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

被引：8

作者：

McDonald, John ^{[1
]}

机构：

[1] Univ Lancaster, Cosmol & Astroparticle Phys Grp, Lancaster LA1 4YB, England

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 15期

关键词：

COSMIC-RAYS; BARYOGENESIS; MSSM; CONDENSATE; ENERGIES;

D O I：

10.1103/PhysRevLett.103.151301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 similar to 10(3) relative to the thermal relic cross section.

引用

页数：4

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