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We systematically reconsider, within an improved “analytic K-matrix model”, the extraction of the σ≡f0(600) and f0(980) masses, widths and hadronic couplings using new Ke4≡K→ππeνe data on ππ phase shift below 390 MeV and different sets of ππ→ππ/KK¯ scatterings data from 400 MeV to 1.4 GeV. Our results are summarized in Tables 1, 2 and 5. In units of MeV, the complex poles are: Mσ=452(12)−i260(15)...
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