QCD sum rule analysis of the field strength correlator
نویسنده
چکیده
The gauge invariant two-point correlator for the gluon field strength tensor is analysed by means of the QCD sum rule method. To this end, we make use of a relation of this correlator to a two-point function for a quark-gluon hybrid in the limit of the quark mass going to infinity. From the sum rules a relation between the gluon correlation length and the gluon condensate is obtained. We briefly compare our results to recent determinations of the field strength correlator on the lattice. PACS numbers: 14.70.Dj, 12.38.Bx, 11.10.Gh, 12.40.Ee
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تاریخ انتشار 1998