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Re: No back propagation to IP for V_0 reconstruction [message #17633 is a reply to message #17627] Thu, 04 December 2014 12:43 Go to previous messageGo to previous message
donghee is currently offline  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


 
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