Exploring the standard model of particle physics and finding new physics beyond is in many cases limited by the lack of high-precision knowledge of low-energy QCD effects. The only known systematically improvable method to compute such effects from first principles is lattice QCD.
For crucial topics such as the muon g-2, heavy-quark flavour physics, and the study of structure functions, the systematic uncertainty associated with the continuum limit of lattice QCD poses one of the most difficult challenges.
For the muon g-2 uncertainties associated with finite simulation volume are also crucial. Building on our successful project last year, we propose to generate the finest-yet dynamical lattice QCD gauge ensemble using chiral symmetric domain wall fermions at physical pion mass, the first N_f=2+1+1 domain-wall ensemble at physical pion mass, as well as a g-2 program in an 11fm box at physical pion mass.
This effort is only possible using the scale of resources made available in the EuroHPC JU Extreme Scale Access call.
The results of this proposal will have immediate impact on a high-precision calculation of the hadronic vacuum polarization contribution to clarify emerging tensions for the muon g-2 and have long-term benefits for a wide range of crucial observables.
University of Regensburg - Germany
University of Edinburgh - United Kingdom
University of Milano - Bicocca - Italy