Contributor info: Mr Jesús Alejandro Miranda Hernández

Pere Masjuan, Alejandro Miranda, Pablo Roig

SciPost Phys. Proc. 17, 023 (2025) · published 23 July 2025 | Toggle abstract · pdf

We review the $\tau$ data-driven computation of Euclidean windows for the hadronic vacuum polarization contribution to the muon anomalous magnetic moment ($a_\mu$), which agree with the lattice results, making the difference of the $e^+e^-$ data-driven methods with them more intriguing. This conundrum needs to be solved by next year, when the final FNAL $a_\mu$ measurement will be published, in order to extract firm conclusions on possible new physics effects.

Jesús Alejandro Miranda Hernández

SciPost Phys. Proc. 17, 003 (2025) · published 23 July 2025 | Toggle abstract · pdf

We briefly review electromagnetic radiative corrections in semileptonic tau decays and their main applications.

Jesús Alejandro Miranda Hernández, Pablo Roig Garcés

SciPost Phys. Proc. 16, 032 (2025) · published 15 July 2025 | Toggle abstract · pdf

We revisit the radiative corrections to the $\tau^-\to\pi^-\pi^0\nu_\tau(\gamma)$ decays using Resonance Chiral Theory for the structure-dependent part. This channel is the most important one to understand the hadronic vacuum polarization piece of the muon g-2, which dominates the uncertainty of its data-driven prediction in the Standard Model. Using our results, the discrepancy between theory and experiment for this observable is reduced to $\sim2.2\sigma$.