TL;DR
This paper reviews the QCD analysis of hadronic tau decays, highlighting recent determinations of fundamental parameters like alpha_s, |V_us|, and chiral couplings from experimental data.
Contribution
It provides a comprehensive summary of current phenomenological results and methods used to analyze tau decays within QCD framework.
Findings
Determined alpha_s(m_tau) = 0.338 ± 0.012 from tau decay data.
Measured |V_us| through Cabibbo-suppressed tau decays.
Extracted chiral-perturbation-theory couplings from spectral tau data.
Abstract
The QCD analysis of hadronic tau decays is reviewed and a summary of the present phenomenological status is presented. The following topics are discussed: the determination of alpha_s(m_tau) = 0.338 +- 0.012 from the inclusive tau hadronic width, the measurement of |V_us| through the Cabibbo-suppressed decays of the tau, and the extraction of chiral-perturbation-theory couplings from the spectral tau data.
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