Data-driven evaluations of Euclidean windows to scrutinize hadronic vacuum polarization

G. Colangelo, A. X. El-Khadra, M. Hoferichter, A. Keshavarzi, C. Lehner, P. Stoffer, T. Teubner

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, we discuss how windows in Euclidean time can be used to isolate the origin of potential conflicts between evaluations of the hadronic-vacuum-polarization (HVP) contribution to the anomalous magnetic moment of the muon in lattice QCD and from e+e→hadrons cross-section data. We provide phenomenological comparison numbers evaluated from e+e→hadrons data for the window quantities most commonly studied in lattice QCD, complete with the correlations among them. We discuss and evaluate modifications of window parameters that could be useful in dissecting the energy dependence of tensions in the HVP integral and emphasize that further optimizations require a precise knowledge of the full covariance matrix in lattice-QCD calculations as well.

Original languageEnglish (US)
Article number137313
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume833
DOIs
StatePublished - Oct 10 2022

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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