Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-07-17
Phys.Lett.B413:130-136,1997
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 Latex pages + 6 postscript figures
Scientific paper
10.1016/S0370-2693(97)01090-3
New solutions on the scalar -- isoscalar $\pi\pi$ phase shifts are analysed together with previous $K\bar{K}$ results using a separable potential model of three coupled channels ($\pi\pi$, $K\bar{K}$ and an effective $2\pi 2\pi$ system). Model parameters are fitted to two sets of solutions obtained in a recent analysis of the CERN-Cracow-Munich measurements of the $\pi^- p_{\uparrow} \to \pi^+ \pi^- n$ reaction on a polarized target. A relatively narrow (90 -- 180 MeV) scalar resonance $f_0(1400-1460)$ is found, in contrast to a much broader ($\Gamma \approx 500$ MeV) state emerging from the analysis of previous unpolarized target data.
Kaminski Robert
Lesniak Leonard
Loiseau Benoit
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