Studies of Quantum Mechanical Coherency Effects in Neutrino-Nucleus Elastic Scattering

Neutrino-Nucleus Elastic Scattering ($\nu A_{el}$) is a well-defined process in the Standard Model of particle physics. It provides a unique laboratory to study the quantum mechanical coherency effects in electroweak interactions. We present an analytical formulation \footnote{S. Kerman et al., \textbf{Phy. Rev. D} 93, 113006 (2016)} to quantify the coherency effects ($\alpha$), relate this to nuclear form factors and experimental cross-section ratios, and characterize how its energy dependence leads to complementary among measurements at various neutrino sources with different targets. The latest results and prospects of observing $\nu A_{el}$ at the Kuo-Sheng Reactor Neutrino Laboratory with germanium detectors with $\mathcal{O}$(100 eV) threshold \footnote{A. K. Soma et al., \textbf{Nucl. Instrum. Meth. A} 67, 836 (2016)} will also be presented.