Higgs and Effective Field Theory - HEFT 2026

Session

Renormalisation

8 Jun 2026, 14:00

Jardí Botànic, Valencia

69. TBD

Lukas Born

08/06/2026, 14:00

9. Curiosities in the Renormalization Group for EFTs

Anders Eller Thomsen (University of Bern)

08/06/2026, 14:30

Recent works have observed spurious divergences in the RG functions of several EFTs. I will show the origin of these divergences and how they can be addressed by including non-minimal source counterterms. Some of the divergences are related to ambiguities introduced by the presence of flavor. I will give an account of how the redundancies in the EFT basis give rise to additional, unphysical...

6. EFT meets CFT: Operators with large number of fields

Johan Henriksson (CERN)

08/06/2026, 14:50

Anomalous dimensions of composite operators determine the running of the corresponding couplings in a general QFT/EFT. They also provide a perturbative estimate of the spectrum of interacting conformal field theories (CFTs) at fixed-points of the RG flow. The latter application motivates the computation of anomalous dimensions of composite operators with growing number of field and derivative...

49. Renormalize SMEFT to Dimension Eight with EFT Tools

Zhe Ren (University of Granada)

08/06/2026, 15:10

We compute the one-loop running of dimension-eight two-fermion operators induced by pairs of dimension-six terms and dimension-eight terms in the Standard Model Effective Field Theory (SMEFT). The calculation is performed off shell, for which we obtain and provide a new and explicitly Hermitian basis of dimension-eight Green’s functions. The analysis involves a large set of redundant...

70. TBD

Peter Stoffer

09/06/2026, 16:50

33. Top-to-Down NLL EFT Analysis: Pheno Implications and Scale Dependence

Pol Morell Ferrer (Universitat de Barcelona)

09/06/2026, 17:20

After much effort from several groups in the EFT community, most of the two-loop Renormalization Group equations are now known in both the SMEFT and the LEFT. In this project, we have implemented them into the Mathematica package DsixTools, and numerically solved them consistently to NLL precision, together with the already well-known one-loop SMEFT-LEFT matching, in order to generate a...

18. Symmetry-restoring finite counterterms of SMEFT four-fermion operator insertions at one-loop

Sergio Ferrando Solera

09/06/2026, 17:40

Dimensional regularization is nowadays the most used technique to perform loop calculations in Quantum Field Theories. However, it faces some complications when applied to chiral gauge theories such as the Standard Model of particle physics because it is not possible to define a mathematically consistent D-dimensional scheme that preserves gauge symmetries. Nonetheless, for a theory free of...

38. Mapping between $\gamma_5$ schemes in the Standard Model Effective Field Theory

Stefano Di Noi (KIT (ITP))

09/06/2026, 18:00

In this talk I will present the relation between two distinct prescriptions for $\gamma_5$ in dimensional regularization – the Breitenlohner Maison t’Hooft Veltman (BMHV) scheme and Naive Dimensional Regularisation (NDR) in the SMEFT.
I will show how the quantum effective action can be translated between both schemes and present these translation rules for the Wilson Coefficients. I will...

48. Two-Loop Renormalization of Chiral SU(N) Gauge Theories: Toward a Systematic Extension to Effective Field Theories

Vera Paroutiadou (ETH Zurich)

09/06/2026, 18:20

We revisit the renormalization of generic non-Abelian gauge theories of SU(N) type in the presence of γ₅ within the BMHV scheme. Using algebraic renormalization, we derive the complete structure of one- and two-loop counterterms, including evanescent contributions arising from the non-anticommuting γ₅, and explicitly construct the finite counterterms required to restore BRST symmetry.

As a...