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Re: No back propagation to IP for V_0 reconstruction [message #17632 is a reply to message #17611]

Thu, 04 December 2014 12:10

Ralf Kliemt
Messages: 508
Registered: May 2007
Location: GSI, Darmstadt

first-grade participant

From: *gsi.de

Hi Donghee,

I agree with Stefano: You need to do a vertex fit to get the proper momentum directions of the pions. What it does is to find the position along the tracks (helices) where the momentum is tangent. Where your momentum is defined before you give it to the fit does not matter that much. If you want to use the pions defined as they were right after the Kalman filter you may simply use

PndAnalysis::ResetCandidate(RhoCandidate*) or PndAnalysis::ResetDaughters(RhoCandidate*) .

e.g.:
(theAnalysis->ResetDaughters(kshort);)

Cheers
Ralf

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[Message index]

		No back propagation to IP for V_0 reconstruction By: donghee on Tue, 02 December 2014 15:29
		Re: No back propagation to IP for V_0 reconstruction By: StefanoSpataro on Tue, 02 December 2014 17:14
		Re: No back propagation to IP for V_0 reconstruction By: donghee on Tue, 02 December 2014 20:57
		Re: No back propagation to IP for V_0 reconstruction By: donghee on Wed, 03 December 2014 23:17
		Re: No back propagation to IP for V_0 reconstruction By: StefanoSpataro on Wed, 03 December 2014 23:21
		Re: No back propagation to IP for V_0 reconstruction By: donghee on Thu, 04 December 2014 10:47
		Re: No back propagation to IP for V_0 reconstruction By: StefanoSpataro on Thu, 04 December 2014 11:07
		Re: No back propagation to IP for V_0 reconstruction By: donghee on Thu, 04 December 2014 12:43
		Re: No back propagation to IP for V_0 reconstruction By: StefanoSpataro on Thu, 04 December 2014 13:23
		Re: No back propagation to IP for V_0 reconstruction By: donghee on Thu, 04 December 2014 22:26
		Re: No back propagation to IP for V_0 reconstruction By: StefanoSpataro on Sat, 06 December 2014 16:53
		Re: No back propagation to IP for V_0 reconstruction By: Ralf Kliemt on Thu, 04 December 2014 12:10
		Re: No back propagation to IP for V_0 reconstruction By: donghee on Thu, 04 December 2014 13:02

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