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Sensitivity of the MicroBooNE experiment to dark trident interactions

Research output: Working paperPreprint

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  • MicroBooNE Collaboration
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Publication date4/07/2022
<mark>Original language</mark>English

Abstract

This note describes an ongoing search for dark tridents in the MicroBooNE detector. The dark trident interaction is a proposed interaction of sub-GeV dark matter with ordinary matter that would allow an exploration of a hidden dark sector composed of a dark scalar or fermion χ and ′ a dark photon A . This dark matter candidate can be produced at fixed-target neutrino beams such as the NuMI beam and travel uninterrupted to the MicroBooNE liquid argon detector. The ′ interaction with the liquid argon occurs through the process χ + Ar → χ + Ar + A where the dark ′ photon promptly decays inside the detector through: A → e+ + e− . Two event selection strategies are explored, one using boosted decision trees and the other one applying a convolutional neural network. For both analyses a projected sensitivity in MicroBooNE after 2 × 1021 protons on target is presented.