ee -> enu emu and output root file

Asked by Kristin Lohwasser

Dear all,

I am trying to generate
ee -> WW -> enu munu (with/without anomalous couplings) and I am trying to find out, whether I am in principle setup correctly.

1) import model sm / Dim6 (depending on whether it is supposed to be SM or aTGCs)

actual process:
generate e+ e- > e+ ve mu- vm~

I do not want to run the shower (and this is all just leptons and the lpp1=0 is set), but I am running this at LO, so I suppose, that is ok (except if this introduces non-convergence of the process or so?)

It seems, that some of the events look like single W events (i.e. mass of one of the electron of 7 TeV), which seems odd.
In principle, I want to look for the ee > WW process, where the WW decay leptonically in different flavours (electron or muon). So I started being suspicious and I wanted to make sure, I am not doing something grossly wrong.

2) I get the following output files and I wondering, if it is correct to be using unweighted_events.root for anlaysis of event (e.g. kinematic distributions etc)

run_01_tag_1_banner.txt
unweighted_events.root
events.lhe.gz
unweighted_events.lhe.gz

Question information

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English Edit question
Status:
Solved
For:
MadGraph5_aMC@NLO Edit question
Assignee:
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Solved by:
Olivier Mattelaer
Solved:
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Last reply:
Revision history for this message
Kristin Lohwasser (kristin-lohwasser) said :
#1

thanks & Best
Kristin

Revision history for this message
Olivier Mattelaer (olivier-mattelaer) said :
#2

Hi,

> actual process:
> generate e+ e- > e+ ve mu- vm~

This is perfect. It indeed includes the diagrams without any resonant W and those with one single resonance.
Just look at the Feynman diagram generated.

If you want to restrict your self to two on shell W, you can do
generate e+ e- > w+ w-, w+ > e+ ve, w- > mu- vm~

More details on the various syntax are presented in the following tutorial:
https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/MGTalks/13_06_10_tutomg_tasi.pdf
or in the following paper:
arXiv:1307.1347

Cheers,

Olivier

On 26 Sep 2015, at 14:02, Kristin Lohwasser <email address hidden> wrote:

> New question #271802 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/271802
>
> Dear all,
>
> I am trying to generate
> ee -> WW -> enu munu (with/without anomalous couplings) and I am trying to find out, whether I am in principle setup correctly.
>
> 1) import model sm / Dim6 (depending on whether it is supposed to be SM or aTGCs)
>
> actual process:
> generate e+ e- > e+ ve mu- vm~
>
> I do not want to run the shower (and this is all just leptons and the lpp1=0 is set), but I am running this at LO, so I suppose, that is ok (except if this introduces non-convergence of the process or so?)
>
> It seems, that some of the events look like single W events (i.e. mass of one of the electron of 7 TeV), which seems odd.
> In principle, I want to look for the ee > WW process, where the WW decay leptonically in different flavours (electron or muon). So I started being suspicious and I wanted to make sure, I am not doing something grossly wrong.
>
> 2) I get the following output files and I wondering, if it is correct to be using unweighted_events.root for anlaysis of event (e.g. kinematic distributions etc)
>
> run_01_tag_1_banner.txt
> unweighted_events.root
> events.lhe.gz
> unweighted_events.lhe.gz
>
>
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Revision history for this message
Kristin Lohwasser (kristin-lohwasser) said :
#3

Thanks very much!!!!!

I still am wondering about:

2) I get the following output files and I wondering, if it is correct to be using unweighted_events.root for anlaysis of event (e.g. kinematic distributions etc)

run_01_tag_1_banner.txt
unweighted_events.root
events.lhe.gz
unweighted_events.lhe.gz

Revision history for this message
Best Olivier Mattelaer (olivier-mattelaer) said :
#4

Hi,

Yes this one of the output that you can use.

Cheers,

Olivier

On 26 Sep 2015, at 16:37, Kristin Lohwasser <email address hidden> wrote:

> Question #271802 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/271802
>
> Status: Answered => Open
>
> Kristin Lohwasser is still having a problem:
> Thanks very much!!!!!
>
> I still am wondering about:
>
> 2) I get the following output files and I wondering, if it is correct to
> be using unweighted_events.root for anlaysis of event (e.g. kinematic
> distributions etc)
>
> run_01_tag_1_banner.txt
> unweighted_events.root
> events.lhe.gz
> unweighted_events.lhe.gz
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Revision history for this message
Kristin Lohwasser (kristin-lohwasser) said :
#5

THANK YOU!!!!

Revision history for this message
Kristin Lohwasser (kristin-lohwasser) said :
#6

Thanks Olivier Mattelaer, that solved my question.