Analysis of New Results For Scalar-Isoscalar pi-pi Phase Shifts
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 f0(1400-1460) is found, together with a wide f0(500) (Gamma = 500 MeV) and the narrow f0(980) state.
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