Name: Martin Jung Date: 03/05/20-08:56:06 PM Z
Hi,
I have an issue with FeynCalc not being able to simplify an
expression:
the expression reads
Plus[Times[Eps[LorentzIndex[n],LorentzIndex[o],LorentzIndex[p],Momentum[v]],Pair[LorentzIndex[m],Momentum[v]]],Times[-1,Eps[LorentzIndex[m],LorentzIndex[o],LorentzIndex[p],Momentum[v]],Pair[LorentzIndex[n],Momentum[v]]],Times[Eps[LorentzIndex[m],LorentzIndex[n],LorentzIndex[p],Momentum[v]],Pair[LorentzIndex[o],Momentum[v]]],Times[-1,Eps[LorentzIndex[m],LorentzIndex[n],LorentzIndex[o],Momentum[v]],Pair[LorentzIndex[p],Momentum[v]]],Times[Eps[LorentzIndex[m],LorentzIndex[n],LorentzIndex[o],LorentzIndex[p]],Pair[Momentum[v],Momentum[v]]]]
and should be zero (since this is the difference of twice evaluating the
same expression with FeynCalc in two different ways). However, even when
assigning explicit values to the Lorentz indices, I cannot get this
expression to vanish explicitly.
Thanks in advance for your help and sorry, should this be a rookie
mistake (I’ve searched for a long time for a solution before posting).