Hadronic contributions to $\alpha(Q^{2})$ and $\sin^{2}\theta_\text{W}(Q^{2})$ from spectral reconstruction of lattice-QCD data.

Proceedings of The 42nd International Symposium on Lattice Field Theory — PoS(LATTICE2025) 2026 Open access

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Authors: Adrián del Pino Rubio, David A. Clarke, Carleton DeTar, Aida X El-Khadra, Elvira Gámiz, Steven Gottlieb, Anthony V. Grebe, Leon Hostetler, William Jay, Andreas S. Kronfeld, Shaun Lahert, Jack Laiho
+8 more Michael Lynch, Andrew Lytle, E. T. Neil, Curtis T. Peterson, James N. Simone, Jacob W. Sitison, Ruth S. Van de Water, Alejandro Vaquero
DOI: 10.22323/1.518.0204
Cited by: 1

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.

Fields of Study & Subjects

Quantum Chromodynamics and Particle Interactions Particle physics theoretical and experimental studies Computational Physics and Python Applications

Publication details

Journal / source
Proceedings of The 42nd International Symposium on Lattice Field Theory — PoS(LATTICE2025)
Publisher
SISSA Medialab
Pages
204–204
Publication date
2 July 2026
Language
EN