Direct detection rate of heavy Higgsino-like and Wino-like dark matter

Abstract

A large class of viable dark matter models contain a WIMP candidate that is a component of a new electroweak multiplet whose mass M is large compared to the electroweak scale m W . A generic amplitude-level cancellation in such models yields a severe suppression of the cross section for WIMPnucleon scattering, making it important to assess the impact of formally subleading effects. The power correction of order m W /M to the heavy WIMP limit is computed for electroweak doublet (Higgsinolike) dark matter candidates, and a modern model of nuclear modifications to the free nucleon cross section is evaluated. Corrections to the pure Higgsino limit are determined by a single parameter through first order in the heavy WIMP expansion. Current and projected experimental bounds on this parameter are investigated. The direct detection signal in the pure Higgsino limit remains below neutrino backgrounds for WIMPs in the TeV mass range. Nuclear corrections are applied also to the heavy Wino case, completing the investigation of combined subleading effects from perturbative QCD, 1/M power corrections, and nuclear modifications.

Snowmass2021 Cosmic Frontier Dark Matter Direct Detection to the Neutrino Fog

“…The gray region is excluded by existing direct detection limits [34] and the blue line indicates the neutrino fog level in xenon [20,26]. Regions predicted by other examples of models mentioned in the text [33,[35][36][37][38][39] overlap with those shown and were not included for clarity.…”

“…the dark matter relic density could be produced in the early Universe (e.g. for Higgsino like or Wino like fermions of 0.1 to 10 TeV mass in [33] and [38]). This approach can be motivated by our lack of knowledge of the cosmology during the epoch in which the DM relic abundance in these models is produced (see e.g.…”

The Search for Electroweakinos

“…Figure 2The 90% confidence level exclusion limits from DM direct detection (89) on the SI cross section versus the DM mass (solid and dashed lines) and some representative predictions in SUSY models(90)(91)(92). Theoretical predictions are included for the general MSSM (large red circle) and the Kaluza-Klein universal extradimensional model (blue oval).…”

A Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics

“…The full basis of up to and including dimension-7 operators in the limit Λ m χ ∼ m W can be found in [204]. The case of the heavy dark matter limit is discussed in [201,202,205,206]). The chiral EFT of section II E 2 then gives the hadronization of the three-flavor dark matter EFT and the nuclear response.…”