This research demonstrates the Lorentz covariance of fixed-axis polarization states and compares them to conventional states, suggesting new model constructions.
Addressing the recent criticisms of Kvinikhidze and Miller, we prove that the spectator wave functions and currents based on “fixed-axis” polarization states (previously introduced by us) are Lorentz covariant, and find an explicit connection between them and conventional direction-dependent polarization states. The discussion shows explicitly how it is possible to construct pure S-wave models of the nucleon.
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Gross et al. (2008) studied this question.
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