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Re: Lhe tracking results: reconstruction error for transverse momenta <= 1 GeV/c, all five partic [message #11231 is a reply to message #11228]

Wed, 24 November 2010 13:57

David Pohl
Messages: 18
Registered: October 2009
Location: FZ Juelich

occasional visitor

From: *ikp.kfa-juelich.de

Hi Stefano,

okay. This means that the Kalman task does not take the bremsstrahlung correctly into account?

The x-y plane plots for the LheHits are not to easy to judge.
I think to recognize cirlces is not easy for the human brain Razz

.

On the first view one can assume that the kaons for 200 MeV/c transverse momenta do not lie on a circle.
Especially in the outer regions:
index.php?t=getfile&id=6206&private=0

Corresponding reconstructed transverse momenta:
index.php?t=getfile&id=6207&private=0

For 300 MeV/c transverse momenta the kaon tracks do not look that bent:
index.php?t=getfile&id=6208&private=0

Corresponding reconstructed transverse momenta:
index.php?t=getfile&id=6209&private=0

For electrons its an issue of the Kalman task I think:
index.php?t=getfile&id=6212&private=0

Corresponding reconstructed transverse momenta:
index.php?t=getfile&id=6213&private=0

Honestly I am at the moment quite busy with writing my thesis Confused

and have no time to do dedicated "bug search".
I just wanted to show this issue to inform the tracking experts.

greetings,
David

p.s.: the plots in conformal mapping space are better to judge:
little bit bent
index.php?t=getfile&id=6214&private=0

straight line
index.php?t=getfile&id=6215&private=0

Attachment: LHEhelix_reco_tpc_200_kaons.jpg
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Attachment: pt_reco_tpc_200_kaons.jpg
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Attachment: LHEhelix_reco_tpc_300_kaons.jpg
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Attachment: pt_reco_tpc_300_kaons.jpg
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Attachment: LHEhelix_reco_tpc_600_electrons.jpg
(Size: 68.95KB, Downloaded 874 times)
Attachment: pt_reco_tpc_600_electrons.jpg
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Attachment: LHEhelixConfMap_reco_tpc_200_kaons.jpg
(Size: 50.35KB, Downloaded 770 times)
Attachment: LHEhelixConfMap_reco_tpc_300_kaons.jpg
(Size: 47.80KB, Downloaded 841 times)

[Updated on: Wed, 24 November 2010 14:21]

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[Message index]

		Lhe tracking results: reconstruction error for transverse momenta <= 1 GeV/c, all five particles By: David Pohl on Tue, 23 November 2010 18:09
		Re: Lhe tracking results: reconstruction error for transverse momenta <= 1 GeV/c, all five partic By: StefanoSpataro on Tue, 23 November 2010 23:30
		Re: Lhe tracking results: reconstruction error for transverse momenta <= 1 GeV/c, all five partic By: David Pohl on Wed, 24 November 2010 13:57

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