DiracSubstitute5
DiracSubstitute5[exp] rewrites γ5 in terms of the chirality projectors γ6 and γ7. DiracSubstitute5
is also an option of various FeynCalc functions that handle Dirac algebra.
See also
Overview, DiracSubstitute67, DiracGamma, ToDiracGamma67.
Examples
GA[5]
DiracSubstitute5[%]
γˉ5
γˉ6−γˉ7
SpinorUBar[Subscript[p, 1]] . GA[\[Mu]] . GA[5] . GA[\[Nu]] . SpinorU[Subscript[p, 2]]
DiracSubstitute5[%]
uˉ(p1).γˉμ.γˉ5.γˉν.u(p2)
(φ(p1)).γˉμ.(γˉ6−γˉ7).γˉν.(φ(p2))