Mass and lifetime measurements of bottom and charm baryons in pp ̄ collisions at √s=1.96 TeV

We report on mass and lifetime measurements of several ground state charmed and bottom baryons, using a data sample corresponding to 9.6fb-1 from pp̄ collisions at s=1.96TeV and recorded with the Collider Detector at Fermilab. Baryon candidates are reconstructed from data collected with an online ev...

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Autores: Aaltonen, T., Casal, Bruno, Cuevas, Javier, Gómez, Gervasio, Palencia, Enrique, Ruiz Jimeno, Alberto, Scodellaro, Luca, Vilar Cortabitarte, R., Vizán, J., CDF Collaboration
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2014
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/110405
Acceso en línea:http://hdl.handle.net/10261/110405
Access Level:acceso abierto
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spelling Mass and lifetime measurements of bottom and charm baryons in pp ̄ collisions at √s=1.96 TeVAaltonen, T.Casal, BrunoCuevas, JavierGómez, GervasioPalencia, EnriqueRuiz Jimeno, AlbertoScodellaro, LucaVilar Cortabitarte, R.Vizán, J.CDF CollaborationWe report on mass and lifetime measurements of several ground state charmed and bottom baryons, using a data sample corresponding to 9.6fb-1 from pp̄ collisions at s=1.96TeV and recorded with the Collider Detector at Fermilab. Baryon candidates are reconstructed from data collected with an online event selection designed for the collection of long-lifetime heavy-flavor decay products and a second event selection designed to collect J/ ψ→μ+μ- candidates. First evidence for the process Ωb-→Ωc0π- is presented with a significance of 3.3σ. We measure the following baryon masses: M(Ξc0)=2470.85±0.24(stat) ±0.55(syst)MeV/c2,M(Ξc+)=2468.00±0.18(stat)±0.51(syst) MeV/c2,M(Λb)=5620.15±0.31(stat)±0.47(syst)MeV/c2,M(Ξb-)= 5793.4±1.8(stat)±0.7(syst)MeV/c2,M(Ξb0)=5788.7±4.3(stat) ±1.4(syst)MeV/c2,andM(Ωb-)=6047.5±3.8(stat)±0.6(syst) MeV/c2.The isospin splitting of the Ξb-,0 states is found to be M(Ξb-)-M(Ξb0)=4.7±4.7(stat)±0.7(syst)MeV/c2. The isospin splitting of the Ξc0,+ states is found to be M(Ξc0)-M(Ξc+)=2. 85±0.30(stat)±0.04(syst)MeV/c2. The following lifetime measurements are made: τ(Λb)=1.565±0.035(stat)±0. 020(syst)ps,τ(Ξb-)=1.32±0.14(stat)±0.02(syst)ps, τ(Ωb-)=1.66-0.40+0.53(stat)±0.02(syst)ps. © 2014 American Physical Society.This work was supported by the U.S. Department of Energy and National Science Foundation; the Italian Istituto Nazionale di Fisica Nucleare; the Ministry of Education, Culture, Sports, Science and Technology of Japan; the Natural Sciences and Engineering Research Council of Canada; the National Science Council of the Republic of China; the Swiss National Science Foundation; the A. P. Sloan Foundation; the Bundesministerium für Bildung und Forschung, Germany; the Korean World Class University Program, the National Research Foundation of Korea; the Science and Technology Facilities Council and the Royal Society, UK; the Russian Foundation for Basic Research; the Ministerio de Ciencia e Innovación, and Programa Consolider-Ingenio 2010, Spain; the Slovak R&D Agency; the Academy of Finland; and the Australian Research Council (ARC); and the EU community Marie Curie Fellowship Contract No. 302103.Peer ReviewedAmerican Physical Society2015201520142015info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/110405reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1103/PhysRevD.89.072014info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1104052026-05-22T06:33:51Z
dc.title.none.fl_str_mv Mass and lifetime measurements of bottom and charm baryons in pp ̄ collisions at √s=1.96 TeV
title Mass and lifetime measurements of bottom and charm baryons in pp ̄ collisions at √s=1.96 TeV
spellingShingle Mass and lifetime measurements of bottom and charm baryons in pp ̄ collisions at √s=1.96 TeV
Aaltonen, T.
title_short Mass and lifetime measurements of bottom and charm baryons in pp ̄ collisions at √s=1.96 TeV
title_full Mass and lifetime measurements of bottom and charm baryons in pp ̄ collisions at √s=1.96 TeV
title_fullStr Mass and lifetime measurements of bottom and charm baryons in pp ̄ collisions at √s=1.96 TeV
title_full_unstemmed Mass and lifetime measurements of bottom and charm baryons in pp ̄ collisions at √s=1.96 TeV
title_sort Mass and lifetime measurements of bottom and charm baryons in pp ̄ collisions at √s=1.96 TeV
dc.creator.none.fl_str_mv Aaltonen, T.
Casal, Bruno
Cuevas, Javier
Gómez, Gervasio
Palencia, Enrique
Ruiz Jimeno, Alberto
Scodellaro, Luca
Vilar Cortabitarte, R.
Vizán, J.
CDF Collaboration
author Aaltonen, T.
author_facet Aaltonen, T.
Casal, Bruno
Cuevas, Javier
Gómez, Gervasio
Palencia, Enrique
Ruiz Jimeno, Alberto
Scodellaro, Luca
Vilar Cortabitarte, R.
Vizán, J.
CDF Collaboration
author_role author
author2 Casal, Bruno
Cuevas, Javier
Gómez, Gervasio
Palencia, Enrique
Ruiz Jimeno, Alberto
Scodellaro, Luca
Vilar Cortabitarte, R.
Vizán, J.
CDF Collaboration
author2_role author
author
author
author
author
author
author
author
author
description We report on mass and lifetime measurements of several ground state charmed and bottom baryons, using a data sample corresponding to 9.6fb-1 from pp̄ collisions at s=1.96TeV and recorded with the Collider Detector at Fermilab. Baryon candidates are reconstructed from data collected with an online event selection designed for the collection of long-lifetime heavy-flavor decay products and a second event selection designed to collect J/ ψ→μ+μ- candidates. First evidence for the process Ωb-→Ωc0π- is presented with a significance of 3.3σ. We measure the following baryon masses: M(Ξc0)=2470.85±0.24(stat) ±0.55(syst)MeV/c2,M(Ξc+)=2468.00±0.18(stat)±0.51(syst) MeV/c2,M(Λb)=5620.15±0.31(stat)±0.47(syst)MeV/c2,M(Ξb-)= 5793.4±1.8(stat)±0.7(syst)MeV/c2,M(Ξb0)=5788.7±4.3(stat) ±1.4(syst)MeV/c2,andM(Ωb-)=6047.5±3.8(stat)±0.6(syst) MeV/c2.The isospin splitting of the Ξb-,0 states is found to be M(Ξb-)-M(Ξb0)=4.7±4.7(stat)±0.7(syst)MeV/c2. The isospin splitting of the Ξc0,+ states is found to be M(Ξc0)-M(Ξc+)=2. 85±0.30(stat)±0.04(syst)MeV/c2. The following lifetime measurements are made: τ(Λb)=1.565±0.035(stat)±0. 020(syst)ps,τ(Ξb-)=1.32±0.14(stat)±0.02(syst)ps, τ(Ωb-)=1.66-0.40+0.53(stat)±0.02(syst)ps. © 2014 American Physical Society.
publishDate 2014
dc.date.none.fl_str_mv 2014
2015
2015
2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/110405
url http://hdl.handle.net/10261/110405
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1103/PhysRevD.89.072014
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
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repository.mail.fl_str_mv
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