  A method for the general analysis of the sensitivities of neutron beta-decay
experiments to manifestations of possible deviations from the Standard model is
proposed. In a consistent fashion, we take into account all known (radiative
and recoil) corrections which are incorporated within the
  Standard Model to provide a description of angular correlations in neutron
decay in the first order of approximation, or down to the level of $\sim
10^{-5}$. The contributions from models beyond the Standard model are, for low
energy neutron decay, parameterized in terms of vector, axial-vector, scalar
and tensor coupling constants and in terms of parameters related to specific
models. For the present analysis we derive the exact expressions for the
neutron beta decay probability which includes all possible manifestations
models beyond the Standard Model down to level of $\sim 10^{-5}$ without
time-reversal violation. Based on the general expressions for manifestation of
the deviations from the standard model, we present analysis of the
sensitivities for selected neutron decay experiments.
