A Real Example: $e^- e^+ \rightarrow Z Z H$

In this subsection, in order to be more precise, we review the techniques used in Quantum Field Theory in a non trivial example, the Higgs boson production at a linear collider through the process $e^- e^+ \rightarrow Z Z H$. The emphasis is in the use of the package FeynCalc for mathematica and both the trace techniques and the helicity amplitudes method are discussed. The discussion can be found here.