Chiral effective action of QCD: Precision tests, questions and electroweak extensions

Abstract

This talk first discusses some aspects of the chiral expansion with three light flavours related to the (non) applicability of the OZI rule. Next, the extension of ChPT to an effective theory of the full standard model is considered. Some applications of a systematic description of the coupling constants by sum rules (e.g. to the determination of quark masses and $K_{l3}$ decays) are presented.

6 pages, plenary talk at the International Conference on QCD and Hadronic physics, Beijing 16-20 June 2005

References in corpus (6)

• A new analysis of $\pi K$ scattering from Roy and Steiner type equations
• Chiral Perturbation Theory with Virtual Photons and Leptons
• Electromagnetic corrections in hadronic processes
• Radiative corrections in weak semi-leptoni processes at low energy: a two-step matching determination
• Low Energy Constants from Kl4 Form-Factors
• $\pi K$ sum rules and the SU(3) chiral expansion