Jun 13 – 17, 2011
Europe/Berlin timezone
Proceedings are now available online at <a href="http://www.slac.stanford.edu/econf/C110613/">eConf</a>

Properties of rho and sigma mesons from unitarized Chiral Perturbation Theory.

Jun 14, 2011, 6:20 PM
1h 10m
Millerzimmer (Künstlerhaus)



poster Poster Session Poster Session


Guillermo Ríos (Universidad Complutense de Madrid)


We study the rho(770) and sigma(600) resonances by means of the Inverse Amplitude Method (IAM). The IAM is based on unitarity, analyticity and Chiral Perturbation Theory only and generates poles on the second Riemann sheet of pion-pion partial wave amplitudes associated to the resonances without any a priori assumptions on their existence or nature. In particular, we study the leading 1/N_c dependence of some resonance parameters to sheds light on their espectroscopic nature. The rho meson follows the expected qqbar scaling whereas we find a non qqbar dominant component for the sigma. We also study the m_\pi dependence of the resonance parameters to connect with lattice studies.

Primary author

Guillermo Ríos (Universidad Complutense de Madrid)

Presentation materials