Abstract:
It is shown that there exist two equivalent Poincaré-invariant representations of the
spin – in vector and tensor forms. All Poincaré-invariant spin operators of Dirac
particles are classified on this basis.
Citation:
V. A. Bordovitsyn, I. M. Ternov, “Poincaré invariant representation of the spin in quantum theory”, TMF, 51:3 (1982), 327–334; Theoret. and Math. Phys., 51:3 (1982), 529–534