Regular Article - Theoretical Physics
Exploring the low region of two Higgs doublet models at the LHC
Department of Physics, ARC Centre of Excellence for Particle Physics at the Terascale, University of Adelaide, 5005, South Australia, Australia
2 Ottawa-Carleton Institute for Physics, Carleton University, 1125 Colonel By Drive, K1S 5B6, Ottawa, ON, Canada
Accepted: 30 August 2021
Published online: 13 September 2021
Current interpretations of the LHC results on two Higgs doublet models (2HDM) underestimate the sensitivity due to neglecting higher order effects. In this work, we revisit the impact of these effects using the current cross-section times branching ratio limits of the and channels. With a degenerate heavy Higgs mass , we find that the LHC searches gain sensitivity to the small region after including loop corrections, even close to which is not reachable at tree level for all types of 2HDM. For a benchmark point with GeV, can be probed for the Type-I(II) 2HDM model for . When the deviation from is larger, the region for which current searches have exclusion potential becomes larger.
© The Author(s) 2021
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