2014/10/26 by Maarten Golterman, Kim Maltman, Golterman, Maarten +3
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.1410.7068
openalex publication_date 2014/10/26 · openalex created_date 2022/12/16 · openalex updated_date 2026/07/28
A highly physical model of the subtracted I=1 vector polarization, obtained using a dispersive representation with precise hadronic τ decay data as input, is used to investigate systematic issues in the lattice evaluation of the leading order hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon. The model is also employed to study possible resolutions of these problems. A hybrid approach to analyzing lattice data, involving low-order Padé, low-degree conformal-variable polynomial, or supplemented NNLO ChPT fits for Q2 below ∼ 0.1-0.2 GeV2 and direct numerical integration of lattice data above this point, is shown to bring the systematic issues identified under control at the sub-1% level.