Speaker
Description
In order to understand the mechanism that creates the observed small neutrino masses, physics beyond the Standard Model may be required. Indeed, many neutrino mass models give rise to non-standard neutrino interactions (NSI), which are therefore theoretically well motivated. Neutrino oscillation experiments are able to probe NSI in neutrino propagation via a model-independent low-energy effective approach, which is valid no matter at which mass scale the new physics occurs. The IceCube neutrino detector and its low-energy extension DeepCore collect large data samples of atmospheric neutrinos whose oscillations carry the imprint of neutrino coherent forward scattering in Earth matter. In the presence of NSI, both flavour-diagonal and flavour-changing neutral-current transitions lead to a generalised matter potential that IceCube is able to constrain. This talk will present the status of NSI searches at IceCube, with a focus on the results of a new analysis using a three-year all-flavour data sample from IceCube DeepCore.
