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00001 import FWCore.ParameterSet.Config as cms 00002 00003 generalV0Candidates = cms.EDProducer("V0Producer", 00004 00005 # InputTag that tells which TrackCollection to use for vertexing 00006 trackRecoAlgorithm = cms.InputTag('generalTracks'), 00007 00008 # These bools decide whether or not to reconstruct 00009 # specific V0 particles 00010 selectKshorts = cms.bool(True), 00011 selectLambdas = cms.bool(True), 00012 00013 # Recommend leaving this one as is. 00014 vertexFitter = cms.InputTag('KalmanVertexFitter'), 00015 00016 # set to true, uses tracks refit by the KVF for V0Candidate kinematics 00017 # NOTE: useSmoothing is automatically set to FALSE 00018 # if using the AdaptiveVertexFitter (which is NOT recommended) 00019 useSmoothing = cms.bool(True), 00020 00021 # Select tracks using TrackBase::TrackQuality. 00022 # Select ALL tracks by leaving this vstring empty, which 00023 # is equivalent to using 'loose' 00024 #trackQualities = cms.vstring('highPurity', 'goodIterative'), 00025 trackQualities = cms.vstring('loose'), 00026 00027 # The next parameters are cut values. 00028 # All distances are in cm, all energies in GeV, as usual. 00029 00030 # --Track quality/compatibility cuts-- 00031 # Normalized track Chi2 < 00032 tkChi2Cut = cms.double(5.0), 00033 # Number of valid hits on track >= 00034 tkNhitsCut = cms.int32(6), 00035 # Track impact parameter significance > 00036 impactParameterSigCut = cms.double(2.), 00037 # We calculate the PCA of the tracks quickly in RPhi, extrapolating 00038 # the z position as well, before vertexing. Used in the following 2 cuts: 00039 # m_pipi calculated at PCA of tracks < 00040 mPiPiCut = cms.double(0.6), 00041 # PCA distance between tracks < 00042 tkDCACut = cms.double(1.), 00043 00044 # --V0 Vertex cuts-- 00045 # Vertex chi2 < 00046 vtxChi2Cut = cms.double(7.0), 00047 # Lambda collinearity cut 00048 # (UNUSED) 00049 collinearityCut = cms.double(0.02), 00050 # Vertex radius cut > 00051 # (UNUSED) 00052 rVtxCut = cms.double(0.0), 00053 # V0 decay length from primary cut > 00054 # (UNUSED) 00055 lVtxCut = cms.double(0.0), 00056 # Radial vertex significance > 00057 vtxSignificance2DCut = cms.double(15.0), 00058 # 3D vertex significance using primary vertex 00059 # (UNUSED) 00060 vtxSignificance3DCut = cms.double(0.0), 00061 # V0 mass window, Candidate mass must be within these values of 00062 # the PDG mass to be stored in the collection 00063 kShortMassCut = cms.double(0.07), 00064 lambdaMassCut = cms.double(0.05), 00065 # Mass window cut using normalized mass (mass / massError) 00066 # (UNUSED) 00067 kShortNormalizedMassCut = cms.double(0.0), 00068 lambdaNormalizedMassCut = cms.double(0.0), 00069 # We check if either track has a hit inside (radially) the vertex position 00070 # minus this number times the sigma of the vertex fit 00071 # NOTE: Set this to -1 to disable this cut, which MUST be done 00072 # if you want to run V0Producer on the AOD track collection! 00073 innerHitPosCut = cms.double(4.) 00074 ) 00075 00076
1.7.3