Mesons of the $f_0$-family in the processes $ππ\toππ,K\bar{K},ηη$ up to 1.9 GeV

Details Mesons of the $f_0$-family in the processes $ππ\toππ,K\bar{K},ηη$ up to 1.9 GeV Mesons of the $f_0$-family in the processes $ππ\toππ,K\bar{K},ηη$ up to 1.9 GeV

2003-06-21

arxiv.org/abs/hep-ph/0306196v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, LaTex; Talk at the XVI Int'l Baldin Seminar on High Energy Physics Problems "Relativistic Nuclear Physics and Quantum

Scientific paper

In combined 2- and 3-channel analyses of experimental data on the coupled processes $\pi\pi\to\pi\pi,K\bar{K},\eta\eta$ in the channel with $I^GJ^{PC}=0^+0^{++}$, various scenarios of these reactions(with different numbers of resonances) are considered. In a model-independent approach, confirmation of the $\sigma$-meson below 1 GeV and definite indications of the QCD nature of other $f_0$ resonances are obtained. The conclusion on the linear realization of chiral symmetry is drawn.

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