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Sensitivity to new physics scenarios in invisible Higgs boson decays at CLIC
We studied the possibility of measuring invisible Higgs boson decays at CLIC running at 380 GeV and 1.5 TeV. The analysis is based on the WHIZARD event generation and fast simulation of the CLIC detector response with DELPHES. The approach consisting of a two step analysis was used to optimize separ...
Autores principales: | , , , |
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Lenguaje: | eng |
Publicado: |
2020
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Materias: | |
Acceso en línea: | http://cds.cern.ch/record/2709497 |
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author | Mekala, K. Zarnecki, A.F. Grzadkowski, B. Iglicki, M. |
author_facet | Mekala, K. Zarnecki, A.F. Grzadkowski, B. Iglicki, M. |
author_sort | Mekala, K. |
collection | CERN |
description | We studied the possibility of measuring invisible Higgs boson decays at CLIC running at 380 GeV and 1.5 TeV. The analysis is based on the WHIZARD event generation and fast simulation of the CLIC detector response with DELPHES. The approach consisting of a two step analysis was used to optimize separation between signal and background processes. First, a set of preselection cuts was applied; then, multivariate analysis methods were employed to optimise the significance of observations. We estimated the expected limits on the invisible decays of the 125 GeV Higgs boson, as well as the cross section limits for production of an additional neutral Higgs-like scalar, assuming its invisible decays, as a function of its mass. Extracted model-independent branching ratio and cross section limits were then interpreted in the framework of the vector-fermion dark matter model to set limits on the mixing angle between the SM-like Higss boson and the new scalar of the "dark sector". |
id | cern-2709497 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2020 |
record_format | invenio |
spelling | cern-27094972021-07-29T08:22:16Zhttp://cds.cern.ch/record/2709497engMekala, K.Zarnecki, A.F.Grzadkowski, B.Iglicki, M.Sensitivity to new physics scenarios in invisible Higgs boson decays at CLICParticle Physics - Experimenthep-phParticle Physics - Phenomenologyhep-exWe studied the possibility of measuring invisible Higgs boson decays at CLIC running at 380 GeV and 1.5 TeV. The analysis is based on the WHIZARD event generation and fast simulation of the CLIC detector response with DELPHES. The approach consisting of a two step analysis was used to optimize separation between signal and background processes. First, a set of preselection cuts was applied; then, multivariate analysis methods were employed to optimise the significance of observations. We estimated the expected limits on the invisible decays of the 125 GeV Higgs boson, as well as the cross section limits for production of an additional neutral Higgs-like scalar, assuming its invisible decays, as a function of its mass. Extracted model-independent branching ratio and cross section limits were then interpreted in the framework of the vector-fermion dark matter model to set limits on the mixing angle between the SM-like Higss boson and the new scalar of the "dark sector".We studied the possibility of measuring invisible Higgs boson decays at CLIC running at 380 GeV and 1.5 TeV. The analysis is based on the WHIZARD event generation and fast simulation of the CLIC detector response with DELPHES. We considered $e^+e^-$ background processes but also relevant $\gamma\gamma$ and $\gamma e^\pm$ interactions. The approach consisting of a two step analysis was used to optimize separation between signal and background processes. First, a set of preselection cuts was applied; then, multivariate analysis methods were employed to optimise the significance of observations. We estimated the expected limits on the invisible decays of the 125 GeV Higgs boson, as well as the cross section limits for production of an additional neutral Higgs-like scalar, assuming its invisible decays, as a function of its mass. Extracted model-independent branching ratio and cross section limits were then interpreted in the framework of the vector-fermion dark matter model to set limits on the mixing angle between the SM-like Higss boson and the new scalar of the "dark sector".arXiv:2002.06034CLICdp-Conf-2020-002CLICdp-Pub-2020-002oai:cds.cern.ch:27094972020 |
spellingShingle | Particle Physics - Experiment hep-ph Particle Physics - Phenomenology hep-ex Mekala, K. Zarnecki, A.F. Grzadkowski, B. Iglicki, M. Sensitivity to new physics scenarios in invisible Higgs boson decays at CLIC |
title | Sensitivity to new physics scenarios in invisible Higgs boson decays at CLIC |
title_full | Sensitivity to new physics scenarios in invisible Higgs boson decays at CLIC |
title_fullStr | Sensitivity to new physics scenarios in invisible Higgs boson decays at CLIC |
title_full_unstemmed | Sensitivity to new physics scenarios in invisible Higgs boson decays at CLIC |
title_short | Sensitivity to new physics scenarios in invisible Higgs boson decays at CLIC |
title_sort | sensitivity to new physics scenarios in invisible higgs boson decays at clic |
topic | Particle Physics - Experiment hep-ph Particle Physics - Phenomenology hep-ex |
url | http://cds.cern.ch/record/2709497 |
work_keys_str_mv | AT mekalak sensitivitytonewphysicsscenariosininvisiblehiggsbosondecaysatclic AT zarneckiaf sensitivitytonewphysicsscenariosininvisiblehiggsbosondecaysatclic AT grzadkowskib sensitivitytonewphysicsscenariosininvisiblehiggsbosondecaysatclic AT iglickim sensitivitytonewphysicsscenariosininvisiblehiggsbosondecaysatclic |