TtSemiLepEvtPartons Class Reference

Class to fill partons in a well defined order for semi-leptonic ttbar events. More...

#include "AnalysisDataFormats/TopObjects/interface/TtSemiLepEvtPartons.h"

Inheritance diagram for TtSemiLepEvtPartons:

Public Types
enum	{   LightQ, LightQBar, HadB, LepB,   Lepton }

Public Member Functions
	TtSemiLepEvtPartons (const std::vector< std::string > &partonsToIgnore=std::vector< std::string >())
	default constructor More...
std::vector< const reco::Candidate * >	vec (const TtGenEvent &genEvt) const override
	return vector of partons in the order defined in the corresponding enum More...
Public Member Functions inherited from TtEventPartons
void	expand (std::vector< int > &vec) const
	insert dummy index -3 for all partons that were chosen to be ignored More...
	TtEventPartons ()=default
	default constructor More...
virtual	~TtEventPartons ()=default
	default destructor More...

Additional Inherited Members
Protected Member Functions inherited from TtEventPartons
reco::Candidate *	dummyCandidatePtr () const
	return pointer to an empty reco::Candidate More...
void	prune (std::vector< const reco::Candidate * > &vec) const
	erase partons from vector if they where chosen to be ignored More...
Protected Attributes inherited from TtEventPartons
std::vector< bool >	ignorePartons_
	flag partons that were chosen not to be used More...

Detailed Description

Class to fill partons in a well defined order for semi-leptonic ttbar events.

This class is mainly used for the jet-parton matching in TopTools.

Definition at line 21 of file TtSemiLepEvtPartons.h.

Member Enumeration Documentation

anonymous enum

semi-leptonic parton enum used to define the order in the vector for lepton and jet combinatorics

Enumerator
LightQ
LightQBar
HadB
LepB
Lepton

Definition at line 25 of file TtSemiLepEvtPartons.h.

{ LightQ, LightQBar, HadB, LepB, Lepton };

Constructor & Destructor Documentation

TtSemiLepEvtPartons::TtSemiLepEvtPartons

(

const std::vector< std::string > &

partonsToIgnore = std::vector<std::string>()

)

default constructor

Definition at line 6 of file TtSemiLepEvtPartons.cc.

References Exception, HadB, mps_fire::i, TtEventPartons::ignorePartons_, LepB, LightQ, LightQBar, and str.

                                                                                    {
  // default: use all partons
  for (unsigned int i = 0; i < 4; i++)
    ignorePartons_.push_back(false);
  // read vector of strings and flag partons to be ignored
  for (std::vector<std::string>::const_iterator str = partonsToIgnore.begin(); str != partonsToIgnore.end(); ++str) {
    if ((*str) == "LightQ")
      ignorePartons_[LightQ] = true;
    else if ((*str) == "LightQBar")
      ignorePartons_[LightQBar] = true;
    else if ((*str) == "HadB")
      ignorePartons_[HadB] = true;
    else if ((*str) == "LepB")
      ignorePartons_[LepB] = true;
    else
      throw cms::Exception("Configuration")
          << "The following string in partonsToIgnore is not supported: " << (*str) << "\n";
  }
}

Member Function Documentation

std::vector< const reco::Candidate * > TtSemiLepEvtPartons::vec ( const TtGenEvent &  genEvt ) const

overridevirtual

return vector of partons in the order defined in the corresponding enum

Implements TtEventPartons.

Definition at line 26 of file TtSemiLepEvtPartons.cc.

References TtEventPartons::dummyCandidatePtr(), HadB, TtGenEvent::hadronicDecayB(), TtGenEvent::hadronicDecayQuark(), TtGenEvent::hadronicDecayQuarkBar(), mps_fire::i, TtGenEvent::isSemiLeptonic(), LepB, TtGenEvent::leptonicDecayB(), LightQ, LightQBar, and TtEventPartons::prune().

                                                                                       {
  std::vector<const reco::Candidate*> vec;

  if (genEvt.isSemiLeptonic()) {
    // fill vector with partons from genEvent
    // (use enum for positions of the partons in the vector)
    vec.resize(4);
    vec[LightQ] = genEvt.hadronicDecayQuark() ? genEvt.hadronicDecayQuark() : dummyCandidatePtr();
    vec[LightQBar] = genEvt.hadronicDecayQuarkBar() ? genEvt.hadronicDecayQuarkBar() : dummyCandidatePtr();
    vec[HadB] = genEvt.hadronicDecayB() ? genEvt.hadronicDecayB() : dummyCandidatePtr();
    vec[LepB] = genEvt.leptonicDecayB() ? genEvt.leptonicDecayB() : dummyCandidatePtr();
  } else {
    // fill vector with dummy objects if the event is not semi-leptonic ttbar
    for (unsigned i = 0; i < 4; i++)
      vec.push_back(dummyCandidatePtr());
  }

  // erase partons from vector if they where chosen to be ignored
  prune(vec);

  return vec;
}