On the nature of f₀ mesons below 1.9 GeV and lower scalar nonets
Surovtsev, Yu. S. · Krupa, D. · Nagy, M.
Original · EN
The combined 3-channel analysis of experimental data on the coupled processes ππ→ππ,KK,ηη is carried out in the channel with the vacuum quantum numbers. An approach, using only first principles (analyticity and unitarity) and the uniformizing variable, is applied. Definite indications of the QCD nature of the f₀ resonances below 1.9 GeV are obtained, among them a surprising indication for f₀(980) to be the ηη bound state. An assignment of the scalar mesons below 1.9 GeV to lower nonets is proposed.
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