Search for a heavy charged Higgs boson decaying into a W boson and a Higgs boson in final states with leptons and b-jets in √s = 13 TeV pp collisions with the ATLAS detector

Abstract

This article presents a search for a heavy charged Higgs boson produced inassociation with a top quark and a bottom quark, and decaying into a W boson and a 125 GeVHiggs boson h. The search is performed in final states with one charged lepton, missingtransverse momentum, and jets using proton-proton collision data at SQUARE ROOTs = 13TeV recordedwith the ATLAS detector during Run 2 of the LHC at CERN. This data set correspondsto a total integrated luminosity of 140 fb-1. The search is conducted by examining thereconstructed invariant mass distribution of the Wh candidates for evidence of a localisedexcess in the charged Higgs boson mass range from 250 GeV to 3TeV. No significant excessof data over the expected background is observed and 95% confidence-level upper limitsbetween 2.8 pb and 1.2 fb are placed on the production