Jonathan M. Butterworth, Martin Habedank, Priscilla Pani, Andrius Vaitkus
SciPost Phys. Core 4, 003 (2021) ·
published 18 February 2021
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Two Higgs doublet models with an additional pseudoscalar particle coupling to
the Standard Model and to a new stable, neutral particle, provide an attractive
and fairly minimal route to solving the problem of Dark Matter. They have been
the subject of several searches at the LHC. We study the impact of existing LHC
measurements on such models, first in the benchmark regions addressed by
searches and then after relaxing some of their assumptions and broadening the
parameter ranges considered. In each case we study how the new parameters
change the potentially visible signatures at the LHC, and identify which of
these signatures should already have had a significant impact on existing
measurements. This allows us to set some first constraints on a number of so
far unstudied scenarios.
