Gluino covariant derivative

You can find the Lagrangian used here:
http://feynrules.irmp.ucl.ac.be/attachment/wiki/MSSM/mssm.fr
If that does not solve your issue, you can contact the author of the model.

Cheers,

Olivier

> On 11 Mar 2017, at 12:28, Sergey Ivanov <email address hidden> wrote:
>
> New question #555771 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/555771
>
> Hi,
>
> I'm playing with preinstalled mssm model and I realize that don't understand how P.go,P.go,P.g (V_57) and P.g,P.g,P.g,P.g (V_11) vertices were implemented there
>
> 1) I use the following conventions for QCD and gluino lagrangians:
> https://latex.codecogs.com/gif.latex?\begin{aligned}&space;&&space;\mathcal{L}_{1}=ig_{s}\bar{\lambda}^a&space;\gamma^{\mu}&space;f^{abc}&space;G^{b}_{\mu}\lambda^c&space;\\&space;&&space;\mathcal{L}_{2}=-g_{s}&space;\partial_{\mu}G_{\nu}^{a}G_{\mu}^{b}G_{\nu}^{c}f^{abc}&space;\\&space;\end{aligned}
>
> 2) Multiplying the second one by i and substituting partial derivative by corresponding momentum (i*p as all of the particles are considered outgoing) I get exactly the same V_11 as in model files.
>
> 3) The same algorithm doesn't work for V_57 and I don't understand why. What I get is:
>
> https://latex.codecogs.com/gif.latex?\begin{aligned}&space;&&space;\mathcal{L}_{2}=ig_{s}\bar{\lambda}^a&space;\gamma^{\mu}&space;f^{abc}&space;G^{b}_{\mu}\lambda^c&space;\\&space;&&space;i\mathcal{L}_{2}=-g_{s}\bar{\lambda}^{a_1}&space;\gamma^{\mu}\lambda^{a_2}&space;G^{a_3}_{\mu}&space;f^{a_3&space;a_2&space;a_1}\\&space;\end{aligned}
>
> and so -G (instead of G) should be in GC_8.
>
> Where am I wrong?
>
> P.S. I'm a novice in Madgraph, so sorry if this question is really stupid.
>
> --
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> contact for MadGraph5_aMC@NLO.

Ok, thanks!

Cheers