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Re: Tracking: Kalman Task with STT,(electron hypo) [message #11397 is a reply to message #11396]

Thu, 23 December 2010 13:30

StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino

first-grade participant

From: *0-87-r.retail.telecomitalia.it

I still do not understand; let's forget about the tails, for the moment:

Muon: p_rec - p_mc narrower, p_rec - p_mv / sigma broader
EWlectrons: p_rec - p_mc broader, p_rec - p_mc / sigma narrower

->
Muons: sigma smaller
Electrons: sigma bigger

Muons have a better residulas, but small errors (why?)
Electrons have larger residuals, and larger errors.

I would suppose that errors for muons should be larger, and also the residuals, considering that this is the wrong hypothesis. Electrons should fit better the points, with a reduced residual and properly calculated errors. But this does not appear.

I continue to think that there is something wrong somewhere for electrons.
Let's remember that track parameters are used not only for kinematical fit, but also for pid and for correlation, where we do not need covariance matrix.

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[Message index]

		Tracking: Kalman Task with STT,(electron hypo) By: M.Babai on Tue, 21 December 2010 11:47
		Re: Tracking: Kalman Task with STT,(electron hypo) By: StefanoSpataro on Tue, 21 December 2010 12:03
		Re: Tracking: Kalman Task with STT,(electron hypo) By: Anonymous Poster on Tue, 21 December 2010 12:11
		Re: Tracking: Kalman Task with STT,(electron hypo) By: M.Babai on Tue, 21 December 2010 12:20
		Re: Tracking: Kalman Task with STT,(electron hypo) By: Lia Lavezzi on Tue, 21 December 2010 12:42
		Re: Tracking: Kalman Task with STT,(electron hypo) By: Lia Lavezzi on Tue, 21 December 2010 19:46
		Re: Tracking: Kalman Task with STT,(electron hypo) By: StefanoSpataro on Tue, 21 December 2010 19:52
		Re: Tracking: Kalman Task with STT,(electron hypo) By: M.Babai on Tue, 21 December 2010 12:11
		Re: Tracking: Kalman Task with STT,(electron hypo) By: Ronald Kunne on Wed, 22 December 2010 09:58
		Re: Tracking: Kalman Task with STT,(electron hypo) By: Lia Lavezzi on Wed, 22 December 2010 18:22
		Re: Tracking: Kalman Task with STT,(electron hypo) By: M.Babai on Thu, 23 December 2010 10:32
		Re: Tracking: Kalman Task with STT,(electron hypo) By: Lia Lavezzi on Thu, 23 December 2010 13:01
		Re: Tracking: Kalman Task with STT,(electron hypo) By: Jens Sören Lange on Thu, 23 December 2010 14:05
		Re: Tracking: Kalman Task with STT,(electron hypo) By: Lia Lavezzi on Thu, 23 December 2010 21:54
		Re: Tracking: Kalman Task with STT,(electron hypo) By: StefanoSpataro on Thu, 23 December 2010 12:57
		Re: Tracking: Kalman Task with STT,(electron hypo) By: Lia Lavezzi on Thu, 23 December 2010 13:07
		Re: Tracking: Kalman Task with STT,(electron hypo) By: StefanoSpataro on Thu, 23 December 2010 13:30
		Re: Tracking: Kalman Task with STT,(electron hypo) By: Jens Sören Lange on Thu, 23 December 2010 22:57
		Re: Tracking: Kalman Task with STT,(electron hypo) By: Lia Lavezzi on Fri, 24 December 2010 12:06
		Re: Tracking: Kalman Task with STT,(electron hypo) By: Alberto Rotondi on Fri, 24 December 2010 14:14

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