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Question about PndLhePidTrack() [message #8554]

Thu, 14 May 2009 11:04

donghee
Messages: 385
Registered: January 2009
Location: Germnay

first-grade participant

From: *dip.t-dialin.net

Hello, panda trackers,

I have one question for PndLhePidTrack();
I'm looking for the reconstruction of electron from PndLhePidTrack. I'm following now the example of lhetrack in the macro.

In attached plot, you can find the comparison between generated electron and reconstructed one from PndLhePidTrack::GetP() function. Red histogram is generated, and Blue for reconstruction of negative charge.
The generated event is electron, photon, and proton.
Most of electrons are produced to the direction of backward spectrometer, i.e, theta > 130 degree.
I would like to understand why 2.5-3.5 GeV/c electron candidates are not reconstructed well.
I assumed that I don't take into account magnet field in reco procedure. It would be thankful if you can check my reco scripts, or can give an useful advice for this analysis, specially for electron reconstruction.

Thank you!

In the reco script, I introduce following lines.

Quote:

// ------------------------------------------------------------------------
// ----- LHETRACK ---------------------------------

PndLheHitsMaker* trackMS = new PndLheHitsMaker("Tracking routine");
trackMS->SetTpcMode(2); // 0 OFF, 1 TpcPoint, 2 TpcCluster // TpcPoint smearing [cm], if negative no smearing
trackMS->SetMvdMode(2); // 0 OFF, 1 MVDPoint, 2 MVDHit // MVDPoint smearing [cm], if negative no smearing
fRun->AddTask(trackMS);

PndTpcLheTrackFinder* trackFinder = new PndTpcLheTrackFinder();
fRun->AddTask(trackFinder);

PndTpcLheTrackFitter* trackFitter = new PndTpcLheTrackFitter("fitting");
fRun->AddTask(trackFitter);

PndLhePidMaker* pidMaker = new PndLhePidMaker("pid");
pidMaker->SetGeanePro(kFALSE); // Switch ON Geane propagation
pidMaker->SetDebugMode(kTRUE); // Debug ntuples
fRun->AddTask(pidMaker);

Attachment: Momentum_electron_one.eps
(Size: 10.46KB, Downloaded 336 times)
Attachment: Theta_electron_one.eps
(Size: 8.89KB, Downloaded 337 times)

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[Message index]

		Question about PndLhePidTrack() By: donghee on Thu, 14 May 2009 11:04
		Re: Question about PndLhePidTrack() By: StefanoSpataro on Thu, 14 May 2009 14:43
		Re: Question about PndLhePidTrack() By: donghee on Thu, 14 May 2009 14:55
		Re: Question about PndLhePidTrack() By: StefanoSpataro on Thu, 14 May 2009 14:58
		Re: Question about PndLhePidTrack() By: donghee on Thu, 14 May 2009 15:39
		Re: Question about PndLhePidTrack() By: StefanoSpataro on Thu, 14 May 2009 16:01
		Re: Question about PndLhePidTrack() By: donghee on Thu, 14 May 2009 16:38
		Re: Question about PndLhePidTrack() By: StefanoSpataro on Mon, 18 May 2009 08:34
		Re: Question about PndLhePidTrack() By: donghee on Thu, 14 May 2009 15:05
		Re: Question about PndLhePidTrack() By: StefanoSpataro on Thu, 14 May 2009 15:26

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