Constraints on light vector mediators through coherent elastic neutrino nucleus scattering data from COHERENT
M. Cadeddu, N. Cargioli, F. Dordei, C. Giunti, Y. F. Li, E. Picciau, Y.Y. Zhang
Abstract
A bstract We present new constraints on three different models, the so-called universal, B − L and L μ − L τ models, involving a yet to be observed light vector Z ′ mediator, by exploiting the recent observation of coherent elastic neutrino-nucleus scattering (CE ν NS) in argon and cesium-iodide performed by the COHERENT Collaboration. We compare the results obtained from a combination of the above data sets with the limits derived from searches in fixed target, accelerator, solar neutrino and reactor CE ν NS experiments, and with the parameter region that could explain the anomalous magnetic moment of the muon. We show that for the universal and the B − L models, the COHERENT data allow us to put stringent limits in the light vector mediator mass, M Z ′ , and coupling, g Z ′ , parameter space.