RT Book, Section
T1 M_(π) and N_c dependence of resonances form Unitarized Chiral Perturbation Theory
A1 Rios, G.
A1 Hanhart, Christoph
A1 Peláez Sagredo, José Ramón
AB We review our studies on the ρ and σ resonances properties derived from the Inverse Amplitude Method. In particular, we study the leading 1/N_c behavior of the resonances masses and widths and their evolution with changing m_(π). The 1/N_c expansion gives a clear definition of q̅ q states, which is neatly satisfied by the ρ but not by the σ, showing that its dominant component is not  q̅q. The m_(π) dependence of the resonance properties is relevant to connect with lattice studies. We show that our predictions compare well with some lattice results and we find that the rho π πcoupling constant is m_π independent, in contrast with the σ π π coupling, that shows a strong m_π dependence.
PB Amer Inst Physics
SN 978-0-7354-0934-7
YR 2011
FD 2011
LK https://hdl.handle.net/20.500.14352/45617
UL https://hdl.handle.net/20.500.14352/45617
LA eng
NO ISSN: 0094-243X© 2011 American Institute of Physics 978-0-7354-0934-7.International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU 2010) (12. 2011. New York).
DS Docta Complutense
RD 10 may 2025