Instanton effects in the decay of scalar mesons

We show that instanton effects may play a crucial role in the decay of scalar mesons into two pseudoscalars. Particularly the branching ratios of two meson decays of the

f_0(1500)

, which is considered as a glue-ball candidate, are then compatible with an ordinary

q \bar{q}

-structure of this resonance and a small positive SU(3) mixing angle, close to a result recently calculated with the same instanton-induced force.

Note:

9 pages, uuencoded latex including two figures Report-no: Bonn Tk-96-03

scalar meson: hadronic decay
hadronic decay: scalar meson
scalar meson: branching ratio
scalar meson: width
effect: instanton
vertex function: (6quark)
symmetry: SU(3)
mixing angle
quark: relativistic
postulated particle: f0(1500)

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