Search for Heavy Resonances Decaying Into a Z or W Boson and a Higgs Boson in Final States With Leptons and B-Jets in 139 Fb?1 of Pp Collisions at ?s = 13 Tev With the Atlas Detector

Abstract

This article presents a search for new resonances decaying into a Z or W boson and a 125 GeV Higgs boson h, and it targets the ??¯ bb¯ , ?+??bb¯ , or ?±?bb¯ final states, where ? = e or ?, in proton-proton collisions at s = 13 TeV. The data used correspond to a total integrated luminosity of 139 fb?1 collected by the ATLAS detector during Run 2 of the LHC at CERN. The search is conducted by examining the reconstructed invariant or transverse mass distributions of Zh or Wh candidates for evidence of a localised excess in the mass range from 220 GeV to 5 TeV. No significant excess is observed and 95% confidence-level upper limits between 1.3 pb and 0.3 fb are placed on the production cross section times branching fraction of neutral and charged spin-1 resonances and CP-odd scalar bosons. These limits are converted into constraints on the parameter space of the Heavy Vector Triplet model and the two-Higgs-doublet model. [Figure not available: see fulltext.]. © 2023, The Author(s).