1-loop QCD correction for e-p collide

Asked by Xiang Lv on 2019-10-21

Could Madgraph calculate 1-loop QCD correction for e-p collide, such as e u -> e higgs u [QCD]?
We encounter a problem like this when calculate the processes:
Command "generate e p > e u [QCD]" interrupted with error: InvalidCmd : No particle e in model.
Thanks very much for helping!

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Last query:
2019-10-21
Last reply:
2019-10-21

Hi,

1) Deep Inelastic is indeed not supported.
2) Your error is not related to that
"e" is not a particle defined in the model.
(You can use e- or e+)
if you want to use either "e-" or "e+"
you should use
define e = e+ e-

3) @NLO, you should not specify a specific quark flavor "u", you should use "j" or "p"
So if deep inelastic was supported the correct syntax would have been
define e = e+ e-
generate p e > e j [QCD]
output
launch

(Here the launch will fail within some pole check since our substraction method does not support deep inelastic scattering)

Cheers,

Olivier

> On 21 Oct 2019, at 10:32, Xiang Lv <email address hidden> wrote:
>
> New question #685300 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/685300
>
> Could Madgraph calculate 1-loop QCD correction for e-p collide, such as e u -> e higgs u [QCD]?
> We encounter a problem like this when calculate the processes:
> Command "generate e p > e u [QCD]" interrupted with error: InvalidCmd : No particle e in model.
> Thanks very much for helping!
>
>
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Xiang Lv (xiang123) said : #2

OK. I got it! Thank you very much!

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