Effective Angular Momentum Operators in NRQED and Matching at One-Loop Order

Details Effective Angular Momentum Operators in NRQED and Matching at One-Loop Order Effective Angular Momentum Operators in NRQED and Matching at One-Loop Order

2010-12-16

arxiv.org/abs/1012.3668v2

JHEP 1102:107,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages, 6 figures, 2 tables; published version

Scientific paper

10.1007/JHEP02(2011)107

We derive the effective angular momentum operator to $1/m^2$ and one-loop order in non-relativistic quantum electrodynamics (NRQED). In both dimensional and three-momentum-cutoff regularization schemes, we obtain the non-relativistic expansion for the spin and orbital angular momentum operators of the electron and photon, respectively. Our result is useful in precision calculations of the angular momentum properties for non-relativistic QED bound states, such as atom systems.

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