  The nu-e-bar electron elastic scattering cross-section was measured with a
CsI(Tl) scintillating crystal detector array with a total mass of 187 kg at the
Kuo-Sheng Nuclear Power Station. The detectors were exposed to a reactor
nu-e-bar flux of 6.4 X 10^{12} cm^{-2}s^{-1} originated from a core with 2.9 GW
thermal power. Using 29882/7369 kg-days of Reactor ON/OFF data, the Standard
Model (SM) of electroweak interaction was probed at the 4-momentum transfer
range of Q^2 ~ 3 X 10^{-6} GeV^2. A cross-section ratio of R_{expt} = [1.08 +-
0.21(stat) +- 0.16(sys)] X R_{SM} was measured. Constraints on the electroweak
parameters (g_V,g_A) were placed, corresponding to a weak mixing angle
measurement of $\s2tw$ = [0.251 +- 0.031(stat) +- 0.024(sys)]. Destructive
interference in the SM nu-e-bar+e processes was verified. Bounds on neutrino
anomalous electromagnetic properties (neutrino magnetic moment and neutrino
charge radius), non-standard neutrino interactions, upparticle physics and
non-commutative physics were placed. We summarize the experimental details and
results, and discuss projected sensitivities with realistic and feasible
hardware upgrades.
