| Autor: |
Chen Xia, Yan-Hao Xu, Yu-Feng Zhou |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
Nuclear Physics B, Vol 969, Iss , Pp 115470- (2021) |
| Druh dokumentu: |
article |
| ISSN: |
0550-3213 |
| DOI: |
10.1016/j.nuclphysb.2021.115470 |
| Popis: |
Light halo dark matter (DM) particles upscattered by high-energy cosmic rays (CRs) can be energetic, and become detectable by conventional direct detection experiments. The current constraints derived from space-based direct CR measurements can reach O(10−31) cm2 for a constant DM-nucleon scattering cross section. We show that if the CR energy spectrum follows a power law of type ∼E−3, the derived constraints on the scattering cross section will be highly insensitive to DM particle mass. This suggests that ultrahigh-energy CRs (UHECRs) indirectly measured by ground-based detectors can be used to place constraints on ultralight DM particles, as E−3 is a very good approximation of the UHECR energy spectrum up to energy ∼1020 eV. Using the recent UHECR flux data, we show that the current constraints derived from space-based CR measurements can in principle be extended to ultralight DM particles far below eV scale. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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Full Text from ScienceDirect