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Blazar Constraints on Neutrino-Dark Matter Scattering
James M Cline1, Shan Gao1, Fangyi Guo1
1McGill University, Department of Physics, 3600 University Street, Montréal, Quebec H3A2T8 Canada.
Physical Review Letters
|March 17, 2023
Summary
High-energy neutrinos detected from a blazar provide new constraints on dark matter (DM) interactions. This study limits the neutrino-dark matter scattering cross-section, impacting our understanding of particle physics.
Area of Science:
- Astrophysics
- Particle Physics
- Cosmology
Background:
- Neutrino and gamma-ray emissions observed from the blazar TXS 0506+056 by the IceCube telescope.
- Neutrinos traversed a dense dark matter (DM) spike near the central black hole.
Purpose of the Study:
- To establish new upper bounds on the neutrino-DM scattering cross-section.
- To analyze the implications of the observed neutrino event on DM properties.
Main Methods:
- Utilizing IceCube neutrino detection data.
- Modeling neutrino propagation through a DM spike.
- Calculating constraints on the neutrino-DM scattering cross-section.
Main Results:
- The observation implies new upper bounds on the neutrino-DM scattering cross-section as a function of DM mass.
- Constraints are stronger than existing ones for DM masses where the cross-section rises linearly with energy.
- Competitive bounds are also possible for constant cross-sections, depending on DM spike characteristics.
Conclusions:
- The detection of neutrinos from TXS 0506+056 offers a novel method to probe dark matter properties.
- This study enhances our understanding of particle interactions in extreme astrophysical environments.
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