Evidence of off-shell Higgs boson production from ZZ leptonic decay channels and constraints on its total width with the ATLAS detector

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dc.authoridKaryukhin, Andrey/0000-0001-9087-4315
dc.authoridMartin dit Latour, Bertrand/0000-0003-3420-2105
dc.authoridWang, Xin/0009-0004-7428-3071
dc.authoridBalek, Petr/0000-0002-0942-1966
dc.authoridSciandra, Andrea/0000-0001-7163-501X
dc.authoridLazzaroni, Massimo/0000-0002-4094-1273
dc.authoridLiu, Yining/0000-0002-2218-2349
dc.authorwosidWhite, Ryan M/E-2979-2015
dc.authorwosidStoicea, Gabriel/B-6717-2011
dc.authorwosidKaryukhin, Andrey/J-3904-2014
dc.authorwosidTapia, Sebastian/ABB-6644-2021
dc.authorwosidli, guo/KHU-1749-2024
dc.authorwosidTudorache, Alexandra/L-3557-2013
dc.authorwosidMartin dit Latour, Bertrand/JUV-5162-2023
dc.contributor.authorAad, G.
dc.contributor.authorAbbott, B.
dc.contributor.authorAbeling, K.
dc.contributor.authorAbidi, S. H.
dc.contributor.authorAboulhorma, A.
dc.contributor.authorAbramowicz, H.
dc.contributor.authorÇetin, Serkant Ali
dc.date.accessioned2024-05-19T14:50:30Z
dc.date.available2024-05-19T14:50:30Z
dc.date.issued2023
dc.departmentİstinye Üniversitesien_US
dc.description.abstractThis Letter reports on a search for off-shell production of the Higgs boson using 139 fb(-1) of pp collision data at root s = 13 TeV collected by the ATLAS detector at the Large Hadron Collider. The signature is a pair of Z bosons, with contributions from both the production and subsequent decay of a virtual Higgs boson and the interference of that process with other processes. The two observable final states are ZZ -> 4l and Z Z -> 2l2 nu with l = e or mu. In the ZZ -> 4l final state, a dense Neural Network is used to enhance analysis sensitivity with respect to matrix element-based discrimination. The background-only hypothesis is rejected with an observed (expected) significance of 3.3 (2.2) standard deviations, representing experimental evidence for off-shell Higgs boson production. Assuming that no new particles enter the production of the virtual Higgs boson, its total width can be deduced from the measurement of its off-shell production cross-section. The measured total width of the Higgs boson is 4.5(-2.5)(+3.3) MeV, and the observed (expected) upper limit on the total width is found to be 10.5 (10.9) MeV at 95% confidence level. (c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).en_US
dc.description.sponsorshipNDGF (Denmark, Norway, Sweden); KIT/GridKA (Germany); INFN-CNAF (Italy); NL-T1 (Netherlands) , PIC (Spain); ASGC (Taiwan); BNL (USA)en_US
dc.description.sponsorshipThe crucial computing support from all WLCG partners is ac-knowledged gratefully, in particular from CERN, the ATLAS Tier-1 facilities at TRIUMF (Canada) , NDGF (Denmark, Norway, Sweden) , CC-IN2P3 (France) , KIT/GridKA (Germany) , INFN-CNAF (Italy) , NL-T1 (Netherlands) , PIC (Spain) , ASGC (Taiwan) , RAL (UK) and BNL (USA) , the Tier-2 facilities worldwide and large non-WLCG resource providers. Major contributors of computing resources are listed in Ref. [90] .en_US
dc.identifier.doi10.1016/j.physletb.2023.138223
dc.identifier.issn0370-2693
dc.identifier.issn1873-2445
dc.identifier.scopus2-s2.0-85174896283en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org10.1016/j.physletb.2023.138223
dc.identifier.urihttps://hdl.handle.net/20.500.12713/5731
dc.identifier.volume846en_US
dc.identifier.wosWOS:001125380300001en_US
dc.identifier.wosqualityN/Aen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.relation.ispartofPhysics Letters Ben_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.snmz20240519_kaen_US
dc.subjectW+Wen_US
dc.titleEvidence of off-shell Higgs boson production from ZZ leptonic decay channels and constraints on its total width with the ATLAS detectoren_US
dc.typeArticleen_US

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