Concerning Bjorken's Model of Spontaneous Breakdown of Lorentz Invariance
arXiv:hep-th/0603009
Abstract
We revisit Bjorken's model of spontaneous breakdown of Lorentz invariance. We show that the model possesses zero mass, spin zero (scalar) Nambu-Goldstone boson, in addition to the zero mass, spin one (vector) photon.