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Possible Dark Matter Annihilation Signal in the AMS-02 Antiproton Data
Cui, Ming-Yang; Yuan, Qiang; Tsai, Yue-Lin Sming; Fan, Yi-Zhong
刊名PHYSICAL REVIEW LETTERS
2017
卷号118期号:19页码: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.
语种英语
内容类型期刊论文
源URL[http://libir.pmo.ac.cn/handle/332002/17451]  
专题中国科学院紫金山天文台
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):191101-.
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),191101-.
MLA Cui, Ming-Yang,et al."Possible Dark Matter Annihilation Signal in the AMS-02 Antiproton Data".PHYSICAL REVIEW LETTERS 118.19(2017):191101-.
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