Abstract
The influence of the second class currents (SCC) on angular correlations, charge asymmetries and electron polarizations in beta decays of mirror nuclei are investigated in the Kubodera-Delorme-Rho (KDR) model. It is shown that these quantities depend in very different ways on the KDR-model parameters ζ and λ, which can be used for their experimental determination. In the middle of the β-spectrum the SCC effects dominate over those due to the neutrino rest mass, but the SCC can not modify the specific tail of the correlation coefficient A ev in the case of a non-zero neutrino mass. More rigorously, we can state that in the case of m v ≠ 0, and independently of the presence of SCC, the correlation coefficient A e v tends to zero ( A e v GT →0) at the upper end of the β-spectrum. This is contrary to the standard result (which assumes m v = 0), according to which this coefficient tends to a non-zero constant (A ev GT = − 1 3 β e →− 1 3 ) .
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