Four-dimensional helicity scheme and dimensional reconstruction

Radja Boughezal*, Kirill Melnikov, Francis John Petriello

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


The four-dimensional helicity regularization scheme is often used in one-loop QCD computations. It was recently argued in by that this scheme is inconsistent beyond the one-loop order in perturbation theory. In this paper, we clarify the reason for this inconsistency by studying the perturbative expansion of the vector current correlator in one-flavor QED through three-loop order. We develop a simple, practical way to fix the four-dimensional helicity scheme using the idea of dimensional reconstruction and demonstrate its application in several illustrative examples.

Original languageEnglish (US)
Article number034044
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number3
StatePublished - Aug 30 2011

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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