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

Resonances and their Nc fates in U(3) chiral perturbation theory

Jun 16, 2011, 3:20 PM
Festsaal (Künstlerhaus)



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Dr Zhi-Hui Guo (Universidad de Murcia)


We first present the full one-loop calculation of meson-meson scattering in the framework of U(3) chiral perturbation theory with explicit resonance states in the Lagrangian. After the partial wave projection and resummation of the unitarity loops, we fit our theoretical formulas to the data to fix the free parameters and then calculate the resonance pole positions and residues, such as rho(770), K*(892), phi(1020), sigma, f0(980), f0(1370), a0(980), a0(1450), kappa, K*0(1430). The Nc trajectories of these resonance poles are specially paid attention to in this work, since this is the first time in the literature that the pseudo-Goldstone nature of the singlet eta_1 in large Nc limit is considered in determining the resonance Nc properties.

Primary author

Dr Zhi-Hui Guo (Universidad de Murcia)


Prof. Jose Antonio Oller (Universidad de Murcia)

Presentation materials