Work

Diffuse gamma-ray background and cosmic-ray positrons from annihilating dark matter

Year: 2009

Type: article

Abstract: We study the annihilating dark matter contribution to the extragalactic diffuse gamma-ray background spectrum, motivated by the recent observations of cosmic-ray positron/electron anomalies. The observed diffuse gamma-ray flux provides stringent constraint on dark matter models and we present upper bounds on the annihilation cross section of the dark matter. It is found that for the case of cored dark matter halo profile, the diffuse gamma-rays give more stringent bound compared with gamma-rays from the Galactic center. The Fermi satellite will make the bound stronger.

Source: Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields

DOI: 10.1103/physrevd.80.023517

Authors: Masahiro Kawasaki, Kazunori Kohri, Kazunori Nakayama

Institutions: Kavli Institute for the Physics and Mathematics of the Universe, Institute for Cosmic Ray Research, The University of Tokyo, Lancaster University

Language: English

Topic: Dark Matter and Cosmic Phenomena

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W2007466675

FWCI: 2.886

Cites: 94

Cited by: 20

Related to: 10