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Communication Dans Un Congrès Année : 2019

Complete One-Loop Renormalization of the Higgs-Electroweak Chiral Lagrangian

Claudius Krause
  • Fonction : Auteur
Gerhard Buchalla
  • Fonction : Auteur
Oscar Cata
  • Fonction : Auteur
Alejandro Celis
  • Fonction : Auteur

Résumé

The electroweak sector of the Standard Model can be formulated in a way similar to Chiral Perturbation Theory (ChPT), but extended by a singlet scalar. The resulting effective field theory (EFT) is called Higgs-Electroweak Chiral Lagrangian (EWCh$\mathcal{L}$) and is the most general approach to new physics in the Higgs sector. It solely assumes the pattern of symmetry breaking leading to the three electroweak Goldstone bosons (i.e. massive $W$ and $Z$) and the existence of a Higgs-like scalar particle. The power counting of the EWCh$\mathcal{L}$ is given by a generalization of the momentum expansion of ChPT. It is connected to a loop expansion, making the theory renormalizable order by order in the EFT.I will briefly review the construction of the EWCh$\mathcal{L}$ and its power counting. Then, I will discuss the complete one-loop renormalization of the EWCh$\mathcal{L}$ employing the background-field method and the super-heat-kernel expansion. This computation confirms the power counting assumptions, is consistent with the completeness of the operator basis, and reproduces known results of subsectors in the appropriate limits.Preprint numbers: FERMILAB-CONF-19-066-T

Dates et versions

hal-02279103 , version 1 (05-09-2019)

Identifiants

Citer

Claudius Krause, Gerhard Buchalla, Oscar Cata, Alejandro Celis, Marc Knecht. Complete One-Loop Renormalization of the Higgs-Electroweak Chiral Lagrangian. 9th International Workshop on Chiral Dynamics, Sep 2018, Durham, United States. pp.072, ⟨10.22323/1.317.0072⟩. ⟨hal-02279103⟩
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