26-30 July 2021
Europe/Berlin timezone

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

27 Jul 2021, 16:00


Parallel session talk Neutrino Physics T04: Neutrino Physics


Julia Gehrlein (Brookhaven National Laboratory)


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: $\phi_{e\mu}$ or $\phi_{e\tau}\approx 3\pi/2$ with |$\epsilon_{e\mu}$| or |$\epsilon_{e\tau}$|$\sim$0.2. We then compare the results from long-baseline data to constraints from IceCube and COHERENT.

Email jgehrlein@bnl.gov
Collaboration / Activity Theory
First author Julia Gehrlein

Primary author

Julia Gehrlein (Brookhaven National Laboratory)


Peter Denton (Brookhaven National Lab) Rebekah Pestes (Virginia Tech)

Presentation Materials