WIMP searches with gamma rays in the Fermi era: challenges, methods and results

TL;DR

This paper reviews the use of Fermi-LAT gamma-ray data for WIMP dark matter searches, discussing astrophysical challenges, analysis methods, current constraints, and future prospects in the field.

Contribution

It provides a comprehensive overview of WIMP detection strategies with Fermi-LAT, highlighting recent constraints, methodological approaches, and comparisons with other gamma-ray observatories.

Findings

Robust constraints on WIMP parameter space established.

Identification of astrophysical challenges in gamma-ray detection.

Comparison of Fermi-LAT results with Imaging Air Cherenkov Telescopes.

Abstract

The launch of the gamma-ray telescope Fermi Large Area Telescope (Fermi-LAT) started a pivotal period in indirect detection of dark matter. By outperforming expectations, for the first time a robust and stringent test of the paradigm of weakly interacting massive particles (WIMPs) is within reach. In this paper, we discuss astrophysical targets for WIMP detection and the challenges they present, review the analysis tools which have been employed to tackle these challenges, and summarize the status of constraints on and the claimed detections in the WIMP parameter space. Methods and results will be discussed in comparison to Imaging Air Cherenkov Telescopes. We also provide an outlook on short term and longer term developments.