Name: Pierre Artoisenet Date: 12/02/05-05:16:40 PM Z
I’m a brand new user of FeynCalc, so my question is probably simple to
answer.
I have the following problem. I define a four vector as
FourVector[t,alpha]=expr, (1)
where expr is a complicated expression containing Levi Civita tensors (with at least 3 contracted indeces). When I square this four vector using
Contract[FourVector[t,alpha],FourVector[t,alpha]]
the result is an expression where most of the Levi Civita tensors with an index alpha are not contracted.
How can I contract these tensors ?
Do I use the correct way in (1) to store a four vector under the name t
?
Thanks.