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Re: Momentum resolution and reconstruction efficiency of LHE tracking [message #10181 is a reply to message #10178]

Thu, 11 February 2010 14:34

asanchez
Messages: 350
Registered: March 2006

first-grade participant

From: *kph.uni-mainz.de

Hi everybody,
to my understanding
tracking of low momentum particle(e.g pions P < 100 MeV/c)
are not considered by geane.(See GeaneTrackRep.cxx)

139 // protect against low momentum:
140 if(fabs(fState[0][0])>10){
141 GFException exc("GeaneTrackRep: PROTECT AGAINST LOW MOMENTA",__LINE__,__FILE__);
142 exc.setFatal();
143 throw exc;
144 }

I have checked to move this cut to lower momentum values(P ~60 MeV/c,
it works but there are still instabilities( crashes after 5000 events)

Nevertheless even if the particle is losing energy
geane should be able to take care of that? or am i wrong?
So far i know instead of a helix, geane considers then a parabola(x,y,dx/dz,dy/dz).

cheers
Alicia.

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[Message index]

		Momentum resolution and reconstruction efficiency of LHE tracking By: David Pohl on Wed, 10 February 2010 19:21
		Re: Momentum resolution and reconstruction efficiency of LHE tracking By: StefanoSpataro on Wed, 10 February 2010 21:05
		Re: Momentum resolution and reconstruction efficiency of LHE tracking By: Gianluigi Boca on Wed, 10 February 2010 23:18
		Re: Momentum resolution and reconstruction efficiency of LHE tracking By: Johan Messchendorp on Wed, 10 February 2010 23:49
		Re: Momentum resolution and reconstruction efficiency of LHE tracking By: StefanoSpataro on Thu, 11 February 2010 00:21
		Re: Momentum resolution and reconstruction efficiency of LHE tracking By: Johan Messchendorp on Thu, 11 February 2010 00:30
		Re: Momentum resolution and reconstruction efficiency of LHE tracking By: StefanoSpataro on Thu, 11 February 2010 07:47
		Re: Momentum resolution and reconstruction efficiency of LHE tracking By: Johan Messchendorp on Thu, 11 February 2010 09:47
		Re: Momentum resolution and reconstruction efficiency of LHE tracking By: StefanoSpataro on Thu, 11 February 2010 10:05
		Re: Momentum resolution and reconstruction efficiency of LHE tracking By: David Pohl on Thu, 11 February 2010 10:43
		Re: Momentum resolution and reconstruction efficiency of LHE tracking By: StefanoSpataro on Thu, 11 February 2010 11:05
		Re: Momentum resolution and reconstruction efficiency of LHE tracking By: David Pohl on Thu, 11 February 2010 11:15
		Re: Momentum resolution and reconstruction efficiency of LHE tracking By: StefanoSpataro on Thu, 11 February 2010 11:20
		Re: Momentum resolution and reconstruction efficiency of LHE tracking By: StefanoSpataro on Thu, 11 February 2010 12:49
		Re: Momentum resolution and reconstruction efficiency of LHE tracking By: David Pohl on Thu, 11 February 2010 14:22
		Re: Momentum resolution and reconstruction efficiency of LHE tracking By: asanchez on Thu, 11 February 2010 14:34
		Re: Momentum resolution and reconstruction efficiency of LHE tracking By: asanchez on Thu, 11 February 2010 14:49
		Re: Momentum resolution and reconstruction efficiency of LHE tracking By: Lia Lavezzi on Thu, 11 February 2010 15:19
		Re: Momentum resolution and reconstruction efficiency of LHE tracking By: asanchez on Thu, 11 February 2010 15:35
		Re: Momentum resolution and reconstruction efficiency of LHE tracking By: Anonymous Poster on Thu, 11 February 2010 15:46
		Re: Momentum resolution and reconstruction efficiency of LHE tracking By: Alberto Rotondi on Thu, 11 February 2010 18:51
		Re: Momentum resolution and reconstruction efficiency of LHE tracking By: Gianluigi Boca on Sat, 13 February 2010 23:06

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