Abstract
Models incorporating flavoured dark matter provide an elegant solution to the dark matter problem, evading the tight LHC and direct direction constraints on simple WIMP models. In Dark Minimal Flavour Violation, a simple framework of flavoured dark matter with new sources of flavour violation, the constraints from thermal freeze-out, direct detection experiments, and flavour physics create well-defined benchmark scenarios for these models. We study the LHC phenomenology of four such scenarios, focusing on final states where a single top quark is produced accompanied by no jets, one jet from the fragmentation of light quarks or a b-tagged jet. For each of these signatures we develop a realistic LHC analysis, and we show that the proposed analyses would increase the parameter space coverage for the four benchmarks, compared to existing flavour-conserving LHC analyses. Finally we show the projected discovery potential of the considered signatures for the full LHC statistics at 14 TeV, and for the High Luminosity LHC.
Highlights
Framework of Dark Minimal Flavour Violation (DMFV) has been put forward
At the LHC, DMFV models provide final state signatures involving the production of scalar mediators (φ), each of which further decays into a quark and a fermionic dark matter particle (χ)
As φ has the same quantum numbers as a supersymmetric squark, the final states for pair production, when both mediators decay to experimentally indistinguishable quark flavours are identical to flavour-conserving SUSY squark production, and limits on the parameter space of the DMFV models can be obtained by a simple recasting of the existing squark searches at the LHC
Summary
We present the simplified models of top-flavoured dark matter introduced in [13, 14] that we will use throughout this analysis. Of Dark Minimal Flavour Violation (DMFV), and move on to briefly review the theoretical ingredients and phenomenological implications of the two models in which DM couples either to right- or left-handed top quarks. The experimental constraints identified in [13, 14] will guide us in deriving four viable benchmark scenarios for our analysis of LHC constraints and single-top signatures
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