ITP OpenIR  > SCI期刊论文
Xia, Chen; Xu, Yan-Hao; Zhou, Yu-Feng
Production and attenuation of cosmic-ray boosted dark matter
AbstractLight 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..
Cooperation Status国内
Subject AreaAstronomy & Astrophysics ; Physics
MOST Discipline CatalogueAstronomy & Astrophysics ; Physics, Particles & Fields
Indexed BySCIE
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Document Type期刊论文
Affiliation1.[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
Recommended Citation
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.
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