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30.01.2023 / 15:00 / Zeuthen, Zoom
Lattice seminarNonperturbative renormalisation for local composite operators in lattice field theory | Lattice seminar
Prof. Chris Monahan (College of William & Mary)
The gradient flow is a widely-used technique in lattice field theory that exponentially suppresses ultraviolet field fluctuations and thus removes ultraviolet divergences (up to a multiplicative fermionic wavefunction renormalization). The flow can be used to describe real-space Wilsonian renormalization group transformations and determine the nonperturbative scale dependence of both coupling constants and local operators. We recently proposed a new nonperturbative renormalization scheme for local composite fermionic operators that uses the gradient flow and is amenable to numerical calculations. I will present our nonperturbative results for the beta function and the Lambda parameter in two flavour quantum chromodynamics, along with the nonperturbative running of quark bilinear operators, obtained using our gradient flow scheme.
More Information: https://indico.desy.de/category/873/
