English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present a covariant formulation of the Kinoshita, Lee, Nauenberg (KLN)theorem for processes involving the radiation of soft particles. The role ofthe disconnected diagrams is explored and a rearrangement of the perturbationtheory is performed such that the purely disconnected diagrams are factoredout. The remaining effect of the disconnected diagrams results in a simplemodification of the usual Feynman rules for the S-matrix elements. As anapplication, we show that when combined with the Low theorem, this leads to aproof of the absense of the $1/Q$ corrections to inclusive processes (like theDrell-Yan process). In this paper the abelian case is discussed to all ordersin the coupling.Comment: 27 pages, LaTeX, 14 figure

Kinoshita-Lee-Nauenberg theorem and soft radiation in gauge theories: Abelian case