The potential for probing extra neutral gauge boson mediators ($Z^{\prime }$) from low-energy measurements is comprehensively explored. Our study mainly focuses on $Z^{\prime }$ mediators present in string-inspired $E_6$ models and left-right symmetry. We estimate the sensitivities of coherent-elastic neutrino-nucleus scattering ($\mathrm{CE}\nu \mathrm{NS}$) 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.

• Received 12 February 2020
• Accepted 9 April 2020

DOI:https://doi.org/10.1103/PhysRevD.101.073005

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Published by the American Physical Society