Difference: NotesInPreparation (9 vs. 10)

Software in CMSSW

RecoPixelVZero/PixelVZeroFinding

This is a fast V0- and conversion finder using PixelTracks. Actually it works with reco::Tracks provided all the relevant fields are filled. A new data format VZero and its VZeroCollection was defined and put into DataFormats/TrackReco.

1000 special events have been produced which contain 10 K_S⁰, 10 Λ and 10 γ, all of them in the ranges -2<η<2 and 2 GeV/c<p_T<4 GeV/c. The events with PixelTracks are available at /afs/kfki.hu/scratch/sikler/cmssw/pixeltracks.root.

Note that due to the default setting of GlobalTrackingRegion (float ptMin = 1., float originRadius = 0.2) the track reconstruction is limited. This is why no dE/dx calculation was included for the identification of protons from Λs: it would not have helped at higher momenta. Of course all that can be substantially enhanced with low p_T tracking. An associator class is not included yet.

• Installation:
  • scramv1 project CMSSW CMSSW_0_8_0
  • cd CMSSW_0_8_0/src
  • Get the file src.tgz from the list of attachments below
  • tar -xvzf src.tgz
  • cd RecoPixelVZero/PixelVZeroFinding/test

• Compilation:
  • eval `scramv1 runtime -csh`
  • scramv1 --debug build

• Execution:
  • eval `scramv1 runtime -csh`
  • cmsRun test.cfg

• Control plots:
  • root -q -b test.C
  • Look at the produced test.ps