A search is conducted for new resonances decaying into a W or Z boson and a 125 GeV Higgs boson in the νν¯¯¯bb¯¯νν¯bb¯, ℓ±νbb¯¯ℓ±νbb¯, and ℓ+ℓ−bb¯¯ℓ+ℓ−bb¯ final states, where ℓ± = e± or μ±, in pp collisions at s√=13s=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 W h 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 W ′ and Z′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 7.3 × 10−1 pb depending on the model and mass of the resonance.
|Publication status||Published - 28 Mar 2018|
Bibliographical note52 pages in total, author list starting page 36, 8 figures, 5 tables, published version including Erratum corrections available at https://link.springer.com/article/10.1007%2FJHEP11%282018%29051. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2016-10