Conveners
Parallel A
- David Broadhurst (Open University, UK)
Parallel A
- David Broadhurst (Open University, UK)
With the upgraded Large Hadron Collider (LHC) operating at higher luminosity and the promise of even higher energy reach for future colliders, it has become imperative to compute precise theoretical predictions to contribute to this era of precision physics. It is particularly important to not only compute higher-order corrections but also include the contributions due to massive particles to...
The main analytical tool for analyzing Large Scale Structure surveys is the Effective Field Theory of Large Scale Structure (EFTofLSS). With increasing survey detail, higher precision in theoretical predictions becomes essential. However, extending integrations beyond the one-loop power spectrum faces limitations due to analytical challenges and computational costs. In this presentation, we...
It has been known for many years that methods inspired by string theory, such as the worldline formalism, allow one to write down integral representations that combine large numbers of Feynman diagrams of different topologies. However, to make this fact useful for state-of-the-art calculations one has to confront non-standard integration problems where neither the known integration techniques...
We show that even $\zeta$-functions may be removed from the $\beta$-functions of general multi-coupling theories up to high loop order by means of coupling redefinitions. For theories whose $\beta$-function is determined by the anomalous dimensions of the fields, such as supersymmetric theories, this corresponds to a renormalisation scheme change to a momentum subtraction scheme.
We present recent results of renormalizing QCD to high loop order in a variety of different renormalization schemes. For instance several schemes naturally depend only on the odd zetas up to five loops. This property is explored in other models and other spacetime dimensions.
