PoS - Proceedings of Science
Volume 445 - 21st Conference on Flavor Physics and CP Violation (FPCP2023) - Muon g-2
Puzzles in the hadronic contributions to the muon anomalous magnetic moment
G. Colangelo*, M. Hoferichter and P. Stoffer
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Pre-published on: September 29, 2023
Published on: November 14, 2023
We summarize recent developments in the Standard-Model evaluation of the anomalous magnetic moment of the muon $a_\mu$, both in the hadronic-light-by-light and hadronic-vacuum-polarization contributions. The current situation for the latter is puzzling as we are confronted with multiple discrepancies that are not yet understood. We present updated fits of a dispersive representation of the pion vector form factor to the new CMD-3 data set and quantify the tensions with the other high-statistics $e^+e^-\to\pi^+\pi^-$ experiments in the contribution to $a_\mu$ in the energy range up to $1$ GeV, as well as in the corresponding contribution to the intermediate Euclidean window.
DOI: https://doi.org/10.22323/1.445.0042
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