Data-driven determination of the light-quark connected component of the intermediate-window contribution to the muon g-2

2023/06/29 by Benton, Genessa, Boito, Diogo, Golterman, Maarten +3 · 1 citation
#FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2306.16808

Abstract

We present the first data-driven result for a_μ^{\rm win,lqc}, the isospin-limit light-quark connected component of the intermediate-window Hadronic-Vacuum-Polarization contribution to the muon anomalous magnetic moment. Our result, (198.8± 1.1)× 10^-10, is in significant tension with eight recent mutually compatible high-precision lattice-QCD determinations, and provides enhanced evidence for a puzzling discrepancy between lattice and data-driven determinations of the intermediate window quantity, one driven largely by a difference in the light-quark connected component.

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