Combination of e+/e- ratio from AMS-02 and gamma ray line from Fermi-LAT with implication for Dark Matter

TL;DR

This paper combines AMS-02 e+/e- ratio data and Fermi-LAT gamma ray line observations to analyze dark matter contributions, revealing pulsars dominate the spectrum above 130 GeV and constraining dark matter hadron production.

Contribution

It presents a global fit of cosmic ray data incorporating dark matter and pulsar sources, linking gamma ray lines to dark matter and constraining its annihilation channels.

Findings

Pulsars dominate the e+/e- spectrum above 130 GeV.

The gamma ray line supports a dark matter origin.

Constraints on dark matter hadron production are established.

Abstract

The precise AMS-02 data provide definite information for the e+/e- ratio in 100 - 350 GeV region. Assuming that the recent gamma ray line observed by Fermi-LAT experiment is product of dark matter in space and taken as input. We make a global fit for the AMS-02 e+/e- spectrum with both dark matter and pulsar contribution. For this spectrum over 130 GeV, pulsar is the dominant contribution. We also investigate the constrains on hadron production from dark matter annihilation.