Neutrinos Polarimetry in Muon Decay

Abstract

We consider massive Dirac electron antineutrino to be observed in the muon decay, $\hat{I}{¼}^{-}\to e^{-}+\bar{\hat{I}}{½}_e+\hat{I}{½}_{\hat{I}}¼$, at rest in the LAB reference frame. A computation of $\bar{\hat{I}}{½}_e$ differential direct spectral shape and angular distribution was performed. This has resulted in transverse component of the neutrino polarization emerging from the nonstandard S, T sector of the Lorentz structure in the Fermi leptonic charged weak interaction. The calculation is based on empirical values of the coupling parameters.