Nonstandard interactions and interference effect in low energy {\nu}_{e}e-scattering process

TL;DR

This paper investigates the interference effects of nonstandard neutrino interactions in low-energy electron-neutrino scattering, showing compatibility with experimental data and providing bounds on NSI parameters.

Contribution

It offers a detailed calculation of interference effects in { u}_e e-scattering with NSI, aligning theoretical predictions with experimental results and constraining NSI parameters.

Findings

Interference size predicted by SM is -1.09, measured as -1.01±0.18 in LSND.

NSI contribution is compatible with experimental data.

Bounds on NSI coupling parameters are derived.

Abstract

We calculated the size and sign of interference (I) in elastic {\nu}_{e}e-scattering process in the presence of nonstandard neutrino interactions (NSI). The size of interference predicted by standard model (SM) is -1.09, while that measured in the LSND experiment is -1.01\pm0.18. Using the current bounds on NSI from the literature,we get I= -1.02, which is compatible with experiment . The result indicates that nonstandard current interferes constructively with the charge and neutral currents (CC and NC) of the SM, while the over all -ev sign (distructive) indicates that the dominant contribution is still from the SM, yet we can not ignore the contribution of NSI, as it enhances our knowledge in terms of known physical phenomena. As an offshoot of this analysis, the best bounds on NSI coupling parameters could be chosen.