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Analysis of New Results For Scalar-Isoscalar pi-pi Phase Shifts

R. Kaminski·L. Lesniak·B. Loiseau
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Abstract

The scalar -- isoscalar pi-pi phase shifts are analysed using a separable potential model of three coupled channels (pipi, KK and an effective 2pi2pi 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 --> pi^+ pi^- n reaction on a polarized target. A relatively narrow (90 -- 180 MeV) scalar resonance f_0(1400-1460) is found, together with a wide f_0(500) (Gamma = 500 MeV) and the narrow f_0(980) state.

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R. Kaminski, L. Lesniak, B. Loiseau. 1997-12-11. Analysis of New Results For Scalar-Isoscalar pi-pi Phase Shifts. https://doi.org/10.1063/1.56096

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