%0 Journal Article
%T Large-N(C) properties of the rho and f(0)(600) mesons from unitary resonance chiral dynamics
%A Nieves, J.
%A Pich, A.
%A Ruiz Arriola, E.
%J Physical Review D
%D 2011
%V 84
%N 9
%I Amer Physical Soc
%@ 1550-7998
%G English
%F Nieves_etal2011
%O WOS:000296890300012
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=799), last updated on Thu, 01 Dec 2011 15:47:06 +0000
%X We construct pi pi amplitudes that fulfill exact elastic unitarity, account for one-loop chiral perturbation theory contributions and include all 1/N(C) leading terms, with the only limitation of considering just the lowest-lying nonet of exchanged resonances. Within such a scheme, the N(C) dependence of sigma and rho masses and widths is discussed. Robust conclusions are drawn in the case of the rho resonance, confirming that it is a stable meson in the limit of a large number of QCD colors, N(C). Less definitive conclusions are reached in the scalar-isoscalar sector. With the present quality of data, we cannot firmly conclude whether or not the N(C) = 3 f(0)(600) resonance completely disappears at large N(C) or if it has a subdominant component in its structure, which would become dominant for a number of quark colors sufficiently large.
%R 10.1103/PhysRevD.84.096002
%U http://arxiv.org/abs/1107.3247
%U https://doi.org/10.1103/PhysRevD.84.096002
%P 096002-20pp