Isospin-breaking corrections for high-precision tests of the Standard Model from domain wall fermions

Our understanding of Nature depends on our ability to validate, with experiments, theoretical predictions for observable quantities.

The Standard Model of particles describes three of the four known fundamental forces in Nature and has been extensively tested at collider experiments over the last decades. Strong interactions are one of its components and are characterized by so-called non-perturbative phenomena.

Their low-energy contribution to quantities measurable in experiments can be predicted from first principles by discretizing QCD on a four-dimensional lattice and simulate it with Monte Carlo methods on world-class HPC facilities.

To test the Standard Model to unprecedented precision the interplay between strong and electromagnetic forces must be considered, and the goal of this project is the prediction of the so-called isospin-breaking corrections for several phenomenologically relevant quantities, from first principles Lattice QCD+QED simulations.

The primary focus is on the anomalous magnetic moment of the muon, a promising candidate for unveiling new fundamental phenomena beyond our current understanding, but this project opens the door to the precise assessment of isospin-breaking effects also in hadronic tau decays or meson leptonic decays.