Sub-GeV Dark Matter Constraints from Cosmic-Ray Upscattering
Published:Dec 29, 2025 08:10
•1 min read
•ArXiv
Analysis
This paper addresses the challenge of detecting sub-GeV dark matter, which is difficult for traditional direct detection experiments. It proposes a novel mechanism, cosmic-ray upscattering, to boost the DM particles to detectable velocities. The study analyzes various DM-nucleon interaction models and derives constraints using data from existing experiments (LZ, XENON, Borexino). The results extend the reach of direct detection into the sub-GeV regime and highlight the importance of momentum dependence in light-mediator scenarios. This is significant because it provides new ways to search for dark matter in a previously unexplored mass range.
Key Takeaways
- •Proposes cosmic-ray upscattering as a mechanism to detect sub-GeV dark matter.
- •Derives constraints on DM-nucleon interactions using data from LZ, XENON, and Borexino.
- •Extends the reach of direct detection experiments into the sub-GeV mass range.
- •Highlights the importance of momentum dependence in light-mediator scenarios.
Reference
“The paper derives constraints on the coupling parameters using data from the LZ, XENON, and Borexino experiments, covering mediator mass from $10^{-6}$ to $1$ GeV.”