Observation of CP Violation in B0→K+π− and B0→π+π−

We report observations of C P violation in the decays B 0 → K + π − and B 0 → π + π − in a sample of 383 × 10 6 Υ ( 4 S ) → B ¯¯¯ B events. We find 4372 ± 82 B 0 → K + π − decays and measure the direct C P -violating charge asymmetry A K π = − 0.107 ± 0.018 ( stat ) + 0.007 − 0.004 ( syst ) , which...

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Detalles Bibliográficos
Autores: Garra Ticó, Jordi, Graugés Pous, Eugeni, BABAR Collaboration
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2007
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:2445/140076
Acceso en línea:https://hdl.handle.net/2445/140076
Access Level:acceso abierto
Palabra clave:Física de partícules
Experiments
Particle physics
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spelling Observation of CP Violation in B0→K+π− and B0→π+π−Garra Ticó, JordiGraugés Pous, EugeniBABAR CollaborationFísica de partículesExperimentsParticle physicsExperimentsWe report observations of C P violation in the decays B 0 → K + π − and B 0 → π + π − in a sample of 383 × 10 6 Υ ( 4 S ) → B ¯¯¯ B events. We find 4372 ± 82 B 0 → K + π − decays and measure the direct C P -violating charge asymmetry A K π = − 0.107 ± 0.018 ( stat ) + 0.007 − 0.004 ( syst ) , which excludes the C P -conserving hypothesis with a significance of 5.5 standard deviations. In the same sample, we find 1139 ± 49 B 0 → π + π − decays and measure the C P -violating asymmetries S π π = − 0.60 ± 0.11 ( stat ) ± 0.03 ( syst ) and C π π = − 0.21 ± 0.09 ( stat ) ± 0.02 ( syst ) . C P conservation in B 0 → π + π − ( S π π = C π π = 0 ) is excluded at a confidence level 1 − C . L . = 8 × 10 − 8 , corresponding to 5.4 standard deviations.American Physical Society2019201920072019info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion7 p.application/pdfhttps://hdl.handle.net/2445/140076Articles 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.99.021603Physical Review Letters, 2007, vol. 99, num. 2, p. 021603https://doi.org/10.1103/PhysRevLett.99.021603(c) American Physical Society, 2007info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1400762026-05-29T05:05:01Z
dc.title.none.fl_str_mv Observation of CP Violation in B0→K+π− and B0→π+π−
title Observation of CP Violation in B0→K+π− and B0→π+π−
spellingShingle Observation of CP Violation in B0→K+π− and B0→π+π−
Garra Ticó, Jordi
Física de partícules
Experiments
Particle physics
Experiments
title_short Observation of CP Violation in B0→K+π− and B0→π+π−
title_full Observation of CP Violation in B0→K+π− and B0→π+π−
title_fullStr Observation of CP Violation in B0→K+π− and B0→π+π−
title_full_unstemmed Observation of CP Violation in B0→K+π− and B0→π+π−
title_sort Observation of CP Violation in B0→K+π− and B0→π+π−
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 report observations of C P violation in the decays B 0 → K + π − and B 0 → π + π − in a sample of 383 × 10 6 Υ ( 4 S ) → B ¯¯¯ B events. We find 4372 ± 82 B 0 → K + π − decays and measure the direct C P -violating charge asymmetry A K π = − 0.107 ± 0.018 ( stat ) + 0.007 − 0.004 ( syst ) , which excludes the C P -conserving hypothesis with a significance of 5.5 standard deviations. In the same sample, we find 1139 ± 49 B 0 → π + π − decays and measure the C P -violating asymmetries S π π = − 0.60 ± 0.11 ( stat ) ± 0.03 ( syst ) and C π π = − 0.21 ± 0.09 ( stat ) ± 0.02 ( syst ) . C P conservation in B 0 → π + π − ( S π π = C π π = 0 ) is excluded at a confidence level 1 − C . L . = 8 × 10 − 8 , corresponding to 5.4 standard deviations.
publishDate 2007
dc.date.none.fl_str_mv 2007
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/2445/140076
url https://hdl.handle.net/2445/140076
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.99.021603
Physical Review Letters, 2007, vol. 99, num. 2, p. 021603
https://doi.org/10.1103/PhysRevLett.99.021603
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 7 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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