Confronting $\gamma$-rays from singlet fermionic cold dark matter with the H.E.S.S. data

TL;DR

This study thoroughly examines the singlet fermionic cold dark matter model against gamma-ray data from H.E.S.S., finding that most of its parameter space remains viable except near resonance regions.

Contribution

It provides the first comprehensive comparison of 44,000 model samples with H.E.S.S. gamma-ray data, constraining the model's parameter space.

Findings

Most of the model's parameter space is consistent with H.E.S.S. data.

Resonance regions are excluded by gamma-ray constraints.

Indirect detection via gamma rays does not significantly restrict the model outside resonance zones.

Abstract

We explore the whole parameter space of the singlet fermionic cold dark matter model with respect to constraints on, first, the relic density and second, gamma-ray lines up to 10 TeV. We investigate 44000 random sample models which comprehensively scan the parameter space for dark matter mass below 10 TeV, and compare our results with the latest experimental data from H.E.S.S., for the first time. It is showed that, except for the resonance regions, this indirect detection cannot exclude the parameter space of this model.