Alladi Ramakrishnan Hall

Physics with ultra high energy neutrinos

Sushant Raut

KTH Royal Institute of Technology, Stockholm

The IceCube experiment at the South Pole has been constructed to observe ultra high energy neutrinos. These neutrinos, which arrive from
extra-galactic sources, have energies in the TeV-PeV range and beyond. A study of these neutrinos complements the neutrino data collected by solar, atmospheric, reactor and accelerator-based neutrino beams.
This talk discusses the analysis of IceCube data in the context of CP violation
and neutrino decay. For specific source flavour ratios of astrophysical neutrinos, we present our fit to the CP-violating phase. Further, our analysis places constraints on the flavour ratio of astrophysical neutrinos. We also discuss the bounds that can be placed on neutrino decay lifetime.