Knowledge Management System of Institute of Theoretical Physics, CAS
Jin, HB; Wu, YL ; Zhou, YF; Jin, HB (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Zhong Guan Cun East St 55,POB 2735, Beijing 100190, Peoples R China.
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| Cosmic ray propagation and dark matter in light of the latest AMS-02 data | |
| Source Publication | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
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| Language | 英语 |
| Keyword | Dark Matter Theory Dark Matter Experiments |
| Abstract | The AMS-02 experiment is measuring the high energy cosmic rays with unprecedented accuracy. We explore the possibility of determining the cosmic-ray propagation models using the AMS-02 data alone. A global Bayesian analysis of the constraints on the cosmic-ray propagation models from the preliminary AMS-02 data on the Boron to Carbon nuclei flux ratio and proton flux is performed, with the assumption that the primary nucleon source is a broken power law in rigidity. The ratio of the diffusion coefficient D-0 to the diffusive halo height Z(h) is determined with high accuracy D-0/Z(h) similar or equal to 2.00 +/- 0.07 cm(2)s(-1) kpc(-1), and the value of the halo width is found to be Z(h) similar or equal to 3.3 kpc with uncertainty less than 50%. As a consequence, the typical uncertainties in the positron fraction predicted from dark matter (DM) annihilation is reduced to a factor of two, and that in the antiproton flux is about an order of magnitude. Both of them are significantly smaller than that from the analyses prior to AMS-02. Taking into account the uncertainties and correlations in the propagation parameters, we derive conservative upper limits on the cross sections for DM annihilating into various standard model final states from the current PAMELA antiproton data. We also investigate the reconstruction capability of the future high precision AMS-02 antiproton data on the DM properties. The results show that for DM particles lighter than similar to 100 GeV and with typical thermal annihilation cross section, the cross section can be well reconstructed with uncertainties about a factor of two for the AMS-02 three-year data taking. |
| 2015 | |
| Issue | 9Pages:49 |
| Subject Area | Astronomy & Astrophysics ; Physics |
| DOI | http://dx.doi.org/10.1088/1475-7516/2015/09/049 |
| Indexed By | SCI |
| Funding Organization | National Basic Research Program of China (973 Program) [2010CB833000] ; National Basic Research Program of China (973 Program) [2010CB833000] ; National Basic Research Program of China (973 Program) [2010CB833000] ; National Basic Research Program of China (973 Program) [2010CB833000] ; National Nature Science Foundation of China (NSFC) [10821504, 10905084, 11335012, 11475237] ; National Nature Science Foundation of China (NSFC) [10821504, 10905084, 11335012, 11475237] ; National Nature Science Foundation of China (NSFC) [10821504, 10905084, 11335012, 11475237] ; National Nature Science Foundation of China (NSFC) [10821504, 10905084, 11335012, 11475237] |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.itp.ac.cn/handle/311006/20873 |
| Collection | SCI期刊论文 计算平台成果 |
| Corresponding Author | Jin, HB (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Zhong Guan Cun East St 55,POB 2735, Beijing 100190, Peoples R China. |
| Recommended Citation GB/T 7714 | Jin, HB,Wu, YL,Zhou, YF,et al. Cosmic ray propagation and dark matter in light of the latest AMS-02 data[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2015(9):49. |
| APA | Jin, HB,Wu, YL,Zhou, YF,&Jin, HB .(2015).Cosmic ray propagation and dark matter in light of the latest AMS-02 data.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(9),49. |
| MLA | Jin, HB,et al."Cosmic ray propagation and dark matter in light of the latest AMS-02 data".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .9(2015):49. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Cosmic ray propagati（1113KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | Application Full Text | |
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