GluonSelfEnergy
GluonSelfEnergy[{mu, a}, {nu, b}]
yields the 1-loop gluon self-energy.
See also
Overview, GluonPropagator, GluonGhostVertex, GluonVertex, GhostPropagator.
Examples
GluonSelfEnergy[{\[Mu], a}, {\[Nu], b}, Momentum -> p]
21i(3ε20−962)CAgs2δab(pμpν−p2gμν)+i(920−3ε8)Tfgs2δab(pμpν−p2gμν)
GluonSelfEnergy[{\[Mu], a}, {\[Nu], b}, Gauge -> \[Xi], Momentum -> q]
21iCA(ε2(313−ξ)−21(1−ξ)2+2(1−ξ)−962)gs2δab(qμqν−q2gμν)+i(920−3ε8)Tfgs2δab(qμqν−q2gμν)