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Stable calculations for unstable particles: restoring gauge invariance

✍ Scribed by Ernestos N. Argyres; Wim Beenakker; Geert Jan van Oldenborgh; Ansgar Denner; Stefan Dittmaier; Jiri Hoogland; Ronald Kleiss; Costas G. Papadopoulos; Giampiero Passarino

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 699 KB
Volume: 358
Category: Article
ISSN: 0370-2693
DOI: 10.1016/0370-2693(95)01002-8

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New, gauge-independent, second-order Lagrangian for the motion of classical, charged test particles is proposed. It differs from the standard, gauge-dependent, first-order Lagrangian by boundary terms only. A new method of deriving equations of motion from field equations is developed. When applied