FixedAreaIsolationCone.h

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#ifndef PhysicsTools_IsolationUtils_FixedAreaIsolationCone_h
#define PhysicsTools_IsolationUtils_FixedAreaIsolationCone_h
 
// -*- C++ -*-
//
// Package:
// Class:      FixedAreaIsolationCone
//
//
// Original Author: Christian Veelken, UC Davis
//         Created: Wed May 16 13:47:40 CST 2007
//
//
 
// ROOT include files
#include <Math/RootFinder.h>
#include <Math/RootFinderAlgorithms.h>
 
// CMSSW include files
#include "PhysicsTools/IsolationUtils/interface/ConeAreaFunction.h"
#include "PhysicsTools/IsolationUtils/interface/ConeAreaRootFunction.h"
 
//
// class declaration
//
 
class FixedAreaIsolationCone {
public:
  // default constructor
  FixedAreaIsolationCone();
 
  // destructor
  ~FixedAreaIsolationCone();
 
  // set acceptance limit for particle reconstruction
  // (this will enlarge the isolation cone near the acceptance boundary
  //  such that the area in the region where particles can be reconstructed is constant;
  //  i.e. guarantees flat efficiency near the acceptance boundary)
  void setAcceptanceLimit(double etaMaxTrackingAcceptance);
 
  double operator()(
      double coneAxisTheta, double coneAxisPhi, double openingAngleSignalCone, double areaIsolationCone, int& error);
 
private:
  ConeAreaFunction areaFunctionSignalCone_;
  ConeAreaRootFunction areaRootFunctionIsolationCone_;
  ROOT::Math::RootFinder areaRootFinderIsolationCone_;
 
  static const unsigned int debugLevel_ = 0;
};
 
#endif