Speaker
Dr
Kohtaroh Miura
(CPT, Aix-Marseille Universite)
Description
Recent lattice QCD results for hadron vacuum polarization (HVP) and its contribution to muon anomalous magnetic moments (g-2) will be reviewed. There currently exists tension of more than 3-sigma deviations in muon g-2 between the BNL experiment with 0.5 ppm precision and the Standard Model (SM) prediction with the QCD dispersion relation used for HVP. The lattice QCD predictions without recourse to any experimental inputs provide an independent crosscheck of the dispersive approaches and important indications for assessing the SM prediction with measurements at ongoing/forthcoming experiments at Fermilab/JPARC aiming at around 0.1 ppm uncertainty. In this regard, I overview the lattice QCD challenges for the precise HVP determination and its contribution to muon g-2. In particular, I focus on the recent progress made in controling various systematics, and compare the results by various lattice groups. I briefly discuss the lattice versus dispersive results and outlook for the per-mil-level determination of the lattice HVP muon g-2, which is required by the experiments coming years.
Primary author
Dr
Kohtaroh Miura
(CPT, Aix-Marseille Universite)