QCD Effects on Direct Detection of Wino Dark Matter

Abstract

We complete the calculation of the wino-nucleon scattering cross section up to the next-to-leading order in ${\alpha }_s$. We assume that the other sparticles are decoupled and wino interacts with the Standard Model particles via the weak interaction. As a result, the uncertainties coming from the perturbative QCD are significantly reduced to be smaller than those from the nucleon matrix elements. The resultant scattering cross section is found to be larger than the leading-order one by about 70%, which is well above the neutrino background. In the limit of large wino mass the spin-independent scattering cross section with proton turns out ${\sigma }_{\text{SI}}^p=2.3{}_{-0.3}^{+0.2}{}_{-0.4}^{+0.5}\times 10^{-47}{\text{cm}}^2$ (errors come from perturbative calculation and input parameters, respectively). The computation for a generic SU(2)${}_L$ multiplet dark matter is also presented.

35 pages, 7 figures

References in corpus (7)

• Simply Unnatural Supersymmetry
• Effective Theories for Dark Matter Nucleon Scattering
• Dark Matter and Gauge Coupling Unification in Non-supersymmetric SO(10) Grand Unified Models
• Heavy Dark Matter Annihilation from Effective Field Theory
• Hunting electroweakinos at future hadron colliders and direct detection experiments
• Minimal Asymmetric Dark Matter
• Non-relativistic pair annihilation of nearly mass degenerate neutralinos and charginos III. Computation of the Sommerfeld enhancements

Cited by in corpus (3)

• Asymmetric Dark Matter Models in SO(10)
• Effective Theory for Electroweak Doublet Dark Matter
• Twist-2 operators induced Dark Matter Interactions