An update of Euclidean windows of the hadronic vacuum polarization
hep-lat
/ Authors
T. Blum, P. A. Boyle, M. Bruno, D. Giusti, V. Gülpers, R. C. Hill, T. Izubuchi, Y. -C. Jang, L. Jin, C. Jung
and 7 more authors
A. Jüttner, C. Kelly, C. Lehner, N. Matsumoto, R. D. Mawhinney, A. S. Meyer, J. T. Tsang
/ Abstract
We compute the standard Euclidean window of the hadronic vacuum polarization using multiple independent blinded analyses. We improve the continuum and infinite-volume extrapolations of the dominant quark-connected light-quark isospin-symmetric contribution and address additional sub-leading systematic effects from sea-charm quarks and residual chiral-symmetry breaking from first principles. We find $a_μ^{\rm W} = 235.56(65)(50) \times 10^{-10}$, which is in $3.8σ$ tension with the recently published dispersive result of Colangelo et al., $a_μ^{\rm W} = 229.4(1.4) \times 10^{-10}$, and in agreement with other recent lattice determinations. We also provide a result for the standard short-distance window. The results reported here are unchanged compared to our presentation at the Edinburgh workshop of the g-2 Theory Initiative in 2022.