Testing New Physics in Oscillations at a Neutrino Factory

TL;DR

This paper evaluates the potential of a neutrino factory to detect new physics in neutrino oscillations, demonstrating its superior sensitivity and ability to resolve parameter degeneracies compared to existing and upcoming experiments.

Contribution

It provides a detailed analysis of a neutrino factory's sensitivity to non-standard interactions and CPT violation, highlighting its advantages over current experiments like DUNE.

Findings

Neutrino factory can improve constraints on new physics scenarios.

It can break degeneracies between standard and non-standard oscillation parameters.

Combines data with DUNE for enhanced sensitivity.

Abstract

A neutrino factory is a potential successor to the upcoming generation of neutrino oscillation experiments and a possible precursor to next-generation muon colliders. Such a machine would provide a well-characterized beam of $\nu_\mu$, $\bar\nu_\mu$, $\nu_e$, and $\bar\nu_e$ neutrinos with comparable statistics. Here we show the sensitivity of a neutrino factory to new oscillation physics scenarios such as vector neutrino non-standard interactions and CPT violation. We study two different potential setups for a neutrino factory with different assumptions on charge identification in the far detector. We find that 10 years of a neutrino factory combined with 10 years of DUNE can improve over most of the current constraints on these scenarios and even over forecasted constraints by 20 years of DUNE. Additionally, we find that a neutrino factory can break degeneracies between the standard oscillation parameters and neutrino non-standard interaction parameters present at DUNE.