Review of Scalar Mesons
Abstract
Description
The formulae needed to parametrise sigma, kappa, a0(980) and f0(980) are reviewed. For sigma and kappa, the Adler zero due to Chiral Symmetry Breaking plays a crucial role. The f0(980) and a0(980) are locked to the KK threshold by a cusp mechanism which leads to a sharp peak in attraction at the threshold. This mechanism may play a wider role. A novel suggestion is that the confinement potential involves a cooperative effect between QCD effects (coloured quarks and gluons) and conventional meson exchanges.
10 pages. Proc. Lisbon meeting on Scalar Mesons, Feb 10-16
10 pages. Proc. Lisbon meeting on Scalar Mesons, Feb 10-16