Discovery reach of $CP$ violation and non-standard interactions in low energy neutrino factory

TL;DR

This paper investigates the potential of low energy neutrino factories to discover CP violation and non-standard interactions, optimizing experimental parameters and analyzing the impact of new physics phases on detection capabilities.

Contribution

It provides an optimized setup for CP violation discovery and explores how non-standard interactions affect this reach in low energy neutrino experiments.

Findings

Optimized baseline and energy improve CP violation discovery.

Non-standard interactions can introduce additional CP-violating phases.

Contours show the parameter space where CP violation and NSI effects are detectable.

Abstract

In low energy neutrino factory ($E_{\mu}< 10$GeV) using MIND detector, we have studied the optimization of $CP$ violation discovery reach in the leptonic sector for different baselines and different parent muon energy considering only Standard Model interactions of neutrinos with matter. Considering such optimized experimental set-up of baseline and energy we have addressed the question of how $CP$ violation discovery reach could get affected by the presence of non-standard interactions of neutrinos with matter during the propagation of neutrinos. For off diagonal NSI elements there could be complex phases $\phi_{ij}$ which could also lead to $CP$ violation. In presence of these complex phases we have shown the contours showing the discovery reach of $\delta$ and $\phi_{ij}$. We have also shown the discovery reach of NSIs in the same experimental set-up which is optimized for discovery of $CP$ violation in the leptonic sector.