Precise measurements of the lepton properties provide stringent tests of the Standard Model
and accurate determinations of its parameters. We overview the present status of τ physics …

Hadronic τ decays provide a clean laboratory for the precise study of quantum
chromodynamics (QCD). Observables based on the spectral functions of hadronic τ decays …

We employ a mathematical framework based on rational approximants in order to calculate
the pseudoscalar-pole piece of the hadronic light-by-light contribution to the anomalous …

In this work we study the axial contributions to the hadronic light-by-light piece of the muon
anomalous magnetic moment. We point out some theoretical ambiguities in previous …

We revisit the isospin-breaking and electromagnetic corrections to the decay τ-→ π-π 0 ν τ,
which allow its use as input in the two-pion contribution to the (leading-order) hadronic …

Vacuum polarization integrals involve the vector spectral functions which can be
experimentally determined from two sources:(i) e+ e-annihilation cross sections and (ii) …

We derive expressions for strangeness-changing scalar form factors, which incorporate
known theoretical constraints both at low and high energies. Their leading behaviour in the …

We calculate the leading isospin-violating and electromagnetic corrections for the decay
τ−→ π0π− ντ at low energies. The corrections are small but relevant for the inclusion of τ …

We discuss the decay τ−→ ν τ π− π 0 γ in terms of a model with the correct low-energy
structure and with the relevant resonance degrees of freedom. The nontrivial radiative …

This paper reviews and updates the standard model prediction of the muon g-2. QED,
electroweak and hadronic contributions are presented, and open questions discussed. The …