Study of high-multiplicity three-prong and five-prong τ decays at BABAR
We present measurements of the branching fractions of three-prong and five-prong τ decay modes using a sample of 430 million τ lepton pairs, corresponding to an integrated luminosity of 468 fb − 1 , collected with the BABAR detector at the PEP-II asymmetric-energy e + e − storage rings at SLAC N...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2012 |
| País: | España |
| Institución: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/131704 |
| Acceso en línea: | https://hdl.handle.net/2445/131704 |
| Access Level: | acceso abierto |
| Palabra clave: | Leptons (Física nuclear) Experiments Física de partícules Leptons (Nuclear physics) Particle physics |
| Sumario: | We present measurements of the branching fractions of three-prong and five-prong τ decay modes using a sample of 430 million τ lepton pairs, corresponding to an integrated luminosity of 468 fb − 1 , collected with the BABAR detector at the PEP-II asymmetric-energy e + e − storage rings at SLAC National Accelerator Laboratory. The τ − → ( 3 π ) − η ν τ , τ − → ( 3 π ) − ω ν τ , and τ − → π − f 1 ( 1285 ) ν τ branching fractions are presented, as well as a new limit on the branching fraction of the second-class current decay τ − → π − η ′ ( 958 ) ν τ . We search for the decay mode τ − → K − η ′ ( 958 ) ν τ and for five-prong decay modes with kaons, and place the first upper limits on their branching fractions. |
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