Abstract:Conceptual problems such as unphysical states and indefinite metric in conventional quantum electrodynamics are known to arise from the use of only the compact 0(2) subgroup of the full non-compact little group for massless particles, which is isomorphic to the two-dimensional Euclidean group E(2). We attempt to avoid these difficulties by proposing that elementary massless boson states transform as a faithful nonlinear realization of the full little group E(2) over the physically observed helicity states (pho… Show more
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