A search for resonances decaying into a Higgs boson and a new particle X in the XH → qqbb final state with the ATLAS detector

A search for heavy resonances decaying into a Higgs boson (H) and a new particle (X) is reported, utilizing 36.1 fb −1 of proton–proton collision data at s=13TeV collected during 2015 and 2016 with the ATLAS detector at the CERN Large Hadron Collider. The particle X is assumed to decay to a pair of...

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Autor principal: Aaboud, M.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03702693_v779_n_p24_Aaboud
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_03702693_v779_n_p24_Aaboud2023-10-03T15:29:58Z A search for resonances decaying into a Higgs boson and a new particle X in the XH → qqbb final state with the ATLAS detector Aaboud, M. A search for heavy resonances decaying into a Higgs boson (H) and a new particle (X) is reported, utilizing 36.1 fb −1 of proton–proton collision data at s=13TeV collected during 2015 and 2016 with the ATLAS detector at the CERN Large Hadron Collider. The particle X is assumed to decay to a pair of light quarks, and the fully hadronic final state XH→qq¯ ′ bb¯ is analysed. The search considers the regime of high XH resonance masses, where the X and H bosons are both highly Lorentz-boosted and are each reconstructed using a single jet with large radius parameter. A two-dimensional phase space of XH mass versus X mass is scanned for evidence of a signal, over a range of XH resonance mass values between 1 TeV and 4 TeV, and for X particles with masses from 50 GeV to 1000 GeV. All search results are consistent with the expectations for the background due to Standard Model processes, and 95% CL upper limits are set, as a function of XH and X masses, on the production cross-section of the XH→qq¯ ′ bb¯ resonance. © 2018 The Author(s) JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03702693_v779_n_p24_Aaboud
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description A search for heavy resonances decaying into a Higgs boson (H) and a new particle (X) is reported, utilizing 36.1 fb −1 of proton–proton collision data at s=13TeV collected during 2015 and 2016 with the ATLAS detector at the CERN Large Hadron Collider. The particle X is assumed to decay to a pair of light quarks, and the fully hadronic final state XH→qq¯ ′ bb¯ is analysed. The search considers the regime of high XH resonance masses, where the X and H bosons are both highly Lorentz-boosted and are each reconstructed using a single jet with large radius parameter. A two-dimensional phase space of XH mass versus X mass is scanned for evidence of a signal, over a range of XH resonance mass values between 1 TeV and 4 TeV, and for X particles with masses from 50 GeV to 1000 GeV. All search results are consistent with the expectations for the background due to Standard Model processes, and 95% CL upper limits are set, as a function of XH and X masses, on the production cross-section of the XH→qq¯ ′ bb¯ resonance. © 2018 The Author(s)
format JOUR
author Aaboud, M.
spellingShingle Aaboud, M.
A search for resonances decaying into a Higgs boson and a new particle X in the XH → qqbb final state with the ATLAS detector
author_facet Aaboud, M.
author_sort Aaboud, M.
title A search for resonances decaying into a Higgs boson and a new particle X in the XH → qqbb final state with the ATLAS detector
title_short A search for resonances decaying into a Higgs boson and a new particle X in the XH → qqbb final state with the ATLAS detector
title_full A search for resonances decaying into a Higgs boson and a new particle X in the XH → qqbb final state with the ATLAS detector
title_fullStr A search for resonances decaying into a Higgs boson and a new particle X in the XH → qqbb final state with the ATLAS detector
title_full_unstemmed A search for resonances decaying into a Higgs boson and a new particle X in the XH → qqbb final state with the ATLAS detector
title_sort search for resonances decaying into a higgs boson and a new particle x in the xh → qqbb final state with the atlas detector
url http://hdl.handle.net/20.500.12110/paper_03702693_v779_n_p24_Aaboud
work_keys_str_mv AT aaboudm asearchforresonancesdecayingintoahiggsbosonandanewparticlexinthexhqqbbfinalstatewiththeatlasdetector
AT aaboudm searchforresonancesdecayingintoahiggsbosonandanewparticlexinthexhqqbbfinalstatewiththeatlasdetector
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