching fraction with the $\tau$ decay data. Based on the corresponding $e^{+}{e}^{-}$ data and CVC, we also calculate the branching fraction of ${\tau }^{-}\to {\eta }^{\prime }{\pi }^{-}{\pi }^0{\nu }_{\tau }$ decay.

6 pages, 5 figures, Talk at The 11th International Workshop on Tau Lepton Physics Manchester, UK, 13-17 September 2010

References in corpus (1)

• The Discrepancy Between tau and e+e- Spectral Functions Revisited and the Consequences for the Muon Magnetic Anomaly

Cited by in corpus (6)

• The Physics of the B Factories
• Resonance Chiral Lagrangian analysis of ${\tau }^{-}\to {\eta }^{(\prime )}{\pi }^{-}{\pi }^0{\nu }_{\tau }$ decays
• Measurement of the $e^{+}{e}^{-}\to \eta {\pi }^{+}{\pi }^{-}$ cross section in the center-of-mass energy range 1.22--2.00 GeV with the SND detector at the VEPP-2000 collider
• Search for the process $e^{+}{e}^{-}\to {\eta }^{\prime }(958)$ with the CMD-3 detector
• Measurement of the $e^{+}{e}^{-}\to \eta {\pi }^{+}{\pi }^{-}$ cross section with the CMD-3 detector at the VEPP-2000 collider
• Tension between $e^{+}{e}^{-}\to \eta {\pi }^{-}{\pi }^{+}$ and ${\tau }^{-}\to \eta {\pi }^{-}{\pi }^0{\nu }_{\tau }$ data and non-standard interactions