Hadronization in tau -> K K pi nu_tau decays

TL;DR

This paper models the hadronization process in tau decays to K K pi nu_tau using resonance theory, incorporating QCD constraints and chiral symmetry to predict spectral functions.

Contribution

It develops a resonance-based theoretical framework for tau decay hadronization, integrating QCD short-distance constraints and chiral symmetry principles.

Findings

Resonance theory effectively describes tau decay spectra.

Couplings determined by QCD spectral function constraints.

Framework sets the stage for improved experimental predictions.

Abstract

Hadronization in tau -> K K pi nu_tau decays is driven by both vector and axial-vector currents that we study, guided by the following principles: The 1/N_C expansion -worked out at leading order, considering only the contribution of the lightest spin one resonances-, approximate chiral symmetry at low energies and the appropriate asymptotic behaviour we demand to the associated form factors. All these features are implemented in the resonance theory. Most of its couplings are determined by imposing the short-distance requirements of vector and axial-vector spectral functions within QCD. We plan to improve our prediction of the hadronic spectra using recently available experimental data.