Inelastic Scattering of Dark Matter with Heavy Cosmic Rays

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外文摘要：We investigate the impact of inelastic collisions between dark matter(DM)and heavy cosmic ray(CR)nuclei on CR propagation.We approximate the fragmentation cross-sections for DM-CR collisions using collider-measured proton-nuclei scattering cross-sections,allowing us to assess how these collisions affect the spectra of CR boron and carbon.We derive new CR spectra from DM-CR collisions by incorporating their cross-sections into the source terms and solving the diffusion equation for the complete network of reactions involved in generating secondary species.In a specific example with a coupling strength of bx=0.1 and a DM mass of mx=0.1 GeV,considering a simplified scenario where DM interacts exclusively with oxygen,a notable modification in the boron-to-carbon spectrum due to the DM-CR interaction is observed.Particularly,the peak within the spectrum,spanning from 0.1 to 10 GeV,experiences an enhancement of approximately 1.5 times.However,in a more realistic scenario where DM particles interact with all CRs,this peak can be amplified to twice its original value.Utilizing the latest data from AMS-02 and DAMPE on the boron-to-carbon ratio,we estimate a 95％upper limit for the effective inelastic cross-section of DM-proton as a function of DM mass.Our findings reveal that at mx(≈)2 MeV,the effective inelastic cross-section between DM and protons must be less than O(10-32)cm2.

外文关键词：

elementary particlesnuclear reactionsnucleosynthesisabundancesscatteringastroparticle physics(cosmology:)dark matter

作者：

Keyu Lu、Yue-Lin Sming Tsai、Qiang Yuan、Le Zhang

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作者单位：

School of Physics and Astronomy,Sun Yat-sen University,Zhuhai 519082,China

Key Laboratory of Dark Matter and Space Astronomy,Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210023,China

School of Astronomy and Space Science,University of Science and Technology of China,Hefei 230026,China

CSST Science Center for the Guangdong-Hong Kong-Macau Greater Bay Area,SYSU,Zhuhai 519082,China

Peng Cheng Laboratory,Shenzhen 518000,China

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基金：

Sujie Lin for discussing the GALPROP code.This work is supported by the National Key Research and Development Program of ChinaSujie Lin for discussing the GALPROP code.This work is supported by the National Key Research and Development Program of ChinaSujie Lin for discussing the GALPROP code.This work is supported by the National Key Research and Development Program of ChinaSujie Lin for discussing the GALPROP code.This work is supported by the National Key Research and Development Program of ChinaMinistry of Science and Technology of ChinaMinistry of Science and Technology of ChinaMinistry of Science and Technology of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaCAS Project for Young Scientists in Basic ResearchCAS Project for Young Scientists in Basic ResearchChina Manned Space ProjectChina Manned Space ProjectChina Manned Space ProjectChina Manned Space ProjectMajor Key Project of PCL111 project

项目编号：

2022YFF05033042020YFC22016002018YFA04045042018YFA04046012020SKA01104022020SKA01104012020SKA0110100118906911220538812220101003YSBR-061YSBR-092CMS-CSST-2021A02A03B01B20019

出版年：

2024

DOI：

10.1088/1674-4527/ad3c6f

天文和天体物理学研究

中国科学院国家天文台

天文和天体物理学研究

CSTPCD

影响因子：0.406

ISSN：1674-4527

年,卷(期)：2024.24(6)