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Re: Changes in PndTpcRiemannTrackingTask [message #12351 is a reply to message #12350]

Tue, 26 July 2011 15:47

Lia Lavezzi
Messages: 291
Registered: May 2007
Location: Torino

first-grade participant

From: *pv.infn.it

Hi Christian

Quote:

However: Since we do repeated Kalman iterations this should never happen. A wrong charge hypothesis could be turned around in the first forward fit, but then it will stay. So with >=2 iterations this should never happen.

Actually for the STT we saw that more than 1 iteration does not improve the results, for some momenta (lower ones) it even worsen the efficiency.

For this reason we would like to run the reconstruction with only one iteration. This is the best option for us.

Anyway, we will check how many times, with one iteration, we get that the Kalman sets the first and last hit charges to a different value and how many times it changes the charge sign to the wrong one. Maybe it does not happen so often to make us to worry about.

Ciao,
Lia.

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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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