Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-04-17
J.Phys.G28:R249-R267,2002
Physics
High Energy Physics
High Energy Physics - Phenomenology
34 pages in Latex, minor improvements in sec 6
Scientific paper
10.1088/0954-3899/28/10/201
We show that two nonets and a glueball provide a consistent description of data on scalar mesons below 1.7 GeV. Above 1 GeV the states form a conventional (q bar q) nonet mixed with the glueball of lattice QCD. Below 1 GeV the states also form a nonet, as implied by the attractive forces of QCD, but of more complicated nature. Near the center they are 4 quark states of the Jaffe type in S-wave, with some (q bar q) in P-wave, but further out they rearrange in colour to two colourless (q bar q) pairs and finally as meson-meson states. A simple effective chiral model for such a system with two scalar nonets can be made involving two coupled linear sigma models. One of these could be looked upon as the Higgs sector of nonpertubative QCD.
Close Frank E.
Törnqvist Nils A.
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