Extending the Universal One-Loop Effective Action: heavy-light coefficients - Archive ouverte HAL
Article Dans Une Revue Journal of High Energy Physics Année : 2017

Extending the Universal One-Loop Effective Action: heavy-light coefficients

Sebastian A. R. Ellis
  • Fonction : Auteur
Jérémie Quevillon
Tevong You
  • Fonction : Auteur
Zhengkang Zhang
  • Fonction : Auteur
Sebastian Ellis
  • Fonction : Auteur

Résumé

The Universal One-Loop Effective Action (UOLEA) is a general expression for the effective action obtained by evaluating in a model-independent way the one-loop expansion of a functional path integral. It can be used to match UV theories to their low-energy EFTs more efficiently by avoiding redundant steps in the application of functional methods, simplifying the process of obtaining Wilson coefficients of operators up to dimension six. In addition to loops involving only heavy fields, matching may require the inclusion of loops containing both heavy and light particles. Here we use the recently-developed covariant diagram technique to extend the UOLEA to include heavy-light terms which retain the same universal structure as the previously-derived heavy-only terms. As an example of its application, we integrate out a heavy singlet scalar with a linear coupling to a light doublet Higgs. The extension presented here is a first step towards completing the UOLEA to incorporate all possible structures encountered in a covariant derivative expansion of the one-loop path integral.

Dates et versions

hal-02908102 , version 1 (28-07-2020)

Identifiants

Citer

Sebastian A. R. Ellis, Jérémie Quevillon, Tevong You, Zhengkang Zhang, Sebastian Ellis. Extending the Universal One-Loop Effective Action: heavy-light coefficients. Journal of High Energy Physics, 2017, 08, pp.054. ⟨10.1007/JHEP08(2017)054⟩. ⟨hal-02908102⟩
20 Consultations
0 Téléchargements

Altmetric

Partager

More