# A First Look at Sky Anosotripies of High-Energy Neutrino Flavours

- Institution: CERN
- Department: Eucapt Conferences
- Speaker: Bernanda Telalovic
- Year: 2023
- Language: English
- Subjects: Earth and environment
- Source: [CERN](https://videos.cern.ch/record/3005144)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

Lorentz invariance is a pillar symmetry of the Standard Model. Yet, it may be violated in proposed extensions, inducing preference for particular directions in the propagation of particles. This type of Lorentz-invariance violation (LIV) is difficult to test. Fortunately, high-energy astrophysical neutrinos, with TeV–PeV energies and cosmological-scale baselines, provide us with a unique opportunity to do so; by looking for the differences in the distribution of arrival directions of neutrinos of different flavours. Using 7.5 years of IceCube High Energy Starting Events, we model a flavour-dependent spherical harmonic expansion of the neutrino flux and ground our predictions in realistic detector simulations. Further, we forecast the near-future reach of current and upcoming neutrino telescopes to constrain and detect these flavour anisotropies. Our work reaffirms the power of high-energy astrophysical neutrinos to probe fundamental physics, and stresses the need do so while accounting for theoretical and experimental nuance..

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## Lectures

1. [A First Look at Sky Anosotripies of High-Energy Neutrino Flavours](https://invisiblenetwork.ai/learn/cern/3005144/27028a3d77d3), 7 min (CERN's player)