Production and attenuation of cosmic-ray boosted dark matter

doi:10.1088/1475-7516/2022/02/028

CORC > 理论物理研究所 > 中国科学院理论物理研究所 > 理论物理所科研产出 > 理论物理所1978-2010年知识产出

	Production and attenuation of cosmic-ray boosted dark matter
	Xia, Chen ; Xu, Yan-Hao ; Zhou, Yu-Feng
刊名	JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
	2022
期号	2 页码:28
关键词	ENERGY-SPECTRA PROPAGATION NUCLEI
ISSN号	1475-7516
DOI	10.1088/1475-7516/2022/02/028
英文摘要	Light sub-GeV halo dark matter (DM) particles up-scattered by high-energy cosmic-rays (CRs) (referred to as CRDM) can be energetic and become detectable by conventional DM direct detection experiments. We perform a refined analysis on the exclusion bounds of the spin-independent DM-nucleon scattering cross section sigma(chi p) in this approach. For the exclusion lower bounds, we determine the parameter of the effective distance D-eff for CRDM production using spatial-dependent CR fluxes and including the contributions from the major heavy CR nuclear species. We obtain D-eff similar or equal to 9 kpc for CRDM particles with kinetic energy above similar to 1 GeV, which pushes the corresponding exclusion lower bounds down to sigma(chi p) similar to 4x10(-32) cm(2) for DM particle mass at MeV scale and below. For the exclusion upper bounds from Earth attenuation, previous estimations neglecting the nuclear form factor leaded to typical exclusion upper bounds of sigma(chi p) similar to O(10(-28)) cm(2) from the XENON1T data. Using both the analytic and numerical approaches, we show that for CRDM particles, the presence of the nuclear form factor strongly suppresses the effect of Earth attenuation. Consequently, the cross section that can be excluded by the XENON1T data can be a few orders of magnitude higher, which closes the gap in the cross sections excluded by the XENON1T experiment and that by the astrophysical measurements such that for the cosmic microwave background (CMB), galactic gas cloud cooling, and structure formation, etc..
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27831]
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.[Xia, Chen 2.Xu, Yan-Hao 3.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 4.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 5.UCAS, Hangzhou Inst Adv Study, Sch Fundamental Phys & Math Sci, Hangzhou 310024, Peoples R China 6.Int Ctr Theoret Phys Asia Pacific, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Xia, Chen,Xu, Yan-Hao,Zhou, Yu-Feng. Production and attenuation of cosmic-ray boosted dark matter[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2022(2):28.
APA	Xia, Chen,Xu, Yan-Hao,&Zhou, Yu-Feng.(2022).Production and attenuation of cosmic-ray boosted dark matter.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(2),28.
MLA	Xia, Chen,et al."Production and attenuation of cosmic-ray boosted dark matter".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .2(2022):28.