Search for $W^{\prime}\to tb$ decays in the hadronic final state with the ATLAS detector

A search for a new heavy boson $W^{\prime}$ in proton-proton collisions at $\sqrt{s}$ = 13 TeV is presented. The search focuses on the decay of the $W^{\prime}$ to a hadronic top quark and a bottom quark, using the full Run 2 dataset of the ATLAS detector. The hadronic decay of the top quark is identified using DNN-based boosted-object techniques. The dominant background is obtained by a data-driven method with small systematic uncertainties. The results are presented as upper limits on the right-handed $W^{\prime}$ production cross-section times the top-bottom channel branching ratio for several $W^{\prime}$ masses ranging from 1.5 to 5 TeV.