GSI Forum - RDF feed
type: channel
description: GSI Helmholtzzentrum für Schwerionenforschung
items: Condition for tracks to hit FWD EMC
items: Re: Condition for tracks to hit FWD EMC

Condition for tracks to hit FWD EMC
type: item
description: Dear all, in the file PndPidEmcInfo.cxx, there is a condition saying if ((emcModule == 3) && (helix->GetZ() < 165.)) continue; // consider tracks only from last gem plane for FWD This basically ensures that tracks without a hit in the last GEM plane are not considered to constitute pidChargedCandidates. However, even if tracks have only STT/MVD hits, they can still pass between the gap of GEM and EMC barrel and produce a cluster in the EMC forward detector. Therefore I would consider this condition redundant. Is there any reason for this that I do not see or can it be removed? Thanks and all best, Chris
creator: pandachris
date: 2016-10-06T13:58:20-00:00

Re: Condition for tracks to hit FWD EMC
type: item
description: Quote: This basically ensures that tracks without a hit in the last GEM plane are not considered to constitute pidChargedCandidates. This ensures that tracks without a hit in the last GEM plane are not correlated to the FWD EMC, saving a lot of CPU time. But the pidChargedCandidate is created. Can you please evaluate (DPM?) how many tracks w/o hits in the last GEM plane are really hitting the FWD EMC?
creator: StefanoSpataro
date: 2016-10-06T14:03:36-00:00