QED and strong isospin corrections in the hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon

2022/02/11 by Letizia Parato, Parato, L., Sz. Borsányi +25
Engineering · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #Particle Accelerators and Free-Electron Lasers #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · doi:10.48550/arxiv.2202.05807

openalex publication_date 2022/02/11 · openalex created_date 2022/08/07 · openalex updated_date 2026/07/28

Abstract

Recently, the Budapest-Marseille-Wuppertal collaboration achieved sub-percent precision in the evaluation of the lowest-order hadronic vacuum polarization contribution to the muon g_μ-2 (arXiv:hep-lat/2002.12347v3). At this level of precision, isospin-symmetric QCD is not sufficient. In this contribution we review how QED and strong-isospin-breaking effects have been included in our work. Isospin breaking is implemented by expanding the relevant correlation functions to second order in the electric charge e and to first order in m_u-m_d. The correction terms are then computed using isospin-symmetric configurations. The choice of this approach allows us to better distribute the available computing resources among the various contributions.

Related

• Isospin breaking corrections to the HVP at the physical point
• Isospin-breaking corrections to the muon magnetic anomaly in Lattice QCD
• HVP contribution of the light quarks to the muon (g - 2) including isospin-breaking corrections with Twisted-Mass fermions
• Calculating the QED correction to the hadronic vacuum polarisation on the lattice
• Leading isospin breaking effects in the HVP contribution to a_μ and to the running of α