Closing the window on WIMP Dark Matter

Abstract

We study scenarios where Dark Matter is a weakly interacting particle (WIMP) embedded in an ElectroWeak multiplet. In particular, we consider real SU(2) representations with zero hypercharge, that automatically avoid direct detection constraints from tree-level Z-exchange. We compute for the first time all the calculable thermal masses for scalar and fermionic WIMPs, including Sommerfeld enhancement and bound states formation at leading order in gauge boson exchange and emission. WIMP masses of few hundred TeV are shown to be compatible both with s-wave unitarity of the annihilation cross-section, and perturbativity. We also provide theory uncertainties on the masses for all multiplets, which are shown to be significant for large SU(2) multiplets. We then outline a strategy to probe these scenarios at future experiments. Electroweak 3-plets and 5-plets have masses up to about 16 TeV and can efficiently be probed at a high energy muon collider. We study various experimental signatures, such as single and double gauge boson emission with missing energy, and disappearing tracks, and determine the collider energy and luminosity required to probe the thermal Dark Matter masses. Larger multiplets are out of reach of any realistic future collider, but can be tested in future gamma ray telescopes and possibly in large-exposure liquid Xenon experiments.

Some clarifications and references added, conclusion unchanged. Matching published version on EPJC. 16+12 pages, 16 figures, 4 tables

References in corpus (18)

• A Theory of Dark Matter
• Symmetries and Strings in Field Theory and Gravity
• Cosmology and Astrophysics of Minimal Dark Matter
• Non-perturbative Effect on Thermal Relic Abundance of Dark Matter
• LEP Shines Light on Dark Matter
• Neutralino Dark Matter at 14 and 100 TeV
• Evidence for dark matter in the inner Milky Way
• Bound-state formation for thermal relic dark matter and unitarity
• Baryon spectrum with $N_f=2+1+1$ twisted mass fermions
• Strongest model-independent bound on the lifetime of Dark Matter
• Constraints on decaying dark matter from the extragalactic gamma-ray background
• Heavy Dark Matter Annihilation from Effective Field Theory
• A complete calculation for direct detection of Wino dark matter
• Hunting wino and higgsino dark matter at the muon collider with disappearing tracks
• MOA-II Galactic Microlensing Constraints: The Inner Milky Way has a Low Dark Matter Fraction and a Near Maximal Disk
• Prospects for Annihilating Dark Matter in the inner Galactic halo by the Cherenkov Telescope Array
• Dark Matter in $\gamma$ lines: Galactic Center vs dwarf galaxies
• Thermal Real Scalar Triplet Dark Matter

Cited by in corpus (1)

• SO(10) Grand Unification with Minimal Dark Matter and Color Octet Scalars