set an anti b-quark(b bar) for a variable/selection/plot in reco mode

Asked by Hilal on 2019-01-21

Dear MA5 experts
I have a process contains b bbar in the final state.
how can i set an anti b-quark(b bar) for a variable/selection/plot in reco mode from a hepmc file?

Question information

Language:
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Status:
Answered
For:
MadAnalysis 5 Edit question
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Last query:
2019-01-24
Last reply:
2019-01-24
Benjamin Fuks (fuks) said : #1

Hi Hilal,

There is no bbar jet in reco mode. Only b-jets, regardless of the initial b-quark.

Regards,

Benjamin

> On 21 Jan 2019, at 16:42 , Hilal <email address hidden> wrote:
>
> New question #677965 on MadAnalysis 5:
> https://answers.launchpad.net/madanalysis5/+question/677965
>
> Dear MA5 experts
> I have a process contains b bbar in the final state.
> how can i set an anti b-quark(b bar) for a variable/selection/plot in reco mode from a hepmc file?
>
> --
> You received this question notification because you are an answer
> contact for MadAnalysis 5.

Hilal (hhamdell) said : #2

Hi Fuks,

thanks a lot for your reply.

also, how can i plot the invariant mass of missing energy in reco mode (from a hepmc file), i tried like:
define invisible = 12 -12 14 -14 16 -16
plot M(invisible invisible)
I find empty plot (in contrast when i plot it in partonic mode )

Benjamin Fuks (fuks) said : #3

You should enter a cross section (or normalize the results to one), as it is lost in the reco process. The PDG code for the MET is 12.

Cheers,

Benjamin

> On 24 Jan 2019, at 12:22 , Hilal <email address hidden> wrote:
>
> Question #677965 on MadAnalysis 5 changed:
> https://answers.launchpad.net/madanalysis5/+question/677965
>
> Status: Answered => Open
>
> Hilal is still having a problem:
> Hi Fuks,
>
> thanks a lot for your reply.
>
> also, how can i plot the invariant mass of missing energy in reco mode (from a hepmc file), i tried like:
> define invisible = 12 -12 14 -14 16 -16
> plot M(invisible invisible)
> I find empty plot (in contrast when i plot it in partonic mode )
>
> --
> You received this question notification because you are an answer
> contact for MadAnalysis 5.

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