Search for B+→τ+ν decays with hadronic B tags

We present a search for the decay B + → τ + ν using 383 × 10 6 B ¯¯¯ B pairs collected at the Υ ( 4 S ) resonance with the BABAR detector at the SLAC PEP-II B Factory. We select a sample of events with one completely reconstructed tag B in a hadronic decay mode ( B − → D ( * ) 0 X − ), and examine t...

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Detalhes bibliográficos
Autores: Garra Ticó, Jordi, Graugés Pous, Eugeni, BABAR Collaboration
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2008
País:España
Recursos: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:2445/131547
Acesso em linha:https://hdl.handle.net/2445/131547
Access Level:acceso abierto
Palavra-chave:Física de partícules
Experiments
Particle physics
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spelling Search for B+→τ+ν decays with hadronic B tagsGarra Ticó, JordiGraugés Pous, EugeniBABAR CollaborationFísica de partículesExperimentsParticle physicsExperimentsWe present a search for the decay B + → τ + ν using 383 × 10 6 B ¯¯¯ B pairs collected at the Υ ( 4 S ) resonance with the BABAR detector at the SLAC PEP-II B Factory. We select a sample of events with one completely reconstructed tag B in a hadronic decay mode ( B − → D ( * ) 0 X − ), and examine the rest of the event to search for a B + → τ + ν decay. We identify the τ lepton in the following modes: τ + → e + ν ¯ ν , τ + → μ + ν ¯ ν , τ + → π + ¯ ν , and τ + → π + π 0 ¯ ν . We find a 2.2 σ excess in data and measure a branching fraction of B ( B + → τ + ν ) = ( 1.8 + 0.9 − 0.8 ( stat . ) ± 0.4 ( bkg .   syst . ) ± 0.2 ( other   syst . ) ) × 10 − 4 . We calculate the product of the B meson decay constant f B and | V u b | to be f B ⋅ | V u b | = ( 10.1 + 2.3 − 2.5 ( stat . ) + 1.2 − 1.5 ( syst . ) ) × 10 − 4     GeV .American Physical Society2019201920082019info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion9 p.application/pdfhttps://hdl.handle.net/2445/131547Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.1103/PhysRevD.77.011107Physical Review D, 2008, vol. 77, p. 011107https://doi.org/10.1103/PhysRevD.77.011107(c) American Physical Society, 2008info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1315472026-05-29T05:05:01Z
dc.title.none.fl_str_mv Search for B+→τ+ν decays with hadronic B tags
title Search for B+→τ+ν decays with hadronic B tags
spellingShingle Search for B+→τ+ν decays with hadronic B tags
Garra Ticó, Jordi
Física de partícules
Experiments
Particle physics
Experiments
title_short Search for B+→τ+ν decays with hadronic B tags
title_full Search for B+→τ+ν decays with hadronic B tags
title_fullStr Search for B+→τ+ν decays with hadronic B tags
title_full_unstemmed Search for B+→τ+ν decays with hadronic B tags
title_sort Search for B+→τ+ν decays with hadronic B tags
dc.creator.none.fl_str_mv Garra Ticó, Jordi
Graugés Pous, Eugeni
BABAR Collaboration
author Garra Ticó, Jordi
author_facet Garra Ticó, Jordi
Graugés Pous, Eugeni
BABAR Collaboration
author_role author
author2 Graugés Pous, Eugeni
BABAR Collaboration
author2_role author
author
dc.subject.none.fl_str_mv Física de partícules
Experiments
Particle physics
Experiments
topic Física de partícules
Experiments
Particle physics
Experiments
description We present a search for the decay B + → τ + ν using 383 × 10 6 B ¯¯¯ B pairs collected at the Υ ( 4 S ) resonance with the BABAR detector at the SLAC PEP-II B Factory. We select a sample of events with one completely reconstructed tag B in a hadronic decay mode ( B − → D ( * ) 0 X − ), and examine the rest of the event to search for a B + → τ + ν decay. We identify the τ lepton in the following modes: τ + → e + ν ¯ ν , τ + → μ + ν ¯ ν , τ + → π + ¯ ν , and τ + → π + π 0 ¯ ν . We find a 2.2 σ excess in data and measure a branching fraction of B ( B + → τ + ν ) = ( 1.8 + 0.9 − 0.8 ( stat . ) ± 0.4 ( bkg .   syst . ) ± 0.2 ( other   syst . ) ) × 10 − 4 . We calculate the product of the B meson decay constant f B and | V u b | to be f B ⋅ | V u b | = ( 10.1 + 2.3 − 2.5 ( stat . ) + 1.2 − 1.5 ( syst . ) ) × 10 − 4     GeV .
publishDate 2008
dc.date.none.fl_str_mv 2008
2019
2019
2019
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/2445/131547
url https://hdl.handle.net/2445/131547
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.77.011107
Physical Review D, 2008, vol. 77, p. 011107
https://doi.org/10.1103/PhysRevD.77.011107
dc.rights.none.fl_str_mv (c) American Physical Society, 2008
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) American Physical Society, 2008
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 9 p.
application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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