Instanton Effects on the Role of the Low-Energy Theorem for the Scalar Gluonic Correlation Function
D. Harnett, T. G. Steele, V. Elias
Abstract
Instanton contributions to the Laplace sum-rules for correlation functions of scalar gluonic currents are calculated. The role of the constant low-energy theorem term, whose substantial contribution is unique to the leading Laplace sum-rule L-1, is shown to be diminished by instanton contributions, significantly increasing the resulting mass bounds for the ground state of scalar gluonium and improving compatibility with results from higher-weight sum-rules.
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