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Quark Effects in the Gluon Condensate Contribution to the Scalar Glueball Correlation Function

D. Harnett·T. G. Steele
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Abstract

One-loop quark contributions to the dimension-four gluon condensate term in the operator product expansion (OPE) of the scalar glueball correlation function are calculated in the MS-bar scheme in the chiral limit of $n_f$ quark flavours. The presence of quark effects is shown not to alter the cancellation of infrared (IR) singularities in the gluon condensate OPE coefficients. The dimension-four gluonic condensate term represents the leading power corrections to the scalar glueball correlator and, therein, the one-loop logarithmic contributions provide the most important condensate contribution to those QCD sum-rules independent of the low-energy theorem (the subtracted sum-rules).

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D. Harnett, T. G. Steele. 2004-10-28. Quark Effects in the Gluon Condensate Contribution to the Scalar Glueball Correlation Function. https://doi.org/10.1088/1126-6708%2F2004%2F12%2F037

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