PoS - Proceedings of Science
Volume 358 - 36th International Cosmic Ray Conference (ICRC2019) - NU - Neutrino
Quest for new physics using astrophysical neutrino flavour in IceCube
K. Farrag*, C. Arguelles, T. Katori, S. Mandalia  on behalf of the IceCube Collaboration
Full text: pdf
Pre-published on: October 08, 2019
Published on: July 02, 2021
We have detected astrophysical neutrinos in IceCube that can be used to probe astrophysical sources at ultra high scales. Here we report a search for anomalous space time effects using astrophysical neutrino flavor data in IceCube. New effective operators are introduced to drive non-standard neutrino flavor mixing which modify the flavor ratios compared to standard cases. Using the High Energy Starting Events sample (HESE) 7.5-year data for this analysis, we found no evidence of such flavor anomalies. However, we are expecting to set limits from this new approach which goes far beyond any known techniques. Importantly, we achieve the necessary precision to probe new physics using neutrino flavor expected by Planck scale theories.
DOI: https://doi.org/10.22323/1.358.0879
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