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题名: Enhancement of dark matter relic density from late time dark matter conversions
作者: Liu, ZP ;  Wu, YL ;  Zhou, YF
刊名: EUROPEAN PHYSICAL JOURNAL C
出版日期: 2011
卷号: 71, 期号:10, 页码:1749
关键词: ELECTRONS
学科分类: Physics
通讯作者: Liu, ZP (reprint author), Chinese Acad Sci, Inst Theoret Phys, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China.
部门归属: [Liu, Ze-Peng; Wu, Yue-Liang; Zhou, Yu-Feng] Chinese Acad Sci, Inst Theoret Phys, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China
英文摘要: We demonstrate that if the dark matter (DM) in the Universe contains multiple components, the possible interactions between the DM components may convert the heavier DM components into lighter ones. It is then possible that the lightest DM component with an annihilation cross section significantly larger than that of the typical weakly interacting massive particle (WIMP) may lead to a relic density in agreement with cosmological observations, due to an enhancement of number density from the DM conversion process at late time after the thermal decoupling. This may provide an alternative source of boost factor relevant to the positron and electron excesses reported by the recent DM indirect search experiments.
资助者: National Basic Research Program of China (973 Program) [2010CB833000]; National Nature Science Foundation of China (NSFC) [10975170, 10821504, 10905084]; Chinese Academy of Science
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000296631800004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14262
Appears in Collections:理论物理所2011年知识产出_期刊论文

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Recommended Citation:
Liu, ZP,Wu, YL,Zhou, YF. Enhancement of dark matter relic density from late time dark matter conversions[J]. EUROPEAN PHYSICAL JOURNAL C,2011,71(10):1749.
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