In Quantum Physics, the Spin of an elementary particle is defined to be an intrinsic,
inherent property. The same to the magnetic moment (μ) due to the spin of charged
particles - like Electron (me) and Proton (mp). So the intrinsic spin (S=1/2h-bar) of the
electron entails a magnetic moment because of charge (e). However, a magnetic moment
of a charged particle can also be generated by a circular motion (due to spin) of an
electric charge (e), forming a current. Hence the orbital motion (of charge around a massnucleus)
generates a magnetic moment by Ampère’s law. This concept must lead to an
alternative way calculating the neutrino mass (mν) while looking at the beta decay of a
neutron into fragments: proton, electron, neutrino and corresponding kinetic energies. The
change of neutrons magnetic moment (μn) during the decay process is a fact based on
energy and spin and charge conservation, so should allow to calculate the restmass of
the charge-less neutrino due to a significant change of: μe= -9.2847647043(28)E-24J/T
down to μev= -9.2847592533(28)E-24J/T (while assuming mv=0.30eV to be absorbed and if
(g-2)/2 from QED remains constant). As always the last word has the experiment.