Seraina Glaus

TL;DR: In this article, the authors investigated a minimal model with a vector dark matter (VDM) candidate, and computed the cross section for the scattering of the VDM particle with a nucleon.

TL;DR: In this paper, the electroweak corrections to the dark matter-nucleon scattering cross-section in a model with a pseudo Nambu-Goldstone boson as the Dark Matter candidate are revisited.

Abstract: Having so far only indirect evidence for the existence of Dark Matter a plethora of experiments aims at direct detection of Dark Matter through the scattering of Dark Matter particles off atomic nuclei. For the correct interpretation and identification of the underlying nature of the Dark Matter constituents higher-order corrections to the cross section of Dark Matter-nucleon scattering are important, in particular in models where the tree-level cross section is negligibly small. In this work we revisit the electroweak corrections to the dark matter-nucleon scattering cross section in a model with a pseudo Nambu-Goldstone boson as the Dark Matter candidate. Two calculations that already exist in the literature, apply different approaches resulting in different final results for the cross section in some regions of the parameter space leading us to redo the calculation and analyse the two approaches to clarify the situation. We furthermore update the experimental constraints and examine the regions of the parameter space where the cross section is above the neutrino floor but which can only be probed in the far future.

TL;DR: In this article, the authors extended the already existing two-loop calculation of the effective bottom-Yukawa coupling in the MSSM to include the subleading terms related to the trilinear Higgs coupling and contributions induced by the electroweak gauge couplings.