MadGraph5_aMC@NLO

drell yan synatx

Asked by SOUAD SEMLALI

Dear madgraph team,

I am trying to check the background arising from the drell-yan process. Could you please suggest a convenient syntax to generate events for Drell Yan+jets (\mu+ \mu- +jj+ bb), with b-jets being real b's or just mistags?

I tried the following syntax, but I am not sure if this is correct.
generate p p > mu+ mu- j j b b~ /h

Many thanks for any suggestions or help.

Best
Souad

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Olivier Mattelaer
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Olivier Mattelaer (olivier-mattelaer) said : 		#1

Hi,

If you are worried about misstagging you likely need to also add:
> generate p p > mu+ mu- j j j j
 (assuming that p and j does not contain b since you are in 4 flavor scheme)

Now they are probably trick to generate sample more efficiently since from such sample, you would get a lot event that are not b-tag. But since b-tagging is not at our level, I do not have the expertise to comment on that.

Cheers,

Olivier

> On 7 Feb 2023, at 16:50, SOUAD SEMLALI <email address hidden> wrote:
>
> Question #704993 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/704993
>
> Description changed to:
> Dear madgraph team,
>
> I am trying to check the background arising from the drell-yan process.
> Could you please suggest a convenient syntax to generate events for
> Drell Yan+jets (\mu+ \mu- +jj+ bb), with b-jets being real b's or just
> mistags?
>
> I tried the following syntax, but I am not sure if this is correct.
> generate p p > mu+ mu- j j b b~ /h
>
> Many thanks for any suggestions or help.
>
> Best
> Souad
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Revision history for this message
SOUAD SEMLALI (souad-sem) said (last edit ): 		#2

Hi Olivier,

Many thanks for the prompt response. Regarding the first part of your answer, you are suggesting adding p p > mu+ mu- jjjj, then I will be using the following syntax,

generate pp > mu+ mu- j j b b~, for 4-flavor scheme.
add pp > mu+ mu- jjjj

Am I right?

Many thanks for your help.

Best
Souad

Revision history for this message
Olivier Mattelaer (olivier-mattelaer) said : 		#3

the syntax will be
add process p p > w+ w- 4j

Cheers,

Olivier

> On 7 Feb 2023, at 17:10, SOUAD SEMLALI <email address hidden> wrote:
>
> Question #704993 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/704993
>
> SOUAD SEMLALI posted a new comment:
> Hi Olivier,
>
> Many thanks for the prompt response. Regarding the first part of your
> answer, you are suggesting adding p p > mu+ mu- jjjj, then I will be
> using the following syntax,
>
> generate pp > mu+ mu- j j b b~, for 4-flavor scheme.
> add pp > mu+ mu- jjjj
>
> Am I right?
>
> Best
> Souad
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Revision history for this message
SOUAD SEMLALI (souad-sem) said : 		#4

 Sorry, there was a typo in my previous email, but I am a bit confused. Why add process > w+ w- 4j, and not add process p p > mu+ mu- 4j?
am I missing something?

Many thanks for your help.

Best,
Souad

Revision history for this message
Best Olivier Mattelaer (olivier-mattelaer) said : 		#5

Ah sorry I was answering quickly to your email before rushing out of my office,
so I did not double check the final state that you wanted.

Indeed you need
add process p p > mu+ mu- 4j

Cheers,

Olivier

Revision history for this message
SOUAD SEMLALI (souad-sem) said : 		#6

Thank you!

Best
Souad

Revision history for this message
SOUAD SEMLALI (souad-sem) said : 		#7

Thanks Olivier Mattelaer, that solved my question.