Enhanced Dark Matter Annihilation Rate for Positron and Electron Excesses from Q-Ball Decay

Journal Article · Fri Oct 09 00:00:00 EDT 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.103.151301· OSTI ID:21370728

McDonald, John ^[1]

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1. Cosmology and Astroparticle Physics Group, University of Lancaster, Lancaster LA1 4YB (United Kingdom)

We show that Q-ball decay in Affleck-Dine baryogenesis models can account for dark matter when the annihilation cross section is sufficiently enhanced to explain the positron and electron excesses observed by PAMELA, ATIC, and PPB-BETS. For Affleck-Dine baryogenesis along a d=6 flat direction, the reheating temperature is approximately 30 GeV and the Q-ball decay temperature is in the range of 10-100 MeV. The lightest supersymmetric particles produced by Q-ball decay annihilate down to the observed dark matter density if the cross section is enhanced by a factor approx10{sup 3} relative to the thermal relic cross section.

• OSTI ID: 21370728
• Journal Information: Physical Review Letters, Vol. 103, Issue 15; Other Information: DOI: 10.1103/PhysRevLett.103.151301; (c) 2009 The American Physical Society; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
CROSS SECTIONS
ELECTRONS
GEV RANGE 10-100
MEV RANGE 10-100
NONLUMINOUS MATTER
PARTICLE DECAY
POSITRONS
SPARTICLES
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
DECAY
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
GEV RANGE
INTERACTIONS
LEPTONS
MATTER
MEV RANGE
PARTICLE INTERACTIONS
POSTULATED PARTICLES