Singlet night in Feynman-ville: one-loop matching of a real scalar

Ulrich Haisch, Maximilian Ruhdorfer, Ennio Salvioni, Elena Venturini, Andreas Weiler

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

A complete one-loop matching calculation for real singlet scalar extensions of the Standard Model to the Standard Model effective field theory (SMEFT) of dimension- six operators is presented. We compare our analytic results obtained by using Feynman diagrams to the expressions derived in the literature by a combination of the universal one-loop effective action (UOLEA) approach and Feynman calculus. After identifying contributions that have been overlooked in the existing calculations, we find that the pure diagrammatic approach and the mixed method lead to identical results. We highlight some of the subtleties involved in computing one-loop matching corrections in SMEFT.

Original languageEnglish
Article number164
JournalJournal of High Energy Physics
Volume2020
Issue number4
DOIs
StatePublished - 1 Apr 2020

Keywords

  • Beyond Standard Model
  • Effective Field Theories

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