Revisiting simplified dark matter models in terms of AMS-02 and Fermi-LAT

TL;DR

This paper analyzes simplified dark matter models using cosmic ray data from AMS-02 and Fermi-LAT, finding consistency with observations and constraining dark matter mass and annihilation cross sections.

Contribution

It provides a comprehensive analysis of simplified dark matter models in light of cosmic ray data, including constraints on mass and annihilation cross sections.

Findings

AMS-02 data favor dark matter masses between 30 GeV and 5 TeV.

Effective annihilation cross sections are constrained to 4x10^{-27} to 4x10^{-24} cm^3/s.

Cross sections below 2x10^{-26} cm^3/s evade Fermi-LAT dwarf galaxy constraints.

Abstract

We perform an analysis of the simplified dark matter models in the light of cosmic ray observables by AMS-02 and Fermi-LAT. We assume fermion, scalar or vector dark matter particle with a leptophobic spin-0 mediator that couples only to Standard Model quarks and dark matter via scalar and/or pseudo-scalar bilinear. The propagation and injection parameters of cosmic rays are determined by the observed fluxes of nuclei from AMS-02. We find that the AMS-02 observations are consistent with the dark matter framework within the uncertainties. The AMS-02 antiproton data prefer 30 (50) GeV - 5 TeV dark matter mass and require an effective annihilation cross section in the region of 4x10^{-27} (7x10^{-27}) - 4x10^{-24} cm^3/s for the simplified fermion (scalar and vector) dark matter models. The cross sections below 2x10^{-26} cm^3/s can evade the constraint from Fermi-LAT dwarf galaxies for about 100 GeV dark matter mass.