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- W2949201752 abstract "We consider a classical Dirac field in flat Minkowski spacetime. We perform a Gordon decomposition of its canonical energy-momentum and spin currents, respectively. Thereby we find for each of these currents a convective and a polarization piece. The polarization pieces can be expressed as exterior covariant derivatives of the two-forms $check M_alpha$ and $M_{alphabeta}=-M_{betaalpha}$, respectively. In analogy to the magnetic moment in electrodynamics, we identify these two-forms as gravitational moments connected with the translation group and the Lorentz group, respectively. We point out the relation between the Gordon decomposition of the energy-momentum current and its Belinfante-Rosenfeld symmetrization. In the non-relativistic limit, the translational gravitational moment of the Dirac field is found to be proportional to the spin covector of the electron." @default.
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- W2949201752 date "1997-06-03" @default.
- W2949201752 modified "2023-09-27" @default.
- W2949201752 title "On the structure of the energy-momentum and the spin currents in Dirac's electron theory" @default.
- W2949201752 hasPublicationYear "1997" @default.
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