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:
Departments: Faculty of Science and Technology > Physics
ID Code: 56803
Deposited By: ep_importer_pure
Deposited On: 16 Aug 2012 10:14
Refereed?: Yes
Published?: Published
Last Modified: 22 Jan 2020 01:58
URI: https://eprints.lancs.ac.uk/id/eprint/56803

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