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Browsing by Author "Atkinson, M. C."

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    Heavy neutrino searches through double-bang events at Super-Kamiokande, DUNE, and Hyper-Kamiokande
    Atkinson, M. C.; Coloma, Pilar; Martinez-Soler, Ivan; Rocco, Noemi; Shoemaker, Ian M. (2022-04-28)
    Abstract A variety of new physics scenarios allows for neutrinos to up-scatter into a heavy neutral lepton state. For a range of couplings and neutrino energies, the heavy neutrino may travel some distance before decaying to visible final states. When both the up-scattering and decay occur within the detector volume, these “double bang” events produce distinctive phenomenology with very low background. In this work, we first consider the current sensitivity at Super-Kamiokande via the atmospheric neutrino flux, and find current data may already provide new constraints. We then examine projected future sensitivity at DUNE and Hyper-Kamiokande, including both atmospheric and beam flux contributions to double-bang signals.