Light Scalars in Field Theory
Abstract
Description
Outline: 1. Introduction, 2. Confinement, chiral dynamics and light scalar mesons, 3. Chiral shielding of σ(600), chiral constraints, σ(600), f_0(980) and their mixing in ππ\toππ, ππ\to K\bar K, and ϕ\toγ\pi0\pi0, 4. The ϕmeson radiative decays on light scalar resonances. 5. Why a0(980) and f0(980) are not the K\bar K molecules. 6. Light scalars in γγcollisions.
Evidence for four-quark components of light scalars is given. The priority of Quantum Field Theory in revealing the light scalar mystery is emphasized.
9 pages, 8 figures, Invited talk at QUARKS'2008, Sergiev Posad, Russia, May 23-29, 2008
9 pages, 8 figures, Invited talk at QUARKS'2008, Sergiev Posad, Russia, May 23-29, 2008