Position-space approach to hadronic light-by-light scattering in the\n muon g-2 on the lattice

2016/09/27 by Nils Asmussen, Asmussen, Nils, Jeremy Green +5 · 3 citations
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.1609.08454

openalex publication_date 2016/09/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The anomalous magnetic moment of the muon currently exhibits a discrepancy of\nabout three standard deviations between the experimental value and recent\nStandard Model predictions. The theoretical uncertainty is dominated by the\nhadronic vacuum polarization and the hadronic light-by-light (HLbL) scattering\ncontributions, where the latter has so far only been fully evaluated using\ndifferent models. To pave the way for a lattice calculation of HLbL, we present\nan expression for the HLbL contribution to g-2 that involves a\nmultidimensional integral over a position-space QED kernel function in the\ncontinuum and a lattice QCD four-point correlator. We describe our\nsemi-analytic calculation of the kernel and test the approach by evaluating the\n\π⁰-pole contribution in the continuum.\n

Cited by

• HLbL contribution to the muon g-2 using twisted-mass fermions at the physical point
• Euclidean coordinate-space perturbation theory with a single mass scale
• Comparing QCD+QED via full simulation versus the RM123 method: U-spin window contribution to a_μ^HVP

Related

• Hadronic light-by-light scattering in the muon g-2
• Developments in the position-space approach to the HLbL contribution to\n the muon g-2 on the lattice
• Lattice Calculation of the Connected Hadronic Light-by-Light Contribution to the Muon Anomalous Magnetic Moment
• Hadronic corrections to the muon anomalous magnetic moment from lattice QCD
• Data-driven approximations to the Hadronic Light-by-Light scattering contribution to the muon (g-2)