Isospin Amplitudes in Λ0b→J/ψΛ(Σ0) and Ξ0b→J/ψΞ0(Λ) Decays

Ratios of isospin amplitudes in hadron decays are a useful probe of the interplay between weak and strong interactions and allow searches for physics beyond the standard model. We present the first results on isospin amplitudes in b-baryon decays, using data corresponding to an integrated luminosity...

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Detalles Bibliográficos
Autores: Camboni, Alessandro, Calvo Gómez, Míriam, Vilasís Cardona, Xavier, LHCb Collaboration - CERN
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2020
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:20.500.14342/3075
Acceso en línea:http://hdl.handle.net/20.500.14342/3075
https://doi.org/10.1103/PhysRevLett.124.111802
Access Level:acceso abierto
Palabra clave:Gran col·lisionador d'hadrons (França i Suïssa)
Partícules (Física nuclear)
539
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spelling Isospin Amplitudes in Λ0b→J/ψΛ(Σ0) and Ξ0b→J/ψΞ0(Λ) DecaysCamboni, AlessandroCalvo Gómez, MíriamVilasís Cardona, XavierLHCb Collaboration - CERNGran col·lisionador d'hadrons (França i Suïssa)Partícules (Física nuclear)539Ratios of isospin amplitudes in hadron decays are a useful probe of the interplay between weak and strong interactions and allow searches for physics beyond the standard model. We present the first results on isospin amplitudes in b-baryon decays, using data corresponding to an integrated luminosity of 8.5  fb−1, collected with the LHCb detector in pp collisions at center of mass energies of 7, 8, and 13 TeV. The isospin amplitude ratio |A1(Λ0b→J/ψΣ0)/A0(Λ0b→J/ψΛ)|, where the subscript on A indicates the final-state isospin, is measured to be less than 1/21.8 at 95% confidence level. The Cabibbo suppressed Ξ0b→J/ψΛ decay is observed for the first time, allowing for the measurement |A0(Ξ0b→J/ψΛ)/A1/2(Ξ0b→J/ψΞ0)|=0.37±0.06±0.02, where the uncertainties are statistical and systematic, respectively.American Physical SocietyUniversitat Ramon Llull. La SalleCERN2020info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion11 p.http://hdl.handle.net/20.500.14342/3075https://doi.org/10.1103/PhysRevLett.124.111802reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésPhysical Review Letters, 2020, Vol.124, 111802Attribution 4.0 International© CERNhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:recercat.cat:20.500.14342/30752026-05-29T05:05:01Z
dc.title.none.fl_str_mv Isospin Amplitudes in Λ0b→J/ψΛ(Σ0) and Ξ0b→J/ψΞ0(Λ) Decays
title Isospin Amplitudes in Λ0b→J/ψΛ(Σ0) and Ξ0b→J/ψΞ0(Λ) Decays
spellingShingle Isospin Amplitudes in Λ0b→J/ψΛ(Σ0) and Ξ0b→J/ψΞ0(Λ) Decays
Camboni, Alessandro
Gran col·lisionador d'hadrons (França i Suïssa)
Partícules (Física nuclear)
539
title_short Isospin Amplitudes in Λ0b→J/ψΛ(Σ0) and Ξ0b→J/ψΞ0(Λ) Decays
title_full Isospin Amplitudes in Λ0b→J/ψΛ(Σ0) and Ξ0b→J/ψΞ0(Λ) Decays
title_fullStr Isospin Amplitudes in Λ0b→J/ψΛ(Σ0) and Ξ0b→J/ψΞ0(Λ) Decays
title_full_unstemmed Isospin Amplitudes in Λ0b→J/ψΛ(Σ0) and Ξ0b→J/ψΞ0(Λ) Decays
title_sort Isospin Amplitudes in Λ0b→J/ψΛ(Σ0) and Ξ0b→J/ψΞ0(Λ) Decays
dc.creator.none.fl_str_mv Camboni, Alessandro
Calvo Gómez, Míriam
Vilasís Cardona, Xavier
LHCb Collaboration - CERN
author Camboni, Alessandro
author_facet Camboni, Alessandro
Calvo Gómez, Míriam
Vilasís Cardona, Xavier
LHCb Collaboration - CERN
author_role author
author2 Calvo Gómez, Míriam
Vilasís 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 Ratios of isospin amplitudes in hadron decays are a useful probe of the interplay between weak and strong interactions and allow searches for physics beyond the standard model. We present the first results on isospin amplitudes in b-baryon decays, using data corresponding to an integrated luminosity of 8.5  fb−1, collected with the LHCb detector in pp collisions at center of mass energies of 7, 8, and 13 TeV. The isospin amplitude ratio |A1(Λ0b→J/ψΣ0)/A0(Λ0b→J/ψΛ)|, where the subscript on A indicates the final-state isospin, is measured to be less than 1/21.8 at 95% confidence level. The Cabibbo suppressed Ξ0b→J/ψΛ decay is observed for the first time, allowing for the measurement |A0(Ξ0b→J/ψΛ)/A1/2(Ξ0b→J/ψΞ0)|=0.37±0.06±0.02, where the uncertainties are statistical and systematic, respectively.
publishDate 2020
dc.date.none.fl_str_mv 2020
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/20.500.14342/3075
https://doi.org/10.1103/PhysRevLett.124.111802
url http://hdl.handle.net/20.500.14342/3075
https://doi.org/10.1103/PhysRevLett.124.111802
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Physical Review Letters, 2020, Vol.124, 111802
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 11 p.
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv 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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