PVertexerParams.h

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// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
// This software is distributed under the terms of the GNU General Public
// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
//
// In applying this license CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
 
 
#ifndef ALICEO2_PVERTEXER_PARAMS_H
#define ALICEO2_PVERTEXER_PARAMS_H
 
#include "CommonUtils/ConfigurableParam.h"
#include "CommonUtils/ConfigurableParamHelper.h"
 
namespace o2
{
namespace vertexing
{
 
// These are configurable params for Primary Vertexer
struct PVertexerParams : public o2::conf::ConfigurableParamHelper<PVertexerParams> {
  static constexpr float kDefTukey = 4.685f; 
 
  float sysErrY2 = 0.; 
  float sysErrZ2 = 0.; 
 
  // DBSCAN clustering settings
  float dbscanMaxDist2 = 9.;   
  float dbscanDeltaT = -0.9;   
  float dbscanAdaptCoef = 0.1; 
  float dbscanMaxSigZCorPoint = 0.1; 
 
  int maxVerticesPerCluster = 10; 
  int maxTrialsPerCluster = 100;  
  long maxTimeMSPerCluster = 10000; 
 
  // track selection
  float meanVertexExtraErrSelection = 0.02; 
  float dcaTolerance = 1.3; 
  float pullIniCut = 9;     
  float maxTimeErrorMUS = 10.0; 
  float trackMaxX = 5.;         
  int minIBHits = 1.;           
 
  // histogramming and its weigths params
  float histoBinZSize = 0.05;       
  float histoBinTSize = 0.05;       
  float addTimeSigma2 = 0.1 * 0.1;  
  float addZSigma2 = 0.005 * 0.005; 
 
  // fitting parameters
  float meanVertexExtraErrConstraint = 0.; 
  bool useMeanVertexConstraint = true; 
  float tukey = kDefTukey;             
  float iniScale2 = 5.;              
  float minScale2 = 1.;              
  float acceptableScale2 = 4.;       
  float maxScale2 = 50;              
  float upscaleFactor = 9.;          
  float slowConvergenceFactor = 0.5; 
 
  // cleanup
  bool applyDebrisReduction = true;        
  bool applyReattachment = true;           
 
  float timeMarginReattach = 1.;           
 
  float maxTDiffDebris = 7.0;              
  float maxZDiffDebris = 1.0;              
  float maxMultRatDebris = 0.05;           
  float maxChi2TZDebris = 2000.;           
  float addTimeSigma2Debris = 0.05 * 0.05; 
  float addZSigma2Debris = 0.005 * 0.005;  
 
  // extra debris reduction cut, ignored if maxTDiffDebrisExtra == 0. The maxTDiffDebrisExtra must not exceed maxTDiffDebris
  float maxTDiffDebrisExtra = 0;                
  float maxZDiffDebrisExtra = 0.05;             
  float maxMultRatDebrisExtra = 1.0;            
  float maxChi2TZDebrisExtra = 100.;            
  float addTimeSigma2DebrisExtra = 225.;        
  float addZSigma2DebrisExtra = 1.e-3;          
 
  float maxITSOnlyFraction = 1.0; 
  float minITSOnlyFraction = 0.0; 
  //
  // MAD clean up (median abs. deviation in T and Z)
  float maxTMAD = -1.; 
  float minTMAD = -1.; 
  float maxZMAD = -1.; 
  float minZMAD = -1.; 
 
  // validation with externally provided InteractionRecords (e.g. from FT0)
  int minNContributorsForIRcutIni = -1; 
  int minNContributorsForIRcut = 10;    
  float maxTError = 0.2;                
  float minTError = 0.003;              
  float nSigmaTimeCut = 4.;             
  float timeBiasMS = 0;                 
  //
  bool doBCValidation = true; 
  //
  // stopping condition params
  float maxChi2Mean = 10.;          
  int minTracksPerVtx = 2;          
  int maxIterations = 20;           
  int maxNScaleIncreased = 2;       
  int maxNScaleSlowConvergence = 3; 
  bool useTimeInChi2 = true;        
 
  // track vertex time-wise association
  float nSigmaTimeTrack = 4.;       
  float timeMarginTrackTime = 0.5;  
  float timeMarginVertexTime = 0.0; 
 
  O2ParamDef(PVertexerParams, "pvertexer");
};
 
} // namespace vertexing
} // end namespace o2
 
#endif