Solar Neutrino Scattering with Electron into Massive Sterile Neutrino

Abstract

The recent Xenon1T excess can be explained by solar neutrino scattering with electron via a light mediator, either scalar or vector, in addition to many other explanations from the dark sector. Since only the recoil electron is observable, a keV sterile neutrino instead of an active neutrino can appear in the final state. The sterile neutrino allows pseudoscalar mediator to explain the Xenon1T excess which was thought impossible. In addition, nonzero recoil energy lower bound arises from the sterile neutrino mass, which can be used to testify if the sterile neutrino is massive or not. We also briefly discuss the case of a sterile neutrino final state with light $Z^{\prime }$ mediator.

7 pages, 5 figures

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Cited by in corpus (10)

• A Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics
• A Search for Light Fermionic Dark Matter Absorption on Electrons in PandaX-4T
• Implications of first LZ and XENONnT results: A comparative study of neutrino properties and light mediators
• Direct Detection of Spin-Dependent Sub-GeV Dark Matter via Migdal Effect
• New Laboratory Constraints on Neutrinophilic Mediators
• Solar Active-Sterile Neutrino Conversion with Atomic Effects at Dark Matter Direct Detection Experiments
• Dark magnetic dipole property in fermionic absorption by nucleus and electrons
• Probing Light Mediators in the Radiative Emission of Neutrino Pair
• Explaining The XENON1T Excess With Light Goldstini Dark Matter
• Measuring Solar neutrino Fluxes in Direct Detection Experiments in the Presence of Light Mediators