The last Complex WIMPs standing

Abstract

We continue the study of weakly interacting massive particles (WIMP) started in [arXiv:2107.09688], 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.

15 pages + appendices, 6 + 6 figures, 1 + 3 tables

References in corpus (18)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• The James Webb Space Telescope
• Cosmology and Astrophysics of Minimal Dark Matter
• DARWIN: towards the ultimate dark matter detector
• Bound-state formation for thermal relic dark matter and unitarity
• Baryon spectrum with $N_f=2+1+1$ twisted mass fermions
• Search for long-lived charged particles in proton-proton collisions at sqrt(s) = 13 TeV
• Search for heavy charged long-lived particles in the ATLAS detector in 36.1 fb${}^{-1}$ of proton-proton collision data at $\sqrt{s}=13$ TeV
• Strongest model-independent bound on the lifetime of Dark Matter
• Constraints on decaying dark matter from the extragalactic gamma-ray background
• Interpreting electroweak precision data including the $W$-mass CDF anomaly
• The Inelastic Frontier: Discovering Dark Matter at High Recoil Energy
• Learning from Radiation at a Very High Energy Lepton Collider
• Dark Matter in $\gamma$ lines: Galactic Center vs dwarf galaxies
• Radiopurity of CaWO${}_4$ Crystals for Direct Dark Matter Search with CRESST and EURECA
• Saha equilibrium for metastable bound states and dark matter freeze-out
• Search for alpha decay of naturally occurring osmium nuclides accompanied by gamma quanta
• NLO electroweak potentials for minimal dark matter and beyond

Cited by in corpus (15)

• The Waning of the WIMP: Endgame?
• Higgs-boson visible and invisible constraints on hidden sectors
• A Search for Dark Matter Lines at the Galactic Center with 14 Years of Fermi Data
• Unraveling the Scotogenic Model at Muon Collider
• Excited bound states and their role in dark matter production
• Toward the ultimate reach of current imaging atmospheric Cherenkov telescopes and their sensitivity to TeV dark matter
• Higgsino Dark Matter Confronts 14 years of Fermi Gamma Ray Data
• Going all the way in the search for WIMP dark matter at the muon collider through precision measurements
• Experimentation at a muon collider
• The Muon Magnetic Moment and Physics Beyond the Standard Model
• Phase transitions, anomalous baryon number violation and electroweak multiplet dark matter
• Recasting and Forecasting Dark Matter Limits Without Raw Data: A Generalized Algorithm for Gamma-Ray Telescopes
• A framework for missing-energy searches with anomalous light vectors
• Long-lived particle phenomenology in one-loop neutrino mass models with dark matter
• Search for gamma-ray spectral lines from dark matter annihilation with the H.E.S.S. Inner Galaxy Survey