31 May 2023 to 2 June 2023
CERN
Europe/Zurich timezone

Dark Sectors and MiniBooNE Low Energy Excess

31 May 2023, 16:29
5m
500/1-001 - Main Auditorium (CERN)

500/1-001 - Main Auditorium

CERN

400
Show room on map
particle astrophysics (including cosmic rays, neutrinos, nuclear astrophysics) Particle Astrophysics

Speaker

Jaime Hoefken Zink

Description

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 Low Energy Excess (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.

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Authors

Asli Abdullahi Mr Daniele Massaro (Alma Mater Studiorum - Università di Bologna / Université Catholique de Louvain) Jaime Hoefken Zink Matheus Hostert (University of Minnesota / Perimeter Institute) Silvia Pascoli (Universita e INFN, Bologna (IT))

Presentation materials