Name: Mahdi Sadegh (email_not_shown)
Date: 09/02/17-12:05:39 PM Z


Dear Organizers,
Thanks for your extremely applicable package.
I use DiracTrac to calculate trace of gamma5 with eight four-vectors slash. FeynCalc gives me Levicivita tensor with indices which are name of four-vectors. It doesn't give result with doing all contractions. Even I define my four-vectors with following form
qslash=Contract[GA[\alpha],FourVector[p,\alpha]]
for all of them.
One the result for follwoing calculation
Tr[gamma5slash[p1]slash[p2]slash[p3]slash[p4]slash[p5]slash[p6]slash[p7]slash[p8]]
is
\epsilon^{p1p2p3p4}
instead of
\epsilon^{\alpha1\alpha2\alpha3\alpha4}
p1_{\alpha1}p2_{\alpha2}p3_{\alpha3}p4_{\alpha4}............
I use feyncalc 9.2.0 , mathematica 10 and Macintash 10.12.1
How can solve this problem?



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