Name: Vladyslav Shtabovenko Date: 04/07/16-09:50:52 PM Z
Hi Xing-Bo,
thanks for the detailed example. Your idea to provide a function to
patch the model is actually very good. I need to improve the
corresponding code to make it a bit more user friendly and universal,
but this shouldn’t take too much time.
Cheers,
Vladyslav
Am 05.04.2016 um 20:36 schrieb Xing-Bo Yuan:
> Hi Vladyslav,
>
> I am sorry for so late reply.
>
> “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. “
>
> Thank you for the explanation.
>
> I have seen many people use FeynCalc to perform calculation on BSM
models. An usual roadmap is FeynRules->FeynArts->FeynCalc, i.e. using
FeynRules to generate FeynArts model file, then generate amplitude in
FeynArts, finally the analytical calculation is performed in
FeynCalc.
>
> Now, the situation is that, the unpatched FeynArts can directly read
the model file generated by FeynRules, but the patched FeynArts, which
is installed with FeynCalc, can not.
>
> Your suggestion is to generate amplitude in unpatched FeynArts, then
load it in FeynCalc. It’s also what I currently used. In this approach,
one need change some functions by hand. Please find the files in the
following link.
> https://www.dropbox.com/s/qwlhxruzqgzvcbo/Archive.zip?dl=0
> I give few sample examples which you asked for. Hope you can update
FCFAConvert[] to apply for the amplitude generated by unpatched
FeynArts.
>
> In addition, I have another suggestion to solve the current problem.
In FeynCalc, if there is a function to patch the model file generated by
FeynRules, then people can easily use the patched FeynArts. In fact, I
think there already exists such a function. Because, when installing
FeynCalc and patching FeynArts, the model files in
./FeynCalc/FeynArts/Models/ are automatically patched.
>
> Thank you again for your time.
>
> Best Regards,
> Xing-Bo Yuan
>