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Clumpiness enhancement of charged cosmic rays from dark matter annihilation with Sommerfeld effect
Yuan Q(袁强); Bi XJ(毕效军); Zhang J(张娟); Yuan, Q; Bi, XJ; Liu, J; Yin, PF; Zhang, J; Zhu, SH
2009
发表期刊JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
期号12页码:11
通讯作者[Yuan, Qiang ; Bi, Xiao-Jun ; Zhang, Juan] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China ; [Bi, Xiao-Jun] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China ; [Liu, Jia ; Yin, Peng-Fei ; Zhu, Shou-Hua] Peking Univ, Inst Theoret Phys, Beijing 100871, Peoples R China ; [Liu, Jia ; Yin, Peng-Fei ; Zhu, Shou-Hua] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China
文章类型Review
摘要Boost factors of dark matter annihilation into antiprotons and electrons/positrons due to the clumpiness of dark matter distribution are studied in detail in this work, taking the Sommerfeld effect into account. It has been thought that the Sommerfeld effect, if exists, will be more remarkable in substructures because they are colder than the host halo, and may result in a larger boost factor. We give a full calculation of the boost factors based on the recent N-body simulations. Three typical cases of Sommerfeld effects, the non-resonant, moderately resonant and strongly resonant cases are considered. We find that for the non-resonant and moderately resonant cases the enhancement effects of substructures due to the Sommerfeld effect are very small (similar to O(1)) because of the saturation behavior of the Sommerfeld effect. For the strongly resonant case the boost factor is typically smaller than similar to O(10). However, it is possible in some very extreme cases that DM distribution is adopted to give the maximal annihilation the boost factor can reach up to similar to 1000. The variances of the boost factors due to different realizations of substructures distribution are also discussed in the work.
关键词dark matter theory cosmic ray theory
学科领域Astronomy & Astrophysics; Physics
研究领域[WOS]Astronomy & Astrophysics ; Physics ; Astronomy & Astrophysics ; Physics
DOI10.1088/1475-7516/2009/12/011
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语种英语
研究领域[WOS]Astronomy & Astrophysics ; Physics ; Astronomy & Astrophysics ; Physics
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000273314300015
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被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240356
专题粒子天体物理中心
实验物理中心
作者单位中国科学院高能物理研究所
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Yuan Q,Bi XJ,Zhang J,et al. Clumpiness enhancement of charged cosmic rays from dark matter annihilation with Sommerfeld effect[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2009(12):11.
APA 袁强.,毕效军.,张娟.,Yuan, Q.,Bi, XJ.,...&Zhu, SH.(2009).Clumpiness enhancement of charged cosmic rays from dark matter annihilation with Sommerfeld effect.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(12),11.
MLA 袁强,et al."Clumpiness enhancement of charged cosmic rays from dark matter annihilation with Sommerfeld effect".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .12(2009):11.
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