Name: Stanislav Date: 04/08/15-11:30:09 PM Z
Okay, several questions have arised…
1. Is there a way to specify my own tensor? Metric and LeviCivita are not enough for me. For example, i’d like this one with lower indices to be specified: phi_mu_nu = diag{0,1,1,0}
Does FeynCalc contract this kind of predefined tensors?
2. When contracting 4 vectors with LeviCivita symbol i get an object like \[Epsilon]^(K2*P1*P2*K1)
I would like either to make this contraction explicit or to replace it with already known expression.
But things like
>>> M = M /. \[Epsilon]^(K2*P1*P2*K1) ->
my_expression
do not work. What’s going on?