Closed vollous closed 3 years ago
Most likely you forgot to patch the model
FAPatch[PatchModelsOnly -> True]
Hi, still not working.
Only by running CreateFeynAmp[decay]
I get
FAFeynAmp(GraphID(Topology==1,Generic==1,Particles==1,Number==1),Integral[q1], (...) PropagatorDenominator(k1+k2-(q1),MH Sqrt[Subscript[\[Xi], S(Gen5)]]))
With no FeynAmpDenominator
attached to it.
I checked and I have the same version of FeynArts
in the stand-alone package and in the patched package (FeynCalc)
If the model is located not in FeynArts/Models, FAPatch needs to have the full directory path
FAPatch[PatchModelsOnly -> True,
FAModelsDirectory ->
FileNameJoin[{NotebookDirectory[], "MyModelDir"}]]
Upon patching, the output of CreateFeynAmp should not contain any PropagatorDenominator
symbols, only
FAPropagatorDenominator
may appear instead. So in your case it seems that the model still didn't get patched
correctly.
That did the trick! Thank you!
12.1.1
9.3.1
Yes
and
SetOptions[FourVector, FeynCalcInternal -> False];
I am working on an extension of the standard model. My model was designed in FeynRules and now I am using FeynCalc patched with FeynArts. I have an additional complex field that couples with the Higgs.
Here is one of the diagrams.
When I generate the ampltide with:
I get these terms:
(...) PropagatorDenominator(k1+k2-q,MH Sqrt[Subscript[\[Xi], S(Gen5)]])
After consulting the documentation I found that the PropagatorDenominator need to be used withFeynAmpDenominator
And because of this I cant convert the amplitudes to the Passarino Veltman basis.
An additional note that might be important. When I calculate the amplitudes with just FeynArts I dont get the
Subscript[\[Xi]
term. The amplitude is something like:(...) PropagatorDenominator(k1+k2-q,MH)
Thank you for the help!