Hope Park

Aug 2, 2024 | link.aps.org | UKQCD collaborations |Liverpool Hope |Hope Park |F. Erben

We present nonperturbative results for beyond the standard model kaon mixing matrix elements in the isospin symmetric limit (mu=md) of QCD, including a complete estimate of all dominant sources of systematic error. Our results are obtained from numerical simulations of lattice QCD with Nf=2+1 flavors of dynamical domain wall fermions. For the first time, these quantities are simulated directly at the physical pion mass mπ∼139  MeV for two different lattice spacings.

Jul 19, 2023 | link.aps.org | Liverpool Hope |N. Garron |Hope Park |C. Cahill

Abstract Hadronic matrix elements evaluated on the lattice can be converted to a continuum scheme such as MS¯ using intermediate nonperturbative renormalization schemes. Discretization effects on the lattice and convergence of the continuum perturbation theory are both scheme dependent and we explore this dependence in the framework of the Rome-Southampton method for generalized kinematics.