# A COHERENT Search Strategy for Beyond Standard Model Neutrino Interactions

## TL;DR

This paper evaluates the sensitivity of the COHERENT experiment at SNS to neutrino non-standard interactions, showing potential for improved constraints and probing new physics if spectral data is available.

## Contribution

It introduces a coherent search strategy that enhances sensitivity to NSI and explores the potential to constrain new gauge bosons with spectral analysis.

## Key findings

- Event counting improves NSI constraints for electron and muon flavors.
- Spectral analysis can probe the mass scale of NSI, especially for gauge bosons below 1 GeV.
- Constraints on $Z'$ models are improved with spectral data.

## Abstract

We study the sensitivity of the stopped pion source of neutrinos at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory to neutrino non-standard interactions (NSI). In particular, we find that simple event counting above threshold can improve constraints on NSI for electron- and muon- flavored NSI, with the strongest constraints arising for flavor-diagonal NSI coupling to $\mu$ neutrinos. However, if the detector resolution is sufficient to all for even a coarse spectral study of events, COHERENT will also be sensitive to the mass scale of NSI. We demonstrate that this can yield new limits on $Z'$ completions of NSI if the gauge boson mass is $\lesssim 1$ GeV.