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Opened 14 years ago

Closed 11 years ago

#32 closed Bug (fixed)

NTracks dans TauJet et Jet

Reported by: Xavier Rouby Owned by:
Priority: major Milestone:
Component: Delphes code Version: 1.9
Keywords: Cc:

Description

Hello,
On Mon, 14 Jun 2010 17:19:43 +0200, Chris Boddy <c.boddy1@…> wrote:

Great! we have been waiting for your updated Delphes package.

One point though; I have installed and ran it on some files. I notice that almost every jet and taujet candidate seems to have Ntracks = 0, whereas Delphes_V_1.8 had a realistic distribution. Is there any reason to expect this now?

Thanks,
Chris

Change History (4)

comment:1 by cp3-support, 13 years ago

Type: archiveBug

comment:2 by favereau, 12 years ago

Priority: criticalmajor

comment:3 by Pavel Demin, 11 years ago

For the moment, in Delphes 3, the number of tracks is not stored in the output ROOT file.

The reason is that it is not clear how to define this value: we could count either tracks in a cone of given (by whom?) radius or tracks that are really used to reconstruct jet (jet's constituents).

As the output ROOT file contains all necessary information, this value can be easily calculated in the analysis ROOT macro. For example, root2lhco.cpp contains the following code:

    TIterator *fItTrack = fBranchTrack->MakeIterator();
    ...
    Int_t counter = 0;
    fItTrack->Reset();
    while((track = static_cast<Track*>(fItTrack->Next())))
    {
      if(element->P4().DeltaR(track->P4()) < 0.5) ++counter;
    }

comment:4 by Pavel Demin, 11 years ago

Resolution: fixed
Status: newclosed
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