# Direct detections of Majorana dark matter in vector portal

## TL;DR

This paper explores the direct detection prospects of Majorana dark matter via vector portals, emphasizing radiative corrections to spin-independent cross sections and their implications for current detection experiments.

## Contribution

It provides the first calculation of radiative corrections to Majorana dark matter scattering cross sections in vector portal models, including one-loop quark and two-loop gluon interactions.

## Key findings

- Current constraints exclude a narrow MDM mass range.
- Radiative corrections can make the cross section detectable.
- Light MDM has a potentially observable spin-independent cross section.

## Abstract

In this paper we investigate the direct detections of Majorana dark matter (MDM) in vector portal. Taking into account that the tree-level scattering cross sections in these models are either dark matter velocity suppressed or spin-dependent, we calculate radiative corrections to the spin-independent cross section in effective field theory approach. Wilson coefficients of effective MDM-quark interactions are calculated at the one-loop level, and the Wilson coefficient of the effective MDM-gluon interaction is derived at the two-loop level. Numerical results show that current constraints can rule out a narrow mass range of MDM when tree-level contributions are considered, and the spin-independent cross section from radiative corrections is reachable by the current direct detection technique for light MDM.