Measurement of CP asymmetry in D0 → K−K+ and D0 → π −π + decays

Time-integrated CP asymmetries in D0 decays to the final states K−K+ and π −π + are measured using proton-proton collisions corresponding to 3 fb−1 of integrated luminosity collected at centre-of-mass energies of 7 TeV and 8 TeV. The D0 mesons are produced in semileptonic b-hadron decays, where the...

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Detalhes bibliográficos
Autores: Badalov, Alexey, Calvo Gómez, Míriam, Camboni, Alessandro, Vilasís Cardona, Xavier, LHCb Collaboration - CERN
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2014
País:España
Recursos:Universitat Ramon Llull (URL)
Repositório:DAU Arxiu Digital de la Universitat Ramon Llull
OAI Identifier:oai:dau.url.edu:20.500.14342/3494
Acesso em linha:http://hdl.handle.net/20.500.14342/3494
https://doi.org/10.1007/JHEP07(2014)041
Access Level:Acceso aberto
Palavra-chave:Gran col·lisionador d'hadrons (França i Suïssa)
Interaccions d'hadrons
539
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spelling Measurement of CP asymmetry in D0 → K−K+ and D0 → π −π + decaysBadalov, AlexeyCalvo Gómez, MíriamCamboni, AlessandroVilasís Cardona, XavierLHCb Collaboration - CERNGran col·lisionador d'hadrons (França i Suïssa)Interaccions d'hadrons539Time-integrated CP asymmetries in D0 decays to the final states K−K+ and π −π + are measured using proton-proton collisions corresponding to 3 fb−1 of integrated luminosity collected at centre-of-mass energies of 7 TeV and 8 TeV. The D0 mesons are produced in semileptonic b-hadron decays, where the charge of the accompanying muon is used to determine the initial flavour of the charm meson. The difference in CP asymmetries between the two final states is measured to be ∆ACP = ACP (K−K+) − ACP (π −π +) = (+0.14 ± 0.16 (stat) ± 0.08 (syst))% . A measurement of ACP (K−K+) is obtained assuming negligible CP violation in charm mixing and in Cabibbo-favoured D decays. It is found to be ACP (K−K+) = (−0.06 ± 0.15 (stat) ± 0.10 (syst))% , where the correlation coefficient between ∆ACP and ACP (K−K+) is ρ = 0.28. By combining these results, the CP asymmetry in the D0 → π −π + channel is ACP (π −π +) = (−0.20 ± 0.19 (stat) ± 0.10 (syst))%.SpringerUniversitat Ramon Llull. La SalleCERN202120232021202320142014info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion25 p.application/pdfhttp://hdl.handle.net/20.500.14342/3494https://doi.org/10.1007/JHEP07(2014)041RECERCAT (Dipòsit de la Recerca de Catalunya)reponame:DAU Arxiu Digital de la Universitat Ramon Llullinstname:Universitat Ramon Llull (URL)InglésJournal of High Energy Physics, 2014, No. 41Attribution 4.0 International© CERNhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:dau.url.edu:20.500.14342/34942026-06-21T06:40:37Z
dc.title.none.fl_str_mv Measurement of CP asymmetry in D0 → K−K+ and D0 → π −π + decays
title Measurement of CP asymmetry in D0 → K−K+ and D0 → π −π + decays
spellingShingle Measurement of CP asymmetry in D0 → K−K+ and D0 → π −π + decays
Badalov, Alexey
Gran col·lisionador d'hadrons (França i Suïssa)
Interaccions d'hadrons
539
title_short Measurement of CP asymmetry in D0 → K−K+ and D0 → π −π + decays
title_full Measurement of CP asymmetry in D0 → K−K+ and D0 → π −π + decays
title_fullStr Measurement of CP asymmetry in D0 → K−K+ and D0 → π −π + decays
title_full_unstemmed Measurement of CP asymmetry in D0 → K−K+ and D0 → π −π + decays
title_sort Measurement of CP asymmetry in D0 → K−K+ and D0 → π −π + decays
dc.creator.none.fl_str_mv Badalov, Alexey
Calvo Gómez, Míriam
Camboni, Alessandro
Vilasís Cardona, Xavier
LHCb Collaboration - CERN
author Badalov, Alexey
author_facet Badalov, Alexey
Calvo Gómez, Míriam
Camboni, Alessandro
Vilasís Cardona, Xavier
LHCb Collaboration - CERN
author_role author
author2 Calvo Gómez, Míriam
Camboni, Alessandro
Vilasís Cardona, Xavier
LHCb Collaboration - CERN
author2_role author
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)
Interaccions d'hadrons
539
topic Gran col·lisionador d'hadrons (França i Suïssa)
Interaccions d'hadrons
539
description Time-integrated CP asymmetries in D0 decays to the final states K−K+ and π −π + are measured using proton-proton collisions corresponding to 3 fb−1 of integrated luminosity collected at centre-of-mass energies of 7 TeV and 8 TeV. The D0 mesons are produced in semileptonic b-hadron decays, where the charge of the accompanying muon is used to determine the initial flavour of the charm meson. The difference in CP asymmetries between the two final states is measured to be ∆ACP = ACP (K−K+) − ACP (π −π +) = (+0.14 ± 0.16 (stat) ± 0.08 (syst))% . A measurement of ACP (K−K+) is obtained assuming negligible CP violation in charm mixing and in Cabibbo-favoured D decays. It is found to be ACP (K−K+) = (−0.06 ± 0.15 (stat) ± 0.10 (syst))% , where the correlation coefficient between ∆ACP and ACP (K−K+) is ρ = 0.28. By combining these results, the CP asymmetry in the D0 → π −π + channel is ACP (π −π +) = (−0.20 ± 0.19 (stat) ± 0.10 (syst))%.
publishDate 2014
dc.date.none.fl_str_mv 2014
2014
2021
2021
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/20.500.14342/3494
https://doi.org/10.1007/JHEP07(2014)041
url http://hdl.handle.net/20.500.14342/3494
https://doi.org/10.1007/JHEP07(2014)041
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Journal of High Energy Physics, 2014, No. 41
dc.rights.none.fl_str_mv Attribution 4.0 International
© CERN
http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution 4.0 International
© CERN
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 25 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 15,300719

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