GSI Forum
GSI Helmholtzzentrum für Schwerionenforschung

Home » PANDA » PandaRoot » Analysis » [FIXED] Mc Truth Match
Re: Mc Truth Match [message #15273 is a reply to message #15272] Tue, 20 August 2013 16:18 Go to previous messageGo to previous message
StefanoSpataro is currently offline  StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino
first-grade participant

From: 2.235.190*
Simone Esch wrote on Tue, 20 August 2013 16:09


I think it is not a good idea to put everywhere the 0.2 if something at the pid stage fails.
Is there not a flag to indicate this, to be able to filter it out?



We have 5 particle hypothesis. If the pid algorithm fails, whatever it is, then all the 5 particles have the same probability -> 1/5 = 0.2 -> 20%. from the statistical point of view this is correct. Those tracks should not becut away, simply you don0t have pid information for them.
The point is that one should cut with probability more than such 20%, maybe the Loose condition should be moved to 25% just to be safe.

Quote:


I understand that the PidAlgoIdealCharged just sets the right probability and nothing else, but still I thik that the name is then missleading. I thought i would use a somehow MC base algorythem which sets all characteristics right so that the FillList method really just pick the right ones.

If this is kept like this, this should be mentioned in the tutorial.



I have not understood, the PidAlgoIdealCharged assigns the mc id to each candidate, as it should be, using the PndPidProbability object -> a mcpion will have probability of being a pion 1 and prog of e/mu/k/p = 0, so that this info can be used by FillList. This is not "ideal" parameters, this is ideal identification. The FillList picks the correct particles identified by MC.

In this sense, PidAlgoIdealCharged is doing its job coherent with all the other algorithms, and I have not understood the last comment. Could you please be more explicit?

 
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Previous Topic: [FIXED] PndAnalysis::McTruthMatch always returns false, again ....
Next Topic: [FIXED] Bug in RhoCandList (?)
Goto Forum:
  


Current Time: Thu Apr 25 14:15:01 CEST 2019

Total time taken to generate the page: 0.02740 seconds