Notes in preparation

Author	Title	Files	Comment
Ferenc Siklér	Reconstruction of low pT charged particles with the pixel detector		first draft
Ferenc Siklér	Reconstruction of V0s and photon conversions with the pixel detector		first draft
Ferenc Siklér	Particle identification using energy loss in the pixel detector		first draft
Gergely Patay	Phi meson reconstruction using low pT tracking and dE/dx in the pixel detector		0th draft

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

-- FerencSikler - 20 Jun 2006