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

McDonald, John (2009) Enhanced Dark Matter Annihilation Rate for Positron and Electron Excesses from Q-ball Decay. Physical review letters, 103 (15). ISSN 1079-7114

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Abstract

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 10-100 MeV. The LSPs produced by Q-ball decay annihilate down to the observed dark matter density if the cross-section is enhanced by a factor ~ 10^3 relative to the thermal relic cross-section.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Additional Information:
4 pages, version to be published in Physical Review Letters
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
ID Code:
56803
Deposited By:
Deposited On:
16 Aug 2012 10:14
Refereed?:
Yes
Published?:
Published
Last Modified:
22 Jan 2020 01:58