Vortex solutions of the Dirac equation carry total angular momentum n + 1/2 and the paper proposes a helicity-based characterization, but the claimed helicity anomaly comes from an invalid truncated-domain calculation.
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Spin-Orbit Structure and Helicity Anomaly in Relativistic Electron Vortex Beams
Vortex solutions of the Dirac equation carry total angular momentum n + 1/2 and the paper proposes a helicity-based characterization, but the claimed helicity anomaly comes from an invalid truncated-domain calculation.