N. N. Achasov, A. V. Kiselev, G. N. Shestakov
Published 2008-06-03Version 1
Outline: 1. Introduction, 2. Confinement, chiral dynamics and light scalar mesons, 3. Chiral shielding of the \sigma(600), chiral constraints (the CGL band), the \sigma(600) and the f0(980) in \pi\pi->\pi\pi, \pi\pi->KKbar, \phi->\gamma\pi0\pi0, 4. The \phi meson radiative decays on light scalar resonances, 5. Light scalars in \gamma\gamma collisions. Evidence for four-quark components of light scalars is given. The priority of Quantum Field Theory in revealing the light scalar mystery is emphasized.
Comments: Plenary talk given by N.N. Achasov at PHIPSI08, Frascati, April 9, 2008. In spite of allegations in the papers arXiv:0806.0328 (M.R. Pennington) and arXiv:0803.3389 (M.R. Pennington et al.), the model of PRD 77 (2008) 074020 (N.N. Achasov, G.N. Shestakov) reproduces \gamma\gamma->\pi0\pi0 above 800 MeV (see Sec. V, Fig. 5, in PRD and Sec. 20, Fig. 9, in this talk)
Journal: Nucl.Phys.Proc.Suppl.181-182:169-174,2008
Light Scalar Mesons from Phi to Psi
Problem of Light Scalar Mesons
Chiral dynamics of many-pion systems
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