Probing Energetic Light Dark Matter with Multi-Particle Tracks Signatures at DUNE
Albert De Roeck, Doojin Kim, Zahra Gh. Moghaddam, Jong-Chul Park,, Seodong Shin, Leigh H. Whitehead

TL;DR
This paper evaluates DUNE's potential to detect relativistic light dark matter through multi-particle track signatures, demonstrating significant sensitivity in a non-minimal dark-sector scenario with detailed background analysis.
Contribution
It provides a dedicated sensitivity study for DUNE detectors targeting complex dark matter signatures from a multi-particle dark sector, including inelastic boosted dark matter.
Findings
DUNE can effectively probe relativistic light dark matter signals.
Good particle identification and $dE/dx$ measurements enhance detection capabilities.
Sensitivity limits are established considering detector effects and backgrounds.
Abstract
The search for relativistic scattering signals of cosmogenic light dark matter at terrestrial detectors has received increasing attention as an alternative approach to probe dark-sector physics. Large-volume neutrino experiments are well motivated for searches of dark matter that interacts very weakly with Standard Model particles and/or that exhibits a small incoming flux. We perform a dedicated signal sensitivity study for a detector similar to the one proposed by the DUNE Collaboration for cosmogenic dark-matter signals resulting from a non-minimal multi-particle dark-sector scenario. The liquid argon time projection chamber technology adopted for the DUNE detectors is particularly suited for searching for complicated signatures owing to good measurement resolution and particle identification, as well as measurements to recognize merged tracks. Taking inelastic boosted dark…
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