Higher Dimensional Effective Operators for Direct Dark Matter Detection

Abstract

We discuss higher dimensional effective operators describing interactions between fermionic dark matter and Standard Model particles. They are typically suppressed compared to the leading order effective operators, which can explain why no conclusive direct dark matter detection has been made so far. The ultraviolet completions of the effective operators, which we systematically study, require new particles. These particles can potentially have masses at the TeV scale and can therefore be phenomenologically interesting for LHC physics. We demonstrate that the lowest order options require Higgs-portal interactions generated by dimension six operators. We list all possible tree-level completions with extra fermions and scalars, and we discuss the LHC phenomenology of a specific example with extra heavy fermion doublets.

27 pages, 11 figures, 3 tables

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• Effective field theory interpretation of searches for dark matter annihilation in the Sun with the IceCube Neutrino Observatory
• Is it possible to discover a dark matter particle with an accelerator?
• Effective Field Theory of Dark Matter from membrane inflationary paradigm
• Including the Z in an Effective Field Theory for dark matter at the LHC
• Unveiling the electrodynamic nature of spacetime collisions
• FIMP Dark Matter in bulk viscous non-standard cosmologies
• Higher order fermion effective polynomial interactions