GSI Forum
GSI Helmholtzzentrum für Schwerionenforschung

Home » PANDA » PandaRoot » General » Problems with new GEM Geometry (New GEM geometry causes a drop in the reconstruction efficiency of delayed particles)
Problems with new GEM Geometry [message #22477] Tue, 17 April 2018 11:22 Go to previous message
Tobias Stockmanns is currently offline  Tobias Stockmanns
Messages: 489
Registered: May 2007
first-grade participant
From: *
Dear PandaRooters and GEM experts,

in the analysis of the reaction: pbar p -> Xi Xibar pi pibar -> 3 pi 3 pibar p pbar we see a significant drop in the reconstruction efficiency depending on the GEM geometry we use. With the old geometry (gem_3Stations_Tube.root) we get 18.3% (15.2% MCTruth matched) of reconstructable events with all final state particles in the event, while with the new geometry (gem_3Stations_realistic_v2.root) this value drops to 6.4% (4.3% MCTruth matched).

It is not clear if this is a real effect of the additional material introduced by the more realistic description of the GEMs or if there is still a bug in the geometry description which causes the drop of a factor 3.

It would be great if an expert on the GEMs could have a look.


Read Message
Read Message
Read Message
Read Message
Previous Topic: [FIXED] Produce ROOT file with FairRoot Structure
Next Topic: Job Submission on Kronos
Goto Forum:

Current Time: Tue Jul 23 13:25:13 CEST 2024

Total time taken to generate the page: 0.00771 seconds