Speaker
Description
The chiral symmetry of QCD can be exploited to build an effective field theory, called Chiral Perturbation Theory ($\chi$PT), which allows to describe the interactions of light mesons at low energies, where the standard perturbative expansion in the strong coupling constant $\alpha_s$ is no longer possible.
Verification of the predictions of such models, such as the $\pi\gamma\rightarrow\pi\pi$, $\pi\gamma\rightarrow\pi\eta$, $K\gamma\rightarrow K\pi$ and other couplings arising as a consequence of the chiral anomaly, is important for understanding the low-energy interactions of hadrons.
This talk will focus on the experimental verification of the so-called anomalous couplings, in particular the result on the $F_{3\pi}$ constant describing the $\pi\gamma\rightarrow\pi\pi$ coupling, as well as other possible measurements aimed at testing the predictions of the chiral anomaly.
