Search for a light charged Higgs boson in t → H<SUP>±</SUP>b decays, with H<SUP>±</SUP> → cb, in the lepton plus jets final state in proton-proton collisions at √s=13 TeV with the ATLAS detector
Autor(a) principal: | |
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Data de Publicação: | 2023 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | https://hdl.handle.net/1822/87864 |
Resumo: | A search for a charged Higgs boson, H±, produced in top-quark decays, t → H±b, is presented. The search targets H± decays into a bottom and a charm quark, H± → cb. The analysis focuses on a selection enriched in top-quark pair production, where one top quark decays into a leptonically decaying W boson and a bottom quark, and the other top quark decays into a charged Higgs boson and a bottom quark. This topology leads to a lepton-plus-jets final state, characterised by an isolated electron or muon and at least four jets. The search exploits the high multiplicity of jets containing b-hadrons, and deploys a neural network classifier that uses the kinematic differences between the signal and the background. The search uses a dataset of proton-proton collisions collected at a centre-of-mass energy √ s = 13 TeV between 2015 and 2018 with the ATLAS detector at CERN’s Large Hadron Collider, amounting to an integrated luminosity of 139 fb−1. Observed (expected) 95% confidence-level upper limits between 0.15% (0.09%) and 0.42% (0.25%) are derived for the product of branching fractions B(t → H±b) × B(H± → cb) for charged Higgs boson masses between 60 and 160 GeV, assuming the SM production of the top-quark pairs. |
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7160 |
spelling |
Search for a light charged Higgs boson in t → H<SUP>±</SUP>b decays, with H<SUP>±</SUP> → cb, in the lepton plus jets final state in proton-proton collisions at √s=13 TeV with the ATLAS detectorCiências Naturais::Ciências FísicasA search for a charged Higgs boson, H±, produced in top-quark decays, t → H±b, is presented. The search targets H± decays into a bottom and a charm quark, H± → cb. The analysis focuses on a selection enriched in top-quark pair production, where one top quark decays into a leptonically decaying W boson and a bottom quark, and the other top quark decays into a charged Higgs boson and a bottom quark. This topology leads to a lepton-plus-jets final state, characterised by an isolated electron or muon and at least four jets. The search exploits the high multiplicity of jets containing b-hadrons, and deploys a neural network classifier that uses the kinematic differences between the signal and the background. The search uses a dataset of proton-proton collisions collected at a centre-of-mass energy √ s = 13 TeV between 2015 and 2018 with the ATLAS detector at CERN’s Large Hadron Collider, amounting to an integrated luminosity of 139 fb−1. Observed (expected) 95% confidence-level upper limits between 0.15% (0.09%) and 0.42% (0.25%) are derived for the product of branching fractions B(t → H±b) × B(H± → cb) for charged Higgs boson masses between 60 and 160 GeV, assuming the SM production of the top-quark pairs.info:eu-repo/semantics/publishedVersionSpringerUniversidade do MinhoCastro, Nuno FilipeOnofre, A.ATLAS Collaboration20232023-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/87864engAad, G., Abbott, B., Abbott, D. C., Abud, A. A., Abeling, K., Abhayasinghe, D. K., . . . Collaboration, A. (2023). Search for a light charged Higgs boson in t → H<SUP>±</SUP>b decays, with H<SUP>±</SUP> → cb, in the lepton plus jets final state in proton-proton collisions at √s=13 TeV with the ATLAS detector. Journal of High Energy Physics(9). doi: 10.1007/jhep09(2023)0041126-67081029-847910.1007/jhep09(2023)004https://link.springer.com/article/10.1007/JHEP09(2023)004info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-06T01:29:24Zoai:repositorium.sdum.uminho.pt:1822/87864Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:30:26.081375Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Search for a light charged Higgs boson in t → H<SUP>±</SUP>b decays, with H<SUP>±</SUP> → cb, in the lepton plus jets final state in proton-proton collisions at √s=13 TeV with the ATLAS detector |
title |
Search for a light charged Higgs boson in t → H<SUP>±</SUP>b decays, with H<SUP>±</SUP> → cb, in the lepton plus jets final state in proton-proton collisions at √s=13 TeV with the ATLAS detector |
spellingShingle |
Search for a light charged Higgs boson in t → H<SUP>±</SUP>b decays, with H<SUP>±</SUP> → cb, in the lepton plus jets final state in proton-proton collisions at √s=13 TeV with the ATLAS detector Castro, Nuno Filipe Ciências Naturais::Ciências Físicas |
title_short |
Search for a light charged Higgs boson in t → H<SUP>±</SUP>b decays, with H<SUP>±</SUP> → cb, in the lepton plus jets final state in proton-proton collisions at √s=13 TeV with the ATLAS detector |
title_full |
Search for a light charged Higgs boson in t → H<SUP>±</SUP>b decays, with H<SUP>±</SUP> → cb, in the lepton plus jets final state in proton-proton collisions at √s=13 TeV with the ATLAS detector |
title_fullStr |
Search for a light charged Higgs boson in t → H<SUP>±</SUP>b decays, with H<SUP>±</SUP> → cb, in the lepton plus jets final state in proton-proton collisions at √s=13 TeV with the ATLAS detector |
title_full_unstemmed |
Search for a light charged Higgs boson in t → H<SUP>±</SUP>b decays, with H<SUP>±</SUP> → cb, in the lepton plus jets final state in proton-proton collisions at √s=13 TeV with the ATLAS detector |
title_sort |
Search for a light charged Higgs boson in t → H<SUP>±</SUP>b decays, with H<SUP>±</SUP> → cb, in the lepton plus jets final state in proton-proton collisions at √s=13 TeV with the ATLAS detector |
author |
Castro, Nuno Filipe |
author_facet |
Castro, Nuno Filipe Onofre, A. ATLAS Collaboration |
author_role |
author |
author2 |
Onofre, A. ATLAS Collaboration |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Castro, Nuno Filipe Onofre, A. ATLAS Collaboration |
dc.subject.por.fl_str_mv |
Ciências Naturais::Ciências Físicas |
topic |
Ciências Naturais::Ciências Físicas |
description |
A search for a charged Higgs boson, H±, produced in top-quark decays, t → H±b, is presented. The search targets H± decays into a bottom and a charm quark, H± → cb. The analysis focuses on a selection enriched in top-quark pair production, where one top quark decays into a leptonically decaying W boson and a bottom quark, and the other top quark decays into a charged Higgs boson and a bottom quark. This topology leads to a lepton-plus-jets final state, characterised by an isolated electron or muon and at least four jets. The search exploits the high multiplicity of jets containing b-hadrons, and deploys a neural network classifier that uses the kinematic differences between the signal and the background. The search uses a dataset of proton-proton collisions collected at a centre-of-mass energy √ s = 13 TeV between 2015 and 2018 with the ATLAS detector at CERN’s Large Hadron Collider, amounting to an integrated luminosity of 139 fb−1. Observed (expected) 95% confidence-level upper limits between 0.15% (0.09%) and 0.42% (0.25%) are derived for the product of branching fractions B(t → H±b) × B(H± → cb) for charged Higgs boson masses between 60 and 160 GeV, assuming the SM production of the top-quark pairs. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023 2023-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://hdl.handle.net/1822/87864 |
url |
https://hdl.handle.net/1822/87864 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Aad, G., Abbott, B., Abbott, D. C., Abud, A. A., Abeling, K., Abhayasinghe, D. K., . . . Collaboration, A. (2023). Search for a light charged Higgs boson in t → H<SUP>±</SUP>b decays, with H<SUP>±</SUP> → cb, in the lepton plus jets final state in proton-proton collisions at √s=13 TeV with the ATLAS detector. Journal of High Energy Physics(9). doi: 10.1007/jhep09(2023)004 1126-6708 1029-8479 10.1007/jhep09(2023)004 https://link.springer.com/article/10.1007/JHEP09(2023)004 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Springer |
publisher.none.fl_str_mv |
Springer |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799136786246533120 |