Constraints on new phenomena via Higgs boson couplings and invisible decays with the ATLAS detector
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 √s = 7TeV and 20.3 fb-1 at √s = 8TeV. In the current study, the measured production...
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2015
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Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/79059 |
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I19-R120-10915-79059 |
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Universidad Nacional de La Plata |
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I-19 |
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R-120 |
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SEDICI (UNLP) |
language |
Inglés |
topic |
Ciencias Exactas Física supersymmetry hadron-hadron scattering Higgs physics dark matter |
spellingShingle |
Ciencias Exactas Física supersymmetry hadron-hadron scattering Higgs physics dark matter Alconada Verzini, María Josefina Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Monticelli, Fernando Gabriel Wahlberg, Hernán Pablo The ATLAS Collaboration Constraints on new phenomena via Higgs boson couplings and invisible decays with the ATLAS detector |
topic_facet |
Ciencias Exactas Física supersymmetry hadron-hadron scattering Higgs physics dark matter |
description |
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 √s = 7TeV and 20.3 fb-1 at √s = 8TeV. In the current study, the measured production and decay rates of the observed Higgs boson in the γγ, ZZ, WW, Zγ, bb, ττ, 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 mA > 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 t improves the upper limit to 0.23, constraining a Higgs portal model of dark matter. |
format |
Articulo Articulo |
author |
Alconada Verzini, María Josefina Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Monticelli, Fernando Gabriel Wahlberg, Hernán Pablo The ATLAS Collaboration |
author_facet |
Alconada Verzini, María Josefina Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Monticelli, Fernando Gabriel Wahlberg, Hernán Pablo The ATLAS Collaboration |
author_sort |
Alconada Verzini, María Josefina |
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 |
publishDate |
2015 |
url |
http://sedici.unlp.edu.ar/handle/10915/79059 |
work_keys_str_mv |
AT alconadaverzinimariajosefina constraintsonnewphenomenaviahiggsbosoncouplingsandinvisibledecayswiththeatlasdetector AT alonsofrancisco constraintsonnewphenomenaviahiggsbosoncouplingsandinvisibledecayswiththeatlasdetector AT arduhfranciscoanuar constraintsonnewphenomenaviahiggsbosoncouplingsandinvisibledecayswiththeatlasdetector AT dovamariateresa constraintsonnewphenomenaviahiggsbosoncouplingsandinvisibledecayswiththeatlasdetector AT monticellifernandogabriel constraintsonnewphenomenaviahiggsbosoncouplingsandinvisibledecayswiththeatlasdetector AT wahlberghernanpablo constraintsonnewphenomenaviahiggsbosoncouplingsandinvisibledecayswiththeatlasdetector AT theatlascollaboration constraintsonnewphenomenaviahiggsbosoncouplingsandinvisibledecayswiththeatlasdetector |
bdutipo_str |
Repositorios |
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1764820487070810113 |