GSI Forum
GSI Helmholtzzentrum für Schwerionenforschung

Home » PANDA » PandaRoot » Bugs, Fixes, Releases » Low momentum tracks in TPC
icon5.gif  Low momentum tracks in TPC [message #12269] Thu, 14 July 2011 17:56
StefanoSpataro is currently offline  StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino
first-grade participant

From: *to.infn.it
Hi,
trying to explore the problems in tpc reconstruction, I have explored the results from the tpc riemann before and after the kalman fit. In particular I have plotted, for eta_c events:

cbmsim.Draw("TrackPreFit.getMom().Mag()>>pre(100,0,2)");
cbmsim.Draw("TrackPostFit.getMom().Mag()>>post(100,0,2)");


The following is the result:

index.php?t=getfile&id=6511&private=0

It is not clear to me why so many tracks are shifted below 0.1 GeV, and they are cut away from the PidCorrelator (which has a cut 0.1 < p < 10 GeV/c). This could cause the problems with low efficiency.
Could you please investigate about? They are for sure screwed. The final distribution with TrackPostFitComplete is quite strange, at the end.


  • Attachment: test2.gif
    (Size: 6.07KB, Downloaded 430 times)
 
Read Message icon5.gif
Previous Topic: Psi3770 study with run802 of tpc in gridka
Next Topic: source of low efficiency of eta_c reconstruction with TPC
Goto Forum:
  


Current Time: Wed Oct 20 14:52:28 CEST 2021

Total time taken to generate the page: 0.02018 seconds