Can dark matter annihilations explain the AMS-02 positron data?

TL;DR

This paper demonstrates that conventional isotropic dark matter models cannot simultaneously explain the AMS-02 positron excess and remain consistent with Fermi-LAT gamma-ray data.

Contribution

It provides a critical analysis showing the limitations of standard dark matter models in explaining cosmic positron observations.

Findings

Conventional isotropic dark matter models fail to explain the positron excess.

Such models are inconsistent with Fermi-LAT diffuse gamma-ray background data.

Abstract

We show that no dark matter model with the conventional isotropic density distribution can provide a satisfactory explanation of the cosmic positron excess, while being consistent with Fermi-LAT data on diffuse gamma-ray background.