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arXiv · 0804.3450

Review of Scalar Mesons

D. V. Bugg
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Abstract

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.

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D. V. Bugg. 2008-04-22. Review of Scalar Mesons. https://doi.org/10.1063/1.2973538

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