Name: Sanisnack (email_not_shown)
Date: 08/13/02-03:38:48 PM Z


Hi,
Could you help me? I'd like to understand the way I can traslate SM or SMQCD amplitudes from FeynArts to FaynCalc format to continue the calculation.

Maibe some setteing (that I have not undestand) is required to work using the general model "Lorentz" and models SM or SMQCD.

1) I have unpacked the last version of FeynCalc and FeynArts3 in the right places

2) I loaded the packages

$LoadPhi=True;
$LoadFeynArts=True;
<<"HighEnergyPhysics`FeynCalc`"

and processed the pach

3) I tried to evaluate:

In[4]:=
tt=CreateTopologies[0,2\[Rule]2];

In[6]:=
aa=InsertFields[tt,{F[2,{1}],-F[2,{1}]}\[Rule]{F[2,{2}],-F[2,{2}]},
ExcludeParticles\[Rule]{V[2],V[3],
S[_]},InsertionLevel\[Rule]Classes, Model\[Rule]"SM"];

>From In[6]:=
\!\(\*FormBox[
  RowBox[{\(InitializeModel::"incomp2"\), \(\(:\)\(\ \)\),
"\<\"Incompatible \
index structure in classes coupling \\!

.....

\\0\\) indices, not \\!\\(TraditionalForm\\1\\).\"\>"}],
TraditionalForm]\)

Out[6]=
\!\(TraditionalForm\$Aborted\)

What is wrong or missing?
Is there any
a) command
b) setting or
c) sub-package
to insert SM or QCDSM fields in the topology and continue calculation?

Thank you very much for the time yuo will spend to answer
Best Regards
Francesco Tramontano



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