Probing CP violation with the three years ultra-high energy neutrinos from IceCube

Abstract

The IceCube collaboration has recently announced the discovery of ultra-high energy neutrino events. These neutrinos can be used to probe their production source, as well as leptonic mixing parameters. In this work, we have used the first IceCube data to constrain the leptonic CP violating phase ${\delta }_{cp}$. For this, we have analyzed the data in the form of flux ratios. We find that the fit to ${\delta }_{cp}$ depends on the assumptions made on the production mechanism of these astrophyscial neutrinos. Consequently, we also use this data to impose constraints on the sources of the neutrinos.

6 pages, 7 figures, version accepted for publication in PRD

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• Searching for MeV-Scale Gauge Bosons with IceCube
• The Future of High-Energy Astrophysical Neutrino Flavor Measurements
• Analysis of the 4-year IceCube high-energy starting events
• Multimessenger Astronomy and New Neutrino Physics
• The natural parametrization of cosmic neutrino oscillations
• Sterile Neutrinos and Flavor Ratios in IceCube
• A Model for Pseudo-Dirac Neutrinos: Leptogenesis and Ultra-High Energy Neutrinos
• Leptoquarks: 750 GeV Diphoton Resonance and IceCube Events
• The flavor composition of ultra-high-energy cosmic neutrinos: measurement forecasts for in-ice radio-based EeV neutrino telescopes
• Two-detector flavor sensitivity to ultra-high-energy cosmic neutrinos