Improving the Hadronization of QCD currents in TAUOLA and PHOKHARA

TL;DR

This paper improves the modeling of tau lepton decays into kaons and pions by applying QCD principles, leading to better predictions of hadronic spectra based on theoretical constraints and experimental data.

Contribution

It introduces a refined framework for hadronization in tau decays using large-N_C QCD, chiral symmetry, and asymptotic behavior, enhancing previous models.

Findings

Predicted hadronic spectra match BaBar data.

Constrained model couplings using QCD principles.

Enhanced understanding of vector and axial-vector current hadronization.

Abstract

We present our study of the hadronization structure of both vector and axial-vector currents leading to decays of the tau into two kaons and a pion. The cornerstones of our framework are the large-N_C limit of QCD, the chiral structure exhibited at low energies and the proper asymptotic behaviour, ruled by QCD, that is demanded to the associated form factors. The couplings of the theory are mostly constrained by this procedure and upon the analysis of BaBar data on e^+e^- -> KK pi we are able to predict the hadronic spectra.