Probing new neutral gauge bosons with CEνNS and neutrino-electron scattering

The potential for probing extra neutral gauge boson mediators (Z′) from low-energy measurements is comprehensively explored. Our study mainly focuses on Z′ mediators present in string-inspired E6 models and left-right symmetry. We estimate the sensitivities of coherent-elastic neutrino-nucleus scattering (CEνNS) and neutrino-electron scattering experiments. Our results indicate that such low-energy high-intensity measurements can provide a valuable probe, complementary to high-energy collider searches and electroweak precision measurements