Abstract
We present cross-section expectations for various processes and collider options, for benchmark scenarios of the Inert Doublet Model, a Two Higgs Doublet Model with a dark matter candidate. The proposed scenarios are consistent with current dark matter constraints, including the most recent bounds from the XENON1T experiment and relic density, as well as with known collider and low-energy limits. These benchmarks, chosen in earlier work for studies at e+e− colliders, exhibit a variety of kinematic features that should be explored at current and future runs of the LHC. We provide cross sections for all relevant production processes at 13 TeV, 27 TeV and 100 TeV proton collider, as well as for a possible 10 TeV and 30 TeV muon collider.
Highlights
The LHC discovery of a scalar particle consistent with the Standard Model (SM)predictions left many questions unanswered, among which is the lack of a dark matter candidate
The Inert Doublet Model (IDM) [1,2,3], a Two Higgs Doublet Model with a discrete Z2 symmetry, is a simple and well-motivated model that leads to a stable dark matter candidate
We found that cross sections are similar for all benchmark points (BPs) and high mass points (HPs), given by 0.13 fb for H A production and 0.31 fb for H + H − production at the 10 TeV collider, respectively; cross sections at 30 TeV are about an order of magnitude lower
Summary
Predictions left many questions unanswered, among which is the lack of a dark matter candidate. While production modes can be similar to standard two Higgs doublet models, the exact Z2 symmetry prevents couplings of the new scalars to fermions and leads to distinct signatures of electroweak gauge bosons and missing (transverse) energy. In [34], a heuristic argument was given why multilepton SUSY searches tend to cut out parameter regions in the IDM that would a priori lead to high event rates Another model one could consider in this respect is the THDMa [57,58,59,60,61,62,63], a two Higgs Doublet model with an additional pseudoscalar that, in the gauge eigenstate, serves as a portal to a dark sector. A more detailed comparison of the consequences of these differences is in the line of future work
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