2024/12/19 by Dominik Erb, Erb, Dominik, Antoine Gérardin +9
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2412.14760
openalex publication_date 2024/12/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
We present our calculation of the isospin-violating part of the hadronic vacuum polarisation (HVP) contribution to muon (g-2) in lattice QCD at the SU(3)f symmetric point. The computation of the contributing fully connected diagrams with one internal photon as well as the computation of the only (mass) counterterm are shown. The latter is determined from the charged-neutral kaon mass splitting. We employ coordinate-space methods and a photon propagator which is regulated à la Pauli-Villars with a cutoff scale Λ well below the lattice cutoff. This regularization makes it possible for us to do crosschecks of individual contributions with calculations in the continuum. Our continuum extrapolated results show little to no dependence on Λ. This makes our final limit Λ→ ∞ straightforward.