Angular Momentum Decomposition for an Electron

preprint2008arXivOpen access

Abstract

We calculate the orbital angular momentum of the `quark' in the scalar diquark model as well as that of the electron in QED (to order αα). We compare the orbital angular momentum obtained from the Jaffe-Manohar decomposition to that obtained from the Ji relation and estimate the importance of the vector potential in the definition of orbital angular momentum.

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