Distinctive signals of frustrated dark matter

Linda M. Carpenter; Taylor Murphy; Tim M. P. Tait

doi:10.1007/JHEP09(2022)175

paper

Distinctive signals of frustrated dark matter

arXiv:2205.06824 · doi:10.1007/JHEP09(2022)175

Abstract

We study a renormalizable model of Dirac fermion dark matter (DM) that communicates with the Standard Model (SM) through a pair of mediators -- one scalar, one fermion -- in the representation $(6, 1, \frac{4}{3})$ of the SM gauge group $SU (3)_{c} \times SU (2)_{L} \times U (1)_{Y}$ . While such assignments preclude direct coupling of the dark matter to the Standard Model at tree level, we examine the many effective operators generated at one-loop order when the mediators are heavy, and find that they are often phenomenologically relevant. We reinterpret dijet and pair-produced resonance and $jets + E_{T}^{miss}$ searches at the Large Hadron Collider (LHC) in order to constrain the mediator sector, and we examine an array of DM constraints ranging from the observed relic density $Ω_{χ} h_{Planck}^{2}$ to indirect and direct searches for dark matter. Tree-level annihilation, available for DM masses starting at the TeV scale, is required in order to produce $Ω_{χ} h_{Planck}^{2}$ through freeze-out, but loops -- led by the dimension-five DM magnetic dipole moment -- are nonetheless able to produce signals large enough to be constrained, particularly by the XENON1T experiment. In some benchmarks, we find a fair amount of parameter space left open by experiment and compatible with freeze-out. In other scenarios, however, the open space is quite small, suggesting a need for further model-building and/or non-standard cosmologies.

arXiv comment37 pages, 19 figures. Updated to resemble JHEP Version of Record

Distinctive signals of frustrated dark matter

Abstract

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