Symmetric point 4-point functions at one loop in QCD

Understand

We evaluate the quartic ghost and quark Green's functions as well as the gluon-ghost, gluon-quark and ghost-quark 4-point functions of Quantum Chromodynamics at one loop at the fully symmetric point in a linear covariant gauge.

• Similar expressions for the analogous Green's functions in Quantum Electrodynamics are also provided.