Speaker
Jose Ramon Pelaez sagredo
(Universidad Complutense de Madrid)
Description
We use NLO unitarized SU(3) Chiral Perturbation Theory (ChPT) to generate the lightest scalar and vector resonances,
in terms of the ChPT renormalized low-energy constants, with no additional parameters. By varying the quark masses, we follow the poles associated with each of these resonances through different Riemann sheets
until we reach the SU(3) and chiral limits. In a regime, resonance poles in the contiguous sheet become degenerate for members of the same multiplet, and we identify them firmly as SU(3) multiplet members.
We also demonstrate that poles in other sheets are not degenerate, even in this limit.
Author
Jose Ramon Pelaez sagredo
(Universidad Complutense de Madrid)
Co-authors
Jacobo Ruiz de Elvira Carrascal
(Complutense University of Madrid)
Pablo Rabán Mondéjar
(Universidad Complutense de Madrid)