Name: V. Shtabovenko Date: 07/06/20-12:06:47 PM Z


Dear Francesco,

judging from

>> In order to make the option paint work I had to use both my new .mod .gen and setting the option SetOptions[FourVector, FeynCalcInternal -> False];
>>

I think that you are missing

FAPatch[PatchModelsOnly -> True];

cf. e.g.

https://feyncalc.github.io/FeynCalcExamplesMD/Phi3/OneLoop/Renormalization

Cheers,
Vladyslav

Am 06.07.20 um 11:56 schrieb Francesco:
> Dear all,
>
> I am new to FeynCalc and I want to use it to calculate NLO cross section for new Physics. I have my .fr rules which I used to generate UFO and FeynArts model files. Now I need to do something analytically.
>
> In order to make the option paint work I had to use both my new .mod .gen and setting the option SetOptions[FourVector, FeynCalcInternal -> False];
>
> In my model the SM is embedded so I was learning and testing it with some know process like qg->qg scattering at LO (https://feyncalc.github.io/FeynCalcExamplesMD/QCD/Tree/QGl-QGl).
>
> I can draw the diagrams but when it comes to calculate the amplitude I get this error:
>
> SharedObjects::failmsg: Error! FeynCalc has encountered a fatal problem and must abort the computation. The problem reads: SUNFIndex is not allowed inside SUNIndex
>
> What am I missing? what do I have to change so that the contraction works?
>
> Thanks a lot,
> Francesco.
>