MadAnalysis 5

Reason for soft jets - Delphes

Asked by JamesB

Hello,

I am generating events via MadGraph with Pythia for hadronisation, where I specify a minimum PT(jet) = 200GeV in the event p p > h j, h > j j lepton neutrino.

Once I use Delphes and look at the Jet PTs there are a significant number of events in which the leading jet has PT less than 200GeV. What do you suppose is the reason for this? I think the leptons might be reconstructed as jets, but why would this also mean the hard 200GeV jets are not detected?

Any suggestions?

Thank you,
James

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Benjamin Fuks (fuks) said : 		#1

Hi,

You pt cut is implemented at the hard-scattering level. Parton showering, hadronization and reconstruction change everything.

Cheers,

Benjamin

> On 30 Jan 2018, at 10:02 , JamesB <email address hidden> wrote:
>
> New question #663834 on MadAnalysis 5:
> https://answers.launchpad.net/madanalysis5/+question/663834
>
> Hello,
>
> I am generating events via MadGraph with Pythia for hadronisation, where I specify a minimum PT(jet) = 200GeV in the event p p > h j, h > j j lepton neutrino.
>
> Once I use Delphes and look at the Jet PTs there are a significant number of events in which the leading jet has PT less than 200GeV. What do you suppose is the reason for this? I think the leptons might be reconstructed as jets, but why would this also mean the hard 200GeV jets are not detected?
>
> Any suggestions?
>
> Thank you,
> James
>
> --
> You received this question notification because you are an answer
> contact for MadAnalysis 5.

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