TtGenEvent Class Reference

Class derived from the TopGenEvent for ttbar events. More...

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

Inheritance diagram for TtGenEvent:

Public Member Functions
bool	fromGluonFusion () const
	check if the tops were produced from a pair of gluons More...
bool	fromQuarkAnnihilation () const
	check if the tops were produced from qqbar More...
std::pair< WDecay::LeptonType, WDecay::LeptonType >	fullLeptonicChannel () const
const reco::GenParticle *	hadronicDecayB (bool excludeTauLeptons=false) const
	get b of hadronic decay branch More...
const reco::GenParticle *	hadronicDecayQuark (bool invertFlavor=false) const
	get light quark of hadronic decay branch More...
const reco::GenParticle *	hadronicDecayQuarkBar () const
	get light anti-quark of hadronic decay branch More...
const reco::GenParticle *	hadronicDecayTop (bool excludeTauLeptons=false) const
	get top of hadronic decay branch More...
std::vector< const reco::GenParticle * >	hadronicDecayTopRadiation (bool excludeTauLeptons=false) const
	gluons as radiated from the hadronicly decaying top quark More...
const reco::GenParticle *	hadronicDecayW (bool excludeTauLeptons=false) const
	get W of hadronic decay branch More...
bool	isFullHadronic (bool excludeTauLeptons=false) const
	check if the event can be classified as full hadronic More...
bool	isFullLeptonic (bool excludeTauLeptons=false) const
	check if the event can be classified as full leptonic More...
bool	isFullLeptonic (WDecay::LeptonType typeA, WDecay::LeptonType typeB) const
	check if the event is full leptonic with the lepton being of typeA or typeB irrelevant of order; all leptons including taus are allowed More...
bool	isSemiLeptonic (bool excludeTauLeptons=false) const
	check if the event can be classified as semi-laptonic More...
bool	isSemiLeptonic (WDecay::LeptonType typeA) const
	check if the event is semi-leptonic with the lepton being of typeA; all leptons including taus are allowed More...
bool	isSemiLeptonic (WDecay::LeptonType typeA, WDecay::LeptonType typeB) const
	check if the event is semi-leptonic with the lepton being of typeA or typeB; all leptons including taus are allowed More...
bool	isTtBar () const
	check if the event can be classified as ttbar More...
const reco::GenParticle *	lepton (bool excludeTauLeptons=false) const
	get lepton for semi-leptonic or full leptonic decays More...
const reco::GenParticle *	leptonBar (bool excludeTauLeptons=false) const
	get anti-lepton for semi-leptonic or full leptonic decays More...
const reco::GenParticle *	leptonicDecayB (bool excludeTauLeptons=false) const
	get b of leptonic decay branch More...
const reco::GenParticle *	leptonicDecayTop (bool excludeTauLeptons=false) const
	get top of leptonic decay branch More...
std::vector< const reco::GenParticle * >	leptonicDecayTopRadiation (bool excludeTauLeptons=false) const
	gluons as radiated from the leptonicly decaying top quark More...
const reco::GenParticle *	leptonicDecayW (bool excludeTauLeptons=false) const
	get W of leptonic decay branch More...
const reco::GenParticle *	neutrino (bool excludeTauLeptons=false) const
	get neutrino for semi-leptonic or full leptonic decays More...
const reco::GenParticle *	neutrinoBar (bool excludeTauLeptons=false) const
	get anti-neutrino for semi-leptonic or full leptonic decays More...
WDecay::LeptonType	semiLeptonicChannel () const
	return decay channel; all leptons including taus are allowed More...
const reco::GenParticle *	singleLepton (bool excludeTauLeptons=false) const
	return single lepton if available; 0 else More...
const reco::GenParticle *	singleNeutrino (bool excludeTauLeptons=false) const
	return single neutrino if available; 0 else More...
const math::XYZTLorentzVector *	topPair () const
	return combined 4-vector of top and topBar More...
	TtGenEvent ()
	empty constructor More...
	TtGenEvent (reco::GenParticleRefProd &decaySubset, reco::GenParticleRefProd &initSubset)
	default constructor from decaySubset and initSubset More...
virtual	~TtGenEvent ()
	default destructor More...
Public Member Functions inherited from TopGenEvent
const reco::GenParticle *	b () const
	return b quark if available; 0 else More...
const reco::GenParticle *	bBar () const
	return anti-b quark if available; 0 else More...
const reco::GenParticle *	candidate (int id, unsigned int parentId=0) const
	get candidate with given pdg id if available; 0 else More...
const reco::GenParticle *	daughterQuarkBarOfWMinus () const
	return anti-quark daughter of anti-W boson More...
const reco::GenParticle *	daughterQuarkBarOfWPlus () const
	return anti-quark daughter of W boson More...
const reco::GenParticle *	daughterQuarkOfTop (bool invertCharge=false) const
	return daughter quark of top quark (which can have flavor b, s or d) More...
const reco::GenParticle *	daughterQuarkOfTopBar () const
	return daughter quark of anti-top quark (which can have flavor b, s or d) More...
const reco::GenParticle *	daughterQuarkOfWMinus () const
	return quark daughter of anti-W boson More...
const reco::GenParticle *	daughterQuarkOfWPlus (bool invertQuarkCharge=false, bool invertBosonCharge=false) const
	return quark daughter quark of W boson More...
const reco::GenParticle *	eMinus () const
	return electron if available; 0 else More...
const reco::GenParticle *	ePlus () const
	return positron if available; 0 else More...
const reco::GenParticleCollection &	initialPartons () const
	return particles of initial partons More...
std::vector< const reco::GenParticle * >	lightQuarks (bool includingBQuarks=false) const
	return all light quarks or all quarks including b's More...
const reco::GenParticle *	muMinus () const
	return muon if available; 0 else More...
const reco::GenParticle *	muPlus () const
	return anti-muon if available; 0 else More...
int	numberOfBQuarks (bool fromTopQuark=true) const
	return number of b quarks in the decay chain More...
int	numberOfLeptons (bool fromWBoson=true) const
	return number of leptons in the decay chain More...
int	numberOfLeptons (WDecay::LeptonType type, bool fromWBoson=true) const
	return number of leptons in the decay chain More...
const reco::GenParticleCollection &	particles () const
	return particles of decay chain More...
void	print () const
std::vector< const reco::GenParticle * >	radiatedGluons (int pdgId) const
	return radiated gluons from particle with pdgId More...
const reco::GenParticle *	tauMinus () const
	return tau if available; 0 else More...
const reco::GenParticle *	tauPlus () const
	return anti-tau if available; 0 else More...
const reco::GenParticle *	top () const
	return top if available; 0 else More...
const reco::GenParticle *	topBar () const
	return anti-top if available; 0 else More...
	TopGenEvent ()
	empty constructor More...
	TopGenEvent (reco::GenParticleRefProd &decaySubset, reco::GenParticleRefProd &iniSubset)
	default constructor More...
std::vector< const reco::GenParticle * >	topSisters () const
	return number of top anti-top sisters More...
const reco::GenParticle *	wMinus () const
	return W minus if available; 0 else More...
const reco::GenParticle *	wPlus () const
	return W plus if available; 0 else More...
virtual	~TopGenEvent ()
	default destructor More...

Protected Attributes
math::XYZTLorentzVector	topPair_
	combined 4-vector of top and topBar More...
Protected Attributes inherited from TopGenEvent
reco::GenParticleRefProd	initPartons_
	reference to the list of initial partons (has to be kept in the event!) More...
reco::GenParticleRefProd	parts_
	reference to the top decay chain (has to be kept in the event!) More...

Private Member Functions
bool	isNumberOfLeptons (bool excludeTauLeptons, int nlep) const

Detailed Description

Class derived from the TopGenEvent for ttbar events.

The structure holds reference information to the generator particles of the decay chains for each top quark and of the initial partons and provides access and administration. The derived class contains a few additional getters with respect to its base class.

Definition at line 18 of file TtGenEvent.h.

Constructor & Destructor Documentation

TtGenEvent::TtGenEvent ( )

inline

empty constructor

Definition at line 23 of file TtGenEvent.h.

{};

TtGenEvent::TtGenEvent	(	reco::GenParticleRefProd &	decaySubset,
		reco::GenParticleRefProd &	initSubset
	)

default constructor from decaySubset and initSubset

Definition at line 10 of file TtGenEvent.cc.

References TopDecaySubset_cfi::decaySubset, TopGenEvent::initPartons_, TopInitSubset_cfi::initSubset, p4, TopGenEvent::parts_, TopGenEvent::top(), TopGenEvent::topBar(), and topPair_.

{
  parts_ = decaySubset;
  initPartons_= initSubset;
  if(top() && topBar())
    topPair_ = math::XYZTLorentzVector(top()->p4()+topBar()->p4());
}

virtual TtGenEvent::~TtGenEvent ( )

inlinevirtual

default destructor

Definition at line 27 of file TtGenEvent.h.

{};

Member Function Documentation

bool TtGenEvent::fromGluonFusion

(

)

const

check if the tops were produced from a pair of gluons

Definition at line 19 of file TtGenEvent.cc.

References TopGenEvent::initPartons_, and benchmark_cfg::pdgId.

{
  const reco::GenParticleCollection& initPartsColl = *initPartons_;
  if(initPartsColl.size()==2)
    if(initPartsColl[0].pdgId()==21 && initPartsColl[1].pdgId()==21)
      return true;
  return false;
}

bool TtGenEvent::fromQuarkAnnihilation

(

)

const

check if the tops were produced from qqbar

Definition at line 29 of file TtGenEvent.cc.

References funct::abs(), TopGenEvent::initPartons_, benchmark_cfg::pdgId, and TopDecayID::tID.

{
  const reco::GenParticleCollection& initPartsColl = *initPartons_;
  if(initPartsColl.size()==2)
    if(std::abs(initPartsColl[0].pdgId())<TopDecayID::tID && initPartsColl[0].pdgId()==-initPartsColl[1].pdgId())
      return true;
  return false;
}

std::pair< WDecay::LeptonType, WDecay::LeptonType > TtGenEvent::fullLeptonicChannel

(

)

const

Definition at line 51 of file TtGenEvent.cc.

References funct::abs(), TopDecayID::elecID, isFullLeptonic(), WDecay::kElec, WDecay::kMuon, WDecay::kNone, WDecay::kTau, lepton(), leptonBar(), TopDecayID::muonID, benchmark_cfg::pdgId, and TopDecayID::tauID.

Referenced by isFullLeptonic().

{
  WDecay::LeptonType typeA=WDecay::kNone, typeB=WDecay::kNone;  
  if( isFullLeptonic() ){
    if( lepton() ){
      if( std::abs(lepton()->pdgId())==TopDecayID::elecID ) typeA=WDecay::kElec;
      if( std::abs(lepton()->pdgId())==TopDecayID::muonID ) typeA=WDecay::kMuon;
      if( std::abs(lepton()->pdgId())==TopDecayID::tauID  ) typeA=WDecay::kTau;      
    }
    if( leptonBar() ){
      if( std::abs(leptonBar()->pdgId())==TopDecayID::elecID ) typeB=WDecay::kElec;
      if( std::abs(leptonBar()->pdgId())==TopDecayID::muonID ) typeB=WDecay::kMuon;
      if( std::abs(leptonBar()->pdgId())==TopDecayID::tauID  ) typeB=WDecay::kTau;      
    }
  }
  return ( std::pair<WDecay::LeptonType,WDecay::LeptonType>(typeA, typeB) );
}

const reco::GenParticle * TtGenEvent::hadronicDecayB

(

bool

excludeTauLeptons = false

)

const

get b of hadronic decay branch

Definition at line 196 of file TtGenEvent.cc.

References funct::abs(), TopDecayID::bID, reco::flavour(), i, TopGenEvent::parts_, benchmark_cfg::pdgId, and singleLepton().

Referenced by TtSemiLepEvtPartons::vec().

{
  const reco::GenParticle* cand=0;
  if( singleLepton(excludeTauLeptons) ){
    const reco::GenParticleCollection& partsColl = *parts_;
    const reco::GenParticle& singleLep = *singleLepton(excludeTauLeptons);
    for (unsigned int i = 0; i < partsColl.size(); ++i) {
      if (std::abs(partsColl[i].pdgId())==TopDecayID::bID && 
      reco::flavour(singleLep)==reco::flavour(partsColl[i])) {
        cand = &partsColl[i];
      }
    }
  }
  return cand;
}

const reco::GenParticle * TtGenEvent::hadronicDecayQuark

(

bool

invertFlavor = false

)

const

get light quark of hadronic decay branch

Definition at line 166 of file TtGenEvent.cc.

References funct::abs(), edm::hlt::Exception, reco::flavour(), edm::errors::InvalidReference, TopGenEvent::parts_, singleLepton(), TopDecayID::tID, w, and TopDecayID::WID.

Referenced by hadronicDecayQuarkBar(), and TtSemiLepEvtPartons::vec().

{
  const reco::GenParticle* cand=0;
  // catch W boson and check its daughters for a quark; 
  // make sure the decay is semi-leptonic first; this 
  // only makes sense if taus are not excluded from the 
  // decision
  if( singleLepton(false) ){
    for(reco::GenParticleCollection::const_iterator w=parts_->begin(); w!=parts_->end(); ++w){
      if( std::abs( w->pdgId() )==TopDecayID::WID ){
    // make sure that the particle is a W daughter
    for(reco::GenParticle::const_iterator wd=w->begin(); wd!=w->end(); ++wd){ 
      // make sure that the parton is a quark
      if( std::abs(wd->pdgId())<TopDecayID::tID ){
        if( invertFlavor?reco::flavour(*wd)<0:reco::flavour(*wd)>0 ){
          cand = dynamic_cast<const reco::GenParticle* > (&(*wd));
          if(cand == 0){
        throw edm::Exception( edm::errors::InvalidReference, "Not a GenParticle" );
          }
          break;
        }
      }
    }
      }
    }
  }
  return cand;
}

const reco::GenParticle* TtGenEvent::hadronicDecayQuarkBar ( ) const

inline

get light anti-quark of hadronic decay branch

Definition at line 72 of file TtGenEvent.h.

References hadronicDecayQuark().

Referenced by TtSemiLepEvtPartons::vec().

{return hadronicDecayQuark(true); };

const reco::GenParticle * TtGenEvent::hadronicDecayTop

(

bool

excludeTauLeptons = false

)

const

get top of hadronic decay branch

Definition at line 231 of file TtGenEvent.cc.

References funct::abs(), reco::flavour(), i, TopGenEvent::parts_, benchmark_cfg::pdgId, singleLepton(), and TopDecayID::tID.

Referenced by hadronicDecayTopRadiation().

{
  const reco::GenParticle* cand=0;
  if( singleLepton(excludeTauLeptons) ){
    const reco::GenParticleCollection& partsColl = *parts_;
    const reco::GenParticle& singleLep = *singleLepton(excludeTauLeptons);
    for (unsigned int i = 0; i < partsColl.size(); ++i) {
      if (std::abs(partsColl[i].pdgId())==TopDecayID::tID &&
          reco::flavour(singleLep)==reco::flavour(partsColl[i])) {
        cand = &partsColl[i];
      }
    }
  }
  return cand;
}

std::vector< const reco::GenParticle * > TtGenEvent::hadronicDecayTopRadiation

(

bool

excludeTauLeptons = false

)

const

gluons as radiated from the hadronicly decaying top quark

Definition at line 307 of file TtGenEvent.cc.

References hadronicDecayTop(), benchmark_cfg::pdgId, TopGenEvent::radiatedGluons(), and TopDecayID::tID.

                                                                                                   {
  if( hadronicDecayTop(excludeTauLeptons) ){
    return (hadronicDecayTop(excludeTauLeptons)->pdgId()>0 ? radiatedGluons(TopDecayID::tID) : radiatedGluons(-TopDecayID::tID));
  }
  std::vector<const reco::GenParticle*> rad;
  return (rad);
}

const reco::GenParticle * TtGenEvent::hadronicDecayW

(

bool

excludeTauLeptons = false

)

const

get W of hadronic decay branch

Definition at line 213 of file TtGenEvent.cc.

References funct::abs(), reco::flavour(), i, TopGenEvent::parts_, benchmark_cfg::pdgId, singleLepton(), and TopDecayID::WID.

{
  const reco::GenParticle* cand=0;
  if( singleLepton(excludeTauLeptons) ){
    const reco::GenParticleCollection& partsColl = *parts_;
    const reco::GenParticle& singleLep = *singleLepton(excludeTauLeptons);
    for (unsigned int i = 0; i < partsColl.size(); ++i) {
      if (std::abs(partsColl[i].pdgId())==TopDecayID::WID && 
          reco::flavour(singleLep) != -reco::flavour(partsColl[i])) { 
    // PDG Id:13=mu- 24=W+ (+24)->(-13) (-24)->(+13) opposite sign
    cand = &partsColl[i];
      }
    }
  }
  return cand;
}

bool TtGenEvent::isFullHadronic ( bool  excludeTauLeptons = false ) const

inline

check if the event can be classified as full hadronic

Definition at line 36 of file TtGenEvent.h.

References isNumberOfLeptons(), and isTtBar().

Referenced by TtFullHadEvtPartons::vec().

{ return isTtBar() ? isNumberOfLeptons(excludeTauLeptons, 0) : false;}

bool TtGenEvent::isFullLeptonic ( bool  excludeTauLeptons = false ) const

inline

check if the event can be classified as full leptonic

Definition at line 40 of file TtGenEvent.h.

References isNumberOfLeptons(), and isTtBar().

Referenced by fullLeptonicChannel(), and TtFullLepEvtPartons::vec().

{ return isTtBar() ? isNumberOfLeptons(excludeTauLeptons, 2) : false;}

bool TtGenEvent::isFullLeptonic ( WDecay::LeptonType  typeA, WDecay::LeptonType  typeB  ) const

inline

check if the event is full leptonic with the lepton being of typeA or typeB irrelevant of order; all leptons including taus are allowed

Definition at line 102 of file TtGenEvent.h.

References first, fullLeptonicChannel(), and edm::second().

{
  return ( (fullLeptonicChannel().first==typeA && fullLeptonicChannel().second==typeB)||
       (fullLeptonicChannel().first==typeB && fullLeptonicChannel().second==typeA));
}

bool TtGenEvent::isNumberOfLeptons ( bool  excludeTauLeptons, int  nlep  ) const

inlineprivate

check whether the number of leptons among the daughters of the W boson is nlep or not; there is an option to exclude taus from the list of leptons to consider

Definition at line 98 of file TtGenEvent.h.

References WDecay::kTau, and TopGenEvent::numberOfLeptons().

Referenced by isFullHadronic(), isFullLeptonic(), and isSemiLeptonic().

{return excludeTauLeptons ? (numberOfLeptons()-numberOfLeptons(WDecay::kTau))==nlep : numberOfLeptons()==nlep;}

bool TtGenEvent::isSemiLeptonic ( bool  excludeTauLeptons = false ) const

inline

check if the event can be classified as semi-laptonic

Definition at line 38 of file TtGenEvent.h.

References isNumberOfLeptons(), and isTtBar().

Referenced by semiLeptonicChannel(), singleLepton(), singleNeutrino(), and TtSemiLepEvtPartons::vec().

{ return isTtBar() ? isNumberOfLeptons(excludeTauLeptons, 1) : false;}

bool TtGenEvent::isSemiLeptonic ( WDecay::LeptonType  typeA ) const

inline

check if the event is semi-leptonic with the lepton being of typeA; all leptons including taus are allowed

Definition at line 45 of file TtGenEvent.h.

References semiLeptonicChannel().

{ return semiLeptonicChannel()==typeA ? true : false; };

bool TtGenEvent::isSemiLeptonic ( WDecay::LeptonType  typeA, WDecay::LeptonType  typeB  ) const

inline

check if the event is semi-leptonic with the lepton being of typeA or typeB; all leptons including taus are allowed

Definition at line 47 of file TtGenEvent.h.

References semiLeptonicChannel().

{ return (semiLeptonicChannel()==typeA || semiLeptonicChannel()==typeB)? true : false; };

bool TtGenEvent::isTtBar ( ) const

inline

check if the event can be classified as ttbar

Definition at line 30 of file TtGenEvent.h.

References TopGenEvent::top(), and TopGenEvent::topBar().

Referenced by isFullHadronic(), isFullLeptonic(), and isSemiLeptonic().

{return (top() && topBar());}

const reco::GenParticle * TtGenEvent::lepton

(

bool

excludeTauLeptons = false

)

const

get lepton for semi-leptonic or full leptonic decays

Definition at line 70 of file TtGenEvent.cc.

References funct::abs(), reco::flavour(), i, reco::isLepton(), TopGenEvent::parts_, benchmark_cfg::pdgId, and TopDecayID::WID.

Referenced by fullLeptonicChannel().

{
  const reco::GenParticle* cand = 0;
  const reco::GenParticleCollection& partsColl = *parts_;
  for (unsigned int i = 0; i < partsColl.size(); ++i) {
    if (reco::isLepton(partsColl[i]) && partsColl[i].mother() &&
    std::abs(partsColl[i].mother()->pdgId())==TopDecayID::WID) {
      if(reco::flavour(partsColl[i])>0){
    cand = &partsColl[i];
      }
    }
  }
  return cand;
}

const reco::GenParticle * TtGenEvent::leptonBar

(

bool

excludeTauLeptons = false

)

const

get anti-lepton for semi-leptonic or full leptonic decays

Definition at line 86 of file TtGenEvent.cc.

References funct::abs(), reco::flavour(), i, reco::isLepton(), TopGenEvent::parts_, benchmark_cfg::pdgId, and TopDecayID::WID.

Referenced by fullLeptonicChannel().

{
  const reco::GenParticle* cand = 0;
  const reco::GenParticleCollection& partsColl = *parts_;
  for (unsigned int i = 0; i < partsColl.size(); ++i) {
    if (reco::isLepton(partsColl[i]) && partsColl[i].mother() &&
    std::abs(partsColl[i].mother()->pdgId())==TopDecayID::WID) {
      if(reco::flavour(partsColl[i])<0){
    cand = &partsColl[i];
      }
    }
  }
  return cand;
}

const reco::GenParticle * TtGenEvent::leptonicDecayB

(

bool

excludeTauLeptons = false

)

const

get b of leptonic decay branch

Definition at line 248 of file TtGenEvent.cc.

References funct::abs(), TopDecayID::bID, reco::flavour(), i, TopGenEvent::parts_, benchmark_cfg::pdgId, and singleLepton().

Referenced by TtSemiLepEvtPartons::vec().

{
  const reco::GenParticle* cand=0;
  if( singleLepton(excludeTauLeptons) ){
    const reco::GenParticleCollection& partsColl = *parts_;
    const reco::GenParticle& singleLep = *singleLepton(excludeTauLeptons);
    for (unsigned int i = 0; i < partsColl.size(); ++i) {
      if (std::abs(partsColl[i].pdgId())==TopDecayID::bID &&
          reco::flavour(singleLep)!=reco::flavour(partsColl[i])) {
        cand = &partsColl[i];
      }
    }
  }
  return cand;
}

const reco::GenParticle * TtGenEvent::leptonicDecayTop

(

bool

excludeTauLeptons = false

)

const

get top of leptonic decay branch

Definition at line 283 of file TtGenEvent.cc.

References funct::abs(), reco::flavour(), i, TopGenEvent::parts_, benchmark_cfg::pdgId, singleLepton(), and TopDecayID::tID.

Referenced by leptonicDecayTopRadiation().

{
  const reco::GenParticle* cand=0;
  if( singleLepton(excludeTauLeptons) ){
    const reco::GenParticleCollection& partsColl = *parts_;
    const reco::GenParticle& singleLep = *singleLepton(excludeTauLeptons);
    for( unsigned int i = 0; i < partsColl.size(); ++i ){
      if( std::abs(partsColl[i].pdgId())==TopDecayID::tID &&
          reco::flavour(singleLep)!=reco::flavour(partsColl[i]) ){
        cand = &partsColl[i];
      }
    }
  }
  return cand;
}

std::vector< const reco::GenParticle * > TtGenEvent::leptonicDecayTopRadiation

(

bool

excludeTauLeptons = false

)

const

gluons as radiated from the leptonicly decaying top quark

Definition at line 299 of file TtGenEvent.cc.

References leptonicDecayTop(), benchmark_cfg::pdgId, TopGenEvent::radiatedGluons(), and TopDecayID::tID.

                                                                                                   {
  if( leptonicDecayTop(excludeTauLeptons) ){
    return (leptonicDecayTop(excludeTauLeptons)->pdgId()>0 ? radiatedGluons(TopDecayID::tID) : radiatedGluons(-TopDecayID::tID));
  }
  std::vector<const reco::GenParticle*> rad;
  return (rad);
}

const reco::GenParticle * TtGenEvent::leptonicDecayW

(

bool

excludeTauLeptons = false

)

const

get W of leptonic decay branch

Definition at line 265 of file TtGenEvent.cc.

References funct::abs(), reco::flavour(), i, TopGenEvent::parts_, benchmark_cfg::pdgId, singleLepton(), and TopDecayID::WID.

{
  const reco::GenParticle* cand=0;
  if( singleLepton(excludeTauLeptons) ){
    const reco::GenParticleCollection& partsColl = *parts_;
    const reco::GenParticle& singleLep = *singleLepton(excludeTauLeptons);
    for (unsigned int i = 0; i < partsColl.size(); ++i) {
      if (std::abs(partsColl[i].pdgId())==TopDecayID::WID &&
          reco::flavour(singleLep) == - reco::flavour(partsColl[i])) { 
    // PDG Id:13=mu- 24=W+ (+24)->(-13) (-24)->(+13) opposite sign
        cand = &partsColl[i];
      }
    }
  }
  return cand;
}

const reco::GenParticle * TtGenEvent::neutrino

(

bool

excludeTauLeptons = false

)

const

get neutrino for semi-leptonic or full leptonic decays

Definition at line 118 of file TtGenEvent.cc.

References funct::abs(), reco::flavour(), i, reco::isNeutrino(), TopGenEvent::parts_, benchmark_cfg::pdgId, and TopDecayID::WID.

{
  const reco::GenParticle* cand=0;
  const reco::GenParticleCollection & partsColl = *parts_;
  for (unsigned int i = 0; i < partsColl.size(); ++i) {
    if (reco::isNeutrino(partsColl[i]) && partsColl[i].mother() &&
    std::abs(partsColl[i].mother()->pdgId())==TopDecayID::WID) {
      if(reco::flavour(partsColl[i])>0){
    cand = &partsColl[i];
      }
    }
  }
  return cand;
}

const reco::GenParticle * TtGenEvent::neutrinoBar

(

bool

excludeTauLeptons = false

)

const

get anti-neutrino for semi-leptonic or full leptonic decays

Definition at line 134 of file TtGenEvent.cc.

References funct::abs(), reco::flavour(), i, reco::isNeutrino(), TopGenEvent::parts_, benchmark_cfg::pdgId, and TopDecayID::WID.

{
  const reco::GenParticle* cand=0;
  const reco::GenParticleCollection & partsColl = *parts_;
  for (unsigned int i = 0; i < partsColl.size(); ++i) {
    if (reco::isNeutrino(partsColl[i]) && partsColl[i].mother() &&
    std::abs(partsColl[i].mother()->pdgId())==TopDecayID::WID) {
      if(reco::flavour(partsColl[i])<0){
    cand = &partsColl[i];
      }
    }
  }
  return cand;
}

WDecay::LeptonType TtGenEvent::semiLeptonicChannel

(

)

const

return decay channel; all leptons including taus are allowed

Definition at line 39 of file TtGenEvent.cc.

References funct::abs(), TopDecayID::elecID, isSemiLeptonic(), WDecay::kElec, WDecay::kMuon, WDecay::kNone, WDecay::kTau, TopDecayID::muonID, benchmark_cfg::pdgId, singleLepton(), and TopDecayID::tauID.

Referenced by isSemiLeptonic().

{
  WDecay::LeptonType type=WDecay::kNone;
  if( isSemiLeptonic() && singleLepton() ){
    if( std::abs(singleLepton()->pdgId())==TopDecayID::elecID ) type=WDecay::kElec;
    if( std::abs(singleLepton()->pdgId())==TopDecayID::muonID ) type=WDecay::kMuon;
    if( std::abs(singleLepton()->pdgId())==TopDecayID::tauID  ) type=WDecay::kTau;
  }
  return type;
}

const reco::GenParticle * TtGenEvent::singleLepton

(

bool

excludeTauLeptons = false

)

const

return single lepton if available; 0 else

Definition at line 102 of file TtGenEvent.cc.

References funct::abs(), i, reco::isLepton(), isSemiLeptonic(), TopGenEvent::parts_, benchmark_cfg::pdgId, and TopDecayID::WID.

Referenced by hadronicDecayB(), hadronicDecayQuark(), hadronicDecayTop(), hadronicDecayW(), leptonicDecayB(), leptonicDecayTop(), leptonicDecayW(), and semiLeptonicChannel().

{
  const reco::GenParticle* cand = 0;
  if( isSemiLeptonic(excludeTauLeptons) ){
    const reco::GenParticleCollection& partsColl = *parts_;
    for (unsigned int i = 0; i < partsColl.size(); ++i) {
      if (reco::isLepton(partsColl[i]) && partsColl[i].mother() &&
      std::abs(partsColl[i].mother()->pdgId())==TopDecayID::WID) {
        cand = &partsColl[i];
      }
    }
  }
  return cand;
}

const reco::GenParticle * TtGenEvent::singleNeutrino

(

bool

excludeTauLeptons = false

)

const

return single neutrino if available; 0 else

Definition at line 150 of file TtGenEvent.cc.

References funct::abs(), i, reco::isNeutrino(), isSemiLeptonic(), TopGenEvent::parts_, benchmark_cfg::pdgId, and TopDecayID::WID.

{
  const reco::GenParticle* cand=0;
  if( isSemiLeptonic(excludeTauLeptons) ) {
    const reco::GenParticleCollection & partsColl = *parts_;
    for (unsigned int i = 0; i < partsColl.size(); ++i) {
      if (reco::isNeutrino(partsColl[i]) && partsColl[i].mother() &&
      std::abs(partsColl[i].mother()->pdgId())==TopDecayID::WID) {
        cand = &partsColl[i];
      }
    }
  }
  return cand;
}

const math::XYZTLorentzVector* TtGenEvent::topPair ( ) const

inline

return combined 4-vector of top and topBar

Definition at line 87 of file TtGenEvent.h.

{ return isTtBar() ? &topPair_ : 0; };

Member Data Documentation

math::XYZTLorentzVector TtGenEvent::topPair_

protected

combined 4-vector of top and topBar

Definition at line 87 of file TtGenEvent.h.

Referenced by TtGenEvent().