FeynCalc manual (development version)

CGS

CGS[p] is transformed into DiracGamma[CartesianMomentum[p]] by FeynCalcInternal.

CGS[p,q, ...] is equivalent to CGS[p].CGS[q].

See also

Overview, GS, DiracGamma.

Examples

CGS[p]

\overline{\gamma }\cdot \overline{p}

CGS[p] // FCI // StandardForm

(*DiracGamma[CartesianMomentum[p]]*)

CGS[p, q, r, s]

\left(\overline{\gamma }\cdot \overline{p}\right).\left(\overline{\gamma }\cdot \overline{q}\right).\left(\overline{\gamma }\cdot \overline{r}\right).\left(\overline{\gamma }\cdot \overline{s}\right)

CGS[p, q, r, s] // StandardForm

(*CGS[p] . CGS[q] . CGS[r] . CGS[s]*)

CGS[q] . (CGS[p] + m) . CGS[q]

\left(\overline{\gamma }\cdot \overline{q}\right).\left(\overline{\gamma }\cdot \overline{p}+m\right).\left(\overline{\gamma }\cdot \overline{q}\right)