Energy-Dependent Neutrino Mixing Parameters at Oscillation Experiments

30 Aug 2021, 17:10
Talk in parallel session Neutrino physics and astrophysics Discussion Panel Neutrinos 1


Vedran Brdar (Fermilab and Northwestern University)


One of the most important achievements in the field of particle physics is the discovery of neutrino oscillations. Despite already awarded Nobel Prize, neutrino oscillation experiments still have a lot to offer, primarily the discovery of CP violation in the lepton sector is anticipated. The parameters entering the expression for neutrino oscillation probabilities are neutrino mixing parameters and mass squared differences. In this talk, we argue that neutrino mixing parameters at production and detection do not necessarily need to be equivalent since such parameters are subject to renormalization group evolution and the process of neutrino production and detection occurs at different energies.In this talk we discuss this in the frame of an UV compete model; in particular we demonstrate that quantum effects can yield relevant observable effects at various neutrino experiments. As an example, we consider high-energy astrophysical neutrinos at IceCube and show that neutron decay production mechanism, that is considered to be strongly disfavored by present data, becomes viable if the significant renormalization group effects are present. We also scrutinize terrestrial experiments and show that the mismatch of neutrino parameters at production and detection can induce large effects at T2K and NOvA.

Primary authors

Vedran Brdar (Fermilab and Northwestern University) Andre de Gouvea (Northwestern University) Kaladi Babu (Oklahoma State University) Pedro Machado (IFT-UAM/CSIC)


Dr. Vedran Brdar (Fermilab and Northwestern U.)

Presentation Materials

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