A combined dark matter study of AMS-02 antiprotons and Fermi-LAT gamma rays

TL;DR

This paper analyzes AMS-02 antiproton data and Fermi-LAT gamma-ray observations to explore potential dark matter signals, reducing uncertainties and examining model consistency.

Contribution

It presents a combined analysis of cosmic-ray and gamma-ray data to identify dark matter signatures and constrain related parameters.

Findings

Possible hint of dark matter with annihilation cross section near thermal value

Compatibility between antiproton signals and gamma-ray excess discussed

Reduced cosmic-ray propagation uncertainties in the analysis

Abstract

Observations of cosmic rays are a sensitive probe of dark matter annihilation in our Galaxy. In this article we present an analysis of the AMS-02 antiproton data, reducing cosmic-ray propagation uncertainties by fitting at the same time dark matter and propagation parameters. The result exhibits a possible hint for dark matter pointing to an annihilation cross section close to the thermal value. We investigate the compatibility of this signal with a dark matter interpretation of the Galactic center excess seen in the Fermi-LAT gamma-ray data and discuss implications for dark matter models.