A possible assignment for the ground scalar meson nonet

Abstract

Based on the main assumption that the $a_0(980)$ and $D_{sJ}^{\ast }(2317)$ belong to the $1^3{P}_0$ $q\bar{q}$ multiplet, in the framework of Regge phenomenology and meson-meson mixing, it is suggested that the $a_0(980)$, $K_0^{\ast }(1052)$, $f_0(1099)$ and $f_0(530)$ constitute the ground scalar meson nonet, and that the $f_0(1099)$ is composed mostly of $s\bar{s}$ while the $f_0(530)$ is mainly $u\bar{u}+d\bar{d}$. It is supposed that these states would likely correspond to the observed scalar states $a_0(980)$, $\hat{I}º(900)$, $f_0(980)$ and $f_0(600)/\ddot{I}ƒ$, respectively. The agreement between the present findings and those given by other different approaches is satisfactory.

10 pages, to appear in Eur. Phys. J. A