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JetProbabilityComputer Class Reference

#include <RecoBTag/ImpactParameter/interface/JetProbabilityComputer.h>

Inheritance diagram for JetProbabilityComputer:

List of all members.

Public Member Functions
float	discriminator (const TagInfoHelper &ti) const
double	jetProbability (const std::vector< float > &v) const
	JetProbabilityComputer (const edm::ParameterSet &parameters)
Private Attributes
double	m_cutMaxDecayLen
double	m_cutMaxDistToAxis
double	m_deltaR
int	m_ipType
double	m_minTrackProb
reco::TrackBase::TrackQuality	m_trackQuality
int	m_trackSign
bool	m_useAllQualities

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Detailed Description

Definition at line 14 of file JetProbabilityComputer.h.

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Constructor & Destructor Documentation

JetProbabilityComputer::JetProbabilityComputer

(

const edm::ParameterSet &

parameters

)

[inline]

Definition at line 17 of file JetProbabilityComputer.h.

References edm::ParameterSet::getParameter(), m_cutMaxDecayLen, m_cutMaxDistToAxis, m_deltaR, m_ipType, m_minTrackProb, m_trackQuality, m_trackSign, m_useAllQualities, reco::TrackBase::qualityByName(), and JetTagComputer::uses().

  { 
     m_ipType           = parameters.getParameter<int>("impactParameterType");
     m_minTrackProb     = parameters.getParameter<double>("minimumProbability");
     m_deltaR           = parameters.getParameter<double>("deltaR");
     m_trackSign        = parameters.getParameter<int>("trackIpSign");
     m_cutMaxDecayLen   = parameters.getParameter<double>("maximumDecayLength"); 
     m_cutMaxDistToAxis = parameters.getParameter<double>("maximumDistanceToJetAxis"); 
     //
     // access track quality class; "any" takes everything
     //
     std::string trackQualityType = parameters.getParameter<std::string>("trackQualityClass"); //used
     m_trackQuality =  reco::TrackBase::qualityByName(trackQualityType);
     m_useAllQualities = false;
     if (trackQualityType == "any" || 
         trackQualityType == "Any" || 
         trackQualityType == "ANY" ) m_useAllQualities = true;

     uses("ipTagInfos");
  }

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Member Function Documentation

float JetProbabilityComputer::discriminator

(

const TagInfoHelper &

ti

)

const [inline, virtual]

Reimplemented from JetTagComputer.

Definition at line 38 of file JetProbabilityComputer.h.

References JetTagComputer::TagInfoHelper::get(), i, reco::TrackIPTagInfo::impactParameterData(), it, reco::JTATagInfo::jet(), jetProbability(), m_cutMaxDecayLen, m_cutMaxDistToAxis, m_deltaR, m_ipType, m_trackQuality, m_trackSign, m_useAllQualities, muonGeometry::mag(), p, p4, reco::TrackIPTagInfo::primaryVertex(), reco::TrackIPTagInfo::probabilities(), pv, reco::TrackIPTagInfo::selectedTracks(), and tracks.

   {
      const reco::TrackIPTagInfo & tkip = ti.get<reco::TrackIPTagInfo>();

      const edm::RefVector<reco::TrackCollection> & tracks(tkip.selectedTracks());
      const std::vector<float> & allProbabilities((tkip.probabilities(m_ipType)));
      const std::vector<reco::TrackIPTagInfo::TrackIPData> & impactParameters((tkip.impactParameterData()));
    
      if (tkip.primaryVertex().isNull()) return 0 ; 
    
      GlobalPoint pv(tkip.primaryVertex()->position().x(),tkip.primaryVertex()->position().y(),tkip.primaryVertex()->position().z());

      std::vector<float> probabilities;
      int i=0;
      for(std::vector<float>::const_iterator it = allProbabilities.begin(); it!=allProbabilities.end(); ++it, i++)
       {
        if ( fabs(impactParameters[i].distanceToJetAxis) < m_cutMaxDistToAxis  &&        // distance to JetAxis
             (impactParameters[i].closestToJetAxis - pv).mag() < m_cutMaxDecayLen  &&      // max decay len
             (m_useAllQualities  == true || (*tracks[i]).quality(m_trackQuality)) // use selected track qualities
        )
         {
          float p;
          if(m_trackSign ==0 )
          { 
           if (*it >=0){p=*it/2.;}else{p=1.+*it/2.;}
          }
          else if(m_trackSign > 0)
          {
            if(*it >=0 ) p=*it; else continue; 
          } else
          {
           if(*it <=0 ) p= -*it; else continue; 
          } 
          if(m_deltaR <= 0  || ROOT::Math::VectorUtil::DeltaR((*tkip.jet()).p4().Vect(), (*tracks[i]).momentum()) < m_deltaR )
            probabilities.push_back(p);
         }
       }
      return jetProbability(probabilities); 
   }

double JetProbabilityComputer::jetProbability

(

const std::vector< float > &

v

)

const [inline]

Definition at line 78 of file JetProbabilityComputer.h.

References GenMuonPlsPt100GeV_cfg::cout, lat::endl(), funct::exp(), edm::es::l(), funct::log(), m_minTrackProb, max, and min.

Referenced by discriminator().

{
   int ngoodtracks=v.size();
   double SumJet=0.;

  for(std::vector<float>::const_iterator q = v.begin(); q != v.end(); q++){
    SumJet+=(*q>m_minTrackProb)?log(*q):log(m_minTrackProb);
  }

  double ProbJet;
  double Loginvlog=0;

  if(SumJet<0.){
    if(ngoodtracks>=2){
      Loginvlog=log(-SumJet);
    }
    double Prob=1.;
    double lfact=1.;
    for(int l=1; l!=ngoodtracks; l++){
       lfact*=l;
      Prob+=exp(l*Loginvlog-log(1.*lfact));
    }
    double LogProb=log(Prob);
    ProbJet=
      std::min(exp(std::max(LogProb+SumJet,-30.)),1.);
  }else{
    ProbJet=1.;
  }
  if(ProbJet>1)
   std::cout << "ProbJet too high: "  << ProbJet << std::endl;

  //double LogProbJet=-log(ProbJet);
  //  //return 1.-ProbJet;
      return -log10(ProbJet)/4.;
  }

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Member Data Documentation

double JetProbabilityComputer::m_cutMaxDecayLen [private]

Definition at line 118 of file JetProbabilityComputer.h.

Referenced by discriminator(), and JetProbabilityComputer().

double JetProbabilityComputer::m_cutMaxDistToAxis [private]

Definition at line 119 of file JetProbabilityComputer.h.

Referenced by discriminator(), and JetProbabilityComputer().

double JetProbabilityComputer::m_deltaR [private]

Definition at line 116 of file JetProbabilityComputer.h.

Referenced by discriminator(), and JetProbabilityComputer().

int JetProbabilityComputer::m_ipType [private]

Definition at line 115 of file JetProbabilityComputer.h.

Referenced by discriminator(), and JetProbabilityComputer().

double JetProbabilityComputer::m_minTrackProb [private]

Definition at line 114 of file JetProbabilityComputer.h.

Referenced by jetProbability(), and JetProbabilityComputer().

reco::TrackBase::TrackQuality JetProbabilityComputer::m_trackQuality [private]

Definition at line 120 of file JetProbabilityComputer.h.

Referenced by discriminator(), and JetProbabilityComputer().

int JetProbabilityComputer::m_trackSign [private]

Definition at line 117 of file JetProbabilityComputer.h.

Referenced by discriminator(), and JetProbabilityComputer().

bool JetProbabilityComputer::m_useAllQualities [private]

Definition at line 121 of file JetProbabilityComputer.h.

Referenced by discriminator(), and JetProbabilityComputer().

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The documentation for this class was generated from the following file:

• RecoBTag/ImpactParameter/interface/JetProbabilityComputer.h

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