Prospects of detecting dark matter through cosmic-ray antihelium with the antiproton constraints
文献类型:期刊论文
作者 | Ding, YC; Li, N; Wei, CC; Wu, YL; Zhou, YF |
刊名 | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS |
出版日期 | 2019 |
期号 | 6页码:4 |
ISSN号 | 1475-7516 |
关键词 | PROPAGATION PROTON COLLISIONS PARTICLES DEUTERON ENERGIES |
DOI | 10.1088/1475-7516/2019/06/004 |
英文摘要 | Cosmic-ray (CR) antihelium is an important observable for dark matter (DM) indirect Searches due to extremely low secondary backgrounds towards low energies. In a given DM model, the predicted CR antihelium flux is expected to be strongly correlated with that of CR antiprotons. In this work, we use the AMS-02 (p) over bar /p data to constrain the DM annihilation cross section, and the ALICE data on the (3)(He) over bar and (T) over bar productions to determine the parameters in the coalescence model for anti-nucleus formation. The hadronic cross sections are estimated using Monte-Carlo event generators including EPOS-LHC and DPMJET. Based on these constraints, we make predictions for the maximal antihelium flux for typical DM annihilation final states, and perform a detailed analysis on the uncertainties due to the DM density profiles and CR propagation models. We find that the results are highly insensitive to both of them, but still significantly depend on the hadronization models in event generators. The prospects of detecting antihelium for the AMS-02 experiment is discussed. We show that with very optimistic assumptions, CR (3)(He) over bar is within the reach of the AMS-02 experiment. The (3)(He) over bar events which can be detected by AMS-02 are likely to have kinetic energy T greater than or similar to 30 GeV, which is consistent with the preliminary AMS-02 search results. The events which can be observed by AMS-02 are likely to arise dominantly from secondary backgrounds rather than DM interactions. |
学科主题 | Astronomy & Astrophysics ; Physics |
语种 | 英语 |
源URL | [http://ir.itp.ac.cn/handle/311006/23414] |
专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
作者单位 | 1.Univ Chinese Acad Sci, Yuquan Rd 19A, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Zhongguancun East Rd 55, Beijing 100190, Peoples R China |
推荐引用方式 GB/T 7714 | Ding, YC,Li, N,Wei, CC,et al. Prospects of detecting dark matter through cosmic-ray antihelium with the antiproton constraints[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2019(6):4. |
APA | Ding, YC,Li, N,Wei, CC,Wu, YL,&Zhou, YF.(2019).Prospects of detecting dark matter through cosmic-ray antihelium with the antiproton constraints.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(6),4. |
MLA | Ding, YC,et al."Prospects of detecting dark matter through cosmic-ray antihelium with the antiproton constraints".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .6(2019):4. |
入库方式: OAI收割
来源:理论物理研究所
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