Volume 518 -
The 42nd International Symposium on Lattice Field Theory
(LATTICE2025) -
Parallel Session Hadronic contribution to the magnetic moment of muon
Hadronic contributions to $\alpha(Q^{2})$ and $\sin^{2}\theta_\text{W}(Q^{2})$ from spectral reconstruction of lattice-QCD data.
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Abstract
We present preliminary results from a lattice-QCD study of the hadronic contributions to the running of the electromagnetic coupling, $\Delta\alpha(Q^2)$, and the electroweak mixing angle, $\Delta\sin^2\theta_\text{W}(Q^2)$. Using $N_f = 2+1+1$ HISQ ensembles at physical quark masses, we discuss the challenges posed by strong statistical correlations in the time-momentum representation and propose a spectral-reconstruction strategy to obtain controlled continuum-extrapolated results across the full energy range.
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Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.