# Non-standard neutrino interactions and low energy experiments

## TL;DR

This paper develops an Effective Field Theory framework for non-standard neutrino interactions, providing cross section formulas, constraining Wilson coefficients with experimental data, and discussing implications for high-energy operators.

## Contribution

It introduces a comprehensive EFT formulation for NSI including operators up to dimension 7, and connects low-energy experimental constraints to high-energy SMEFT operators.

## Key findings

- Constraints on Wilson coefficients from COHERENT and CHARM data.
- Future experiments can significantly improve bounds on NSI.
- Implications for SMEFT operators above the electroweak scale.

## Abstract

We formulate an Effective Field Theory (EFT) for Non Standard neutrino Interactions (NSI) in elastic scattering with light quarks, leptons, gluons and photons, including all possible operators of dimension 5, 6 and 7. We provide the expressions for the cross sections in coherent neutrino-nucleus scattering and in deep inelastic scattering. Assuming single operator dominance we constrain the respective Wilson coefficient using the measurements by the COHERENT and CHARM collaborations. We also point out the constraining power of future elastic neutrino-nucleus scattering experiments. Finally, we explore the implications of the bounds for SMEFT operators above the electroweak breaking scale.