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 subleading systematic effects from sea-charm quarks and residual chiral-symmetry breaking from first principles. We find aμW=235.56(65)(50)×10-10, which is in 3.8σ tension with the recently published dispersive result of aμW=229.4(1.4)×10-10 [G. Colangelo, A. X. El-Khadra, M. Hoferichter, A. Keshavarzi, C. Lehner, P. Stoffer, and T. Teubner, Phys. Lett. B 833, 137313 (2022)PYLBAJ0370-269310.1016/j.physletb.2022.137313] 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 [C. Lehner, Talk Presented at the 5th Plenary Meeting of the g-2 Theory Initiative in Edinburgh (2022)].

Blum, T., Boyle, P., Bruno, M., Giusti, D., Gülpers, V., Hill, R., et al. (2023). Update of Euclidean windows of the hadronic vacuum polarization. PHYSICAL REVIEW D, 108(5) [10.1103/PhysRevD.108.054507].

Update of Euclidean windows of the hadronic vacuum polarization

Bruno, M.;
2023

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 subleading systematic effects from sea-charm quarks and residual chiral-symmetry breaking from first principles. We find aμW=235.56(65)(50)×10-10, which is in 3.8σ tension with the recently published dispersive result of aμW=229.4(1.4)×10-10 [G. Colangelo, A. X. El-Khadra, M. Hoferichter, A. Keshavarzi, C. Lehner, P. Stoffer, and T. Teubner, Phys. Lett. B 833, 137313 (2022)PYLBAJ0370-269310.1016/j.physletb.2022.137313] 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 [C. Lehner, Talk Presented at the 5th Plenary Meeting of the g-2 Theory Initiative in Edinburgh (2022)].
Articolo in rivista - Articolo scientifico
Lattice QCD, muon anomalous magnetic moment
English
2023
108
5
054507
none
Blum, T., Boyle, P., Bruno, M., Giusti, D., Gülpers, V., Hill, R., et al. (2023). Update of Euclidean windows of the hadronic vacuum polarization. PHYSICAL REVIEW D, 108(5) [10.1103/PhysRevD.108.054507].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/448778
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