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 |
DOI | 10.1103/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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