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Transcript
MSc Project:
A combined fit of neutrino models
using astrophysics and oscillation
experiments
Prof. Stefan Söldner-Rembold
Sterile Neutrinos
• Most models that explain small neutrino
masses (see-saw) predict ‘sterile’ neutrinos.
• Sterile means they only interact gravitationally
through their mass, but not through weak
interaction.
• Sterile neutrino masses can be anywhere
between 1 eV and GUT scale.
Short-baseline Anomalies (electron-neutrinos)
Reactor anomaly
Sterile neutrinos?
LSND
νe appearance
30 May 2016
MiniBooNE low
energy excess
S Söldner-Rembold - SBN Programme
3
Sterile neutrinos modify oscillations (“particle physics”)
sterile neutrinos modify CMB (astrophysics/cosmology)
Translating the Parameter Space
Muon-Neutrino Disappearance
Joint project with Astronomers
• Will be supported by Prof. Sarah Bridle (Astro)
• Include electron-neutrino data, including anomalies, for
accelerator/reactor experiments.
• Use same statistical methods for both data set (currently not done)
• Expand to more than just 3+1 flavour, study impact of various
mixing angles
• publish.