The 28th International Workshop on Weak Interactions and Neutrinos (WIN2021)

CP-Violating Neutrino Non-Standard Interactions in Long-Baseline-Accelerator Data

Not scheduled

20m

Asynchronous Talk Neutrino Physics Neutrino Physics Session 2

Speaker

Julia Gehrlein (Brookhaven National Laboratory)

Description

Neutrino oscillations in matter provide a unique probe of new physics. Leveraging the advent of neutrino appearance data from NOvA and T2K in recent years, we investigate the presence of CP-violating neutrino non-standard interactions in the oscillation data. We first show how to very simply approximate the expected NSI parameters to resolve differences between two long-baseline appearance experiments analytically. Then, by combining recent NOvA and T2K data, we find a tantalizing hint of CP-violating NSI preferring a new complex phase that is close to maximal: 𝜙𝑒𝜇 or 𝜙𝑒𝜏≈3𝜋/2 with |𝜖_𝑒𝜇| or |𝜖_𝑒𝜏|∼0.2. We then compare the results from long-baseline data to constraints from IceCube and COHERENT.

Presentation materials

CP-Violating Neutrino Non-Standard Interactions in Long-Baseline-Accelerator Data

win2021_gehrlein.pdf