中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Possible Dark Matter Annihilation Signal in the AMS-02 Antiproton Data

文献类型:期刊论文

作者Cui, Ming-Yang1,2; Yuan, Qiang1,3; Tsai, Yue-Lin Sming2,4; Fan, Yi-Zhong1,3
刊名PHYSICAL REVIEW LETTERS
出版日期2017-05-09
卷号118期号:19页码:5
ISSN号0031-9007
DOI10.1103/PhysRevLett.118.191101
英文摘要

Using the latest AMS-02 cosmic-ray antiproton flux data, we search for a potential dark matter annihilation signal. The background parameters about the propagation, source injection, and solar modulation are not assumed a priori but based on the results inferred from the recent B/C ratio and proton data measurements instead. The possible dark matter signal is incorporated into the model self-consistently under a Bayesian framework. Compared with the astrophysical background-only hypothesis, we find that a dark matter signal is favored. The rest mass of the dark matter particles is similar to 20-80 GeV, and the velocity-averaged hadronic annihilation cross section is about (0.2-5) x 10(-26) cm(3) s(-1), in agreement with that needed to account for the Galactic center GeV excess and/or the weak GeV emission from dwarf spheroidal galaxies Reticulum 2 and Tucana III. Tight constraints on the dark matter annihilation models are also set in a wide mass region.

WOS关键词COSMIC-RAY PROPAGATION ; RADIAL-DISTRIBUTION ; BAYESIAN-ANALYSIS ; DIFFUSION-MODEL ; FERMI-LAT ; GALAXY ; NUCLEI ; CONSTRAINTS ; PARAMETERS ; SPECTRA
WOS研究方向Physics
语种英语
出版者AMER PHYSICAL SOC
WOS记录号WOS:000401239700001
源URL[http://libir.pmo.ac.cn/handle/332002/23090]  
专题中国科学院紫金山天文台
通讯作者Yuan, Qiang; Fan, Yi-Zhong
作者单位1.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China
2.Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China
3.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China
4.Natl Ctr Theoret Sci, Phys Div, Hsinchu 300, Taiwan
推荐引用方式
GB/T 7714
Cui, Ming-Yang,Yuan, Qiang,Tsai, Yue-Lin Sming,et al. Possible Dark Matter Annihilation Signal in the AMS-02 Antiproton Data[J]. PHYSICAL REVIEW LETTERS,2017,118(19):5.
APA Cui, Ming-Yang,Yuan, Qiang,Tsai, Yue-Lin Sming,&Fan, Yi-Zhong.(2017).Possible Dark Matter Annihilation Signal in the AMS-02 Antiproton Data.PHYSICAL REVIEW LETTERS,118(19),5.
MLA Cui, Ming-Yang,et al."Possible Dark Matter Annihilation Signal in the AMS-02 Antiproton Data".PHYSICAL REVIEW LETTERS 118.19(2017):5.

入库方式: OAI收割

来源:紫金山天文台

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