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Re: VertexFinder [message #5400 is a reply to message #5398]

Wed, 14 November 2007 18:21

asanchez
Messages: 350
Registered: March 2006

first-grade participant

From: *gsi.de

hi Andrei, i was looking inside others packages
also to manage the same point, and i found that
inside of recotask
there is a so called Lambdaselector class created ny Sebastian.it is used to determined the decay vertex of lambda
by using the #include "ExtrapolateToPCA.h"

// find point of closest approach
ExtrapolateToPCA(protontrk,piontrk);

std::cout<<"Vertex at:"<<std::endl;
Int_t size=_vertexArray->GetEntriesFast();
TVector3* v=new((*_vertexArray)[size]) TVector3(0.5*(protontrk->getPos()+piontrk->getPos()));
v->Print();

so i don't know .
I have not yet tried.Let me know if it works well.

cheers ALicia.

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[Message index]

		VertexFinder By: Anonymous Poster on Wed, 14 November 2007 17:29
		Re: VertexFinder By: asanchez on Wed, 14 November 2007 18:21
		Re: VertexFinder By: asanchez on Wed, 14 November 2007 18:58
		Re: VertexFinder By: Lia Lavezzi on Fri, 16 November 2007 15:35

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