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Novel Direct Detection Constraints on Light Dark Matter.
Torsten Bringmann1, Maxim Pospelov2,3
1Department of Physics, University of Oslo, Box 1048, N-0371 Oslo, Norway.
Physical Review Letters
|May 21, 2019
Summary
Detecting light particle dark matter (DM) is challenging. This study uses cosmic ray collisions to constrain DM-nucleon scattering, limiting cross sections for spin-independent and spin-dependent interactions.
Area of Science:
- Particle physics
- Cosmology
- Astrophysics
Background:
- Direct detection experiments face limitations for low-mass dark matter (DM).
- Existing methods struggle with GeV-scale or lighter dark matter particles.
- A gap exists in understanding dark matter interactions in this mass range.
Purpose of the Study:
- To derive novel constraints on light dark matter interactions.
- To explore an indirect detection method for dark matter.
- To limit the dark matter-nucleon scattering cross section.
Main Methods:
- Modeling dark matter production via cosmic ray collisions.
- Analyzing the energetic component of dark matter generated indirectly.
- Utilizing nuclear recoil data from dark matter and neutrino detectors.
Main Results:
- Established new constraints on the dark matter-nucleon scattering cross section.
- Limited the cross section to below 10^-31 cm^2 for light dark matter.
- Demonstrated sensitivity for both spin-independent and spin-dependent scattering.
Conclusions:
- Indirect constraints provide a viable method for probing light dark matter.
- This approach complements direct detection experiments.
- Further research can refine these constraints for dark matter searches.
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