November 29, 2021 at 14:15

New directions in simulating quantum chromodynamics and the foundations of matter

What: New directions in simulating quantum chromodynamics and the foundations of matter

When: November 29, 2021 at 14:15


Who: Anthony Francis (Universität Bern)

Recent breakthroughs in measuring the anomalous magnetic moment of the muon have increased the tension with the standard model prediction. Simultaneously lattice Quantum Chromodynamics (QCD) calculations are catching up and are providing valuable non-perturbative input to the standard model prediction, e.g. by effectively constraining hadronic light-by-light scattering or the leading order hadronic contribution.This is an example of how today, the understanding of QCD dynamics in detail is a driver of progress in particle physics. Often this new understanding is derived from large scale numerical simulations of the full non-perturbative theory through lattice quantum field theory.The input of these simulations further impacts physics from nuclear applications, e.g. proton properties, parton distributions and multi-nucleon interactions, to the early universe and searches for new fundamental physics beyond the standard model.The key to lattice simulations are the ensembles of gauge configurations, i.e. the snap-shots of quantum space-time, that all these interesting observables are calculated on. In this talk I present new perspectives on generating these snap-shots. In particular the focus will be on the newly developed stabilised Wilson fermions (SWF) toolkit, its components and properties. I will show how SWF enable the jump towards novel master-field simulations that push up the size of the space-time volume generated to a regime where spatial sampling replaces Monte Carlo time sampling. I will also present how our newly founded collaborative effort, OpenLat, can provide access to state-of-the art SWF configurations with traditional volumes to the lattice community and how this can lead to new results in broad applications in the future.