Abstract
Abstract:
A search is conducted for new resonances decaying into a W or Z boson and a 125 GeV Higgs boson in
the νν¯bb¯, f±νbb¯, and f+f−bb¯ final states, where f± = e± or µ±, in pp collisions
at √s = 13 TeV. The data used correspond to a total integrated luminosity of 36.1 fb−1
collected with the ATLAS detector at the Large Hadron Collider during the 2015 and 2016 data-taking
periods. The search is conducted by examining the reconstructed invariant or transverse mass
distributions of Wh and Zh candidates for evidence of a localised excess in the mass range of 220
GeV up to 5 TeV. No significant excess is observed and the results are interpreted in terms of
constraints on the production cross-section times branching fraction of heavy Wt and Zt resonances
in heavy-vector-triplet models and the CP-odd scalar boson A in two-Higgs-doublet models. Upper
limits are placed at the 95% confidence level and range between 9.0 × 10−4 pb and 8.1 × 10−1 pb
depending on the model and mass of the resonance.