One-loop analysis of dark matter constraints in a complex scalar extension of the Standard Model

TL;DR

This paper performs a detailed one-loop analysis of a complex scalar extension of the Standard Model, revealing how quantum corrections influence dark matter constraints and parameter space.

Contribution

It provides a comprehensive one-loop calculation including counterterms and quantum corrections, improving the understanding of dark matter phenomenology in this model.

Findings

Quantum corrections significantly alter the allowed parameter space.

One-loop effects impact scalar self-interactions and dark matter phenomenology.

Deviations from tree-level analysis are clearly demonstrated.

Abstract

We investigate the complex singlet extension of the Standard Model, which provides a scalar dark matter candidate. We impose the constraints from the observed relic abundance together with the most stringent limits from direct detection experiments on the model. The counterterms are determined so that the vacuum and mass conditions are consistently satisfied at one-loop order, and the one-loop corrections to scalar self-interactions are fully included in the amplitudes involving the dark matter particle. As a result, the allowed parameter region shows clear deviations from the tree-level analysis, demonstrating the impact of quantum corrections on the phenomenology of dark matter.