Tau data-driven evaluation of the Hadronic Vacuum Polarization

Author:

Pere Masjuan, Alejandro Miranda, Pablo Roig

Keyword:

High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), High Energy Physics - Lattice (hep-lat)

journal:

date:

2023-10-20 16:00:00

Abstract

Windows in Euclidean time have become a standard tool for comparing lattice QCD and data-driven computations of the hadronic vacuum polarization (HVP) contribution to the muon $g-2$. Here we review our results, obtained using isospin-rotated $\tau^-\to\pi^-\pi^0\nu_\tau$ data instead of $e^+e^-\to\pi^+\pi^-$ measurements, and compare them to other approaches. Consistency of the tau-based and lattice results hints to underestimated uncertainties in the $e^+e^-$ data. If that is the case, the theory prediction of the muon $g-2$ would only lie at $\sim 2\sigma$ from its measured value.

PDF: Tau data-driven evaluation of the Hadronic Vacuum Polarization.pdf