Precision Measurement of the Mass and Lifetime of the Ξ0b Baryon
Using a proton-proton collision data sample corresponding to an integrated luminosity of 3 fb−1 collected by LHCb at center-of-mass energies of 7 and 8 TeV, about 3800 Ξ0b→Ξ+cπ−, Ξ+c→pK−π+ signal decays are reconstructed. From this sample, the first measurement of the Ξ0b baryon lifetime is made, r...
| Autores: | , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2014 |
| País: | España |
| Institución: | Universitat Ramon Llull (URL) |
| Repositorio: | DAU Arxiu Digital de la Universitat Ramon Llull |
| OAI Identifier: | oai:dau.url.edu:20.500.14342/3283 |
| Acceso en línea: | http://hdl.handle.net/20.500.14342/3283 https://doi.org/10.1103/PhysRevLett.113.032001 |
| Access Level: | acceso abierto |
| Palabra clave: | Gran col·lisionador d'hadrons (França i Suïssa) Protons Partícules (Física nuclear) Col·lisions (Física nuclear) 53 |
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Precision Measurement of the Mass and Lifetime of the Ξ0b BaryonBadalov, AlexeyCalvo Gómez, MíriamCamboni, AlessandroVilasís Cardona, XavierLHCb Collaboration - CERNGran col·lisionador d'hadrons (França i Suïssa)ProtonsPartícules (Física nuclear)Col·lisions (Física nuclear)53Using a proton-proton collision data sample corresponding to an integrated luminosity of 3 fb−1 collected by LHCb at center-of-mass energies of 7 and 8 TeV, about 3800 Ξ0b→Ξ+cπ−, Ξ+c→pK−π+ signal decays are reconstructed. From this sample, the first measurement of the Ξ0b baryon lifetime is made, relative to that of the Λ0b baryon. The mass differences M(Ξ0b)−M(Λ0b) and M(Ξ+c)−M(Λ+c) are also measured with precision more than 4 times better than the current world averages. The resulting values are τΞ0bτΛ0b=1.006±0.018±0.010,M(Ξ0b)−M(Λ0b)=172.44±0.39±0.17 MeV/c2,M(Ξ+c)−M(Λ+c)=181.51±0.14±0.10 MeV/c2,where the first uncertainty is statistical and the second is systematic. The relative rate of Ξ0b to Λ0b baryon production is measured to be fΞ0bfΛ0bB(Ξ0b→Ξ+cπ−)B(Λ0b→Λ+cπ−)B(Ξ+c→pK−π+)B(Λ+c→pK−π+)=(1.88±0.04±0.03)×10−2,where the first factor is the ratio of fragmentation fractions, b→Ξ0b relative to b→Λ0b. Relative production rates as functions of transverse momentum and pseudorapidity are also presented.American Physical SocietyUniversitat Ramon Llull. La SalleCERN202020232020202320142014info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion10 p.application/pdfhttp://hdl.handle.net/20.500.14342/3283https://doi.org/10.1103/PhysRevLett.113.032001RECERCAT (Dipòsit de la Recerca de Catalunya)reponame:DAU Arxiu Digital de la Universitat Ramon Llullinstname:Universitat Ramon Llull (URL)InglésPhysical Review Letters, 2014, Vol. 113, No. 3 (Juliol)Attribution 4.0 International© CERNhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:dau.url.edu:20.500.14342/32832026-06-21T06:40:37Z |
| dc.title.none.fl_str_mv |
Precision Measurement of the Mass and Lifetime of the Ξ0b Baryon |
| title |
Precision Measurement of the Mass and Lifetime of the Ξ0b Baryon |
| spellingShingle |
Precision Measurement of the Mass and Lifetime of the Ξ0b Baryon Badalov, Alexey Gran col·lisionador d'hadrons (França i Suïssa) Protons Partícules (Física nuclear) Col·lisions (Física nuclear) 53 |
| title_short |
Precision Measurement of the Mass and Lifetime of the Ξ0b Baryon |
| title_full |
Precision Measurement of the Mass and Lifetime of the Ξ0b Baryon |
| title_fullStr |
Precision Measurement of the Mass and Lifetime of the Ξ0b Baryon |
| title_full_unstemmed |
Precision Measurement of the Mass and Lifetime of the Ξ0b Baryon |
| title_sort |
Precision Measurement of the Mass and Lifetime of the Ξ0b Baryon |
| 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) Protons Partícules (Física nuclear) Col·lisions (Física nuclear) 53 |
| topic |
Gran col·lisionador d'hadrons (França i Suïssa) Protons Partícules (Física nuclear) Col·lisions (Física nuclear) 53 |
| description |
Using a proton-proton collision data sample corresponding to an integrated luminosity of 3 fb−1 collected by LHCb at center-of-mass energies of 7 and 8 TeV, about 3800 Ξ0b→Ξ+cπ−, Ξ+c→pK−π+ signal decays are reconstructed. From this sample, the first measurement of the Ξ0b baryon lifetime is made, relative to that of the Λ0b baryon. The mass differences M(Ξ0b)−M(Λ0b) and M(Ξ+c)−M(Λ+c) are also measured with precision more than 4 times better than the current world averages. The resulting values are τΞ0bτΛ0b=1.006±0.018±0.010,M(Ξ0b)−M(Λ0b)=172.44±0.39±0.17 MeV/c2,M(Ξ+c)−M(Λ+c)=181.51±0.14±0.10 MeV/c2,where the first uncertainty is statistical and the second is systematic. The relative rate of Ξ0b to Λ0b baryon production is measured to be fΞ0bfΛ0bB(Ξ0b→Ξ+cπ−)B(Λ0b→Λ+cπ−)B(Ξ+c→pK−π+)B(Λ+c→pK−π+)=(1.88±0.04±0.03)×10−2,where the first factor is the ratio of fragmentation fractions, b→Ξ0b relative to b→Λ0b. Relative production rates as functions of transverse momentum and pseudorapidity are also presented. |
| publishDate |
2014 |
| dc.date.none.fl_str_mv |
2014 2014 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/20.500.14342/3283 https://doi.org/10.1103/PhysRevLett.113.032001 |
| url |
http://hdl.handle.net/20.500.14342/3283 https://doi.org/10.1103/PhysRevLett.113.032001 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
Physical Review Letters, 2014, Vol. 113, No. 3 (Juliol) |
| 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 |
10 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 |
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) |
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DAU Arxiu Digital de la Universitat Ramon Llull |
| collection |
DAU Arxiu Digital de la Universitat Ramon Llull |
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| repository.mail.fl_str_mv |
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1869408191303909376 |
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15,300719 |