COHERENT constraints on $Z'$ in 331$\beta$ model

TL;DR

This paper explores constraints on the Z' boson in 331β models using COHERENT neutrino scattering data, finding lower bounds on Z' mass that complement collider and precision measurements.

Contribution

It provides the first analysis of 331β model constraints from coherent neutrino scattering experiments, extending the understanding of Z' boson bounds in these models.

Findings

Z' mass bounds range from 1.4 TeV to 3.1 TeV at 90% CL.

COHERENT data is compatible with 331β model predictions.

Low-energy experiments can complement high-energy collider searches.

Abstract

We investigate coherent-elastic neutrino-nucleus scattering ($CE\nu NS$) in 3-3-1 models for different values of $\beta$ in which $\beta$ is a parameter used to define the charge operator of the 331 models. We show that the number of events predicted by 331$\beta$ model is in agreement with the data given by COHERENT experiment. We evaluate the sensitivity of the mass of Z' boson with 90% confidence level (CL) and find that $m_{Z'}\geq 1.4 $TeV for $\beta=-\sqrt{3}$ with 90% CL. We perform $\chi^2$ fit for liquid Argon, Germanium and NaI detector subsystems, we obtain $m_{Z'} \geq [2,3.1 ]$ TeV with 90\% CL. Our results indicate low-energy high-intensity measurements can provide a valuable probe, complementary to high energy collider searches at LHC and electroweak precision measurements.