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Instantons and Glueballs

H. Forkel
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Abstract

We investigate the impact of instantons on scalar glueball properties in a largely model-independent analytical approach based on the instanton-improved operator product expansion (IOPE) of the $0^{++}$ glueball correlator. The instanton contributions turn out to be dominant, to substantially improve the consistency of the correponding QCD sum rules, and to increase the glueball residue about fivefold.

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H. Forkel. 2001-03-19. Instantons and Glueballs. https://arxiv.org/abs/hep-ph/0103204

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