Spectral line

Quantum mechanics

Cosmology

Gauge (firearms)

Statistics

Nuclear physics

Weakly interacting massive particles

Particle physics

Archaeology

Scalar field dark matter

Hypercharge

Neutrino

Standard Model (mathematical formulation)

WIMP

Observable

Dark energy

Collider

Physics

Mathematics

Muon

Parameter space

Geometry

Dark matter

Physics beyond the Standard Model

Electroweak interaction

Multiplet

History

The European Physical Journal C

We continue the study of weakly interacting massive particles (WIMP) started in Bottaro et al. (Eur Phys J C 82:31, 2022), focusing on a single complex electroweak n -plet with non-zero hypercharge added to the Standard Model. The minimal splitting between the Dark Matter and its electroweak neutral partner required to circumvent direct detection constraints allows only multiplets with hypercharge smaller or equal to 1. We compute for the first time all the calculable WIMP masses up to the largest multiplet allowed by perturbative unitarity. For the minimal allowed splitting, most of these multiplets can be fully probed at future large-exposure direct detection experiments, with the notable exception of the doublet with hypercharge 1/2. We show how a future muon collider can fully explore the parameter space of the complex doublet combining missing mass, displaced track and long-lived track searches. In the same spirit, we study how a future muon collider can probe the parameter space of complex WIMPs in regions where the direct detection cross section drops below the neutrino floor. Finally, we comment on how precision observables can provide additional constraints on complex WIMPs.

The last complex WIMPs standing