Cosmic ray propagation and dark matter in light of the latest AMS-02 data

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	Cosmic ray propagation and dark matter in light of the latest AMS-02 data
	Jin, HB; Wu, YL; Zhou, YF
刊名	JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
	2015
期号	9 页码:49
关键词	dark matter theory dark matter experiments
通讯作者	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.
英文摘要	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.
学科主题	Astronomy & Astrophysics ; Physics
类目[WOS]	Astronomy & Astrophysics ; Physics, Particles & Fields
关键词[WOS]	DIFFUSION-MODEL ; HELIUM SPECTRA ; ENERGY-SPECTRA ; GAMMA-RAYS ; NUCLEI ; ANTIPROTONS ; PARAMETERS ; DENSITY ; GALAXY ; CONVERGENCE
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/20873]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Jin, HB,Wu, YL,Zhou, YF. 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.(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.