No b-quark in the hep file distribution

Hi Subhasish,

The content of the HEP file is not related to madanalysis 5. It is the shower code that is taking care of this. Another path to follow would be to check the b-tagging efficiency. If it is close to zero, it may lead sto the mistag of all b-jets.

Cheers,

Benj

On 28 Nov 2016, at 08:27 , SUBHASISH BEHERA <email address hidden> wrote:

> New question #404448 on MadAnalysis 5:
> https://answers.launchpad.net/madanalysis5/+question/404448
>
> Dear Benj,
> I am getting no b-quark in the hep file distribution though I am getting one b-quark in my lhe file distribution.
>
> I am using v1.4 for my analysis.
>
> Can you suggest why ?
>
>
> Thanks,
>
> Subhasish
>
> --
> You received this question notification because you are an answer
> contact for MadAnalysis 5.

Dear Benj,

       I can clearly see some b-jets in the plots from Pythia output as ploted by MadGraph5 in its plots as you can see in every generated pythia output, for instance : go to HTML/run_01/plots_pythia_tag_1 .

But when I import the same pythia output file *.hep.gz and put it in MA5, I found no b-jets.

I have attached some of the files for your conformation.

/home/testuser/TEST_RESEARCH/PACKAGES_USE/MADANALYSIS5/MadAnalysis5_v1_4/OUTPUT_EP2ET_FILES/ep2et2wb2muvmu_hep_output_sig_inbuilt_py_card_file/ep2et2wb2muvmu_hep_output_sig_inbuilt_py_card

Thanks,

Subhasish

Sorry the previous link is wrong.

Try this :

https://www.dropbox.com/sh/3dsebku77y4dl0r/AAA4m983DsddkaWS4mg1uvyVa?dl=0

Thanks,

Subhasish

Hi Subhashish,

In the pythia.lhe file created by madgraph, a jet reconstruction algorithm has been applied so that you have jets and b-jets. In HEP files, you only have hadrons and mesons. No jets at all. Which is what MA5 finds and that is correct.

Cheers,

Benjamin

On 28 Nov 2016, at 11:33 , SUBHASISH BEHERA <email address hidden> wrote:

> Question #404448 on MadAnalysis 5 changed:
> https://answers.launchpad.net/madanalysis5/+question/404448
>
> SUBHASISH BEHERA gave more information on the question:
> Sorry the previous link is wrong.
>
> Try this :
>
> https://www.dropbox.com/sh/3dsebku77y4dl0r/AAA4m983DsddkaWS4mg1uvyVa?dl=0
>
>
> Thanks,
>
> Subhasish
>
> --
> You received this question notification because you are an answer
> contact for MadAnalysis 5.

Dear Benj,

    You are absolutely right. So now if I want to make distribution for b-tagged or untagged jets and other particles like electrons or muons, then what are the methods to do those things.

1> Can I use the fastjet only to study only the HEP file and How ?
or
2>Can I use fastjet+delphes to study Root file file and get the distributions for jets and all particles etc as I do usually as per manual ?

3> Extension to Q.2 : I am using a LHeC card. So which detector should I put while generating the Root file for Q.2 analysis ?

Waiting for your replay.

Thanks,

Subhasish

Hi Subhasish,

>
> You are absolutely right. So now if I want to make distribution for b-tagged or untagged jets and other particles like electrons or muons, then what are the methods to do those things.
>
> 1> Can I use the fastjet only to study only the HEP file and How ?
> or
> 2>Can I use fastjet+delphes to study Root file file and get the distributions for jets and all particles etc as I do usually as per manual ?
You have indeed two ways:
 1. first you reconstruct the objects using the fastjet interface of ma5 (you can ask Shiba or Deepanjali for examples). Then you can analyze the resulting LHE file.
 2. You used delphes which is at the end similar to the above, except that you include detector effects. Again, you can ask your colleagues :)

> 3> Extension to Q.2 : I am using a LHeC card. So which detector should I
> put while generating the Root file for Q.2 analysis ?
You can edit the atlas/cms card and replace it with the card of your choice.

Cheers,

Benjamin

Hi Benj,
     Thank you so much. Now I could understand things better.

Thanks,

Subhasish

On 29 Nov 2016 18:42, "Benjamin Fuks" <email address hidden>
wrote:

> Your question #404448 on MadAnalysis 5 changed:
> https://answers.launchpad.net/madanalysis5/+question/404448
>
> Status: Open => Answered
>
> Benjamin Fuks proposed the following answer:
> Hi Subhasish,
>
> >
> > You are absolutely right. So now if I want to make distribution for
> b-tagged or untagged jets and other particles like electrons or muons, then
> what are the methods to do those things.
> >
> > 1> Can I use the fastjet only to study only the HEP file and How ?
> > or
> > 2>Can I use fastjet+delphes to study Root file file and get the
> distributions for jets and all particles etc as I do usually as per manual ?
> You have indeed two ways:
> 1. first you reconstruct the objects using the fastjet interface of ma5
> (you can ask Shiba or Deepanjali for examples). Then you can analyze the
> resulting LHE file.
> 2. You used delphes which is at the end similar to the above, except that
> you include detector effects. Again, you can ask your colleagues :)
>
>
> > 3> Extension to Q.2 : I am using a LHeC card. So which detector should I
> > put while generating the Root file for Q.2 analysis ?
> You can edit the atlas/cms card and replace it with the card of your
> choice.
>
> Cheers,
>
> Benjamin
>
> --
> If this answers your question, please go to the following page to let us
> know that it is solved:
> https://answers.launchpad.net/madanalysis5/+question/404448/
> +confirm?answer_id=5
>
> If you still need help, you can reply to this email or go to the
> following page to enter your feedback:
> https://answers.launchpad.net/madanalysis5/+question/404448
>
> You received this question notification because you asked the question.
>

Thanks Benjamin Fuks, that solved my question.

Hi Benj,
                 After ploting the reconstructed LHE file, Now I am getting b-jets. But now problem is, I am not getting any e- and mu+
(though these particles are there in LHE and HEP files). I have discussed with this problem with Shiba. But we are not able to fix this issue. Please suggest where could be the problems.

Regards,
Subhasish

Hi Shiba,

These may be parts of the jets, which happens if leptons are not isolated. Could you please analyze the hard scattering event file and verify that you have actually isolated leptons in there?

Cheers,

Benj

On 02 Dec 2016, at 14:17 , SUBHASISH BEHERA <email address hidden> wrote:

> Question #404448 on MadAnalysis 5 changed:
> https://answers.launchpad.net/madanalysis5/+question/404448
>
> Status: Solved => Open
>
> SUBHASISH BEHERA is still having a problem:
> Hi Benj,
> After ploting the reconstructed LHE file, Now I am getting b-jets. But now problem is, I am not getting any e- and mu+
> (though these particles are there in LHE and HEP files). I have discussed with this problem with Shiba. But we are not able to fix this issue. Please suggest where could be the problems.
>
>
>
>
> Regards,
> Subhasish
>
> --
> You received this question notification because you are an answer
> contact for MadAnalysis 5.

I meant, "Hi Subhasish' :)

On 02 Dec 2016, at 18:32 , Benjamin Fuks <email address hidden> wrote:

> Hi Shiba,
>
> These may be parts of the jets, which happens if leptons are not isolated. Could you please analyze the hard scattering event file and verify that you have actually isolated leptons in there?
>
> Cheers,
>
> Benj
>
>
> On 02 Dec 2016, at 14:17 , SUBHASISH BEHERA <email address hidden> wrote:
>
>> Question #404448 on MadAnalysis 5 changed:
>> https://answers.launchpad.net/madanalysis5/+question/404448
>>
>> Status: Solved => Open
>>
>> SUBHASISH BEHERA is still having a problem:
>> Hi Benj,
>> After ploting the reconstructed LHE file, Now I am getting b-jets. But now problem is, I am not getting any e- and mu+
>> (though these particles are there in LHE and HEP files). I have discussed with this problem with Shiba. But we are not able to fix this issue. Please suggest where could be the problems.
>>
>>
>>
>>
>> Regards,
>> Subhasish
>>
>> --
>> You received this question notification because you are an answer
>> contact for MadAnalysis 5.
>