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题名: Antiprotons from dark matter annihilation through light mediators and a possible excess in AMS-02 (p)over-bar/p data
作者: Huang, XJ ;  Wei, CC ;  Wu, YL ;  Zhang, WH ;  Zhou, YF
刊名: PHYSICAL REVIEW D
出版日期: 2017
卷号: 95, 期号:6, 页码:63021
学科分类: Astronomy & Astrophysics; Physics
DOI: http://dx.doi.org/10.1103/PhysRevD.95.063021
通讯作者: Huang, XJ (reprint author), Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, ZhongGuanCun East Rd 55, Beijing 100190, Peoples R China.
文章类型: Article
英文摘要: We showthat in the scenariowhere darkmatter (DM) particles annihilate through lightmediators, the energy spectra of the final state cosmic-ray particles depend strongly on themediatormass. For final state antiprotons, a spectrum with relatively narrow peak occurs when the mediator mass is comparable to the (p) over tildep production threshold. Of interest, the latestAMS-02 data on the (p) over tildep flux ratio hint at a bumplike excess over the expected background in the energy range similar to 100-450 GeV. We showthat such a lightmediator scenario is favored by the latest AMS-02 data over the scenarios of DM direct annihilation into the standard model particles and that of antiprotons produced from inside supernova remnants (SNRs), and is consistent with the upper limits derived from the Fermi-LAT data on the gamma rays towards the dwarf spheroidal galaxies. The (p) over tildep flux ratio with energy above 450 GeVis predicted to fall with energy quickly, which can be easily distinguished from the other two scenarios as they predict the ratio to be flattening or rising up to the multi-TeV region.
类目[WOS]: Astronomy & Astrophysics ;  Physics, Particles & Fields
关键词[WOS]: COSMIC-RAYS ;  PROPAGATION
项目资助者: National Science Foundation of China (NSFC) [11335012, 11475237] ;  Key Research Program of Frontier Sciences, CAS ;  Strategic Priority Research Program of CAS Grant [XDB23030000]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/22097
Appears in Collections:理论物理所2017年知识产出_期刊论文

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Recommended Citation:
Huang, XJ,Wei, CC,Wu, YL,et al. Antiprotons from dark matter annihilation through light mediators and a possible excess in AMS-02 (p)over-bar/p data[J]. PHYSICAL REVIEW D,2017,95(6):63021.
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