# NuFact 2022: The 23rd International Workshop on Neutrinos from Accelerators

July 30, 2022 to August 6, 2022
Cliff Lodge
US/Mountain timezone

## Coherent neutrino scattering and the quenching factor measurement

Aug 4, 2022, 4:10 PM
25m
Magpie B

### Magpie B

Talk WG5: Beyond PMNS

### Speaker

Jiajun Liao (Sun Yat-sen University)

### Description

The recent evidence for coherent elastic neutrino-nucleus scattering (CE\nuνNS) in the NCC-1701 germanium detector using antineutrinos from the Dresden-II nuclear reactor is in good agreement with standard model expectations. However, we show that a 2σ improvement in the fit to the data can be achieved if the quenching factor is described by a modified Lindhard model with a negative value of $q$, which is also consistent with the direct quenching factor measurements. We also place constraints on the parameter space of a light vector or scalar mediator that couples to neutrinos and quarks, and on a neutrino magnetic moment. We demonstrate that the constraints are quite sensitive to the quenching factor at low recoil energies by comparing constraints for the standard Lindhard model with those by marginalizing over the two parameters of the modified Lindhard model.

Attendance type Virtual presentation

### Primary authors

Danny Marfatia (University of Hawaii) Jiajun Liao (Sun Yat-sen University)