Higgs-boson visible and invisible constraints on hidden sectors
Abstract We investigate the impact of interactions between hidden sectors and the discovered Higgs boson $$h_{125}$$ h 125 , allowing for additional invisible decay channels of $$h_{125}$$ h 125 . We perform $$\chi ^2$$ χ 2 -fits to the measurements of the Higgs-boson cross sections as a function of...
Main Authors: | , |
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Format: | Article |
Language: | English |
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SpringerOpen
2022-11-01
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Series: | European Physical Journal C: Particles and Fields |
Online Access: | https://doi.org/10.1140/epjc/s10052-022-10990-x |
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author | Thomas Biekötter Mathias Pierre |
author_facet | Thomas Biekötter Mathias Pierre |
author_sort | Thomas Biekötter |
collection | DOAJ |
description | Abstract We investigate the impact of interactions between hidden sectors and the discovered Higgs boson $$h_{125}$$ h 125 , allowing for additional invisible decay channels of $$h_{125}$$ h 125 . We perform $$\chi ^2$$ χ 2 -fits to the measurements of the Higgs-boson cross sections as a function of the invisible branching ratio and different combinations of coupling modifiers, where the latter quantify modifications of the couplings of $$h_{125}$$ h 125 compared to the predictions of the Standard Model. We present generic results in terms of exclusion limits on the coupling modifiers and the invisible branching ratio of $$h_{125}$$ h 125 . Additionally, we apply our results to a variety of concrete model realizations containing a hidden sector: dark matter within Higgs- and singlet-portal scenarios, models featuring (pseudo) Nambu–Goldstone bosons and two Higgs doublet extensions. One of the main conclusions of our work is that in a wide class of models the indirect constraints resulting from the measurements of the cross sections of $$h_{125}$$ h 125 provide substantially stronger constraints on the invisible Higgs-boson branching ratio compared to the direct limits obtained from searches for the invisible decay of $$h_{125}$$ h 125 . However, we demonstrate that the presence of an invisible decay mode of $$h_{125}$$ h 125 can also open up parameter space regions which otherwise would be excluded as a result of the indirect constraints. As a byproduct of our analysis, we show that in light of the new results from the LZ collaboration a fermionic DM candidate within the simplest Higgs-portal scenario is ruled out under standard assumptions. |
first_indexed | 2024-04-11T15:56:21Z |
format | Article |
id | doaj.art-f21781bc736943118d00cb23fa99a147 |
institution | Directory Open Access Journal |
issn | 1434-6052 |
language | English |
last_indexed | 2024-04-11T15:56:21Z |
publishDate | 2022-11-01 |
publisher | SpringerOpen |
record_format | Article |
series | European Physical Journal C: Particles and Fields |
spelling | doaj.art-f21781bc736943118d00cb23fa99a1472022-12-22T04:15:10ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522022-11-01821112810.1140/epjc/s10052-022-10990-xHiggs-boson visible and invisible constraints on hidden sectorsThomas Biekötter0Mathias Pierre1Deutsches Elektronen-Synchrotron DESYDeutsches Elektronen-Synchrotron DESYAbstract We investigate the impact of interactions between hidden sectors and the discovered Higgs boson $$h_{125}$$ h 125 , allowing for additional invisible decay channels of $$h_{125}$$ h 125 . We perform $$\chi ^2$$ χ 2 -fits to the measurements of the Higgs-boson cross sections as a function of the invisible branching ratio and different combinations of coupling modifiers, where the latter quantify modifications of the couplings of $$h_{125}$$ h 125 compared to the predictions of the Standard Model. We present generic results in terms of exclusion limits on the coupling modifiers and the invisible branching ratio of $$h_{125}$$ h 125 . Additionally, we apply our results to a variety of concrete model realizations containing a hidden sector: dark matter within Higgs- and singlet-portal scenarios, models featuring (pseudo) Nambu–Goldstone bosons and two Higgs doublet extensions. One of the main conclusions of our work is that in a wide class of models the indirect constraints resulting from the measurements of the cross sections of $$h_{125}$$ h 125 provide substantially stronger constraints on the invisible Higgs-boson branching ratio compared to the direct limits obtained from searches for the invisible decay of $$h_{125}$$ h 125 . However, we demonstrate that the presence of an invisible decay mode of $$h_{125}$$ h 125 can also open up parameter space regions which otherwise would be excluded as a result of the indirect constraints. As a byproduct of our analysis, we show that in light of the new results from the LZ collaboration a fermionic DM candidate within the simplest Higgs-portal scenario is ruled out under standard assumptions.https://doi.org/10.1140/epjc/s10052-022-10990-x |
spellingShingle | Thomas Biekötter Mathias Pierre Higgs-boson visible and invisible constraints on hidden sectors European Physical Journal C: Particles and Fields |
title | Higgs-boson visible and invisible constraints on hidden sectors |
title_full | Higgs-boson visible and invisible constraints on hidden sectors |
title_fullStr | Higgs-boson visible and invisible constraints on hidden sectors |
title_full_unstemmed | Higgs-boson visible and invisible constraints on hidden sectors |
title_short | Higgs-boson visible and invisible constraints on hidden sectors |
title_sort | higgs boson visible and invisible constraints on hidden sectors |
url | https://doi.org/10.1140/epjc/s10052-022-10990-x |
work_keys_str_mv | AT thomasbiekotter higgsbosonvisibleandinvisibleconstraintsonhiddensectors AT mathiaspierre higgsbosonvisibleandinvisibleconstraintsonhiddensectors |