Shifts of neutrino oscillation parameters in reactor antineutrino experiments with non-standard interactions

TL;DR

This paper investigates how non-standard interactions affect neutrino oscillation measurements in reactor experiments like JUNO, highlighting the measurable shifts in mass-squared differences and potential constraints on NSI parameters.

Contribution

It introduces a parametrization of NSIs affecting reactor antineutrino oscillations and analyzes their impact on standard neutrino measurements using JUNO as a case study.

Findings

NSIs cause energy-dependent shifts in mass-squared differences

Average NSI parts induce constant shifts in mixing angles

JUNO can constrain NSI parameters effectively

Abstract

We discuss reactor antineutrino oscillations with non-standard interactions (NSIs) at the neutrino production and detection processes. The neutrino oscillation probability is calculated with a parametrization of the NSI parameters by splitting them into the averages and differences of the production and detection processes respectively. The average parts induce constant shifts of the neutrino mixing angles from their true values, and the difference parts can generate the energy (and baseline) dependent corrections to the initial mass-squared differences. We stress that only the shifts of mass-squared differences are measurable in reactor antineutrino experiments. Taking Jiangmen Underground Neutrino Observatory (JUNO) as an example, we analyze how NSIs influence the standard neutrino measurements and to what extent we can constrain the NSI parameters.