Hello All!
Could you explain this strange result:
I was trying to calculate the trace
Tr[(m+DiracSlash[k1]).DiracMatrix[6].DiracMatrix[ComplexIndex[mu]].
(m+DiracSlash[k2]).DiracMatrix[mu].DiracMatrix[7]]
and I've obtained
2 (\[ImaginaryI] Eps[LorentzIndex[mu], LorentzIndex[ComplexIndex[mu]],
Momentum[k1], Momentum[k2]] +
Pair[LorentzIndex[mu], Momentum[k2]] Pair[
LorentzIndex[ComplexIndex[mu]], Momentum[k1]] +
Pair[LorentzIndex[mu], Momentum[k1]] Pair[
LorentzIndex[ComplexIndex[mu]], Momentum[k2]] -
Pair[LorentzIndex[mu], LorentzIndex[ComplexIndex[mu]]] Pair[
Momentum[k1], Momentum[k2]])
What does the first term mean?
Eps[LorentzIndex[mu], LorentzIndex[ComplexIndex[mu]],Momentum[k1],
Momentum[k2]])
Why momenta k1 and k2 appeared in the indexes of LeviCivita?
It's not correct.
Thank you in advance for the help.
Timur
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