QCD field strength correlator at the next-to-leading order
نویسندگان
چکیده
The gauge invariant two-point correlation function of the gauge field strength tensor is calculated in perturbation theory at the next-to-leading order. Besides a direct calculation in perturbative QCD we also present a derivation of the correlation function in the heavy quark effective theory. Our results are briefly compared with 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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