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.
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