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One-loop vacuum polarization diagram.

This is the one loop contribution to the photon propagator Π due to vacuum polarization in quantum electrodynamics. It contributes to a wave function renormalization for the photon, leading to a charge screening. It has a logarithmic divergence.

Similar one-loop diagrams can be considered for other gauge bosons, such as W, Z and the gluons.

See also

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  • (del) (cur) 03:20, 10 January 2005 . . Phys ( Talk | contribs) . . 154×84 (1,681 bytes) (1-loop vacuum polarization diagram)

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  • Vacuum polarization