Search for charged Higgs bosons decaying into top and bottom quarks at root s=13TeV with the ATLAS detector

Abstract A search for charged Higgs bosons heavier than the top quark and decaying via H tb is presented. The data analysed corresponds to 36.1 fb1 of pp collisions at $$ sqrt{s}=13 $$ s = 13 TeV and was recorded with the ATLAS detector at the LHC in 2015 and 2016. The production of a charged Higgs boson in association with a top quark and a bottom quark, pp tbH , is explored in the mass range from m H = 200 to 2000 GeV using multi-jet final states with one or two electrons or muons. Events are categorised according to the multiplicity of jets and how likely these are to have originated from hadronisation of a bottom quark. Multivariate techniques are used to discriminate between signal and background events. No significant excess above the background-only hypothesis is observed and exclusion limits are derived for the production cross-section times branching ratio of a charged Higgs boson as a function of its mass, which range from 2.9 pb at m H = 200 GeV to 0.070 pb at m H = 2000 GeV. The results are interpreted in two benchmark scenarios of the Minimal Supersymmetric Standard Model.

Aaboud, M., Aad, G., Abbott, B., Abdinov, O., Abeloos, B., Abhayasinghe, D. K., ... Zwalinski, L.

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