# COHERENT constraints after the COHERENT-2020 quenching factor measurement

## TL;DR

This paper updates constraints on neutrino-nucleus scattering parameters using improved quenching factor measurements from COHERENT, reducing uncertainties and enhancing agreement with the Standard Model.

## Contribution

It provides revised constraints on scattering parameters incorporating the new energy-dependent quenching factor with lower systematic uncertainties.

## Key findings

- Enhanced agreement between data and Standard Model predictions.
- Reduced systematic uncertainties in quenching factor measurements.
- Updated bounds on new physics parameters in neutrino interactions.

## Abstract

Recently an improved quenching factor (QF) measurement for low-energy nuclear recoils in CsI[Na] has been reported by the COHERENT Collaboration. The new energy-dependent QF is characterized by a reduced systematic uncertainty and leads to a better agreement between the experimental COHERENT data and the Standard Model (SM) expectation. In this work, we report updated constraints on parameters that describe the process of coherent elastic neutrino-nucleus scattering within and beyond the SM, and we also present how the new QF affects their interpretation.