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arXiv · 2105.09357

Heavy Neutrino searches through Double-Bang Events at Super-Kamiokande, DUNE, and Hyper-Kamiokande

Mack Atkinson·Pilar Coloma·Ivan Martinez-Soler·Noemi Rocco·Ian M. Shoemaker
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Abstract

A variety of new physics scenarios allow 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.

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Mack Atkinson, Pilar Coloma, Ivan Martinez-Soler, Noemi Rocco, Ian M. Shoemaker. 2021-05-19. Heavy Neutrino searches through Double-Bang Events at Super-Kamiokande, DUNE, and Hyper-Kamiokande. https://doi.org/10.1007/jhep04(2022)174

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