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Complexica (talk | contribs) →Magnetostatics: The Darwin interaction: Interaction between current loops in a simple plasma or electron gas |
Complexica (talk | contribs) →The interaction energy: Common integrals in quantum field theory |
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and I and K are modified Bessel functions. we have assumed that the two currents have the same charge and speed.
We have made use of the integral (see [[Common integrals in quantum field theory]])
:<math>
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