Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Enhanced Dark Matter Annihilation Rate for Positron and Electron Excesses from Q-ball Decay
AU - McDonald, John
N1 - 4 pages, version to be published in Physical Review Letters
PY - 2009/10/6
Y1 - 2009/10/6
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=70349916273&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.103.151301
DO - 10.1103/PhysRevLett.103.151301
M3 - Journal article
VL - 103
JO - Physical review letters
JF - Physical review letters
SN - 1079-7114
IS - 15
M1 - 151301
ER -