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题名: Limits on dark matter from AMS-02 antiproton and positron fraction data
作者: Lu, Bo-Qiang1, 2; Zong, Hong-Shi1
刊名: PHYSICAL REVIEW D
出版日期: 2016-05-18
卷号: 93, 期号:10
DOI: 10.1103/PhysRevD.93.103517
文章类型: Article
英文摘要: Herein we derive limits on dark matter annihilation cross section and lifetime using measurements of the AMS-02 antiproton ratio and positron fraction data. In deriving the limits, we consider the scenario of secondary particles accelerated in supernova remnants (SNRs), which has been argued to be able to reasonably account for the AMS-02 high-energy positron/antiproton fraction/ratio data. We parametrize the contribution of secondary particles accelerated in SNRs and then fit the observational data within the conventional cosmic ray propagation model by adopting the GALPROP code. We use the likelihood ratio test to determine the 95% confidence level upper limits of possible dark matter (DM) contribution to the antiproton/positron fractions measured by AMS-02. Under the assumption taken in this work, we find that our limits are stronger than that set by the Fermi-LAT gamma ray Pass 8 data observation on the dwarf spheroidal satellite galaxies. We show that the solar modulation (cosmic ray propagation) parameters can play a non-negligible role in modifying the constraints on dark matter annihilation cross section and lifetime for m(chi) < 100 GeV (m(chi) > 100 GeV), where m(chi) is the rest mass of dark matter particles. We also find that constrains on DM parameters from AMS-02 data would become more stringent when the solar modulation is weak. Using these results, we also put limits on the effective field theory of dark matter.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics ; Physics, Particles & Fields
研究领域[WOS]: Astronomy & Astrophysics ; Physics
关键词[WOS]: GALACTIC COSMIC-RAYS ; SUPERBUBBLE ORIGIN ; SOLAR MODULATION ; TIME-DELAY ; ACCELERATION ; EXCESS ; ELECTRONS ; ENERGIES ; MASSES ; GALAXY
收录类别: SCI
项目资助者: National Natural Science Foundation of China(11275097 ; 11475085 ; 11535005)
语种: 英语
WOS记录号: WOS:000376258700002
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内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16219
Appears in Collections:暗物质和空间天文实验室_期刊论文

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作者单位: 1.Nanjing Univ, Sch Phys, Nanjing 210093, Jiangsu, Peoples R China
2.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China
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