generate process

Asked by sonus on 2017-12-04

Hi,

I want to collide two proton beam without specific result.
With MadGraph usually i generate processes like p p > j etc.
I want to generate like p p > Everything.
No specific results!
I saw something like p p > all. Is this okey?

After this data, i will search for Kaon particle.

Here is an example with pythia6

https://root.cern.ch/doc/master/pythiaExample_8C_source.html

#from example
// ... and initialise it to run p+p at sqrt(200) GeV in CMS
  pythia->Initialize("cms", "p", "p", 200);

I want to do this kind of job with madgaph + deplhes + root
How can i do?
Thank you.

Question information

Language:
English Edit question
Status:
Answered
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MadGraph5_aMC@NLO Edit question
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Last query:
2017-12-04
Last reply:
2017-12-05

Hi,

Since you are going to be dominated by the dijet cross-section (and that other process will be smaller than the theoretical uncertainty on di-jet. —you might want to check such statement—)
I would simply do
generate p p > j j

Cheers,

Olivier

> On Dec 4, 2017, at 07:28, sonus <email address hidden> wrote:
>
> Question #661392 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/661392
>
> Description changed to:
> Hi,
>
> I want to collide two proton beam without specific result.
> With MadGraph usually i generate processes like p p > j etc.
> I want to generate like p p > Everything.
> No specific results!
> I saw something like p p > all. Is this okey?
>
> After this data, i will search for Kaon particle.
>
> Here is an example with pythia6
>
> https://root.cern.ch/doc/master/pythiaExample_8C_source.html
>
> #from example
> // ... and initialise it to run p+p at sqrt(200) GeV in CMS
> pythia->Initialize("cms", "p", "p", 200);
>
> I want to do this kind of job with madgaph + deplhes + root
> How can i do?
> Thank you.
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

sonus (sonus) said : #2

Thank you, i will try this.

..and one more question:

How about defining multi-particle?
what happens if I define kaon particle and generate pp > kaon.
would it be same with pythiaexample.c ?

Hi,

> How about defining multi-particle?

You can do
generate p p > all all
But I doubt that you will gain in precision. (and this will be much slower)

> what happens if I define kaon particle and generate pp > kaon.

In general, MG5aMC can not handle kaon physics since this is non perturbative.
So except for cases where you can use an effective perturbative model, kaon should not be included inside MG5aMC.

Cheers,

Olivier

> what happens if I define kaon particle and generate pp > kaon.
> would it be same with pythiaexample.c ?
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

> On Dec 4, 2017, at 09:34, sonus <email address hidden> wrote:
>
> Question #661392 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/661392
>
> sonus posted a new comment:
> Thank you, i will try this.
>
> ..and one more question:
>
> How about defining multi-particle?
> what happens if I define kaon particle and generate pp > kaon.
> would it be same with pythiaexample.c ?
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

sonus (sonus) said : #4

Thank you so much for your answers.

One more question:

I usually use Madgraph + Pythia + Delphes in my analysis.
Today I worked with Pythia makro and it gave a root output.
I need to make detector simulation with this root output + delphes.

Delphes accepts some input format like lhef, hepmc etc. but I don't think ".root" ?

In Madgraph I just choose detector = delphes and thats all.
first madgraph + Pythia runs and than what kind of file format goes to delphes after mg + Pythia ?
I am asking because if I learn how madgraph + delphes does this job I can use this kind of method.

I couldn't find any converter root to hepmc or lhef.
I need this because my Pythia macro just gives root output file.. But I need to make detector simulation with this root file..
And delphes doesn't accept root file I think.

Thank you.

The output of pythia8 that we feed to Delphes is an hepmc file.

Cheers,

Olivier
> On Dec 5, 2017, at 20:22, sonus <email address hidden> wrote:
>
> Question #661392 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/661392
>
> sonus posted a new comment:
>
> Thank you so much for your answers.
>
> One more question:
>
> I usually use Madgraph + Pythia + Delphes in my analysis.
> Today I worked with Pythia makro and it gave a root output.
> I need to make detector simulation with this root output + delphes.
>
> Delphes accepts some input format like lhef, hepmc etc. but I don't
> think ".root" ?
>
> In Madgraph I just choose detector = delphes and thats all.
> first madgraph + Pythia runs and than what kind of file format goes to delphes after mg + Pythia ?
> I am asking because if I learn how madgraph + delphes does this job I can use this kind of method.
>
> I couldn't find any converter root to hepmc or lhef.
> I need this because my Pythia macro just gives root output file.. But I need to make detector simulation with this root file..
> And delphes doesn't accept root file I think.
>
> Thank you.
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

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