On the scalar nonet in the extended Nambu Jona-Lasinio model

Details On the scalar nonet in the extended Nambu Jona-Lasinio model On the scalar nonet in the extended Nambu Jona-Lasinio model

2007-06-13

arxiv.org/abs/0706.1823v1

Nucl.Phys.A792:288-305,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages 3 eps figures, To appear in Nucl. Phys. A

Scientific paper

10.1016/j.nuclphysa.2007.06.004

We discuss the lightest scalar resonances, $f_0(600)$, $\kappa(800)$,
$a_0(980)$ and $f_0(980)$ in the extended Nambu Jona-Lasinio model. We find
that the model parameters can be tuned, but unnaturally, to accommodate for
those scalars except the $f_0(980)$. We also discuss problems encountered in
the K Matrix unitarization approximation by using $N_c$ counting technique.

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