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STTPoints do not match with STTHelixHit [message #8281]

Wed, 22 April 2009 14:21

Tobias Stockmanns
Messages: 489
Registered: May 2007

first-grade participant

From: *ikp.kfa-juelich.de

Dear pandaRooters and STT experts,

I have simulated D+ D- events with the MVD and STT. During the analysis of the output of the simulation I have realized that there is a significant difference between the STTPoint coordinates (Xtot, Ytot, Ztot) which should give the MC coordinate of a hit and the reconstructed position in SttHelixHit.

I have attached a corresponding Eve plot:

index.php?t=getfile&id=5279&private=0

The red small squares are the MC coordinates the colored boxes are the reconstructed hits. The innermost points come from the MVD the rest ist STT data.

For the reconstruction of the STT points I have used:

PndSttTrackFinderIdeal
PndSttMatchTracks
PndSttHelixTrackFitter(0)
PndSttHelixHitProducer;

The macros can be found in /macro/mvd/Tobias/runMvdSim -> runMvdDigi -> runMvdReco.

Is this an expected behavior or is there something going wrong?

Thank you for your help.

Tobias

Attachment: STTPointsAndHits.png
(Size: 17.00KB, Downloaded 562 times)

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[Message index]

		STTPoints do not match with STTHelixHit By: Tobias Stockmanns on Wed, 22 April 2009 14:21
		Re: STTPoints do not match with STTHelixHit By: Lia Lavezzi on Thu, 23 April 2009 12:07
		Re: STTPoints do not match with STTHelixHit By: StefanoSpataro on Thu, 23 April 2009 16:22
		Re: STTPoints do not match with STTHelixHit By: Susanna Costanza on Fri, 24 April 2009 13:31
		Re: STTPoints do not match with STTHelixHit By: asanchez on Fri, 24 April 2009 13:53
		Re: STTPoints do not match with STTHelixHit By: Susanna Costanza on Fri, 24 April 2009 15:58
		Re: STTPoints do not match with STTHelixHit By: asanchez on Fri, 24 April 2009 16:22
		Re: STTPoints do not match with STTHelixHit By: Susanna Costanza on Fri, 24 April 2009 17:02

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