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Constraint on the total width of the Higgs boson from Higgs boson and four-top-quark measurements in pp collisions at √s = 13 TeV with the ATLAS detector

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dc.contributor.authorAad, G.
dc.contributor.authorAakvaag, E.
dc.contributor.authorAbbott, B.
dc.contributor.authorAbdelhameed, S.
dc.contributor.authorAbeling, K.
dc.contributor.authorAbicht, N.J.
dc.contributor.authorAbidi, S.H.
dc.contributor.authorAboelela, M.
dc.contributor.authorAboulhorma, A.
dc.contributor.authorAbramowicz, H.
dc.contributor.authorAbreu, H.
dc.contributor.authorAbulaiti, Y.
dc.contributor.authorAcharya, B.S.
dc.contributor.authorAckermann, A.
dc.contributor.authorAdam Bourdarios, C.
dc.contributor.authorAdamczyk, L.
dc.contributor.authorAddepalli, S.V.
dc.contributor.authorAddison, M.J.
dc.contributor.authorAdelman, J.
dc.contributor.authorAdiguzel, A.
dc.contributor.authoret al.
dc.date.issued2025
dc.descriptionLetter
dc.description.abstractThis Letter presents a constraint on the total width of the Higgs boson (Γ(𝐻)) using a combined measurement of on-shell Higgs boson production and the production of four top quarks, which involves contributions from offshell Higgs boson-mediated processes. This method relies on the assumption that the tree-level Higgs-top Yukawa coupling strength is the same for on-shell and off-shell Higgs boson production processes, thereby avoiding any assumptions about the relationship between on-shell and off-shell gluon fusion Higgs production rates, which were central to previous measurements. The result is based on up to 140 fb (−1) of proton–proton collisions at a centre-of-mass energy of √𝑠 = 13 TeV collected with the ATLAS detector at the Large Hadron Collider. The observed (expected) 95% cofidence level upper limit on Γ(𝐻) is 450 MeV (75 MeV). Additionally, considering the constraint on the Higgs-top Yukawa coupling from loop-induced Higgs boson production and decay processes further yields an observed (expected) upper limit of 160 MeV (55 MeV).
dc.description.statementofresponsibilityThe ATLAS Collaboration
dc.identifier.citationPhysics Letters B, 2025; 861:139277-1-139277-21
dc.identifier.doi10.1016/j.physletb.2025.139277
dc.identifier.issn0370-2693
dc.identifier.issn1873-2445
dc.identifier.orcidGallagher, J. [0000-0001-9284-6270]
dc.identifier.orcidJackson, P. [0000-0002-0847-402X]
dc.identifier.orcidKong, A.X.Y. [0000-0001-8063-8765]
dc.identifier.orcidOliver, J.L. [0000-0002-0713-6627]
dc.identifier.orcidPandya, H.D. [0000-0002-1199-945X]
dc.identifier.orcidPotti, H. [0000-0002-0800-9902]
dc.identifier.orcidRuggeri, T.A. [0000-0001-9941-1966]
dc.identifier.orcidTing, E.X.L. [0000-0002-5886-6339]
dc.identifier.orcidWhite, M.J. [0000-0001-5474-4580]
dc.identifier.urihttps://hdl.handle.net/2440/147211
dc.language.isoen
dc.publisherElsevier
dc.relation.grantARC
dc.rights© 2025 CERN for the benefit of the ATLAS Collaboration. Published by Elsevier B.V. Funded by SCOAP³. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
dc.source.urihttps://doi.org/10.1016/j.physletb.2025.139277
dc.subjectHiggs boson
dc.titleConstraint on the total width of the Higgs boson from Higgs boson and four-top-quark measurements in pp collisions at √s = 13 TeV with the ATLAS detector
dc.title.alternativeConstraint on the total width of the Higgs boson from Higgs boson and four-top-quark measurements in pp collisions at root s = 13 TeV with the ATLAS detector
dc.typeJournal article
pubs.publication-statusPublished

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