Gluon Condensate from Superconvergent QCD Sum Rule

Details Gluon Condensate from Superconvergent QCD Sum Rule Gluon Condensate from Superconvergent QCD Sum Rule

1999-03-23

arxiv.org/abs/hep-ph/9903457v1

Phys.Rept. 320 (1999) 287-293

Physics

High Energy Physics

High Energy Physics - Phenomenology

plain TeX, no figures

Scientific paper

10.1016/S0370-1573(99)00079-4

Sum rules for the nonperturbative piece of correlators (specifically, the vector current correlator) are discussed. The sum rule subtracting the perturbative part is of the superconvergent type. Thus it is dominated by the bound states and low energy production cross section. It leads to a determination of the gluon condensate of $<\alpha_s G^2> = 0.048 \pm 0.039 GeV^4$

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