Jul 6 – 13, 2022
Bologna, Italy
Europe/Rome timezone

Neutrino upscattering to heavy neutral leptons (HNLs) as an explanation of the MiniBooNE low-energy excess (LEE)

Jul 8, 2022, 9:45 AM
Room 2 (Italia)

Room 2 (Italia)

Parallel Talk Neutrino Physics Neutrino Physics


Jaime Hoefken Zink (Istituto Nazionale di Fisica Nucleare)


The aim of this presentation is to introduce a dark extension of the SM that communicates to it through three portals: neutrino, vector and scalar mixing, by which it could be possible to explain the LEE at MiniBooNE. In the model, Heavy Neutral leptons are produced by upscattering via a dark photon, with masses around 10 MeV – 2 GeV, and subsequently decay into an electron-positron pair and neutrinos. If sufficiently collimated or asymmetric in energy, these events can be detected as a single shower and explain the MiniBooNE LEE. We show how the model can well reconstruct the energy spectrum. We consider two cases: 3 ν + 1 HNL and 3 ν + 2 HNLs.

In-person participation Yes

Primary author

Jaime Hoefken Zink (Istituto Nazionale di Fisica Nucleare)


Daniele Massaro (Alma Mater Studiorum - Università di Bologna / Université Catholique de Louvain)

Presentation materials