Improved Measurement of the Cabibbo-Kobayashi-Maskawa Angle α Using B0(¯¯¯B)→ρ+ρ− Decays

We present results from an analysis of B 0 ( ¯¯¯ B 0 ) → ρ + ρ − using 232 × 10 6 Υ ( 4 S ) → B ¯¯¯ B decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. We measure the longitudinal polarization fraction f L = 0.978 ± 0.014 ( stat ) + 0.021 − 0.029 ( syst ) an...

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Detalles Bibliográficos
Autores: Graugés Pous, Eugeni, BABAR Collaboration
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2005
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:2445/140654
Acceso en línea:https://hdl.handle.net/2445/140654
Access Level:acceso abierto
Palabra clave:Física de partícules
Experiments
Particle physics
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spelling Improved Measurement of the Cabibbo-Kobayashi-Maskawa Angle α Using B0(¯¯¯B)→ρ+ρ− DecaysGraugés Pous, EugeniBABAR CollaborationFísica de partículesExperimentsParticle physicsExperimentsWe present results from an analysis of B 0 ( ¯¯¯ B 0 ) → ρ + ρ − using 232 × 10 6 Υ ( 4 S ) → B ¯¯¯ B decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. We measure the longitudinal polarization fraction f L = 0.978 ± 0.014 ( stat ) + 0.021 − 0.029 ( syst ) and the C P -violating parameters S L = − 0.33 ± 0.24 ( stat ) + 0.08 − 0.14 ( syst ) and C L = − 0.03 ± 0.18 ( stat ) ± 0.09 ( syst ) . Using an isospin analysis of B → ρ ρ decays, we determine the unitarity triangle parameter α . The solution compatible with the standard model is α = ( 100 ± 13 ) ° .American Physical Society2019201920052019info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion7 p.application/pdfapplication/pdfhttps://hdl.handle.net/2445/140654Articles 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/PhysRevLett.95.041805Physical Review Letters, 2005, vol. 95, num. 4, p. 041805https://doi.org/10.1103/PhysRevLett.95.041805(c) American Physical Society, 2005info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1406542026-05-29T05:05:01Z
dc.title.none.fl_str_mv Improved Measurement of the Cabibbo-Kobayashi-Maskawa Angle α Using B0(¯¯¯B)→ρ+ρ− Decays
title Improved Measurement of the Cabibbo-Kobayashi-Maskawa Angle α Using B0(¯¯¯B)→ρ+ρ− Decays
spellingShingle Improved Measurement of the Cabibbo-Kobayashi-Maskawa Angle α Using B0(¯¯¯B)→ρ+ρ− Decays
Graugés Pous, Eugeni
Física de partícules
Experiments
Particle physics
Experiments
title_short Improved Measurement of the Cabibbo-Kobayashi-Maskawa Angle α Using B0(¯¯¯B)→ρ+ρ− Decays
title_full Improved Measurement of the Cabibbo-Kobayashi-Maskawa Angle α Using B0(¯¯¯B)→ρ+ρ− Decays
title_fullStr Improved Measurement of the Cabibbo-Kobayashi-Maskawa Angle α Using B0(¯¯¯B)→ρ+ρ− Decays
title_full_unstemmed Improved Measurement of the Cabibbo-Kobayashi-Maskawa Angle α Using B0(¯¯¯B)→ρ+ρ− Decays
title_sort Improved Measurement of the Cabibbo-Kobayashi-Maskawa Angle α Using B0(¯¯¯B)→ρ+ρ− Decays
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 We present results from an analysis of B 0 ( ¯¯¯ B 0 ) → ρ + ρ − using 232 × 10 6 Υ ( 4 S ) → B ¯¯¯ B decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. We measure the longitudinal polarization fraction f L = 0.978 ± 0.014 ( stat ) + 0.021 − 0.029 ( syst ) and the C P -violating parameters S L = − 0.33 ± 0.24 ( stat ) + 0.08 − 0.14 ( syst ) and C L = − 0.03 ± 0.18 ( stat ) ± 0.09 ( syst ) . Using an isospin analysis of B → ρ ρ decays, we determine the unitarity triangle parameter α . The solution compatible with the standard model is α = ( 100 ± 13 ) ° .
publishDate 2005
dc.date.none.fl_str_mv 2005
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/2445/140654
url https://hdl.handle.net/2445/140654
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/PhysRevLett.95.041805
Physical Review Letters, 2005, vol. 95, num. 4, p. 041805
https://doi.org/10.1103/PhysRevLett.95.041805
dc.rights.none.fl_str_mv (c) American Physical Society, 2005
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) American Physical Society, 2005
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 7 p.
application/pdf
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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