GSI Forum: Analysis » No back propagation to IP for V

Home » PANDA » PandaRoot » Analysis » No back propagation to IP for V_0 reconstruction

Show: Today's Messages :: Polls :: Message Navigator

Re: No back propagation to IP for V_0 reconstruction [message #17633 is a reply to message #17627]

Thu, 04 December 2014 12:43

donghee
Messages: 385
Registered: January 2009
Location: Germnay

first-grade participant

From: *tmn.scc.kit.edu

Hi Stefano,

First of all, I plotted meaningless distance in previous posting.
I simply forgot to replace truth object after accessing reconstructed K_s in order to have true information.
Now I found where is something wrong and fixed my code to plot correctly.
Plots show the distance between D_0 vertex and K_s vertex and normalized one.
I access true D_0 vertex and K_s vertex by K_s itself and its daughter. Accessor looks like this.

Quote:

RhoCandidate *truth = ks0[j]->GetMcTruth();
TVector3 vdist = truth->Pos() - truth->Daughter(0)->Pos();
Float_t dist = vdist.Mag();
Float_t ctau = dist * truth->M() / truth->P();

Every black line is a generated decay distance and normalized distribution by distance*(m/p).
And suvived(reconstruced correctly) decay distance are plotted to test the quality of efficiency in every decay region.
I do not see any improvement from no back propagation approach, still.

index.php?t=getfile&id=8208&private=0

Best wishes,
Donghee

Attachment: test_4_plots.png
(Size: 28.24KB, Downloaded 1366 times)

Report message to a moderator

[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

Previous Topic:	Vertex fitter for two consecutive decays
Next Topic:	Efficiency reduction of antiprotons above 20 degrees

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Tue Jun 30 21:11:22 CEST 2026

Total time taken to generate the page: 0.00687 seconds