# the meaning of feynman diagrams of SMEFTatNLO

Hi experts:

These days, I am using the model SMEFTatNLO-NLO to draw some Feynman diagrams and extract Wilson coefficients.

here is my command in Madgraph:

```

import model SMEFTatNLO-NLO

generate g g > z z QCD=2 QED=2 NP=2 NP^2==2 [noborn=QCD]

```

Then I got 132 diagrams here: https:/

Is there a way to find out which diagram is corresponding to Operator cpt or ctp or something else?

I also found Diagram 57 and Diagram 59 are identical. I think there is something different on them, right?

That's really appreciated!

Cheers,

Yingjie

## Question information

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> Is there a way to find out which diagram is corresponding to Operator cpt or ctp or something else?

The easiest is to modify the model to add additional coupling order such that such information will be displayed.

Otherwise this is quite complex.

> I think there is something different on them, right?

Yes, likely a different lorentz structure or coupling.

Cheers,

Olivier

> On 27 Apr 2021, at 10:30, Yingjie Wei <email address hidden> wrote:

>

> New question #696779 on MadGraph5_aMC@NLO:

> https:/

>

> Hi experts:

>

> These days, I am using the model SMEFTatNLO-NLO to draw some Feynman diagrams and extract Wilson coefficients.

>

> here is my command in Madgraph:

>

> ```

> import model SMEFTatNLO-NLO

> generate g g > z z QCD=2 QED=2 NP=2 NP^2==2 [noborn=QCD]

> ```

>

> Then I got 132 diagrams here: https:/

>

> Is there a way to find out which diagram is corresponding to Operator cpt or ctp or something else?

>

> I also found Diagram 57 and Diagram 59 are identical. I think there is something different on them, right?

>

> That's really appreciated!

>

> Cheers,

> Yingjie

>

>

>

>

> --

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> contact for MadGraph5_aMC@NLO.

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