AMS-02 antiprotons from annihilating or decaying dark matter

被引：34
作者：
Hamaguchi, Koichi [1 ,2 ]
Moroi, Takeo [1 ,2 ]
Nakayama, Kazunori [1 ,2 ]
机构：
[1] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan
[2] Univ Tokyo, Kavli Inst Phys & Math Universe Kavli IPMU, Kashiwa, Chiba 2778583, Japan
来源：
PHYSICS LETTERS B | 2015年 / 747卷
关键词：
LEPTOGENESIS;
D O I：
10.1016/j.physletb.2015.06.041
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Recently the AMS-02 experiment reported an excess of cosmic ray antiprotons over the expected astrophysical background. We interpret the excess as a signal from annihilating or decaying dark matter and find that the observed spectrum is well fitted by adding contributions from the annihilation or decay of dark matter with mass of O(TeV) or larger. Interestingly, Wino dark matter with mass of around 3 TeV, whose thermal relic abundance is consistent with present dark matter abundance, can explain the antiproton excess. We also discuss the implications for the decaying gravitino dark matter with R-parity violation. (C) 2015 The Authors. Published by Elsevier B.V.
引用
收藏
页码：523 / 528
页数：6
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