Search for a heavy Higgs boson decaying into a Z boson and another heavy Higgs boson in the ๐“๐“bb and ๐“๐“WW final states in pp collisions at โˆšs = 13 TeV with the ATLAS detector

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Colleges, School and Institutes


A search for a heavy neutral Higgs boson, A, decaying into a Z boson and another heavy Higgs boson, H, is performed using a data sample corresponding to an integrated luminosity of 139 fb-1 from proton-proton collisions at โˆšsย = 13 TeV recorded by the ATLAS detector at the LHC. The search considers the Z boson decaying into electrons or muons and the H boson into a pair of b-quarks or W bosons. The mass range considered is 230-800 GeV for the A boson and 130-700 GeV for the H boson. The data are in good agreement with the background predicted by the Standard Model, and therefore 95% confidence-level upper limits forย ฯƒย ร— B(Aย โ†’ ZH)ย ร— B(H โ†’ย bb or H โ†’ย WW) are set. The upper limits are in the range 0.0062-0.380 pb for the H โ†’ bb channel and in the range 0.023-8.9 pb for the H โ†’ WW channel. An interpretation of the results in the context of two-Higgs-Doublet models is also given.

Bibliographic note

53 pages in total, author list starting page 37, 14 figures, 4 tables, published in Eur. Phys. J. C. All figures including auxiliary figures are available at


Original languageEnglish
Article number396
Number of pages36
JournalEur. Phys. J. C
Issue number5
Publication statusPublished - 7 May 2021


  • hep-ex