Name: Rolf Mertig Date: 05/02/11-06:43:18 PM Z
Hi,
I just uploaded a new version of FeynCalc. It fixes your problem.
Please be careful: I have not tested this version very much.
Rolf
rolfm@gluon:~$ math
Mathematica 8.0 for Linux x86 (64-bit)
Copyright 1988-2011 Wolfram Research, Inc.
In[1]:= <<HighEnergyPhysics`fc`
Loading FeynCalc from /home/rolfm/HighEnergyPhysics
FeynCalc 8.0.0.beta2 Type ?FeynCalc for help or visit
http://www.feyncalc.org/
$PrePrint is set to FeynCalcForm. Use FI and FC to change the display
format.
Loading FeynArts, see www.feynarts.de for documentation
FeynArts 3.4 patched for use with FeynCalc
In[2]:= FI; Tr[(GSD[p] + m).GAD[\[Mu]].(GSD[q] - m).GAD[\[Nu]]]
Out[2]=
4*(-(m^2*Pair[LorentzIndex[\[Mu], D],
LorentzIndex[\[Nu], D]]) +
Pair[LorentzIndex[\[Mu], D], Momentum[q,
D]]*Pair[LorentzIndex[\[Nu], D],
Momentum[p, D]] +
Pair[LorentzIndex[\[Mu], D], Momentum[p,
D]]*
Pair[LorentzIndex[\[Nu], D], Momentum[q,
D]] -
Pair[LorentzIndex[\[Mu], D],
LorentzIndex[\[Nu], D]]*
Pair[Momentum[p, D], Momentum[q, D]])
In[3]:= FCE@%
Out[3]=
4*(FVD[p, \[Nu]]*FVD[q, \[Mu]] +
FVD[p, \[Mu]]*FVD[q, \[Nu]] -
m^2*MTD[\[Mu], \[Nu]] -
MTD[\[Mu], \[Nu]]*SPD[p, q])
In[4]:= Tr[GA[a]]
Out[4]= 0