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PAMELA data and leptonically decaying dark matter
Yin, Peng-fei; Yuan, Qiang; Liu, Jia; Zhang, Juan; Bi, Xiao-jun; Zhu, Shou-hua; Zhang, Xinmin; Yin, PF , Peking Univ, Inst Theoret Phys, Beijing 100871, Peoples R China
2009
发表期刊PHYSICAL REVIEW D
ISSN1550-7998
卷号79期号:2页码:-
摘要Recently PAMELA released their first results on the positron and antiproton ratios. Stimulated by the new data, we studied the cosmic ray propagation models and calculated the secondary positron and antiproton spectra. The low energy positron ratio can be consistent with data in the convection propagation model. Above similar to 10 GeV PAMELA data shows a clear excess on the positron ratio. However, the secondary antiproton is roughly consistent with the data. The positron excess may be evidence of dark matter annihilation or decay. We compare the positron and antiproton spectra with the data by assuming that dark matter annihilates or decays into different final states. The PAMELA data actually excludes quark pairs being the main final states, and disfavors gauge boson final states. Only in the case of leptonic final states can the positron and antiproton spectra be explained simultaneously. We also compare the decaying and annihilating dark matter scenarios which can account for the PAMELA results and find that the decaying dark matter is preferred. Finally, we consider a decaying neutralino dark matter model in the frame of supersymmetry with R-parity violation. The PAMELA data is well fitted with a neutralino mass of 600 similar to 2000 GeV and a lifetime of similar to 10(26) seconds. We also demonstrate that a neutralino with mass around 2 TeV can fit PAMELA and ATIC data simultaneously.
部门归属[Yin, PF; Liu, J; Zhu, SH] Peking Univ, Inst Theoret Phys, Beijing 100871, Peoples R China; [Yin, PF; Liu, J; Zhu, SH] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China; [Yuan, Q; Zhang, J; Bi, XJ] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China; [Bi, XJ] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China; [Bi, XJ; Zhu, SH] Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China; [Zhang, XM] Chinese Acad Sci, Inst High Energy Phys, Div Theoret, Beijing 100049, Peoples R China
关键词R-parity Violation Cosmic-ray Nuclei Solar Minimum Activity Continuum Gamma-rays Energy-spectra Antiproton Spectrum Positron Fraction Propagation Galaxy Model
学科领域Physics
资助者Natural Sciences Foundation of China[10775001, 10635030, 10575111, 10773011]; Chinese Ministry of Education; Chinese Academy of Sciences[KJCX3-SYW-N2] ; Natural Sciences Foundation of China[10775001, 10635030, 10575111, 10773011]; Chinese Ministry of Education; Chinese Academy of Sciences[KJCX3-SYW-N2] ; Natural Sciences Foundation of China[10775001, 10635030, 10575111, 10773011]; Chinese Ministry of Education; Chinese Academy of Sciences[KJCX3-SYW-N2] ; Natural Sciences Foundation of China[10775001, 10635030, 10575111, 10773011]; Chinese Ministry of Education; Chinese Academy of Sciences[KJCX3-SYW-N2]
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收录类别SCI
资助者Natural Sciences Foundation of China[10775001, 10635030, 10575111, 10773011]; Chinese Ministry of Education; Chinese Academy of Sciences[KJCX3-SYW-N2] ; Natural Sciences Foundation of China[10775001, 10635030, 10575111, 10773011]; Chinese Ministry of Education; Chinese Academy of Sciences[KJCX3-SYW-N2] ; Natural Sciences Foundation of China[10775001, 10635030, 10575111, 10773011]; Chinese Ministry of Education; Chinese Academy of Sciences[KJCX3-SYW-N2] ; Natural Sciences Foundation of China[10775001, 10635030, 10575111, 10773011]; Chinese Ministry of Education; Chinese Academy of Sciences[KJCX3-SYW-N2]
WOS记录号WOS:000262979800022
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被引频次:151[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5408
专题理论物理所1978-2010年知识产出
通讯作者Yin, PF , Peking Univ, Inst Theoret Phys, Beijing 100871, Peoples R China
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GB/T 7714
Yin, Peng-fei,Yuan, Qiang,Liu, Jia,et al. PAMELA data and leptonically decaying dark matter[J]. PHYSICAL REVIEW D,2009,79(2):-.
APA Yin, Peng-fei.,Yuan, Qiang.,Liu, Jia.,Zhang, Juan.,Bi, Xiao-jun.,...&Yin, PF , Peking Univ, Inst Theoret Phys, Beijing 100871, Peoples R China.(2009).PAMELA data and leptonically decaying dark matter.PHYSICAL REVIEW D,79(2),-.
MLA Yin, Peng-fei,et al."PAMELA data and leptonically decaying dark matter".PHYSICAL REVIEW D 79.2(2009):-.
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