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arXiv · hep-ph/9706515

Infra-Red Finite Charge Propagation

Emili Bagan·Bartomeu Fiol·Martin Lavelle·David McMullan
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Abstract

The Coulomb gauge has a long history and many uses. It is especially useful in bound state applications. An important feature of this gauge is that the matter fields have an infra-red finite propagator in an on-shell renormalisation scheme. This is, however, only the case if the renormalisation point is chosen to be the static point on the mass shell, p = (m, 0, 0, 0). In this letter we show how to extend this key property of the Coulomb gauge to an arbitrary relativistic renormalisation point. This is achieved through the introduction of a new class of gauges of which the Coulomb gauge is a limiting case. A physical explanation for this result is given.

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Emili Bagan, Bartomeu Fiol, Martin Lavelle, David McMullan. 1997-06-26. Infra-Red Finite Charge Propagation. https://doi.org/10.1142/s0217732397001849

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