Dark matter annihilation and the PAMELA, FERMI, and ATIC anomalies

Journal Article · Tue Jun 15 04:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.123507· OSTI ID:21408042

El Zant, A A; Okada, H ^[1]; Khalil, S ^[1]

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1. Centre for Theoretical Physics, British University in Egypt, El Sherouk City, Postal No, 11837, Post Office Box 43 (Egypt)

If dark matter annihilation accounts for the tantalizing excess of cosmic ray electron/positrons, as reported by the PAMELA, ATIC, HESS, and FERMI observatories, then the implied annihilation cross section must be relatively large. This results, in the context of standard cosmological models, in very small relic dark matter abundances that are incompatible with astrophysical observations. We explore possible resolutions to this apparent conflict in terms of nonstandard cosmological scenarios; plausibly allowing for large cross sections, while maintaining relic abundances in accord with current observations.

• OSTI ID: 21408042
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 12 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
79 ASTRONOMY AND ASTROPHYSICS
ANNIHILATION
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
ASTROPHYSICS
COSMIC ELECTRONS
COSMIC POSITRONS
COSMIC RADIATION
COSMOLOGICAL MODELS
CROSS SECTIONS
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
INTERACTIONS
IONIZING RADIATIONS
LEPTONS
MATHEMATICAL MODELS
MATTER
NONLUMINOUS MATTER
PARTICLE INTERACTIONS
PHYSICS
POSITRONS
RADIATIONS
RESOLUTION
SECONDARY COSMIC RADIATION