Gluon propagator in a new perturbative expansion of Quantum Chromodynamics with a non-perturbative background

Using a new perturbative expansion method in Quantum Chromodynamics with a non-perturbative gluon background, the gluon propagator is calculated up to the one-loop level, and renormalized in the modified minimal subtraction scheme. The resultant renormalization constants of the quantum gluon field and the gauge parameter receive a non-perturbative contribution coming from the gluon condensate <FF> besides the usual perturbative one, respectively. Supported by the National Natural Science Foundation of China Wang Wenyu: born in 1973, Graduate student