Constraints on new phenomena via Higgs boson couplings and invisible decays with the ATLAS detector

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Abstract: The ATLAS experiment at the LHC has measured the Higgs boson couplings and mass, and searched for invisible Higgs boson decays, using multiple production and decay channels with up to 4.7 fb −1 of pp collision data at −1 at TeV. In the current study, the measured production and decay rates...

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Autor principal: The ATLAS collaboration
Formato: JOUR
Materias:
Dark matter
Hadron-Hadron Scattering
Higgs physics
Supersymmetry
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_11266708_v2015_n11_p1_TheATLAScollaboration
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_11266708_v2015_n11_p1_TheATLAScollaboration
record_format dspace
spelling todo:paper_11266708_v2015_n11_p1_TheATLAScollaboration2023-10-03T16:07:17Z Constraints on new phenomena via Higgs boson couplings and invisible decays with the ATLAS detector The ATLAS collaboration Dark matter Hadron-Hadron Scattering Higgs physics Supersymmetry Abstract: The ATLAS experiment at the LHC has measured the Higgs boson couplings and mass, and searched for invisible Higgs boson decays, using multiple production and decay channels with up to 4.7 fb −1 of pp collision data at −1 at TeV. In the current study, the measured production and decay rates of the observed Higgs boson in the γγ, ZZ, W W , Zγ, bb, τ τ , and μμ decay channels, along with results from the associated production of a Higgs boson with a top-quark pair, are used to probe the scaling of the couplings with mass. Limits are set on parameters in extensions of the Standard Model including a composite Higgs boson, an additional electroweak singlet, and two-Higgs-doublet models. Together with the measured mass of the scalar Higgs boson in the γγ and ZZ decay modes, a lower limit is set on the pseudoscalar Higgs boson mass of m A > 370 GeV in the “hMSSM” simplified Minimal Supersymmetric Standard Model. Results from direct searches for heavy Higgs bosons are also interpreted in the hMSSM. Direct searches for invisible Higgs boson decays in the vector-boson fusion and associated production of a Higgs boson with W/Z (Z → ℓℓ, W/Z → jj) modes are statistically combined to set an upper limit on the Higgs boson invisible branching ratio of 0.25. The use of the measured visible decay rates in a more general coupling fit improves the upper limit to 0.23, constraining a Higgs portal model of dark matter.[Figure not available: see fulltext.] © 2015, 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_11266708_v2015_n11_p1_TheATLAScollaboration
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Dark matter
Hadron-Hadron Scattering
Higgs physics
Supersymmetry
spellingShingle Dark matter
Hadron-Hadron Scattering
Higgs physics
Supersymmetry
The ATLAS collaboration
Constraints on new phenomena via Higgs boson couplings and invisible decays with the ATLAS detector
topic_facet Dark matter
Hadron-Hadron Scattering
Higgs physics
Supersymmetry
description Abstract: The ATLAS experiment at the LHC has measured the Higgs boson couplings and mass, and searched for invisible Higgs boson decays, using multiple production and decay channels with up to 4.7 fb −1 of pp collision data at −1 at TeV. In the current study, the measured production and decay rates of the observed Higgs boson in the γγ, ZZ, W W , Zγ, bb, τ τ , and μμ decay channels, along with results from the associated production of a Higgs boson with a top-quark pair, are used to probe the scaling of the couplings with mass. Limits are set on parameters in extensions of the Standard Model including a composite Higgs boson, an additional electroweak singlet, and two-Higgs-doublet models. Together with the measured mass of the scalar Higgs boson in the γγ and ZZ decay modes, a lower limit is set on the pseudoscalar Higgs boson mass of m A > 370 GeV in the “hMSSM” simplified Minimal Supersymmetric Standard Model. Results from direct searches for heavy Higgs bosons are also interpreted in the hMSSM. Direct searches for invisible Higgs boson decays in the vector-boson fusion and associated production of a Higgs boson with W/Z (Z → ℓℓ, W/Z → jj) modes are statistically combined to set an upper limit on the Higgs boson invisible branching ratio of 0.25. The use of the measured visible decay rates in a more general coupling fit improves the upper limit to 0.23, constraining a Higgs portal model of dark matter.[Figure not available: see fulltext.] © 2015, The Author(s).
format JOUR
author The ATLAS collaboration
author_facet The ATLAS collaboration
author_sort The ATLAS collaboration
title Constraints on new phenomena via Higgs boson couplings and invisible decays with the ATLAS detector
title_short Constraints on new phenomena via Higgs boson couplings and invisible decays with the ATLAS detector
title_full Constraints on new phenomena via Higgs boson couplings and invisible decays with the ATLAS detector
title_fullStr Constraints on new phenomena via Higgs boson couplings and invisible decays with the ATLAS detector
title_full_unstemmed Constraints on new phenomena via Higgs boson couplings and invisible decays with the ATLAS detector
title_sort constraints on new phenomena via higgs boson couplings and invisible decays with the atlas detector
url http://hdl.handle.net/20.500.12110/paper_11266708_v2015_n11_p1_TheATLAScollaboration
work_keys_str_mv AT theatlascollaboration constraintsonnewphenomenaviahiggsbosoncouplingsandinvisibledecayswiththeatlasdetector
_version_ 1807315752972189696

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