9th Plenary Workshop of the Muon g-2 Theory Initiative

Update on the calculation of the long-distance $\pi^0$ exchange part of the hadronic light-by-light (HLbL) contribution to muon g-2 from RBC-UKQCD.

Aug 6, 2026, 11:15 AM

30m

GS117 and GS119 (Department of Physics, University of Connecticut)

Lattice HLbL

Speaker

Anton Shcherbakov (UCONN)

Description

We will provide an update to the RBC-UKQCD collaborations on the lattice calculation of the position-space, long-distance $\pi^0$ exchange part of the HLbL contribution to the anomalous magnetic moment of the muon. We will present the results of the calculation from 48I and 64I gauge-field ensembles at $a^{-1}=1.73$ GeV and $a^{-1}=2.359$ GeV, respectively. Additionally, we will present the comparison of the above results with the model calculations of the $\pi^0$ exchange contribution and the long-distance part of the pion-pole contribution, both based on the Lowest Meson Dominance (LMD) model for the $\pi^0$ transition form factor.