Study of the B+→J/ψΛ¯p decay in proton-proton collisions at √s =8 TeV
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/212361 |
Resumo: | A study of the B+→J/ψΛ¯p decay using proton-proton collision data collected at s√ = 8 TeV by the CMS experiment at the LHC, corresponding to an integrated luminosity of 19.6 fb−1, is presented. The ratio of branching fractions B(B+→J/ψΛ¯p)/B(B+→J/ψK∗(892)+) is measured to be (1.054 ± 0.057(stat) ± 0.035(syst) ± 0.011(B))%, where the last uncertainty reflects the uncertainties in the world-average branching fractions of Λ¯ and K*(892) + decays to reconstructed final states. The invariant mass distributions of the J/ψΛ¯ J/ψp, and Λ¯p systems produced in the B+→J/ψΛ¯p decay are investigated and found to be inconsistent with the pure phase space hypothesis. The analysis is extended by using a model-independent angular amplitude analysis, which shows that the observed invariant mass distributions are consistent with the contributions from excited kaons decaying to the Λ¯p system. |
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Sirunyan, A. M.Silveira, Gustavo Gil daCMS Collaboration2020-07-23T03:40:43Z20191029-8479http://hdl.handle.net/10183/212361001114865A study of the B+→J/ψΛ¯p decay using proton-proton collision data collected at s√ = 8 TeV by the CMS experiment at the LHC, corresponding to an integrated luminosity of 19.6 fb−1, is presented. The ratio of branching fractions B(B+→J/ψΛ¯p)/B(B+→J/ψK∗(892)+) is measured to be (1.054 ± 0.057(stat) ± 0.035(syst) ± 0.011(B))%, where the last uncertainty reflects the uncertainties in the world-average branching fractions of Λ¯ and K*(892) + decays to reconstructed final states. The invariant mass distributions of the J/ψΛ¯ J/ψp, and Λ¯p systems produced in the B+→J/ψΛ¯p decay are investigated and found to be inconsistent with the pure phase space hypothesis. The analysis is extended by using a model-independent angular amplitude analysis, which shows that the observed invariant mass distributions are consistent with the contributions from excited kaons decaying to the Λ¯p system.application/pdfengThe journal of high energy physics. Trieste. No. 12 (Dec. 2019), 100, 38 p.Aceleradores de partículasColisões proton-protonB physicsHadron-Hadron scattering (experiments)Study of the B+→J/ψΛ¯p decay in proton-proton collisions at √s =8 TeVEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001114865.pdf.txt001114865.pdf.txtExtracted Texttext/plain96626http://www.lume.ufrgs.br/bitstream/10183/212361/2/001114865.pdf.txt31ff636b40390f534bfa251f82f1172bMD52ORIGINAL001114865.pdfTexto completo (inglês)application/pdf624419http://www.lume.ufrgs.br/bitstream/10183/212361/1/001114865.pdfe597fc920d63848f5569d9e5b8774cc3MD5110183/2123612023-08-05 03:38:50.314635oai:www.lume.ufrgs.br:10183/212361Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-08-05T06:38:50Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Study of the B+→J/ψΛ¯p decay in proton-proton collisions at √s =8 TeV |
title |
Study of the B+→J/ψΛ¯p decay in proton-proton collisions at √s =8 TeV |
spellingShingle |
Study of the B+→J/ψΛ¯p decay in proton-proton collisions at √s =8 TeV Sirunyan, A. M. Aceleradores de partículas Colisões proton-proton B physics Hadron-Hadron scattering (experiments) |
title_short |
Study of the B+→J/ψΛ¯p decay in proton-proton collisions at √s =8 TeV |
title_full |
Study of the B+→J/ψΛ¯p decay in proton-proton collisions at √s =8 TeV |
title_fullStr |
Study of the B+→J/ψΛ¯p decay in proton-proton collisions at √s =8 TeV |
title_full_unstemmed |
Study of the B+→J/ψΛ¯p decay in proton-proton collisions at √s =8 TeV |
title_sort |
Study of the B+→J/ψΛ¯p decay in proton-proton collisions at √s =8 TeV |
author |
Sirunyan, A. M. |
author_facet |
Sirunyan, A. M. Silveira, Gustavo Gil da CMS Collaboration |
author_role |
author |
author2 |
Silveira, Gustavo Gil da CMS Collaboration |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Sirunyan, A. M. Silveira, Gustavo Gil da CMS Collaboration |
dc.subject.por.fl_str_mv |
Aceleradores de partículas Colisões proton-proton |
topic |
Aceleradores de partículas Colisões proton-proton B physics Hadron-Hadron scattering (experiments) |
dc.subject.eng.fl_str_mv |
B physics Hadron-Hadron scattering (experiments) |
description |
A study of the B+→J/ψΛ¯p decay using proton-proton collision data collected at s√ = 8 TeV by the CMS experiment at the LHC, corresponding to an integrated luminosity of 19.6 fb−1, is presented. The ratio of branching fractions B(B+→J/ψΛ¯p)/B(B+→J/ψK∗(892)+) is measured to be (1.054 ± 0.057(stat) ± 0.035(syst) ± 0.011(B))%, where the last uncertainty reflects the uncertainties in the world-average branching fractions of Λ¯ and K*(892) + decays to reconstructed final states. The invariant mass distributions of the J/ψΛ¯ J/ψp, and Λ¯p systems produced in the B+→J/ψΛ¯p decay are investigated and found to be inconsistent with the pure phase space hypothesis. The analysis is extended by using a model-independent angular amplitude analysis, which shows that the observed invariant mass distributions are consistent with the contributions from excited kaons decaying to the Λ¯p system. |
publishDate |
2019 |
dc.date.issued.fl_str_mv |
2019 |
dc.date.accessioned.fl_str_mv |
2020-07-23T03:40:43Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/212361 |
dc.identifier.issn.pt_BR.fl_str_mv |
1029-8479 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001114865 |
identifier_str_mv |
1029-8479 001114865 |
url |
http://hdl.handle.net/10183/212361 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
The journal of high energy physics. Trieste. No. 12 (Dec. 2019), 100, 38 p. |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
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reponame:Repositório Institucional da UFRGS instname:Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS |
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