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Re: Vertex Fitter in Fast simulation [message #16139 is a reply to message #16125] Tue, 01 April 2014 11:21 Go to previous messageGo to previous message
donghee is currently offline  donghee
Messages: 385
Registered: January 2009
Location: Germnay
first-grade participant
From: *kph.uni-mainz.de
Hi,

I have same question, what Elisabetta pointed out.
You suggestion is not correctly working for composited candidate as like D+.
GetPosition() of D+ is everytime equal to zero, no meaning at all.

Let assume
I have three different tracklet for D+ decay into K- pi+ pi+, each composite track has different positions.
After composition to D+ we have total 3 variated positions according smearing of track smearing.

Quote:

RhoCandidate *dpk = dp[j]->Daughter(0); //
TVector3 dpVtx1 = dpk->Pos();
RhoCandidate *dppi1 = dp[j]->Daughter(1); //
TVector3 dpVtx2 = dppi1->Pos();
RhoCandidate *dppi2 = dp[j]->Daughter(2);
TVector3 dpVtx3 = dppi2->Pos();



where, dp = composite candidate list for D+ -> K- pi+ pi+




Best wishes,
Donghee

 
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