DCHN[x, i, j]
is a chain of Dirac matrices x and is transformed into DiracChain[FCI[x],DiracIndex[i],DiracIndex[j]]
by FeynCalcInternal
.
Overview, DiracChain, DCHN, DiracIndex, DiracIndexDelta, DiracChainJoin, DiracChainExpand, DiracChainFactor.
A standalone Dirac matrix with open Dirac indices
[GAD[\[Mu]], i, j] DCHN
A chain of Dirac matrices with open Dirac indices
[GAD[\[Mu]] . GAD[\[Nu]], i, j] DCHN
A single spinor with an open Dirac index
[SpinorUBar[p, m], i] DCHN
A single spinor with an open Dirac index
[SpinorVBar[p, m], i] DCHN
A single spinor with an open Dirac index
[i, SpinorU[p, m]] DCHN
A single spinor with an open Dirac index
[i, SpinorV[p, m]] DCHN
spinor contracted with a chain of Dirac matrices
[GAD[\[Mu]] . GAD[\[Nu]], SpinorUBar[p, m], j] DCHN
spinor contracted with a chain of Dirac matrices
[GAD[\[Mu]] . GAD[\[Nu]], SpinorVBar[p, m], j] DCHN
spinor contracted with a chain of Dirac matrices
[GAD[\[Mu]] . GAD[\[Nu]], i, SpinorU[p, m]] DCHN
spinor contracted with a chain of Dirac matrices
[GAD[\[Mu]] . GAD[\[Nu]], i, SpinorV[p, m]] DCHN