Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2005-10-03
Phys.Rev. C73 (2006) 035501
Physics
Nuclear Physics
Nuclear Theory
version accepted for publication in Phys. Rev. C
Scientific paper
10.1103/PhysRevC.73.035501
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.
Calarco J. R.
Greene Geoffrey L.
Gudkov Vladimir
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