Uncertainties in Relic Density Calculations in mSUGRA

TL;DR

This paper compares different computational codes for neutralino relic density in mSUGRA, highlighting stable predictions in general but significant discrepancies in key physical regions like focus point and coannihilation zones.

Contribution

It provides a systematic comparison of four public codes, revealing areas where relic density predictions diverge in the mSUGRA model.

Findings

Predictions are stable in most of the parameter space.

Large discrepancies occur in focus point, large tan beta, and coannihilation regions.

Highlights the need for careful code selection in these regions.

Abstract

We compare the relic density of neutralino dark matter within the minimal supergravity model (mSUGRA) using four different public codes for supersymmetric spectra evaluation. While the predictions for the relic density of neutralinos are rather stable in most of the mSUGRA space, it is in the most physically interesting regions that large discrepancies can be observed, in particular the focus point, large tan beta and coannihilation regions.