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Search for invisible decays of a Higgs boson using vector-boson fusion in pp collisions at root s=8 TeV with the ATLAS detector
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-8913-0981
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Number of Authors: 2859
2016 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 1, 172Article in journal (Refereed) PublishedText
Abstract [en]

A search for a Higgs boson produced via vector-boson fusion and decaying into invisible particles is presented, using 20.3 fb(-1) of proton-proton collision data at a centre-of-mass energy of 8TeV recorded by the ATLAS detector at the LHC. For a Higgs boson with a mass of 125 GeV, assuming the Standard Model production cross section, an upper bound of 0.28 is set on the branching fraction of H -> invisible at 95% confidence level, where the expected upper limit is 0.31. The results are interpreted in models of Higgs-portal dark matter where the branching fraction limit is converted into upper bounds on the dark-matter-nucleon scattering cross section as a function of the dark-matter particle mass, and compared to results from the direct dark-matter detection experiments.

Place, publisher, year, edition, pages
Springer, 2016. no 1, 172
Keyword [en]
Hadron-Hadron scattering, Higgs physics
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-183280DOI: 10.1007/JHEP01(2016)172ISI: 000369302700001ScopusID: 2-s2.0-84957801044OAI: oai:DiVA.org:kth-183280DiVA: diva2:909103
Funder
Knut and Alice Wallenberg FoundationSwedish Research Council
Note

QC 20160304

Available from: 2016-03-04 Created: 2016-03-04 Last updated: 2016-03-04Bibliographically approved

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Lund-Jensen, BengtSidebo, Per EdvinStrandberg, Jonas
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