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Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a Z boson in the ℓ+𝑡𝑡¯ and 𝜈𝜈¯𝑏𝑏¯ final states using 140 fb1 of data collected with the ATLAS detector
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).ORCID iD: 0000-0002-9766-2670
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).ORCID iD: 0000-0001-7489-9184
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).ORCID iD: 0000-0002-3380-8167
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Number of Authors: 29422024 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, Vol. 2024, no 2, article id 197Article in journal (Refereed) Published
Abstract [en]

A search for a heavy CP-odd Higgs boson, A, decaying into a Z boson and a heavy CP-even Higgs boson, H, is presented. It uses the full LHC Run 2 dataset of pp collisions at √𝑠 = 13 TeV collected with the ATLAS detector, corresponding to an integrated luminosity of 140 fb−1. The search for AZH is performed in the ℓ+ and final states and surpasses the reach of previous searches in different final states in the region with mH > 350 GeV and mA > 800 GeV. No significant deviation from the Standard Model expectation is found. Upper limits are placed on the production cross-section times the decay branching ratios. Limits with less model dependence are also presented as functions of the reconstructed and distributions in the ℓ+ and channels, respectively. In addition, the results are interpreted in the context of two-Higgs-doublet models.

Place, publisher, year, edition, pages
2024. Vol. 2024, no 2, article id 197
Keywords [en]
Hadron-Hadron Scattering
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:su:diva-228695DOI: 10.1007/JHEP02(2024)197ISI: 001185484300001Scopus ID: 2-s2.0-85190986940OAI: oai:DiVA.org:su-228695DiVA, id: diva2:1855579
Available from: 2024-05-02 Created: 2024-05-02 Last updated: 2024-05-02Bibliographically approved

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Andrean, Stefio Y.Backman, FilipBarranco Navarro, LauraBohm, ChristianClément, ChristopheDunne, KatherineHellman, StenIngebretsen Carlson, TomKim, DongwonLee, SuhyunLou, XuanhongMilstead, David A.Pasuwan, PatrawanPereira Sanchez, LauraRichter, StefanRiefel, Ellen MariaSilverstein, Samuel B.Sjölin, JörgenStrandberg, SaraStrübig, AntoniaValdés Santurio, Eduardo

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Andrean, Stefio Y.Backman, FilipBarranco Navarro, LauraBohm, ChristianClément, ChristopheDunne, KatherineHellman, StenIngebretsen Carlson, TomKim, DongwonLee, SuhyunLou, XuanhongMilstead, David A.Pasuwan, PatrawanPereira Sanchez, LauraRichter, StefanRiefel, Ellen MariaSilverstein, Samuel B.Sjölin, JörgenStrandberg, SaraStrübig, AntoniaValdés Santurio, Eduardo
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