Hadronic light-by-light contribution to the muon anomaly from lattice QCD with infinite volume QED at physical pion mass

2023/04/10 by Blum, Thomas, Christ, Norman, Hayakawa, Masashi +5 · 6 citations
#FOS: Physical sciences #High Energy Physics - Lattice (hep-lat)

paper · doi:10.48550/arxiv.2304.04423

Abstract

The hadronic light-by-light scattering contribution to the muon anomalous magnetic moment, (g-2)/2, is computed in the infinite volume QED framework with lattice QCD. We report a_μ^HLbL=12.47(1.15)(0.95) × 10^-10 where the first error is statistical and the second systematic. The result is mainly based on the 2+1 flavor Möbius domain wall fermion ensemble with inverse lattice spacing a^-1 = 1.73~GeV, lattice size L=5.5~fm, and m_π= 139~MeV, generated by the RBC-UKQCD collaborations. The leading systematic error of this result comes from the lattice discretization. This result is consistent with previous determinations.

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