CGA
CGA[i]
can be used as input for γi in 4 dimensions, where i
is a Cartesian index, and is transformed into DiracGamma[CartesianIndex[i]]
by FeynCalcInternal
.
See also
Overview, GA, DiracGamma.
Examples
γi
γi.γj−γj.γi
StandardForm[FCI[CGA[i]]]
(*DiracGamma[CartesianIndex[i]]*)
γi.γj.γk.γl
StandardForm[CGA[i, j, k, l]]
(*CGA[i] . CGA[j] . CGA[k] . CGA[l]*)
DiracSimplify[DiracTrace[CGA[i, j, k, l]]]
4δˉilδˉjk−4δˉikδˉjl+4δˉijδˉkl
CGA[i] . (CGS[p] + m) . CGA[j]
γi.(γ⋅p+m).γj