Properties of light scalar mesons in the complex plane

Abstract

The flavour and glue structure of the light scalar mesons in QCD are probed by studying the couplings of the $\sigma (600)$ and $f_0(980)$ to the operators $\bar{q}q$, ${\theta }_{\mu }^{\mu }$ and to two photons.

Comments: Talk given at the XIV international conference on hadron spectroscopy (hadron 2011), june 2011 Munich