Light dark matter in neutrino beams: production modelling and scattering signatures at MiniBooNE, T2K and SHiP

Abstract

We analyze the prospects for detection of light sub-GeV dark matter produced in experiments designed to study the properties of neutrinos, such as MiniBooNE, T2K, SHiP, DUNE etc. We present an improved production model, when dark matter couples to hadronic states via a dark photon or baryonic vector mediator, incorporating bremsstrahlung of the dark vector. In addition to elastic scattering, we also study signatures of light dark matter undergoing deep inelastic or quasi-elastic NC${\pi }^0$-like scattering in the detector producing neutral pions, which for certain experiments may provide the best sensitivity. An extensive appendix provides documentation for a publicly available simulation tool {\tt BdNMC} that can be applied to determine the hidden sector dark matter production and scattering rate at a range of proton fixed target experiments.

18 pages, 11 figures + 19 page appendix documenting the BdNMC simulation code (available at: https://github.com/pgdeniverville/BdNMC/releases); v2: minor corrections and a reference added; v3: minor changes, to appear in Phys. Rev. D

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• Measurement of neutrino and antineutrino neutral-current quasielastic-like interactions on oxygen by detecting nuclear de-excitation $\gamma$-rays