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OPE of the energy-momentum tensor correlator in massless QCD

We analytically calculate higher order corrections to coefficient functions of the operator product expansion (OPE) for the Euclidean correlator of two energy-momentum tensors in massless QCD. These are the three-loop contribution to the coefficient C_0 in front of the unity operator O_0=1 and the one and two-loop contributions to the coefficient C_1 in front of the gluon "condensate" operator O_1=-1/4 G^{μν} G_{μν}. For the correlator of two operators O_1 we present the coefficient C_1 at two-loop level.

preprint2014arXivOpen access
M. F. ZollerK. G. Chetyrkin
hep-phhep-th
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M. F. ZollerK. G. Chetyrkin

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