First evidence for the two-body charmless baryonic decay B0→pp¯¯¯

The results of a search for the rare two-body charmless baryonic decays B0→pp¯¯¯ and B0s→pp¯¯¯ are reported. The analysis uses a data sample, corresponding to an integrated luminosity of 0.9 fb−1, of pp collision data collected by the LHCb experiment at a centre-of-mass energy of 7 TeV. An excess of...

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Detalles Bibliográficos
Autores: Calvo Gomez, Miriam, Camboni, Alessandro, Vilasis-Cardona, Xavier, LHCb Collaboration - CERN
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2013
País:España
Institución:Universitat Ramon Llull (URL)
Repositorio:DAU Arxiu Digital de la Universitat Ramon Llull
OAI Identifier:oai:dau.url.edu:20.500.14342/3083
Acceso en línea:http://hdl.handle.net/20.500.14342/3083
https://doi.org/10.1007/JHEP10(2013)005
Access Level:acceso abierto
Palabra clave:Gran col·lisionador d'hadrons (França i Suïssa)
Partícules (Física nuclear)
539
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spelling First evidence for the two-body charmless baryonic decay B0→pp¯¯¯Calvo Gomez, MiriamCamboni, AlessandroVilasis-Cardona, XavierLHCb Collaboration - CERNGran col·lisionador d'hadrons (França i Suïssa)Partícules (Física nuclear)539The results of a search for the rare two-body charmless baryonic decays B0→pp¯¯¯ and B0s→pp¯¯¯ are reported. The analysis uses a data sample, corresponding to an integrated luminosity of 0.9 fb−1, of pp collision data collected by the LHCb experiment at a centre-of-mass energy of 7 TeV. An excess of B0→pp¯¯¯ candidates with respect to background expectations is seen with a statistical significance of 3.3 standard deviations. This is the first evidence for a two-body charmless baryonic B 0 decay. No significant B0s→pp¯¯¯ signal is observed, leading to an improvement of three orders of magnitude over previous bounds. If the excess events are interpreted as signal, the 68.3% confidence level intervals on the branching fractions are $ B(B0→pp¯¯¯)=1.47+0.62+0.35−0.51−0.14×10−8,B(Bs→pp¯¯¯)=2.84+2.03+0.85−1.68−0.18×10−8, $ where the first uncertainty is statistical and the second is systematic.SpringerUniversitat Ramon Llull. La SalleCERN202020232020202320132013info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion17 p.application/pdfhttp://hdl.handle.net/20.500.14342/3083https://doi.org/10.1007/JHEP10(2013)005RECERCAT (Dipòsit de la Recerca de Catalunya)reponame:DAU Arxiu Digital de la Universitat Ramon Llullinstname:Universitat Ramon Llull (URL)InglésJournal of High Energy Physics, 2013, Vol. 2013, No.10 (Octubre)© CERNAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:dau.url.edu:20.500.14342/30832026-06-21T06:40:37Z
dc.title.none.fl_str_mv First evidence for the two-body charmless baryonic decay B0→pp¯¯¯
title First evidence for the two-body charmless baryonic decay B0→pp¯¯¯
spellingShingle First evidence for the two-body charmless baryonic decay B0→pp¯¯¯
Calvo Gomez, Miriam
Gran col·lisionador d'hadrons (França i Suïssa)
Partícules (Física nuclear)
539
title_short First evidence for the two-body charmless baryonic decay B0→pp¯¯¯
title_full First evidence for the two-body charmless baryonic decay B0→pp¯¯¯
title_fullStr First evidence for the two-body charmless baryonic decay B0→pp¯¯¯
title_full_unstemmed First evidence for the two-body charmless baryonic decay B0→pp¯¯¯
title_sort First evidence for the two-body charmless baryonic decay B0→pp¯¯¯
dc.creator.none.fl_str_mv Calvo Gomez, Miriam
Camboni, Alessandro
Vilasis-Cardona, Xavier
LHCb Collaboration - CERN
author Calvo Gomez, Miriam
author_facet Calvo Gomez, Miriam
Camboni, Alessandro
Vilasis-Cardona, Xavier
LHCb Collaboration - CERN
author_role author
author2 Camboni, Alessandro
Vilasis-Cardona, Xavier
LHCb Collaboration - CERN
author2_role author
author
author
dc.contributor.none.fl_str_mv Universitat Ramon Llull. La Salle
CERN
dc.subject.none.fl_str_mv Gran col·lisionador d'hadrons (França i Suïssa)
Partícules (Física nuclear)
539
topic Gran col·lisionador d'hadrons (França i Suïssa)
Partícules (Física nuclear)
539
description The results of a search for the rare two-body charmless baryonic decays B0→pp¯¯¯ and B0s→pp¯¯¯ are reported. The analysis uses a data sample, corresponding to an integrated luminosity of 0.9 fb−1, of pp collision data collected by the LHCb experiment at a centre-of-mass energy of 7 TeV. An excess of B0→pp¯¯¯ candidates with respect to background expectations is seen with a statistical significance of 3.3 standard deviations. This is the first evidence for a two-body charmless baryonic B 0 decay. No significant B0s→pp¯¯¯ signal is observed, leading to an improvement of three orders of magnitude over previous bounds. If the excess events are interpreted as signal, the 68.3% confidence level intervals on the branching fractions are $ B(B0→pp¯¯¯)=1.47+0.62+0.35−0.51−0.14×10−8,B(Bs→pp¯¯¯)=2.84+2.03+0.85−1.68−0.18×10−8, $ where the first uncertainty is statistical and the second is systematic.
publishDate 2013
dc.date.none.fl_str_mv 2013
2013
2020
2020
2023
2023
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 http://hdl.handle.net/20.500.14342/3083
https://doi.org/10.1007/JHEP10(2013)005
url http://hdl.handle.net/20.500.14342/3083
https://doi.org/10.1007/JHEP10(2013)005
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Journal of High Energy Physics, 2013, Vol. 2013, No.10 (Octubre)
dc.rights.none.fl_str_mv © CERN
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv © CERN
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 17 p.
application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv RECERCAT (Dipòsit de la Recerca de Catalunya)
reponame:DAU Arxiu Digital de la Universitat Ramon Llull
instname:Universitat Ramon Llull (URL)
instname_str Universitat Ramon Llull (URL)
reponame_str DAU Arxiu Digital de la Universitat Ramon Llull
collection DAU Arxiu Digital de la Universitat Ramon Llull
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.301603

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