Name: Vladyslav Shtabovenko (email_not_shown)
Date: 03/26/16-06:10:02 PM Z


Hi,

Am 25.03.2016 um 17:00 schrieb Xing-Bo Yuan:
> Hi,
>
> Thank you for the detailed explanation.
>
> 1. “I would suggest that you use unpatched FeynArts + FeynRules on a separate Mathematica kernel, then save the results and load them into the FeynCalc session, where you can process them further. “
>
> In fact, that's what I did recently.
>
>
> 2. Now, I generate the amplitude in unpatched FeynArts and save it in a file. Then, I load the file in FeynRules. The next step is to convert the amplitude to the form required by FeynCalc. As explained in 1601.01167, I choose the function FCFAConvert[]. However, the function doesn’t work, except using the following commands first:
>
> amp=amp/.{FeynAmpList -> FAFeynAmpList, NonCommutative -> FANonCommutative,
> DiracSpinor -> FADiracSpinor};
> FCFAConvert[amp]
>
> I guess FCFAConvert[] only works for amplitudes generated by patched FeynArts. If so, is it possible to make FCFAConvert[] work for the amplitudes generated by unlatched FeynArts?
>

Correct. In fact, I haven't thought of the possibility that someone
would use FCFAConvert[] for unpatched FeynArts. However, this shouldn't
be difficult to fix.

I don't use FeynRules, so it would be nice if you could send me some
examples of code to which you are applying FCFAConvert. This way I could
it test it a bit, before pushing the changes in the repo.

Cheers,
Vladyslav

>
> Best,
> Xing-Bo Yuan
>



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