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Re: Changes in PndTpcRiemannTrackingTask [message #12349 is a reply to message #12348]

Tue, 26 July 2011 14:07

Johannes Rauch
Messages: 41
Registered: September 2010
Location: TUM

continuous participant

From: *natpool.mwn.de

Quote:

Then you have a found track with a charge sign as input to the Kalman and AFTER the Kalman fit you can have that the charge has changed sign, right?

Yes.

Quote:

Since the Kalman changes the sign at runtime, could it happen that the charge associated to the last hit (last params I mean) has opposite sign with respect to the one of the first hit?

When smoothing is not turned on, the track has only one state, and therefore only one charge.

I don't know what happens with smoothing turned on.
But what I saw in my display ist that usually in the second iteration the Kalman flips the charge if necessary. So with 3 iteration the charge should be consistent for all hits.

cheers,

Johannes

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[Message index]

		Changes in PndTpcRiemannTrackingTask By: Johannes Rauch on Mon, 25 July 2011 15:21
		Re: Changes in PndTpcRiemannTrackingTask By: Dima Melnychuk on Mon, 25 July 2011 21:53
		Re: Changes in PndTpcRiemannTrackingTask By: StefanoSpataro on Mon, 25 July 2011 23:06
		Re: Changes in PndTpcRiemannTrackingTask By: Dima Melnychuk on Mon, 25 July 2011 23:24
		Re: Changes in PndTpcRiemannTrackingTask By: Dima Melnychuk on Tue, 26 July 2011 09:30
		Re: Changes in PndTpcRiemannTrackingTask By: Johannes Rauch on Tue, 26 July 2011 11:33
		Re: Changes in PndTpcRiemannTrackingTask By: Lia Lavezzi on Tue, 26 July 2011 11:53
		Re: Changes in PndTpcRiemannTrackingTask By: Johannes Rauch on Tue, 26 July 2011 12:12
		Re: Changes in PndTpcRiemannTrackingTask By: Lia Lavezzi on Tue, 26 July 2011 13:15
		Re: Changes in PndTpcRiemannTrackingTask By: Johannes Rauch on Tue, 26 July 2011 13:45
		Re: Changes in PndTpcRiemannTrackingTask By: Lia Lavezzi on Tue, 26 July 2011 14:01
		Re: Changes in PndTpcRiemannTrackingTask By: Johannes Rauch on Tue, 26 July 2011 14:07
		Re: Changes in PndTpcRiemannTrackingTask By: Anonymous Poster on Tue, 26 July 2011 14:17
		Re: Changes in PndTpcRiemannTrackingTask By: Lia Lavezzi on Tue, 26 July 2011 15:47
		Re: Changes in PndTpcRiemannTrackingTask By: Johannes Rauch on Tue, 26 July 2011 20:03
		Re: Changes in PndTpcRiemannTrackingTask By: Johannes Rauch on Wed, 27 July 2011 11:20
		Re: Changes in PndTpcRiemannTrackingTask By: Dima Melnychuk on Wed, 27 July 2011 12:00

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