Search for B+ -> l(+)nu(l) recoiling against B- -> D(0)l(-)(nu)over-barX

We present a search for the decay B+ -> l(+)nu(l) (l = tau, mu, or e) in (458.9 +/- 5.1) x 10(6) B (B) over bar pairs recorded with the BABAR detector at the PEP-II B-factory. We search for these B decays in a sample of B+B- events where one B- meson is reconstructed as B- -> D(0)l(-)(nu) over...

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Detalles Bibliográficos
Autores: Babar Collaboration, Azzolini, Virginia, López-March, Neus, Martínez-Vidal, Fernando, Milanés, Diego A., Oyanguren, Arantza, Aubert, B., Lees, J. P.
Tipo de recurso: artículo
Fecha de publicación:2010
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/23452
Acceso en línea:http://hdl.handle.net/10261/23452
Access Level:acceso abierto
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spelling Search for B+ -> l(+)nu(l) recoiling against B- -> D(0)l(-)(nu)over-barXBabar CollaborationAzzolini, VirginiaLópez-March, NeusMartínez-Vidal, FernandoMilanés, Diego A.Oyanguren, ArantzaAubert, B.Lees, J. P.We present a search for the decay B+ -> l(+)nu(l) (l = tau, mu, or e) in (458.9 +/- 5.1) x 10(6) B (B) over bar pairs recorded with the BABAR detector at the PEP-II B-factory. We search for these B decays in a sample of B+B- events where one B- meson is reconstructed as B- -> D(0)l(-)(nu) over barX. Using the method of Feldman and Cousins, we obtain B(B+ -> tau(+)nu(tau)) = (1.7 +/- 0.8 +/- 0.2) x 10(-4), which excludes zero at 2.3 sigma. We interpret the central value in the context of the standard model and find the B meson decay constant to be f(B)(2) = (62 +/- 31) x 10(3) MeV2. We find no evidence for B+ -> e(+)nu(e) and B+ -> mu(+)nu(mu) and set upper limits at the 90% C. L. B(B+ -> e(+)nu(e)) < 0.8 x 10(-5) and B(B+ -> mu(+)nu(mu)) < 1.1 x 10(-5).This work is supported by DOE and NSF (USA), NSERC (Canada), CEA and CNRS-IN2P3 (France), BMBF and DFG (Germany), INFN (Italy), FOM(The Netherlands), NFR (Norway), MES (Russia), MEC (Spain), and STFC (United Kingdom). Individuals have received support from the Marie Curie EIF (European Union) and the A. P. Sloan Foundation.Peer reviewedAmerican Physical Society201020102010info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501217852 bytesapplication/pdfhttp://hdl.handle.net/10261/23452reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/ 10.1103/PhysRevD.81.051101info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/234522026-05-22T06:33:51Z
dc.title.none.fl_str_mv Search for B+ -> l(+)nu(l) recoiling against B- -> D(0)l(-)(nu)over-barX
title Search for B+ -> l(+)nu(l) recoiling against B- -> D(0)l(-)(nu)over-barX
spellingShingle Search for B+ -> l(+)nu(l) recoiling against B- -> D(0)l(-)(nu)over-barX
Babar Collaboration
title_short Search for B+ -> l(+)nu(l) recoiling against B- -> D(0)l(-)(nu)over-barX
title_full Search for B+ -> l(+)nu(l) recoiling against B- -> D(0)l(-)(nu)over-barX
title_fullStr Search for B+ -> l(+)nu(l) recoiling against B- -> D(0)l(-)(nu)over-barX
title_full_unstemmed Search for B+ -> l(+)nu(l) recoiling against B- -> D(0)l(-)(nu)over-barX
title_sort Search for B+ -> l(+)nu(l) recoiling against B- -> D(0)l(-)(nu)over-barX
dc.creator.none.fl_str_mv Babar Collaboration
Azzolini, Virginia
López-March, Neus
Martínez-Vidal, Fernando
Milanés, Diego A.
Oyanguren, Arantza
Aubert, B.
Lees, J. P.
author Babar Collaboration
author_facet Babar Collaboration
Azzolini, Virginia
López-March, Neus
Martínez-Vidal, Fernando
Milanés, Diego A.
Oyanguren, Arantza
Aubert, B.
Lees, J. P.
author_role author
author2 Azzolini, Virginia
López-March, Neus
Martínez-Vidal, Fernando
Milanés, Diego A.
Oyanguren, Arantza
Aubert, B.
Lees, J. P.
author2_role author
author
author
author
author
author
author
description We present a search for the decay B+ -> l(+)nu(l) (l = tau, mu, or e) in (458.9 +/- 5.1) x 10(6) B (B) over bar pairs recorded with the BABAR detector at the PEP-II B-factory. We search for these B decays in a sample of B+B- events where one B- meson is reconstructed as B- -> D(0)l(-)(nu) over barX. Using the method of Feldman and Cousins, we obtain B(B+ -> tau(+)nu(tau)) = (1.7 +/- 0.8 +/- 0.2) x 10(-4), which excludes zero at 2.3 sigma. We interpret the central value in the context of the standard model and find the B meson decay constant to be f(B)(2) = (62 +/- 31) x 10(3) MeV2. We find no evidence for B+ -> e(+)nu(e) and B+ -> mu(+)nu(mu) and set upper limits at the 90% C. L. B(B+ -> e(+)nu(e)) < 0.8 x 10(-5) and B(B+ -> mu(+)nu(mu)) < 1.1 x 10(-5).
publishDate 2010
dc.date.none.fl_str_mv 2010
2010
2010
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/23452
url http://hdl.handle.net/10261/23452
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/ 10.1103/PhysRevD.81.051101
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 217852 bytes
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 reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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