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Instanton Effects on the Role of the Low-Energy Theorem for the Scalar Gluonic Correlation Function

D. Harnett·T. G. Steele·V. Elias
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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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D. Harnett, T. G. Steele, V. Elias. 2003-01-05. Instanton Effects on the Role of the Low-Energy Theorem for the Scalar Gluonic Correlation Function. https://doi.org/10.1016/s0375-9474(00)00567-4

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