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The Discrepancy Between Tau and $e^+ e^-$ Spectral Functions Revisited and the Consequences for the Muon Magnetic
We revisit the procedure for comparing the pi pi spectral function measured in tau decays to that obtained in e+e- annihilation. We re-examine the isospin-breaking corrections using new experimental and theoretical input, and find improved agreement between the tau- --> pi- pi0 nu_tau branching f...
| Autores principales: | , , , , , , , , |
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| Lenguaje: | eng |
| Publicado: |
2009
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1140/epjc/s10052-009-1219-4 http://cds.cern.ch/record/1187123 |