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Re: Question on GeaneTrackRep. [message #8017 is a reply to message #8016]

Tue, 10 March 2009 10:26

Sebastian Neubert
Messages: 282
Registered: March 2006
Location: Munich

first-grade participant

From: *natpool.mwn.de

Dear colleagues,

I thought about this issue for some time at several occasions in the past and I always came to the conclusion, that there is no failsafe way to handle this ambiguity. From the measured hits alone one cannot tell in which direction the particle was going. The most general way is to fit both hypotheses.

One could make some tentative assumptions based on the general topology (most tracks come from the IP) but this is not general.

In my view it is a question that cannot be solved in the fitter! The direction of the track has to be decided upon during pattern recognition.

The hits have to be sorted along the track before the fitting! This has always been pointed out. It is also part of the pattern recognition (and not the easiest one).

Cheers!
Sebastian.

Sebastian Neubert
Technische Universität München
Department Physik E18
sneubert@e18.physik.tu-muenchen.de
tel: +49-8928912592

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[Message index]

		Question on GeaneTrackRep. By: Lia Lavezzi on Fri, 06 March 2009 17:30
		Re: Question on GeaneTrackRep. By: Anonymous Poster on Fri, 06 March 2009 17:38
		Re: Question on GeaneTrackRep. By: Anonymous Poster on Mon, 09 March 2009 21:28
		Re: Question on GeaneTrackRep. By: Sebastian Neubert on Tue, 10 March 2009 10:26
		Re: Question on GeaneTrackRep. By: Lia Lavezzi on Tue, 10 March 2009 16:30
		Re: Question on GeaneTrackRep. By: Anonymous Poster on Tue, 10 March 2009 16:43
		Re: Question on GeaneTrackRep. By: Lia Lavezzi on Tue, 10 March 2009 17:14
		Re: Question on GeaneTrackRep. By: Anonymous Poster on Tue, 10 March 2009 18:03
		Re: Question on GeaneTrackRep. By: Lia Lavezzi on Tue, 10 March 2009 19:25
		Re: Question on GeaneTrackRep. By: Anonymous Poster on Thu, 09 April 2009 18:11
		Re: Question on GeaneTrackRep. By: Anonymous Poster on Tue, 10 March 2009 11:15

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