We computed for the first time the τ data-driven Euclidean windows for the hadronic vacuum polarization contribution to the muon g-2. We showed that τ-based results agree with the available lattice window evaluations and with the full result. On the intermediate window, where all lattice evaluations are rather precise and agree, τ-based results are compatible with them. This is particularly interesting, given that the disagreement of the e+e− data-driven result with the lattice values in this window is the main cause for their discrepancy, affecting the interpretation of the aμ measurement in terms of possible new physics.
@article{arxiv.2411.09811,
title = {Hadronic vacuum polarization contribution to the muon g-2 on Euclidean windows from tau data},
author = {Pere Masjuan and Alejandro Miranda and Pablo Roig},
journal= {arXiv preprint arXiv:2411.09811},
year = {2025}
}
Comments
6 pages, 3 figures. Contribution to the proceedings of QNP2024 - The 10th International Conference on Quarks and Nuclear Physics, to be published in PoS