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Setting Limits on Supersymmetry Using Simplified Models

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Detecting Light Dark Matter via Inelastic Cosmic Ray Collisions.

James Alvey¹, Miguel D Campos¹, Malcolm Fairbairn¹

¹Theoretical Particle Physics and Cosmology Group, Physics Department, King's College London, London WC2R 2LS, United Kingdom.

Physical Review Letters

|January 18, 2020

Summary

Direct detection experiments struggle with sub-GeV dark matter. A novel cosmic ray production mechanism offers new sensitivity, potentially dominating over standard relic dark matter signals.

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Area of Science:

Particle Physics
Astrophysics
Cosmology

Background:

Direct detection experiments for sub-GeV dark matter face sensitivity limitations due to low galactic dark matter velocities.
Alternative dark matter flux sources with higher momenta are needed to recover sensitivity.

Purpose of the Study:

To investigate a novel dark matter production mechanism via inelastic cosmic ray collisions.
To estimate the resulting dark matter flux and its impact on direct detection limits.

Main Methods:

Computed dark matter production from mesons generated in inelastic cosmic ray-nucleus collisions (cosmic beam dump).
Estimated potential limits on dark matter properties using data from XENON1T and Large Underground Xenon (LZ) experiments.

Main Results:

The dark matter flux from inelastic cosmic rays can exceed the flux from elastic scattering of relic dark matter.
Derived limits for hadrophilic scalar mediator models are competitive with existing constraints from MiniBooNE for MeV-scale mediators.

Conclusions:

Inelastic cosmic ray collisions provide a viable and potentially dominant source for light dark matter detection.
This mechanism opens new avenues for probing MeV-scale dark matter and hadrophilic mediators.