Conveners
Parallel 1
- York Schröder (Universidad del Bio-Bio)
Parallel 1
- York Schröder (Universidad del Bio-Bio)
We present the calculation of the contributions from the chromomagnetic and four-top-quark operators within Standard Model Effective Field Theory (SMEFT) to Higgs boson pair production in gluon fusion, combined with NLO QCD corrections. The four-quark operators enter at two loops in this process and require the choice of a scheme to continue $\gamma_5$ to D dimensions. We report about new...
The dimensional renormalization of chiral gauge theories such as the electroweak Standard Model inevitably leads to the problem of accommodating the manifestly 4-dimensional nature of $\gamma_{5}$ in $D$ dimensions. In order to avoid inconsistencies at the multi-loop level, $\gamma_{5}$ can be treated rigorously as a non-anticommuting object using the Breitenlohner-Maison/'t Hooft-Veltman...
We discuss how causality, specifically in the loop-tree duality, can provide an efficient guiding principle to achieve theoretical predictions at higher orders for differential cross sections at colliders.
An explicit Loop Tree Duality (LTD) formula for two-loop Feynman integrals with integer power of propagators is presented and used for a numerical UV divergence subtraction algorithm. This algorithm proceeds recursively and it is based on the R operator and the Hopf algebraic structure of UV divergences. After a short review of LTD and the numerical evaluation of multi-loop integrals, LTD is...
Graphical functions are a well established tool to perform high loop order calculations for some QFT processes. Most notably, they were used to calculate the 7 loop $\phi^4$ and the 6 loop $\phi^3$ beta functions.
A new project aims to extend the use of graphical functions to particles with spin, with particular focus on Yang-Mills theory. We report on the status of this project.
