Effective couplings approach to neutralino dark matter relic density

TL;DR

This paper investigates electroweak loop corrections to neutralino dark matter relic density using an effective coupling approach, comparing it to full one-loop calculations to evaluate its accuracy and applicability.

Contribution

It introduces an effective coupling method for calculating electroweak corrections to neutralino relic density and assesses its validity against full one-loop computations.

Findings

Effective couplings capture dominant one-loop corrections.

The approach provides a good approximation in certain parameter regions.

Comparison shows where the effective method is valid or limited.

Abstract

In this work, we analyze the electroweak loop corrections to the Neutralino dark matter relic density in the framework of effective coupling. In the first part, we comment on the generic features of the corrections and quantitative changes to the predicted relic density. We analyze the correlation between the characteristics of effective couplings to the nature of neutralino. Effective couplings, however, absorb only the most dominant one loop corrections and are not an exact calculation. In the second part, we assess the validity of effective couplings by comparing them to the full one loop calculations in various regions of parameter space.