No relativistic probability current for any spin
arXiv:1811.03323 · doi:10.1088/1751-8121/ab1bc9
Abstract
We investigate whether the Newton-Wigner position probability density, extended from spinless particles to electrons/positrons and particles of higher spin, can be incorporated as the zero component of a four-component probability current density that transforms locally as a four-vector function of the spacetime coordinates. We find that this is not possible, in all cases.
7 pages, no figures