Search for a heavy Higgs boson decaying into a Z boson and another heavy Higgs boson in the bb and WW final states in pp collisions at √ s = 13 TeV with the ATLAS detector

• Autor(a) principal: Fiolhais, M. C. N.
• Data de Publicação: 2021
• Outros Autores: Gonçalo, R., Veloso, F., Wolters, H., ATLAS Collaboration
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10316/103910; https://doi.org/10.1140/epjc/s10052-021-09117-5

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 √ s = 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 for σ × B(A → ZH) × B(H → bb or H → WW) are set. The upper limits are in the range 0.0062–0.380 pb for the H → bb channel and in the range 0.023–8.9 pb for the H → WW channel. An interpretation of the results in the context of two-Higgs-doublet models is also given.