EFTools — Automated tools for Effective Field Theories with FeynRules

• Applicant: Professor Dr. Claude Duhr
• Subject Area: Nuclear and Elementary Particle Physics, Quantum Mechanics, Relativity, Fields
• Term: since 2022
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 499573813

With the discovery of the Higgs boson and the absence of signals of resonant new physics at the LHC, particle physics has entered a new era. In this scenario new physics effects are most conveniently parametrised by an Effective Field Theory (EFT) approach, where the Standard Model (SM) of particle physics is supplemented by new operators suppressed by the new physics scale. The upcoming Run III of the LHC will constrain these effective operators, and in this way eventually find, or rule out, indications for physics beyond the SM at the TeV scale. It is therefore important and timely to develop new and efficient theory tools for computations in EFTs at current and future colliders.The EFTools proposal will develop a set of novel algorithms and computer codes that will change the way particle theorists and phenomenologist work. Its starting point is the public computer package FeynRules, which is one of the main tools used to turn theoretical ideas into predictions for collider experiments. The usage of FeynRules in the context of EFTs, however, is still limited. The main goal of the project is therefore to bring FeynRules to the next level. In a first step, the project will develop a toolbox for EFT computations, like the automated reduction to a basis of operators. In a second step, EFTools will develop new ingredients needed to compute precise predictions for collider experiments including effects due to the exchange of virtual quanta. In particular, the project will develop a new approach to the computation of so-called R2-terms in EFTs and the SM, and it will for the first time compute the so-called two-loop anomalous dimension matrix for dimension-six operators. The final aim of the project is to release a new version of FeynRules which goes beyond the state-of-the-art and is ready to cope with the challenges required to make precision predictions for collider experiments, in the SM and beyond.

• DFG Programme: Research Grants
• International Connection: Belgium, France
• Cooperation Partners: Professorin Dr. Celine Degrande; Professor Dr. Benjamin Fuks; Professor Dr. Fabio Maltoni