2002/03/31 by Yu. S. Surovtsev, D. Krupa, M. Nagy
Physics and Astronomy · #hep-ph
published as Eur.Phys.J. A15 (2002) 409-416 · 13 pages, LaTex; Talk given at the Int'l Workshop on Chiral Fluctuations in Hadronic Matter, IPN Orsay, France, 26-28 Sept. 2001 and at the Triangle Seminar on Particle Physics, Vienne, Austria, 30 Nov.-1 Dec. 2001
arxiv created 2002/03/31 · arxiv updated 2009/11/30
In a combined analysis of the experimental data on the coupled processes ππ→ππ,KK in the channel with IGJPC=0+0++, the various scenarios of these reactions (with different numbers of resonances) are considered. In a model-independent approach, based only on analyticity and unitarity, a resonance is represented by of a pole cluster (poles on the Riemann surface) of the definite type that is defined by the state nature. The best scenario contains the resonances f0(665) (with properties of the σ-meson), f0(980) (with a dominant s s component), f0(1500) (with a dominant flavour-singlet, \it e.g., glueball component) and the f0(1710) (with a considerable s s component). If the f0(1370) exists, it has a dominant s s component. The coupling constants of observed states with the considered channels and the ππ and KK scattering lengths are obtained. The conclusion on the linear realization of chiral symmetry is drawn.