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

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

1997-12-11

arxiv.org/abs/hep-ph/9712337v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 3 figures. Talk given at 7th International Conference on Hadron Spectroscopy (Hadron 97), Upton, NY, 25-30 Aug 1997

Scientific paper

10.1063/1.56096

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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