  Constraints on couplings of several Beyond Standard Model Physics scenarios,
mediated by massive intermediate particles including (1) Extra Z-prime, (2) New
Light Spin-1 Boson, and (3) Charged Higgs Boson, are placed via
neutrino-electron scattering channel to test Standard Model at low
energy-momentum transfer regime. Data on $\bar{\nu}_{e}-e$ and $\nu_{e}-e$
scattering from the TEXONO and LSND Experiments, respectively, are used. Upper
bounds to coupling constants of Flavor Conserving and Flavor Violating New
Light Spin-1 Boson and Charged Higgs Boson with respect to different mediator
masses are determined. The relevant parameter spaces are extended by allowing
light mediators. New lower mass limits for extra Z-prime gauge boson models are
also placed.
