Studies of τ−→ηK−ντ and τ−→ηπ−ντ at BABAR and a search for a second-class current
We report on analyses of tau lepton decays τ − → η K − ν τ and τ − → η π − ν τ , with η → π + π − π 0 , using 470 fb − 1 of data from the BABAR experiment at PEP-II, collected at center-of-mass energies at and near the Υ ( 4 S ) resonance. We measure the branching fraction for the τ − → η K − ν...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2011 |
| País: | España |
| Institución: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2445/131741 |
| Acceso en línea: | https://hdl.handle.net/2445/131741 |
| Access Level: | acceso abierto |
| Palabra clave: | Física de partícules Experiments Particle physics |
| Sumario: | We report on analyses of tau lepton decays τ − → η K − ν τ and τ − → η π − ν τ , with η → π + π − π 0 , using 470 fb − 1 of data from the BABAR experiment at PEP-II, collected at center-of-mass energies at and near the Υ ( 4 S ) resonance. We measure the branching fraction for the τ − → η K − ν τ decay mode, B ( τ − → η K − ν τ ) = ( 1.42 ± 0.11 ( stat ) ± 0.07 ( syst ) ) × 10 − 4 , and report a 95% confidence level upper limit for the second-class current process τ − → η π − ν τ , B ( τ − → η π − ν τ ) < 9.9 × 10 − 5 . |
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