Search for the decay τ− → 3π−2π+2π0ντ
search for the decay of the τ lepton to five charged and two neutral pions is performed using data collected by the BABAR detector at the PEP-II asymmetric-energy e + e − collider. The analysis uses 232 fb − 1 of data at center-of-mass energies on or near the Υ ( 4 S ) resonance. We observe 10 e...
| Autores: | , |
|---|---|
| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2006 |
| País: | España |
| Recursos: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/131392 |
| Acesso em linha: | https://hdl.handle.net/2445/131392 |
| Access Level: | acceso abierto |
| Palavra-chave: | Física de partícules Experiments Particle physics |
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Search for the decay τ− → 3π−2π+2π0ντGraugés Pous, EugeniBABAR CollaborationFísica de partículesExperimentsParticle physicsExperimentssearch for the decay of the τ lepton to five charged and two neutral pions is performed using data collected by the BABAR detector at the PEP-II asymmetric-energy e + e − collider. The analysis uses 232 fb − 1 of data at center-of-mass energies on or near the Υ ( 4 S ) resonance. We observe 10 events with an expected background of 6.5 + 2.0 − 1.4 events. In the absence of a signal, we set the limit on the branching ratio B ( τ − → 3 π − 2 π + 2 π 0 ν τ ) < 3.4 × 10 − 6 at the 90% confidence level. This is a significant improvement over the previously established limit. In addition, we search for the decay mode τ − → 2 ω π − ν τ . We observe 1 event with an expected background of 0.4 + 1.0 − 0.4 events and calculate the upper limit B ( τ − → 2 ω π − ν τ ) < 5.4 × 10 − 7 at the 90% confidence level. This is the first upper limit for this mode.American Physical Society2006info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/131392Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1103/PhysRevD.73.112003Physical Review D, 2006, vol. 73, num. 11, p. 112003https://doi.org/10.1103/PhysRevD.73.112003(c) American Physical Society, 2006info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1313922026-05-27T06:46:51Z |
| dc.title.none.fl_str_mv |
Search for the decay τ− → 3π−2π+2π0ντ |
| title |
Search for the decay τ− → 3π−2π+2π0ντ |
| spellingShingle |
Search for the decay τ− → 3π−2π+2π0ντ Graugés Pous, Eugeni Física de partícules Experiments Particle physics Experiments |
| title_short |
Search for the decay τ− → 3π−2π+2π0ντ |
| title_full |
Search for the decay τ− → 3π−2π+2π0ντ |
| title_fullStr |
Search for the decay τ− → 3π−2π+2π0ντ |
| title_full_unstemmed |
Search for the decay τ− → 3π−2π+2π0ντ |
| title_sort |
Search for the decay τ− → 3π−2π+2π0ντ |
| dc.creator.none.fl_str_mv |
Graugés Pous, Eugeni BABAR Collaboration |
| author |
Graugés Pous, Eugeni |
| author_facet |
Graugés Pous, Eugeni BABAR Collaboration |
| author_role |
author |
| author2 |
BABAR Collaboration |
| author2_role |
author |
| dc.subject.none.fl_str_mv |
Física de partícules Experiments Particle physics Experiments |
| topic |
Física de partícules Experiments Particle physics Experiments |
| description |
search for the decay of the τ lepton to five charged and two neutral pions is performed using data collected by the BABAR detector at the PEP-II asymmetric-energy e + e − collider. The analysis uses 232 fb − 1 of data at center-of-mass energies on or near the Υ ( 4 S ) resonance. We observe 10 events with an expected background of 6.5 + 2.0 − 1.4 events. In the absence of a signal, we set the limit on the branching ratio B ( τ − → 3 π − 2 π + 2 π 0 ν τ ) < 3.4 × 10 − 6 at the 90% confidence level. This is a significant improvement over the previously established limit. In addition, we search for the decay mode τ − → 2 ω π − ν τ . We observe 1 event with an expected background of 0.4 + 1.0 − 0.4 events and calculate the upper limit B ( τ − → 2 ω π − ν τ ) < 5.4 × 10 − 7 at the 90% confidence level. This is the first upper limit for this mode. |
| publishDate |
2006 |
| dc.date.none.fl_str_mv |
2006 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/2445/131392 |
| url |
https://hdl.handle.net/2445/131392 |
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Inglés |
| language_invalid_str_mv |
Inglés |
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Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.73.112003 Physical Review D, 2006, vol. 73, num. 11, p. 112003 https://doi.org/10.1103/PhysRevD.73.112003 |
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(c) American Physical Society, 2006 info:eu-repo/semantics/openAccess |
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(c) American Physical Society, 2006 |
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openAccess |
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application/pdf |
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American Physical Society |
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American Physical Society |
| dc.source.none.fl_str_mv |
Articles publicats en revistes (Física Quàntica i Astrofísica) reponame:Dipòsit Digital de la UB instname:Universidad de Barcelona |
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Universidad de Barcelona |
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Dipòsit Digital de la UB |
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Dipòsit Digital de la UB |
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15,301603 |