Probing dark matter annihilation in the Galaxy with antiprotons and gamma rays

Journal Article · Sun Oct 01 04:00:00 EDT 2017 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2017/10/053· OSTI ID:22667612

Cuoco, Alessandro; Heisig, Jan; Korsmeier, Michael; Krämer, Michael ^[1]

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1. Institute for Theoretical Particle Physics and Cosmology, RWTH Aachen University, 52056 Aachen (Germany)

A possible hint of dark matter annihilation has been found in Cuoco, Korsmeier and Krämer (2017) from an analysis of recent cosmic-ray antiproton data from AMS-02 and taking into account cosmic-ray propagation uncertainties by fitting at the same time dark matter and propagation parameters. Here, we extend this analysis to a wider class of annihilation channels. We find consistent hints of a dark matter signal with an annihilation cross-section close to the thermal value and with masses in range between 40 and 130 GeV depending on the annihilation channel. Furthermore, we investigate in how far the possible signal is compatible with the Galactic center gamma-ray excess and recent observation of dwarf satellite galaxies by performing a joint global fit including uncertainties in the dark matter density profile. As an example, we interpret our results in the framework of the Higgs portal model.

• OSTI ID: 22667612
• Journal Information: Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 10 Vol. 2017; ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ANNIHILATION
ANTIPROTONS
COSMIC RADIATION
COSMIC RAY PROPAGATION
CROSS SECTIONS
DENSITY
GALAXIES
GAMMA RADIATION
GEV RANGE
HIGGS BOSONS
HIGGS MODEL
MASS
NONLUMINOUS MATTER
SATELLITES