Constraining the non-standard interaction parameters in long baseline neutrino experiments

TL;DR

This paper assesses how long baseline neutrino experiments can constrain non-standard neutrino interactions, highlighting sensitivities, interference effects with CP violation, and using GLoBES with LBNO setup.

Contribution

It provides a detailed analysis of the sensitivity of long baseline experiments to NSI parameters and explores the interference with leptonic CP violation effects.

Findings

Experiments can detect NSI couplings down to 0.01-0.1.

Interference with CP angle is significant for certain transitions.

Sensitivity depends on baseline length and detector mass.

Abstract

In this article we investigate the prospects for probing the strength of the possible non-standard neutrino interactions (NSI) in long baseline neutrino oscillation experiments. We find that these experiments are sensitive to NSI couplings down to the level of 0.01-0.1 depending on the oscillation channel and the baseline length, as well as on the detector's fiducial mass. We also investigate the interference of the leptonic CP angle $\delta_{CP}$ with the constraining of the NSI couplings. It is found that the interference is strong in the case of the $\nu_{e}\leftrightarrow\nu_{\mu}$ and $\nu_{e}\leftrightarrow\nu_{\tau}$ transitions but not significant in other transitions. In our numerical analysis we apply the GLoBES software and use the LBNO setup as our benchmark.