  Exclusive semi-leptonic decays of the tau lepton offer a clean probe to study
the hadronization of QCD currents in its non-perturbative regime and learn
about resonance dynamics, which drives strong interactions in these processes.
In this theory outlook, I will use the simplest non-trivial di-pion tau decays
to illustrate briefly recent theoretical progress on these analyses and their
comparison to data.

High Energy Physics - Phenomenology;High Energy Physics - Experiment