Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a Z boson in the ℓ^+ℓ^-tt¯ and νν¯bb¯ final states using 140 fb^−1 of data collected with the ATLAS detector : = Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a Z boson in the ℓ^+ℓ^-tt¯ and [ny][ny]¯bb¯ final states using 140 fb^−1 of data collected with the ATLAS detector

Abstract: 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 = 13TeV collected with the ATLAS detector, corresponding to an integrated luminosity of 140 fb−1. The search for A → ZH is performed in the ℓ+ℓ−t ̄t and ν ̄νb ̄b 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 m(t ̄t) and m(b ̄b) distributions in the ℓ+ℓ−t ̄t and ν ̄νb ̄b channels, respectively. In addition, the results are interpreted in the context of two-Higgs-doublet models

Alternative title
Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a Z boson in the ℓ^+ℓ^-tt¯ and [ny][ny]¯bb¯ final states using 140 fb^−1 of data collected with the ATLAS detector
Location
Deutsche Nationalbibliothek Frankfurt am Main
Extent
Online-Ressource
Language
Englisch
Notes
Journal of high energy physics. - 2024, 2 (2024) , 197, ISSN: 1029-8479

Event
Veröffentlichung
(where)
Freiburg
(who)
Universität
(when)
2024
Contributor
Experimentelle Teilchenphysik

DOI
10.1007/jhep02(2024)197
URN
urn:nbn:de:bsz:25-freidok-2533490
Rights
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Last update
25.03.2025, 1:51 PM CET

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Associated

Time of origin

  • 2024

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