Over the last decade, the gradient flow formalism became an important tool for lattice simulations of Quantum Chromodynamics. Most prominently, scale setting strategies based on the gradient flow superseded previous strategies. Moreover, the gradient flow offers remarkable renormalization properties which pave the way for cross-fertilization between perturbative and lattice calculations.
In this talk we introduce the gradient flow formalism and outline the perturbative approach. Employing the flowed operator product expansion, we construct the flowed equivalents of the current-current operators of the electroweak Hamiltonian. They allow for simpler transformations between lattice and perturbative schemes and might reduce the uncertainties of theoretical predictions for low-energy flavor observables.
|First author||Fabian Lange|
|Collaboration / Activity||no collaboration|