CERN Accelerating science

Article
Report number arXiv:2202.07953 ; CERN-EP-2021-258
Title Search for invisible Higgs-boson decays in events with vector-boson fusion signatures using 139 fb1 of proton-proton data recorded by the ATLAS experiment
Author(s) ATLAS Collaboration  Mostra tots els 2908 autors
Corporate Author(s) ATLAS Collaboration
Publication 2022-08-08
Imprint 16 Feb 2022
Number of pages 66
Note 63 pages in total, author list starting page 48, 14 figures, 9 tables, published in JHEP 08 (2022) 104. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2020-11
In: JHEP 2208 (2022) 104
DOI 10.1007/JHEP08(2022)104
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ATLAS
Free keywords Higgs physics ; exotics ; experimental results ; Vector Boson Fusion ; Higgs boson invisible decay ; Missing transverse energy
Abstract A direct search for Higgs bosons produced via vector-boson fusion and subsequently decaying into invisible particles is reported. The analysis uses 139 fb1 of pp collision data at a centre-of-mass energy of s=13TeV recorded by the ATLAS detector at the LHC. The observed numbers of events are found to be in agreement with the background expectation from Standard Model processes. For a scalar Higgs boson with a mass of 125 GeV and a Standard Model production cross section, an observed upper limit of 0.145 is placed on the branching fraction of its decay into invisible particles at 95% confidence level, with an expected limit of 0.103. These results are interpreted in the context of models where the Higgs boson acts as a portal to dark matter, and limits are set on the scattering cross section of weakly interacting massive particles and nucleons. Invisible decays of additional scalar bosons with masses from 50 GeV to 2 TeV are also studied, and the derived upper limits on the cross section times branching fraction decrease with increasing mass from 1.0 pb for a scalar boson mass of 50 GeV to 0.1 pb at a mass of 2 TeV.
Related document supersedes: ATLAS-CONF-2020-008
Copyright/License preprint: © 2021-2024 CERN (License: CC-BY-4.0)
publication: © 2022-2024 CERN (License: CC-BY-4.0), sponsored by SCOAP³



Corresponding record in: Inspire
Email contact: tatjana.lenz@cern.ch


 Registre creat el 2022-02-16, darrera modificació el 2024-09-28


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