The momentum operators corresponding to a localized massless particle
arXiv:math-ph/0507002 · doi:10.1016/S0034-4877(06)80017-0
Abstract
In this article we propose, using a purely group theoretical argument, that if a massless particle is localized, then there are only two momentum operator s corresponding to the localized state. We explicitly determine these self-adjoint operators.
9 pages