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True vertex position for secondary decay vertices [message #17737] Mon, 12 January 2015 21:31 Go to previous message
Ajay Kumar is currently offline  Ajay Kumar
Messages: 102
Registered: December 2011
Location: indore
continuous participant

From: 106.66.5*
Dear All,


I am trying to find true vertex position for Lambda0->p pi- and Lambdabar->pbar pi+. I have four track from the simulation and used PndMCTrack to find the true vertex position of Lambda and Lambdabar particles. I am using GetStartVertex() to find the vertex of lambda from its decay particle as below.

if(mctrack->GetSecondMotherID()==1){
if (mc_pid==2212)
{
vtx_x= mctrack->GetStartVertex().X ();
vtx_y= mctrack->GetStartVertex().Y();
vtx_z= mctrack->GetStartVertex().Z();
// r = sqrt(pow(vtx_x,2)+pow(vtx_y,2));
// countT1++;
//rzp-> Fill(vtx_z,r);
// if (vtx_z< 40)
// countT2++;

}
}
Is It giving the true vertex position of Lambda or not?
If not then how I should go for it?

Thanking you


AJAY KUMAR
Research scholar
Indian Institute of Technology Indore,Indore
Madhya Pradesh
India
 
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