Evidence for B0→ρ0ρ0 Decays and Implications for the Cabibbo-Kobayashi-Maskawa Angle α

We search for the decays B 0 → ρ 0 ρ 0 , B 0 → ρ 0 f 0 ( 980 ) , and B 0 → f 0 ( 980 ) f 0 ( 980 ) in a sample of about 384 × 10 6 Υ ( 4 S ) → B ¯¯¯ B decays collected with the BABAR detector at the PEP-II asymmetric-energy e + e − collider at Stanford Linear Accelerator Center. We find evidence for...

Descripción completa

Detalles Bibliográficos
Autores: Graugés Pous, Eugeni, BABAR Collaboration
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2007
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/140239
Acceso en línea:https://hdl.handle.net/2445/140239
Access Level:acceso abierto
Palabra clave:Física de partícules
Experiments
Particle physics
id ES_c5a15bf89a4bf3838f6f72ceabfc44e2
oai_identifier_str oai:diposit.ub.edu:2445/140239
network_acronym_str ES
network_name_str España
repository_id_str
spelling Evidence for B0→ρ0ρ0 Decays and Implications for the Cabibbo-Kobayashi-Maskawa Angle αGraugés Pous, EugeniBABAR CollaborationFísica de partículesExperimentsParticle physicsExperimentsWe search for the decays B 0 → ρ 0 ρ 0 , B 0 → ρ 0 f 0 ( 980 ) , and B 0 → f 0 ( 980 ) f 0 ( 980 ) in a sample of about 384 × 10 6 Υ ( 4 S ) → B ¯¯¯ B decays collected with the BABAR detector at the PEP-II asymmetric-energy e + e − collider at Stanford Linear Accelerator Center. We find evidence for B 0 → ρ 0 ρ 0 with 3.5 σ significance and measure the branching fraction B = ( 1.07 ± 0.33 ± 0.19 ) × 10 − 6 and longitudinal polarization fraction f L = 0.87 ± 0.13 ± 0.04 , where the first uncertainty is statistical, and the second is systematic. The uncertainty on the Cabibbo-Kobayashi-Maskawa quark-mixing matrix unitarity angle α due to penguin contributions in B → ρ ρ decays is 18° at the 1 σ level. We also set upper limits on the B 0 → ρ 0 f 0 ( 980 ) and B 0 → f 0 ( 980 ) f 0 ( 980 ) decay rates.American Physical Society2007info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/140239Articles 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/PhysRevLett.98.111801Physical Review Letters, 2007, vol. 98, num. 11, p. 111801https://doi.org/10.1103/PhysRevLett.98.111801(c) American Physical Society, 2007info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1402392026-05-27T06:46:51Z
dc.title.none.fl_str_mv Evidence for B0→ρ0ρ0 Decays and Implications for the Cabibbo-Kobayashi-Maskawa Angle α
title Evidence for B0→ρ0ρ0 Decays and Implications for the Cabibbo-Kobayashi-Maskawa Angle α
spellingShingle Evidence for B0→ρ0ρ0 Decays and Implications for the Cabibbo-Kobayashi-Maskawa Angle α
Graugés Pous, Eugeni
Física de partícules
Experiments
Particle physics
Experiments
title_short Evidence for B0→ρ0ρ0 Decays and Implications for the Cabibbo-Kobayashi-Maskawa Angle α
title_full Evidence for B0→ρ0ρ0 Decays and Implications for the Cabibbo-Kobayashi-Maskawa Angle α
title_fullStr Evidence for B0→ρ0ρ0 Decays and Implications for the Cabibbo-Kobayashi-Maskawa Angle α
title_full_unstemmed Evidence for B0→ρ0ρ0 Decays and Implications for the Cabibbo-Kobayashi-Maskawa Angle α
title_sort Evidence for B0→ρ0ρ0 Decays and Implications for the Cabibbo-Kobayashi-Maskawa Angle α
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 search for the decays B 0 → ρ 0 ρ 0 , B 0 → ρ 0 f 0 ( 980 ) , and B 0 → f 0 ( 980 ) f 0 ( 980 ) in a sample of about 384 × 10 6 Υ ( 4 S ) → B ¯¯¯ B decays collected with the BABAR detector at the PEP-II asymmetric-energy e + e − collider at Stanford Linear Accelerator Center. We find evidence for B 0 → ρ 0 ρ 0 with 3.5 σ significance and measure the branching fraction B = ( 1.07 ± 0.33 ± 0.19 ) × 10 − 6 and longitudinal polarization fraction f L = 0.87 ± 0.13 ± 0.04 , where the first uncertainty is statistical, and the second is systematic. The uncertainty on the Cabibbo-Kobayashi-Maskawa quark-mixing matrix unitarity angle α due to penguin contributions in B → ρ ρ decays is 18° at the 1 σ level. We also set upper limits on the B 0 → ρ 0 f 0 ( 980 ) and B 0 → f 0 ( 980 ) f 0 ( 980 ) decay rates.
publishDate 2007
dc.date.none.fl_str_mv 2007
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/2445/140239
url https://hdl.handle.net/2445/140239
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.98.111801
Physical Review Letters, 2007, vol. 98, num. 11, p. 111801
https://doi.org/10.1103/PhysRevLett.98.111801
dc.rights.none.fl_str_mv (c) American Physical Society, 2007
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) American Physical Society, 2007
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 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:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869419005123493888
score 15,301603

Similares en LA Referencia