GSI Forum
GSI Helmholtzzentrum für Schwerionenforschung

Home » PANDA » PandaRoot » Bugs, Fixes, Releases » [FIXED] Problem with daughter links
[FIXED] Problem with daughter links [message #14800] Fri, 24 May 2013 17:04 Go to previous message
Andreas Pitka is currently offline  Andreas Pitka
Messages: 38
Registered: November 2011
Location: Gießen
continuous participant
From: *physik.uni-giessen.de
Dear all,

i realized following weird problem, when examining the decay: anti-D0 -> K+ pi-

I got my RhoCandList by aD.Combine(Kp,pim)

when i now compare the values:


for(int j=0;j<aD.GetLength();j++)
{
// Mass of the anti-D0 Candidate
double mass=aD[j].M();

TLorentzVector d1_p4=aD[j].Daughter(0)->P4();   
TLorentzVector d2_p4=aD[j].Daughter(1)->P4(); 
TLorentzVector moth_p4=d1_p4+d2_p4;

// Mass of the anti-D0 by the four-vectors of the two daughters
double mass2=moth_p4.Mag();
}


they are quite often not the same. How can this be?

Best regards

Andreas

ps i used rev 19948

[Updated on: Thu, 04 July 2013 14:12] by Moderator

Report message to a moderator

 
Read Message
Read Message
Read Message
Read Message
Read Message
Previous Topic: [WONTFIX] PID Error
Next Topic: [FIXED] crash
Goto Forum:
  


Current Time: Tue Jul 23 23:09:50 CEST 2024

Total time taken to generate the page: 0.00867 seconds