Physical Degrees of Freedom for Gauge Fields and the Issue of Spin

Abstract

The conflict between the physical degrees of freedom of gauge bosons and the Lorentz group irreps naturally used to describe their couplings to matter fields are illustrated and discussed, and applied to issues of linear and angular momentum.

Comments: 10pp., no figures, to appear in PACSpin2011 (Cairns, 20-24 June, 2011) conf. proc. (AIP)