Journal
PHYSICAL REVIEW D
Volume 102, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.102.115028
Keywords
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Funding
- National Natural Science Foundation of China (NNSFC) [117050934, 11775012, 11847208, 11875179, 11805161, 11675242, 11821505, 11851303]
- Jiangsu Specially Appointed Professor Program
- Peng-Huan-Wu Theoretical Physics Innovation Center [11847612]
- CAS Center for Excellence in Particle Physics (CCEPP)
- CAS
- Ministry of Science and Technology [2017YFA0402204]
- Natural Science Foundation of Shandong Province [ZR2018QA007]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [NRF-2019R1A2C2003738]
- Korea Research Fellowship Program through the NRF - Ministry of Science and ICT [2019H1D3A1A01070937]
- National Research Foundation of Korea [2019H1D3A1A01070937] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Very recently, the XENON1T Collaboration has reported an intriguing electron recoil excess, which may imply light dark matter. To interpret this anomaly, we propose the atmospheric dark matter (ADM) from the inelastic collision of cosmic rays (CRs) with the atmosphere. Because of the boost effect of high-energy CRs, we show that the light ADM can be fast moving and successfully fit the observed electron recoil spectrum through the ADM-electron scattering process. Meanwhile, our ADM predicts the scattering cross section sigma(e) similar to O(10(-38) - 10(-39) cm(2)) and thus can evade other direct detection constraints. The search for light meson rare decays, such as eta -> pi + (E) over bar (T), would provide a complementary probe of our ADM in the future.
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