Direct detection of dark matter: Precision predictions in a simplified model framework

TL;DR

This paper provides precise theoretical predictions for dark matter direct detection rates by calculating next-to-leading order QCD corrections within simplified models, enhancing the interpretation of experimental results.

Contribution

It introduces the first detailed NLO QCD correction calculations for dark matter-nucleon scattering in simplified models, linking collider and direct detection phenomenology.

Findings

NLO corrections significantly affect exclusion limits in certain models.

Complementary constraints from collider and direct detection experiments are analyzed.

One-loop effects can dominate in cases of tree-level cancellation.

Abstract

We present a calculation of the next-to-leading order QCD corrections for the scattering of Dark Matter particles off nucleons in the framework of simplified models with s- and t-channel mediators. These results are matched to the Wilson coefficients and operators of an effective field theory that is generally used for the presentation of experimental results on spin-independent and spin-dependent direct detection rates. Detailed phenomenological studies illustrate the complementary reach of collider searches for Dark Matter and the direct detection experiments CRESST and XENON. In the case of cancellation effects in the tree-level contributions, one-loop corrections can have a particularly large impact on exclusion limits in the case of combined s+t-channel models.