Finds the origin of each heavy flavour hadron and associated jets to it. More...

#include <GenHFHadronMatcher.cc>

Inheritance diagram for GenHFHadronMatcher:

Public Member Functions
	GenHFHadronMatcher (const edm::ParameterSet &)
	constructor initialising producer products and config parameters More...

	~GenHFHadronMatcher ()

Public Member Functions inherited from edm::EDProducer
	EDProducer ()

ModuleDescription const &	moduleDescription () const

virtual	~EDProducer ()

Public Member Functions inherited from edm::ProducerBase
void	callWhenNewProductsRegistered (std::function< void(BranchDescription const &)> const &func)

	ProducerBase ()

void	registerProducts (ProducerBase , ProductRegistry , ModuleDescription const &)

std::function< void(BranchDescription const &)>	registrationCallback () const
	used by the fwk to register list of products More...

virtual	~ProducerBase ()

Public Member Functions inherited from edm::EDConsumerBase
std::vector< ConsumesInfo >	consumesInfo () const

	EDConsumerBase ()

ProductHolderIndexAndSkipBit	indexFrom (EDGetToken, BranchType, TypeID const &) const

void	itemsMayGet (BranchType, std::vector< ProductHolderIndexAndSkipBit > &) const

void	itemsToGet (BranchType, std::vector< ProductHolderIndexAndSkipBit > &) const

std::vector < ProductHolderIndexAndSkipBit > const &	itemsToGetFromEvent () const

void	labelsForToken (EDGetToken iToken, Labels &oLabels) const

void	modulesDependentUpon (std::string const &iProcessName, std::string const &iModuleLabel, bool iPrint, std::vector< char const * > &oModuleLabels) const

void	modulesWhoseProductsAreConsumed (std::vector< ModuleDescription const * > &modules, ProductRegistry const &preg, std::map< std::string, ModuleDescription const * > const &labelsToDesc, std::string const &processName) const

bool	registeredToConsume (ProductHolderIndex, bool, BranchType) const

bool	registeredToConsumeMany (TypeID const &, BranchType) const

void	updateLookup (BranchType iBranchType, ProductHolderIndexHelper const &)

virtual	~EDConsumerBase ()

Static Public Member Functions
static void	fillDescriptions (edm::ConfigurationDescriptions &descriptions)
	description of the run-time parameters More...

Static Public Member Functions inherited from edm::EDProducer
static const std::string &	baseType ()

static void	fillDescriptions (ConfigurationDescriptions &descriptions)

static void	prevalidate (ConfigurationDescriptions &descriptions)

Private Member Functions
int	analyzeMothers (const reco::Candidate thisParticle, int &topDaughterQId, int &topBarDaughterQId, std::vector< const reco::Candidate > &hadMothers, std::vector< std::vector< int > > &hadMothersIndices, std::set< const reco::Candidate * > *analyzedParticles, const int prevPartIndex)
	do a recursive search for the mother particles until the b-quark is found or the absolute mother is found More...

virtual void	beginJob ()

virtual void	beginLuminosityBlock (edm::LuminosityBlock &, edm::EventSetup const &)

virtual void	beginRun (edm::Run &, edm::EventSetup const &)

bool	checkForLoop (std::vector< const reco::Candidate * > &particleChain, const reco::Candidate *particle)

virtual void	endJob ()

virtual void	endLuminosityBlock (edm::LuminosityBlock &, edm::EventSetup const &)

virtual void	endRun (edm::Run &, edm::EventSetup const &)

std::vector< int >	findHadronJets (const reco::GenParticleCollection genParticles, const reco::JetFlavourInfoMatchingCollection jetFlavourInfos, std::vector< int > &hadIndex, std::vector< reco::GenParticle > &hadMothersGenPart, std::vector< std::vector< int > > &hadMothersIndices, std::vector< int > &hadLeptonIndex, std::vector< int > &hadLeptonHadIndex, std::vector< int > &hadLeptonViaTau, std::vector< int > &hadFlavour, std::vector< int > &hadFromTopWeakDecay, std::vector< int > &hadBHadronId)
	identify the jets that contain b-hadrons More...

int	findInMothers (int idx, std::vector< int > &mothChains, const std::vector< std::vector< int > > &hadMothersIndices, const std::vector< reco::GenParticle > &hadMothers, int status, int pdgId, bool pdgAbs, int stopId, int firstLast, bool verbose)
	helper function to find indices of particles with particular pdgId and status from the list of mothers of a given particle More...

bool	fixExtraSameFlavours (const unsigned int hadId, const std::vector< int > &hadIndices, const std::vector< reco::GenParticle > &hadMothers, const std::vector< std::vector< int > > &hadMothersIndices, const std::vector< int > &isFromTopWeakDecay, const std::vector< std::vector< int > > &LastQuarkIds, const std::vector< std::vector< int > > &LastQuarkMotherIds, std::vector< int > &lastQuarkIndices, std::vector< int > &hadronFlavour, std::set< int > &checkedHadronIds, const int lastQuarkIndex)

int	flavourSign (const int pdgId)
	Sign of the flavour (matter/antimatter) More...

std::string	getParticleName (int id) const

bool	hasHadronDaughter (const int flavour, const reco::Candidate *thisParticle)
	Check if the particle has bHadron among daughters. More...

int	idInList (std::vector< const reco::Candidate * > particleList, const reco::Candidate *particle)
	Check if the cpecified particle is already in the list of particles. More...

int	idInList (std::vector< int > list, const int value)

bool	isBaryonPdgId (const int flavour, const int pdgId)
	Check the pdgId if it represents a baryon of particular flavour. More...

bool	isHadron (const int flavour, const reco::Candidate *thisParticle)
	Check the pdgId of a given particle if it is a hadron. More...

bool	isHadronPdgId (const int flavour, const int pdgId)
	Check the pdgId if it represents a hadron of particular flavour. More...

bool	isMesonPdgId (const int flavour, const int pdgId)
	Check the pdgId if it represents a meson of particular flavour. More...

bool	isNeutralPdg (int pdgId)
	Check whether a given pdgId represents neutral particle. More...

virtual void	produce (edm::Event &, const edm::EventSetup &)

bool	putMotherIndex (std::vector< std::vector< int > > &hadMothersIndices, int partIndex, int mothIndex)
	puts mother index to the list of mothers of particle, if it isn't there already More...

Private Attributes
int	flavour_

std::string	flavourStr_

edm::EDGetTokenT < reco::GenParticleCollection >	genParticlesToken_

edm::EDGetTokenT < reco::JetFlavourInfoMatchingCollection >	jetFlavourInfosToken_

bool	noBBbarResonances_

bool	onlyJetClusteredHadrons_

edm::ESHandle< ParticleDataTable >	pdt_

Additional Inherited Members
Public Types inherited from edm::EDProducer
typedef EDProducer	ModuleType

Public Types inherited from edm::ProducerBase
typedef ProductRegistryHelper::TypeLabelList	TypeLabelList

Public Types inherited from edm::EDConsumerBase
typedef ProductLabels	Labels

Protected Member Functions inherited from edm::EDConsumerBase
template<typename ProductType , BranchType B = InEvent>
EDGetTokenT< ProductType >	consumes (edm::InputTag const &tag)

EDGetToken	consumes (const TypeToGet &id, edm::InputTag const &tag)

template<BranchType B>
EDGetToken	consumes (TypeToGet const &id, edm::InputTag const &tag)

ConsumesCollector	consumesCollector ()
	Use a ConsumesCollector to gather consumes information from helper functions. More...

template<typename ProductType , BranchType B = InEvent>
void	consumesMany ()

void	consumesMany (const TypeToGet &id)

template<BranchType B>
void	consumesMany (const TypeToGet &id)

template<typename ProductType , BranchType B = InEvent>
EDGetTokenT< ProductType >	mayConsume (edm::InputTag const &tag)

EDGetToken	mayConsume (const TypeToGet &id, edm::InputTag const &tag)

template<BranchType B>
EDGetToken	mayConsume (const TypeToGet &id, edm::InputTag const &tag)

Detailed Description

Finds the origin of each heavy flavour hadron and associated jets to it.

Starting from each consituent of each jet, tracks back in chain to find heavy flavour hadrons. From each hadron traces back until finds the b quark and its mother. For each hadron identifies the jet to which it was injected as a ghost hadron.

The description of the run-time parameters can be found at fillDescriptions()

The description of the products can be found at GenHFHadronMatcher()

Definition at line 58 of file GenHFHadronMatcher.cc.

Constructor & Destructor Documentation

GenHFHadronMatcher::GenHFHadronMatcher ( const edm::ParameterSet & cfg )

explicit

constructor initialising producer products and config parameters

Warning: Definition of b-hadron and anti-b-hadron: The term b-hadron and anti-b-hadron is in reference to the quark content and not to distinguish particles from anti-particles. Here a b-hadron contains a b-quark and an anti-b-hadron contains an anti-b-quark. For mesons this means an inversion with respect to the PDG definition, as mesons actually contain anti-b-quarks and anti-mesons contain b-quarks.

Definition at line 139 of file GenHFHadronMatcher.cc.

References funct::abs(), flavour_, flavourStr_, edm::ParameterSet::getParameter(), noBBbarResonances_, and onlyJetClusteredHadrons_.

                                                                    :
 genParticlesToken_(consumes<reco::GenParticleCollection>(cfg.getParameter<edm::InputTag>("genParticles"))),
 jetFlavourInfosToken_(consumes<reco::JetFlavourInfoMatchingCollection>(cfg.getParameter<edm::InputTag>("jetFlavourInfos")))
 {
     flavour_           = cfg.getParameter<int> ( "flavour" );
     noBBbarResonances_ = cfg.getParameter<bool> ( "noBBbarResonances" );
     onlyJetClusteredHadrons_ = cfg.getParameter<bool> ( "onlyJetClusteredHadrons" );
     
     flavour_ = std::abs( flavour_ ); // Make flavour independent of sign given in configuration
     if ( flavour_==5 ) {
         flavourStr_="B";
     } else if ( flavour_==4 ) {
         flavourStr_="C";
     } else {
         edm::LogError ( "GenHFHadronMatcher" ) << "Flavour option must be 4 (c-jet) or 5 (b-jet), but is: " << flavour_ << ". Correct this!";
     }
 
     // Hadron matching products
     produces< std::vector<reco::GenParticle> > ( "gen"+flavourStr_+"HadPlusMothers" ); // All mothers in all decay chains above any hadron of specified flavour
     produces< std::vector< std::vector<int> > > ( "gen"+flavourStr_+"HadPlusMothersIndices" ); // Indices of mothers of each hadMother
     produces< std::vector<int> > ( "gen"+flavourStr_+"HadIndex" ); // Index of hadron in the vector of hadMothers
     produces< std::vector<int> > ( "gen"+flavourStr_+"HadFlavour" ); // PdgId of the first non-b(c) quark mother with sign corresponding to hadron charge
     produces< std::vector<int> > ( "gen"+flavourStr_+"HadJetIndex" ); // Index of genJet matched to each hadron by jet clustering algorithm
     produces< std::vector<int> > ( "gen"+flavourStr_+"HadLeptonIndex" ); // Index of lepton found among the hadron decay products in the list of mothers
     produces< std::vector<int> > ( "gen"+flavourStr_+"HadLeptonHadronIndex" ); // Index of hadron the lepton is associated to
     produces< std::vector<int> > ( "gen"+flavourStr_+"HadLeptonViaTau" ); // Whether lepton comes directly from hadron or via tau decay
     produces< std::vector<int> > ( "gen"+flavourStr_+"HadFromTopWeakDecay" ); // Tells whether the hadron appears in the chain after top decay
     produces< std::vector<int> > ( "gen"+flavourStr_+"HadBHadronId" ); // Index of a b-hadron which the current hadron comes from (for c-hadrons)
 }

GenHFHadronMatcher::~GenHFHadronMatcher ( )

Definition at line 169 of file GenHFHadronMatcher.cc.

170 {

171 }

Member Function Documentation

int GenHFHadronMatcher::analyzeMothers	(	const reco::Candidate *	thisParticle,
		int &	topDaughterQId,
		int &	topBarDaughterQId,
		std::vector< const reco::Candidate * > &	hadMothers,
		std::vector< std::vector< int > > &	hadMothersIndices,
		std::set< const reco::Candidate * > *	analyzedParticles,
		const int	prevPartIndex
	)

private

do a recursive search for the mother particles until the b-quark is found or the absolute mother is found

the treatment of b-bar resonances depends on the global parameter noBBbarResonances_

Parameters

[in]	thisParticle	current particle from which starts the search of the hadron and all its mothers up to proton
[out]	hadron	the last hadron in the decay chain [that decays weekly]
[out]	lepton	lepton found in the current decay chain
[out]	topDaughterQId	Id of the top quark daughter b(c) quark
[out]	topBarDaughterQId	Id of the antitop quark daughter b(c) quark
[out]	hadMothers	list of all processed particles ending with proton
[out]	hadMothersIndices	list of i-vectors containing j-indices representing particles that are mothers of each i-particle from hadMothers
[out]	analyzedParticles	list of particles analysed in the chain [used for infinite loop detection]
[out]	prevPartIndex	index of the previous particle in the current chain [used for infinite loop detection]

Returns: index of hadron in the hadMothers list [-1 if no hadron found]

Definition at line 644 of file GenHFHadronMatcher.cc.

References funct::abs(), i, idInList(), cmsHarvester::index, reco::Candidate::mother(), reco::Candidate::numberOfMothers(), reco::Candidate::pdgId(), reco::Candidate::pt(), and putMotherIndex().

Referenced by findHadronJets().

 {
     // Getting the index of the particle which is a hadron in the first call
     int hadronIndex=-1; // Index of the hadron that is returned by this function
     int index = idInList( hadMothers, thisParticle );
     if ( index<0 ) { // If hadron is not in the list of mothers yet
         hadMothers.push_back ( thisParticle );
         hadronIndex=hadMothers.size()-1;
     } else {        // If hadron is in the list of mothers already
         hadronIndex=index;
     }
     
     int partIndex = -1;   // Index of particle being checked in the list of mothers
     partIndex = idInList( hadMothers, thisParticle );
 
     // Checking whether this particle is already in the chain of analyzed particles in order to identify a loop
     bool isLoop = false;
     if ( !analyzedParticles ) {
         analyzedParticles = new std::set<const reco::Candidate*>;
     }
     for ( unsigned int i=0; i<analyzedParticles->size(); i++ ) {
         if ( analyzedParticles->count ( thisParticle ) <=0 ) {
             continue;
         }
         isLoop = true;
         break;
     }
     
     // If a loop has been detected
     if ( isLoop ) {
         if ( prevPartIndex>=0 ) {
             putMotherIndex ( hadMothersIndices, prevPartIndex, -1 );    // Setting mother index of previous particle to -1
         }
         return hadronIndex;     // Stopping further processing of the current chain
     }
     analyzedParticles->insert ( thisParticle );
     
     // Putting the mothers to the list of mothers
     for ( size_t iMother = 0; iMother < thisParticle->numberOfMothers(); ++iMother ) {
         const reco::Candidate* mother = thisParticle->mother ( iMother );
         int mothIndex = idInList( hadMothers, mother );
         if ( mothIndex == partIndex && partIndex>=0 ) {
             continue;       // Skipping the mother that is its own daughter
         }
 
     // If this mother isn't yet in the list and hadron or lepton is in the list
         if ( mothIndex<0 ) {
             hadMothers.push_back ( mother );
             mothIndex=hadMothers.size()-1;
         }
     // If hadron has already been found in current chain and the mother isn't a duplicate of the particle being checked
         if ( mothIndex!=partIndex && partIndex>=0 ) {
             putMotherIndex ( hadMothersIndices, partIndex, mothIndex );         // Putting the index of mother for current particle
         }
         analyzeMothers ( mother, topDaughterQId, topBarDaughterQId, hadMothers, hadMothersIndices, analyzedParticles, partIndex );
         // Setting the id of the particle which is a quark from the top decay
         if(std::abs(mother->pdgId())==6) {
             int& bId = mother->pdgId() < 0 ? topBarDaughterQId : topDaughterQId;
             int thisFlav = std::abs(thisParticle->pdgId());
             if( bId<0){
                 if(thisFlav <= 5) bId = partIndex; 
             } else {
                 int bIdFlav = std::abs(hadMothers.at(bId)->pdgId());
                 if( bIdFlav != 5 && thisFlav == 5) bId = partIndex;
                 else if( thisFlav == 5 && thisParticle->pt() > hadMothers.at(bId)->pt() ) bId = partIndex;
             }           // If daughter quark of the top not found yet
         }           // If the mother is a top quark and hadron has been found
     }         // End of loop over mothers
 
     analyzedParticles->erase ( thisParticle );      // Removing current particle from the current chain that is being analyzed
 
     if ( partIndex<0 ) {
         return hadronIndex;    // Safety check
     }
 
     // Adding -1 to the list of mother indices for current particle if it has no mothers (for consistency between numbering of indices and mothers)
     if ( (int)thisParticle->numberOfMothers() <=0) {
         putMotherIndex ( hadMothersIndices, partIndex, -1 );
     }
 
     return hadronIndex;
 
 }

void GenHFHadronMatcher::beginJob ( void )

privatevirtual

Reimplemented from edm::EDProducer.

Definition at line 237 of file GenHFHadronMatcher.cc.

238 {

239 }

void GenHFHadronMatcher::beginLuminosityBlock	(	edm::LuminosityBlock &	,
		edm::EventSetup const &
	)

privatevirtual

Definition at line 258 of file GenHFHadronMatcher.cc.

259 {

260 }

void GenHFHadronMatcher::beginRun	(	edm::Run &	,
		edm::EventSetup const &
	)

privatevirtual

Definition at line 247 of file GenHFHadronMatcher.cc.

248 {

249 }

bool GenHFHadronMatcher::checkForLoop	(	std::vector< const reco::Candidate * > &	particleChain,
		const reco::Candidate *	particle
	)

private

void GenHFHadronMatcher::endJob ( void )

privatevirtual

Reimplemented from edm::EDProducer.

Definition at line 242 of file GenHFHadronMatcher.cc.

243 {

244 }

void GenHFHadronMatcher::endLuminosityBlock	(	edm::LuminosityBlock &	,
		edm::EventSetup const &
	)

privatevirtual

Definition at line 263 of file GenHFHadronMatcher.cc.

264 {

265 }

void GenHFHadronMatcher::endRun	(	edm::Run &	,
		edm::EventSetup const &
	)

privatevirtual

Definition at line 253 of file GenHFHadronMatcher.cc.

254 {

255 }

void GenHFHadronMatcher::fillDescriptions ( edm::ConfigurationDescriptions & descriptions )

static

description of the run-time parameters

Definition at line 179 of file GenHFHadronMatcher.cc.

References edm::ConfigurationDescriptions::add(), edm::ParameterSetDescription::add(), edm::false, and funct::true.

 {
     edm::ParameterSetDescription desc;
     desc.add<edm::InputTag>("genParticles")->setComment( "Collection of GenParticle objects which contains all particles produced in the event" );
     desc.add<edm::InputTag>("jetFlavourInfos")->setComment( "Output from the JetFlavour tool. Contains information about partons/hadrons/leptons associated to jets" );
     desc.add<bool> ( "noBBbarResonances",true )->setComment ( "Whether resonances should not be treated as hadrons" );
     desc.add<bool> ( "onlyJetClusteredHadrons",false )->setComment ( "Whether only hadrons that are matched to jets should be analysed. Runs x1000 faster in Sherpa" );
     desc.add<int> ( "flavour",5 )->setComment ( "Flavour of weakly decaying hadron that should be analysed (4-c, 5-b)" );
     descriptions.add ( "matchGenHFHadron",desc );
 }

std::vector< int > GenHFHadronMatcher::findHadronJets	(	const reco::GenParticleCollection *	genParticles,
		const reco::JetFlavourInfoMatchingCollection *	jetFlavourInfos,
		std::vector< int > &	hadIndex,
		std::vector< reco::GenParticle > &	hadMothers,
		std::vector< std::vector< int > > &	hadMothersIndices,
		std::vector< int > &	hadLeptonIndex,
		std::vector< int > &	hadLeptonHadIndex,
		std::vector< int > &	hadLeptonViaTau,
		std::vector< int > &	hadFlavour,
		std::vector< int > &	hadFromTopWeakDecay,
		std::vector< int > &	hadBHadronId
	)

private

identify the jets that contain b-hadrons

For each hadron all mothers from all levels and chains are analysed to find the quark or gluon from which the hadron has originated. This is done by searching through the generator particle decay tree starting from the hadron, performing checks for flavour and kinematic consistency. The hadrons that are not last in the decay chain (don't decay weakly) are skipped. Additionally for each hadron it is checked whether it comes from the top weak decay branch and whether it comes from some other b-hadron decay

b-bbar (c-cbar) resonances can either be considered as hadrons or not, depending on the configuration.

Parameters

[out]	hadIndex	vector of indices of found hadrons in hadMothers
[out]	hadMothers	vector of all mothers at all levels of each found hadron
[out]	hadMothersIndices	connection between each particle from hadMothers and its mothers
[out]	hadLeptonIndex	index of lepton among the hadMothers
[out]	hadLeptonHadIndex	index of hadron associated to each lepton
[out]	hadLeptonViaTau	whether lepton is from direct hadron->lepton or hadron->tau->lepton
[out]	hadFlavour	flavour of each found hadron
[out]	hadFromTopWeakDecay	whether each hadron contains the top quark in its decay chain [works only for B-Hadrons]
[out]	hadBHadronId	for each hadron - index of the ancestor b-hadron [-1 if hadron doesn't come from another b-hdaron]

Returns: vector of jet indices that were matched to each hadron [by the jet clustering algorithm]

Definition at line 291 of file GenHFHadronMatcher.cc.

References funct::abs(), analyzeMothers(), edm::AssociationVector< KeyRefProd, CVal, KeyRef, SizeType, KeyReferenceHelper >::begin(), edm::RefVector< C, T, F >::begin(), deltaR(), PFRecoTauDiscriminationAgainstElectronDeadECAL_cfi::dR, edm::AssociationVector< KeyRefProd, CVal, KeyRef, SizeType, KeyReferenceHelper >::end(), edm::RefVector< C, T, F >::end(), edm::false, spr::find(), findInMothers(), fixExtraSameFlavours(), flavour_, flavourSign(), reco::JetFlavourInfo::getbHadrons(), reco::JetFlavourInfo::getcHadrons(), hasHadronDaughter(), i, isHadron(), reco::CompositeRefCandidateT< D >::mother(), reco::Candidate::mother(), onlyJetClusteredHadrons_, SingleMuPt40Fwdv2_cfi_GEN_SIM::pdgId, reco::Candidate::pdgId(), and reco::LeafCandidate::pdgId().

Referenced by produce().

 {
     std::vector<int> hadJetIndex;
     std::vector<const reco::Candidate*> hadMothersCand;
 
     int topDaughterQId = -1;
     int topBarDaughterQId = -1;
     
     // Looping over all jets to get hadrons associated to them
     for(reco::JetFlavourInfoMatchingCollection::const_iterator i_info  = jetFlavourInfos->begin(); i_info != jetFlavourInfos->end(); ++i_info){
         reco::JetFlavourInfo jetInfo = i_info->second;
         const int jetIndex = i_info - jetFlavourInfos->begin();
         // Looping over each hadron associated with the jet and finding its origin
         const reco::GenParticleRefVector& hadronsInJet = flavour_==5 ? jetInfo.getbHadrons() : flavour_==4 ? jetInfo.getcHadrons() : reco::GenParticleRefVector();
         for(reco::GenParticleRefVector::const_iterator hadron = hadronsInJet.begin(); hadron != hadronsInJet.end(); ++hadron) {
             // Check that the hadron satisfies criteria configured in the module
             if(!isHadron ( flavour_, (&**hadron) )) continue;
             if(hasHadronDaughter ( flavour_, (reco::Candidate*)(&**hadron) )) continue;
             // Scanning the chain starting from the hadron
             int hadronIndex = analyzeMothers ( (reco::Candidate*)(&**hadron), topDaughterQId, topBarDaughterQId, hadMothersCand, hadMothersIndices, 0, -1 );
             // Storing the index of the hadron to the list
             hadIndex.push_back ( hadronIndex );
             hadJetIndex.push_back ( jetIndex );  // Putting jet index to the result list
         }
     }       // End of loop over jets
     
     // Access all hadrons which are not associated with jets, if requested
     if(!onlyJetClusteredHadrons_) {
         for(reco::GenParticleCollection::const_iterator i_particle = genParticles->begin(); i_particle != genParticles->end(); ++i_particle){
             const reco::GenParticle* thisParticle = &*i_particle;
             if(!isHadron(flavour_, thisParticle)) continue;
             // Skipping the hadron if it was already found directly from jets
             if(std::find(hadMothersCand.begin(), hadMothersCand.end(), thisParticle) != hadMothersCand.end()) continue;
             
             // Scanning the chain starting from the hadron
             int hadronIndex = analyzeMothers ( thisParticle, topDaughterQId, topBarDaughterQId, hadMothersCand, hadMothersIndices, 0, -1 );
             // Storing the index of the hadron to the list
             hadIndex.push_back ( hadronIndex );
             hadJetIndex.push_back ( -1 );  // Jet index undefined
         }
     }
     
     // Transfering Candidates to the list of processed particles for further analysis
     for ( int i=0; i< (int)hadMothersCand.size(); i++ ) {
         const reco::GenParticle* particle = dynamic_cast<const reco::GenParticle*>( hadMothersCand.at(i) );
         hadMothers.push_back(*particle);
     }
     
     // Adding leptons from hadron decays
     for(reco::GenParticleCollection::const_iterator i_particle = genParticles->begin(); i_particle != genParticles->end(); ++i_particle){
         const reco::GenParticle lepton = *i_particle;
         const int pdg_abs = lepton.pdgId();
         // Skipping if not a lepton: e/mu
         if(pdg_abs != 11 && pdg_abs != 13) continue;
         bool leptonViaTau = false;
         const reco::Candidate* leptonMother = lepton.mother();
         if(!leptonMother) continue;
         // Taking next mother if direct mother is a tau
         if(std::abs(leptonMother->pdgId()) == 15) {
             leptonViaTau = 1;
             leptonMother = leptonMother->mother();
         }
         // Skipping this lepton if its mother is not a proper hadron
         if(!isHadron(flavour_, leptonMother)) continue;
         // Finding the index of this hadron in the list of analysed particles
         size_t leptonHadronParticleIndex = std::find(hadMothersCand.begin(), hadMothersCand.end(), leptonMother) - hadMothersCand.begin();
         if(leptonHadronParticleIndex >= hadMothersCand.size()) continue;
         // Finding the actual hadron index among those that were found
         size_t leptonHadronIndex = std::find(hadIndex.begin(), hadIndex.end(), leptonHadronParticleIndex) - hadIndex.begin();
         if(leptonHadronIndex >= hadIndex.size()) continue;
         // Putting the lepton, its index and hadron index to the corresponding lists
         hadMothers.push_back(lepton);
         const int leptonIndex = hadMothersCand.size()-1;
         hadLeptonIndex.push_back(leptonIndex);
         hadLeptonViaTau.push_back(leptonViaTau);
         hadLeptonHadIndex.push_back(leptonHadronIndex);
     }
 
     // Checking mothers of hadrons in order to assign flags (where the hadron comes from)
     unsigned int nHad = hadIndex.size();
 
     std::vector<std::vector<int> > LastQuarkMotherIds;
     std::vector<std::vector<int> > LastQuarkIds;
     std::vector<int> lastQuarkIndices(nHad, -1);
 
     // Looping over all hadrons
     for ( unsigned int hadNum=0; hadNum<nHad; hadNum++ ) {
         unsigned int hadIdx = hadIndex.at(hadNum);   // Index of hadron in the hadMothers
 
         std::vector <int> FirstQuarkId;
         std::vector <int> LastQuarkId;
         std::vector <int> LastQuarkMotherId;
 
         const int hadronFlavourSign = flavourSign( hadMothers.at(hadIdx).pdgId() );
 
         // Searching only first quark in the chain with the same flavour as hadron
         if(hadronFlavourSign != 0) {
             findInMothers( hadIdx, FirstQuarkId, hadMothersIndices, hadMothers, 0, hadronFlavourSign*flavour_, false, -1, 1, false );
         }
         // Searching for quarks with both flavours since it is a bb/cc resonance
         else {
             findInMothers( hadIdx, FirstQuarkId, hadMothersIndices, hadMothers, 0, flavour_, false, -1, 1, false );
             findInMothers( hadIdx, FirstQuarkId, hadMothersIndices, hadMothers, 0, -1*flavour_, false, -1, 1, false );
         }
 
         // Finding last quark for each first quark
         for ( unsigned int qId=0; qId<FirstQuarkId.size(); qId++ ) {
             // Identifying the flavour of the first quark to find the last quark of the same flavour
             const int quarkFlavourSign = flavourSign( hadMothers.at(FirstQuarkId.at(qId)).pdgId() );
             // Finding last quark of the hadron starting from the first quark
             findInMothers( FirstQuarkId.at(qId), LastQuarkId, hadMothersIndices, hadMothers, 0, quarkFlavourSign*flavour_, false, -1, 2, false );
         }       // End of loop over all first quarks of the hadron
 
 
         // Setting initial flavour of the hadron
         int hadronFlavour = 0;
 
         // Initialising pairs of last quark index and its distance from the hadron (to sort by distance)
         std::vector<std::pair<double, int> > lastQuark_dR_id_pairs;
 
         // Finding the closest quark in dR
         for ( unsigned int qId = 0; qId < LastQuarkId.size(); qId++ ) {
             int qIdx = LastQuarkId.at(qId);
             // Calculating the dR between hadron and quark
             float dR = deltaR ( hadMothers.at(hadIdx).eta(),hadMothers.at(hadIdx).phi(),hadMothers.at(qIdx).eta(),hadMothers.at(qIdx).phi() );
 
             std::pair<double, int> dR_hadId_pair(dR,qIdx);
             lastQuark_dR_id_pairs.push_back(dR_hadId_pair);
         }       // End of loop over all last quarks of the hadron
 
         std::sort(lastQuark_dR_id_pairs.begin(), lastQuark_dR_id_pairs.end());
         
         if(lastQuark_dR_id_pairs.size() > 1) {
             double dRratio = (lastQuark_dR_id_pairs.at(1).first - lastQuark_dR_id_pairs.at(0).first)/lastQuark_dR_id_pairs.at(1).first;
             int qIdx_closest = lastQuark_dR_id_pairs.at(0).second;
             LastQuarkId.clear();
             if(dRratio>0.5) LastQuarkId.push_back(qIdx_closest); 
             else for(std::pair<double, int> qIdDrPair : lastQuark_dR_id_pairs) LastQuarkId.push_back(qIdDrPair.second);
         }
         for(int qIdx : LastQuarkId) {
             int qmIdx = hadMothersIndices.at(qIdx).at(0);
             LastQuarkMotherId.push_back(qmIdx);
         }
 
         if((int)LastQuarkId.size()>0) lastQuarkIndices.at(hadNum) = 0;     // Setting the first quark in array as a candidate if it exists
 
         LastQuarkIds.push_back( LastQuarkId );
 
         LastQuarkMotherIds.push_back ( LastQuarkMotherId );
 
         if(LastQuarkMotherId.size()<1) {
             hadronFlavour = 0;
         } else {
             int qIdx = LastQuarkId.at( lastQuarkIndices.at(hadNum) );
             int qFlav = flavourSign( hadMothers.at(qIdx).pdgId() );
             hadronFlavour = qFlav*std::abs( hadMothers.at( LastQuarkMotherId.at( lastQuarkIndices.at(hadNum) ) ).pdgId() );
         }
         hadFlavour.push_back(hadronFlavour);    // Adding hadron flavour to the list of flavours
         
         // Checking whether hadron comes from the Top weak decay
         int isFromTopWeakDecay = 1;
         std::vector <int> checkedParticles;
         if(hadFlavour.at(hadNum) != 0) {
             int lastQIndex = LastQuarkId.at(lastQuarkIndices.at(hadNum));
             bool fromTB = topDaughterQId >= 0 ? findInMothers( lastQIndex, checkedParticles, hadMothersIndices, hadMothers, -1, 0, false, topDaughterQId, 2, false ) >= 0 : false;
             checkedParticles.clear();
             bool fromTbarB = topBarDaughterQId >= 0 ? findInMothers( lastQIndex, checkedParticles, hadMothersIndices, hadMothers, -1, 0, false, topBarDaughterQId, 2, false) >= 0 : false;
             checkedParticles.clear();
             if(!fromTB && !fromTbarB) {
                 isFromTopWeakDecay = 0;
             }
         } else isFromTopWeakDecay = 2;
         hadFromTopWeakDecay.push_back(isFromTopWeakDecay);
         int bHadronMotherId = findInMothers( hadIdx, checkedParticles, hadMothersIndices, hadMothers, 0, 555555, true, -1, 1, false );
         hadBHadronId.push_back(bHadronMotherId);
         
 
         if(LastQuarkMotherId.size()>0) {
             std::set<int> checkedHadronIds;
             fixExtraSameFlavours(hadNum, hadIndex, hadMothers, hadMothersIndices, hadFromTopWeakDecay, LastQuarkIds, LastQuarkMotherIds, lastQuarkIndices, hadFlavour, checkedHadronIds, 0);
         }
         
     }   // End of loop over all hadrons
 
     return hadJetIndex;
 }

int GenHFHadronMatcher::findInMothers	(	int	idx,
		std::vector< int > &	mothChains,
		const std::vector< std::vector< int > > &	hadMothersIndices,
		const std::vector< reco::GenParticle > &	hadMothers,
		int	status,
		int	pdgId,
		bool	pdgAbs = `false`,
		int	stopId = `-1`,
		int	firstLast = `0`,
		bool	verbose = `false`
	)

private

helper function to find indices of particles with particular pdgId and status from the list of mothers of a given particle

Parameters

[in]	idx	index of particle, mothers of which should be searched
[in]	mothChains	vector of indices where the found mothers are stored
[in]	hadMothersIndices	list of indices pointing to mothers of each particle from list of mothers
[in]	hadMothers	vector of all hadron mother particles of all levels
[in]	status	status of mother that is being looked for
[in]	pdgId	pdgId of mother that is being looked for [flavour*111111 used to identify hadrons of particular flavour]
[in]	pdgAbs	whether the sign of pdgId should be taken into account
[in]	stopId	id of the particle in the hadMothers array after which the checking should stop
[in]	firstLast	should all(0), first(1) or last(2) occurances of the searched particle be stored
[in]	verbose	option to print every particle that is processed during the search

Returns: index of the found particle in the hadMothers array [-1 if the specified particle not found]

Definition at line 791 of file GenHFHadronMatcher.cc.

References funct::abs(), edm::false, spr::find(), i, customizeTrackingMonitorSeedNumber::idx, isHadronPdgId(), and funct::true.

Referenced by findHadronJets().

 {
     int foundStopId = -1;
     int pdg_1 = hadMothers.at(idx).pdgId();
 
     if ( (int)hadMothersIndices.size() <= idx ) {
         if ( verbose ) {
             printf ( " Stopping checking particle %d. No mothers are stored.\n",idx );
         }
         return -1;     // Skipping if no mothers are stored for this particle
     }
     
     if(std::abs(hadMothers.at( idx ).pdgId()) > 10 &&  std::abs(hadMothers.at( idx ).pdgId()) < 19) printf("Lepton: %d\n", hadMothers.at( idx ).pdgId());
 
     std::vector<int> mothers = hadMothersIndices.at(idx);
     unsigned int nMothers = mothers.size();
     bool isCorrect=false;       // Whether current particle is what is being searched
     if ( verbose ) {
         if ( std::abs( hadMothers.at(idx).pdgId() ) ==2212 ) {
             printf ( "Chk:  %d\tpdg: %d\tstatus: %d",idx, hadMothers.at(idx).pdgId(), hadMothers.at(idx).status() );
         } else {
             printf ( " Chk:  %d(%d mothers)\tpdg: %d\tstatus: %d\tPt: %.3f\tEta: %.3f",idx, nMothers, hadMothers.at(idx).pdgId(), hadMothers.at(idx).status(), hadMothers.at(idx).pt(),hadMothers.at(idx).eta() );
         }
     }
     bool hasCorrectMothers = true;
     if(nMothers<1) hasCorrectMothers=false; else if(mothers.at(0)<0) hasCorrectMothers=false;
     if(!hasCorrectMothers) {
         if(verbose) printf("    NO CORRECT MOTHER\n");
         return -1;
     }
     // Stopping if the particular particle has been found
     if(stopId>=0 && idx == stopId) return idx;
     
     // Stopping if the hadron of particular flavour has been found
     if(pdgId%111111==0 && pdgId!=0) {
         if(isHadronPdgId(pdgId/111111, hadMothers.at(idx).pdgId())) {
             return idx;
         }
     }
     
     // Checking whether current mother satisfies selection criteria
     if ( ( ( hadMothers.at(idx).pdgId() == pdgId && pdgAbs==false )
             || ( std::abs( hadMothers.at(idx).pdgId() ) == std::abs( pdgId ) && pdgAbs==true ) )
             && ( hadMothers.at(idx).status() == status || status==0 )
             && hasCorrectMothers ) {
         isCorrect=true;
         // Adding to the list of candidates if not there and if mother of this quark has correct flavour sign
         const bool inList = std::find(mothChains.begin(), mothChains.end(), idx) != mothChains.end();
         if ( !inList && mothers.at(0) >= 0 && ( hadMothers.at(idx).pdgId()*pdgId > 0 || !pdgAbs ) ) {
             if ( firstLast==0 || firstLast==1 ) {
                 mothChains.push_back(idx);
             }
             if ( verbose ) {
                 printf ( "   *" );
             }
         }
         if ( verbose ) {
             printf ( "   +++" );
         }
     }
     if ( verbose ) {
         printf ( "\n" );
     }
 
     if ( isCorrect && firstLast==1 ) {
         return -1;   // Stopping if only the first particle in the chain is looked for
     }
     
     // Checking next level mothers
     unsigned int nDifferingMothers = 0;
     for ( unsigned int i = 0; i < nMothers; i++ ) {
         int idx2 = mothers.at(i);
         if ( idx2 < 0 ) {
         if(verbose) printf("^^^ Has no mother\n");
             continue;    // Skipping if mother's id is -1 (no mother), that means current particle is a proton
         }
         if ( idx2 == idx ) {
         if(verbose) printf("^^^ Stored as its own mother\n");
             continue;    // Skipping if particle is stored as its own mother
         }
         int pdg_2 = hadMothers[idx2].pdgId();
         // Inverting the flavour if bb oscillation detected
         if ( isHadronPdgId(pdgId, pdg_1) && isHadronPdgId(pdgId, pdg_2) &&  pdg_1*pdg_2 < 0 ) {
             pdgId *= -1;
             if(verbose) printf("######### Inverting flavour of the hadron\n");
         }
     // Counting how many mothers are different from this particle
         if ( ( std::abs( pdg_2 ) != std::abs( pdgId ) && pdgAbs==true ) ||
              ( pdg_2 != pdgId && pdgAbs == false ) ) {
         nDifferingMothers++;
         }
 
         // Checking next level mother
         if ( verbose ) {
             printf ( "Checking mother %d out of %d mothers (%d -> %d), looking for pdgId: %d\n",i,nMothers,idx, idx2, pdgId );
         }
         if(firstLast==2 && pdg_1 != pdg_2) continue;    // Requiring the same flavour when finding the last quark
         foundStopId = findInMothers ( idx2, mothChains, hadMothersIndices, hadMothers, status, pdgId, pdgAbs, stopId, firstLast, verbose );
     }
     // Storing this particle if all its mothers are of another type and the last of its kind should be stored
     if(firstLast==2 && isCorrect && nDifferingMothers >= nMothers) {
         if ( verbose ) {
             printf ( "Checking particle %d once more to store it as the last quark\n",idx);
         }
         foundStopId = findInMothers ( idx, mothChains, hadMothersIndices, hadMothers, 0, pdgId, pdgAbs, stopId, 1, verbose );
     }
     
     return foundStopId;
 }

bool GenHFHadronMatcher::fixExtraSameFlavours	(	const unsigned int	hadId,
		const std::vector< int > &	hadIndices,
		const std::vector< reco::GenParticle > &	hadMothers,
		const std::vector< std::vector< int > > &	hadMothersIndices,
		const std::vector< int > &	isFromTopWeakDecay,
		const std::vector< std::vector< int > > &	LastQuarkIds,
		const std::vector< std::vector< int > > &	LastQuarkMotherIds,
		std::vector< int > &	lastQuarkIndices,
		std::vector< int > &	hadronFlavour,
		std::set< int > &	checkedHadronIds,
		const int	lastQuarkIndex
	)

private

Finds hadrons that have the same flavour and origin and resolve this ambiguity fixExtraSameFlavours

Parameters

hadId	Index of the hadron being checked
hadIndex	Vector of indices of each hadron pointing to the hadMothers
hadMothers	Vector of gen particles (contain hadrons and all its ancestors)
hadMothersIndices	Vector of indices for each particle from hadMothers
isFromTopWeakDecay	Vector of values showing whether particle comes from the top weak decay
LastQuarkIds	Vector of indices of last quarks for each hadron
LastQuarkMotherIds	Vector of indices of mothers for each last quark from LastQuarkIds
lastQuakIndices	Vector of indices pointing to particular index from the LastQuarkIds and LastQuarkMotherIds to be used for each hadron
lastQuarkIndex	Index from the LastQuarkIds and LastQuarkMotherIds for this particular hadron with index hadId

Returns: Whether other mother with unique association has been found for the hadrons

Definition at line 936 of file GenHFHadronMatcher.cc.

References funct::abs(), and isNeutralPdg().

Referenced by findHadronJets().

 {
     if(checkedHadronIds.count(hadId) != 0) return false;      // Hadron already checked previously and should be skipped
     checkedHadronIds.insert(hadId);                           // Putting hadron to the list of checked ones in this run
 
     if(lastQuarkIndex<0) return false;
     if((int)LastQuarkIds.at(hadId).size()<lastQuarkIndex+1) return false;
     int LastQuarkId = LastQuarkIds.at(hadId).at(lastQuarkIndex);
     int LastQuarkMotherId = LastQuarkMotherIds.at( hadId ).at( lastQuarkIndex );
     int qmFlav = hadMothers.at(LastQuarkId).pdgId() < 0 ? -1 : 1;
     int hadFlavour = qmFlav*std::abs( hadMothers.at( LastQuarkMotherId ).pdgId() );
     bool ambiguityResolved = true;
     // If last quark has inconsistent flavour with its mother, setting the hadron flavour to gluon
     if( (hadMothers.at(LastQuarkId).pdgId()*hadMothers.at(LastQuarkMotherId).pdgId() < 0 && !isNeutralPdg(hadMothers.at(LastQuarkMotherId).pdgId())) || 
         // If particle not coming from the Top weak decay has Top flavour
         (std::abs(hadronFlavour.at(hadId))==6 && isFromTopWeakDecay.at(hadId)==0) ) {
         if((int)LastQuarkIds.at(hadId).size()>lastQuarkIndex+1) fixExtraSameFlavours(hadId, hadIndices, hadMothers, hadMothersIndices, isFromTopWeakDecay, LastQuarkIds, LastQuarkMotherIds, lastQuarkIndices, hadronFlavour, checkedHadronIds, lastQuarkIndex+1); 
         else hadronFlavour.at(hadId) = qmFlav*21;
         return true;
     }
 
     int nSameFlavourHadrons = 0;
     // Looping over all previous hadrons
     for(unsigned int iHad = 0; iHad<hadronFlavour.size(); iHad++) {
         if(iHad==hadId) continue;
         int theLastQuarkIndex = lastQuarkIndices.at(iHad);
         if(theLastQuarkIndex<0) continue;
         if((int)LastQuarkMotherIds.at( iHad ).size() <= theLastQuarkIndex) continue;
         int theLastQuarkMotherId = LastQuarkMotherIds.at( iHad ).at( theLastQuarkIndex );
         int theHadFlavour = hadronFlavour.at(iHad);
         // Skipping hadrons with different flavour
         if(theHadFlavour==0 || std::abs(theHadFlavour)==21) continue;
         if(theHadFlavour != hadFlavour || theLastQuarkMotherId != LastQuarkMotherId) continue;
         ambiguityResolved = false;
         nSameFlavourHadrons++;
         
         // Checking other b-quark mother candidates of this hadron
         if((int)LastQuarkIds.at(hadId).size() > lastQuarkIndex+1) {
             if(fixExtraSameFlavours(hadId, hadIndices, hadMothers, hadMothersIndices, isFromTopWeakDecay, LastQuarkIds, LastQuarkMotherIds, lastQuarkIndices, hadronFlavour, checkedHadronIds, lastQuarkIndex+1) ) {
                 ambiguityResolved = true;
                 break;
             }
         } else
         // Checking other b-quark mother candidates of the particular previous hadron
         if((int)LastQuarkIds.at(iHad).size() > theLastQuarkIndex+1) {
             if(fixExtraSameFlavours(iHad, hadIndices, hadMothers, hadMothersIndices, isFromTopWeakDecay, LastQuarkIds, LastQuarkMotherIds, lastQuarkIndices, hadronFlavour, checkedHadronIds, theLastQuarkIndex+1) ) {
                 ambiguityResolved = true;
                 break;
             };
         } 
 
     }       // End of loop over all previous hadrons
 
     checkedHadronIds.erase(hadId);      // Removing the hadron from the list of checked hadrons
     if(nSameFlavourHadrons>0 && !ambiguityResolved) {
         hadronFlavour.at(hadId) = qmFlav*21;
         return true;
     }
     lastQuarkIndices.at(hadId) = lastQuarkIndex;
     hadronFlavour.at(hadId) = hadFlavour;
     return true;
 }

int GenHFHadronMatcher::flavourSign ( const int pdgId )

private

Sign of the flavour (matter/antimatter)

Parameters

[in] pdgId pdgId to be checked

Returns: +1/-1/0 matter/antimatter/undefined

Definition at line 591 of file GenHFHadronMatcher.cc.

References funct::abs(), and isMesonPdgId().

Referenced by findHadronJets().

 {
     int flavourSign = pdgId / std::abs(pdgId);
     // B mesons have opposite sign
     if( isMesonPdgId(5, pdgId) ) flavourSign *= -1;
     // Returning 0 for bb/cc resonances
     if(pdgId % 1000 / 10 / 11 > 0) flavourSign = 0;
     
     return flavourSign;
 }

std::string GenHFHadronMatcher::getParticleName ( int id ) const

private

bool GenHFHadronMatcher::hasHadronDaughter	(	const int	flavour,
		const reco::Candidate *	thisParticle
	)

private

Check if the particle has bHadron among daughters.

Parameters

[in]	flavour	flavour of a hadron that is being searched (5-B, 4-C)
[in]	thisParticle	a particle that is to be analysed

Returns: whether the particle has a hadron among its daughters

Definition at line 611 of file GenHFHadronMatcher.cc.

References reco::Candidate::daughter(), isHadron(), relval_2017::k, and reco::Candidate::numberOfDaughters().

Referenced by findHadronJets().

 {
     // Looping through daughters of the particle
     bool hasDaughter = false;
     for ( int k=0; k< (int)thisParticle->numberOfDaughters(); k++ ) {
         if ( !isHadron( flavour, thisParticle->daughter(k) ) ) {
             continue;
         }
         hasDaughter = true;
         break;
     }
     
     return hasDaughter;
 }

int GenHFHadronMatcher::idInList	(	std::vector< const reco::Candidate * >	particleList,
		const reco::Candidate *	particle
	)

private

Check if the cpecified particle is already in the list of particles.

Parameters

[in]	particleList	list of particles to be checked
[in]	particle	particle that should be checked

Returns: the index of the particle in the list [-1 if particle not found]

Definition at line 493 of file GenHFHadronMatcher.cc.

References spr::find(), and position.

Referenced by analyzeMothers().

 {
     const unsigned int position = std::find(particleList.begin(), particleList.end(), particle) - particleList.begin();
     if( position >= particleList.size() ) return -1;
     
     return position;
 }

int GenHFHadronMatcher::idInList	(	std::vector< int >	list,
		const int	value
	)

private

Definition at line 501 of file GenHFHadronMatcher.cc.

References spr::find(), position, and relativeConstraints::value.

 {
     const unsigned int position = std::find(list.begin(), list.end(), value) - list.begin();
     if( position >= list.size() ) return -1;
     
     return position;
 }

bool GenHFHadronMatcher::isBaryonPdgId	(	const int	flavour,
		const int	pdgId
	)

private

Check the pdgId if it represents a baryon of particular flavour.

Parameters

[in]	flavour	flavour of a hadron that is being searched (5-B, 4-C)
[in]	pdgId	pdgId to be checked

Returns: true if the pdgId represents a baryon of specified flavour

Definition at line 572 of file GenHFHadronMatcher.cc.

References funct::abs().

Referenced by isHadronPdgId().

 {
     const int flavour_abs = std::abs(flavour);
     if(flavour_abs != 5 && flavour_abs != 4) return false;
     const int pdgId_abs = std::abs(pdgId);
 
     if ( pdgId_abs/1000 != flavour_abs) return false;
     
     return true;
 }

bool GenHFHadronMatcher::isHadron	(	const int	flavour,
		const reco::Candidate *	thisParticle
	)

private

Check the pdgId of a given particle if it is a hadron.

Parameters

[in]	flavour	flavour of a hadron that is being searched (5-B, 4-C)
[in]	thisParticle	a particle that is to be analysed

Returns: whether the particle is a hadron of specified flavour

Definition at line 518 of file GenHFHadronMatcher.cc.

References isHadronPdgId(), and reco::Candidate::pdgId().

Referenced by findHadronJets(), and hasHadronDaughter().

 {
     return isHadronPdgId(flavour, thisParticle->pdgId());
 }

bool GenHFHadronMatcher::isHadronPdgId	(	const int	flavour,
		const int	pdgId
	)

private

Check the pdgId if it represents a hadron of particular flavour.

Parameters

[in]	flavour	flavour of a hadron that is being searched (5-B, 4-C)
[in]	pdgId	pdgId to be checked

Returns: true if the pdgId represents a hadron of specified flavour

Definition at line 532 of file GenHFHadronMatcher.cc.

References isBaryonPdgId(), and isMesonPdgId().

Referenced by findInMothers(), and isHadron().

 {
     if( isBaryonPdgId(flavour, pdgId) || isMesonPdgId(flavour, pdgId) ) return true;
     
     return false;
 }

bool GenHFHadronMatcher::isMesonPdgId	(	const int	flavour,
		const int	pdgId
	)

private

Check the pdgId if it represents a meson of particular flavour.

Parameters

[in]	flavour	flavour of a hadron that is being searched (5-B, 4-C)
[in]	pdgId	pdgId to be checked

Returns: true if the pdgId represents a meson of specified flavour

Definition at line 548 of file GenHFHadronMatcher.cc.

References funct::abs(), and noBBbarResonances_.

Referenced by flavourSign(), and isHadronPdgId().

 {
     const int flavour_abs = std::abs(flavour);
     if(flavour_abs != 5 && flavour_abs != 4) return false;
     const int pdgId_abs = std::abs(pdgId);
 
     if( pdgId_abs/100%10 != flavour_abs) return false;
     // Excluding baryons
     if ( pdgId_abs/1000 == flavour_abs) return false;
     // Excluding bb/cc resonances if required
     if ( noBBbarResonances_ && pdgId_abs/10%100 == 11*flavour_abs ) return false;
     
     return true;
 }

bool GenHFHadronMatcher::isNeutralPdg ( int pdgId )

private

Check whether a given pdgId represents neutral particle.

Parameters

[in]	pdgId
[in]	thisParticle	- a particle that is to be analysed

Returns: if the particle has a hadron among its daughters

Definition at line 912 of file GenHFHadronMatcher.cc.

References funct::abs(), and spr::find().

Referenced by fixExtraSameFlavours().

 {
     const int neutralPdgs_array[] = {9, 21, 22, 23, 25};
     const std::vector<int> neutralPdgs( neutralPdgs_array, neutralPdgs_array + sizeof(neutralPdgs_array) / sizeof(int) );
     if( std::find( neutralPdgs.begin(), neutralPdgs.end(), std::abs(pdgId) ) == neutralPdgs.end() ) return false;
     
     return true;
 }

void GenHFHadronMatcher::produce	(	edm::Event &	evt,
		const edm::EventSetup &	setup
	)

privatevirtual

Implements edm::EDProducer.

Definition at line 197 of file GenHFHadronMatcher.cc.

References findHadronJets(), flavourStr_, genParticleCandidates2GenParticles_cfi::genParticles, genParticlesToken_, edm::Event::getByToken(), edm::EventSetup::getData(), jetFlavourInfosToken_, pdt_, and edm::Event::put().

 {
     setup.getData ( pdt_ );
 
     using namespace edm;
 
     edm::Handle<reco::GenParticleCollection> genParticles;
     evt.getByToken(genParticlesToken_, genParticles);
     
     edm::Handle<reco::JetFlavourInfoMatchingCollection> jetFlavourInfos;
     evt.getByToken(jetFlavourInfosToken_, jetFlavourInfos);
     
     // Defining adron matching variables
     std::auto_ptr<std::vector<reco::GenParticle> > hadMothers ( new std::vector<reco::GenParticle> );
     std::auto_ptr<std::vector<std::vector<int> > > hadMothersIndices ( new std::vector<std::vector<int> > );
     std::auto_ptr<std::vector<int> > hadIndex ( new std::vector<int> );
     std::auto_ptr<std::vector<int> > hadFlavour ( new std::vector<int> );
     std::auto_ptr<std::vector<int> > hadJetIndex ( new std::vector<int> );
     std::auto_ptr<std::vector<int> > hadLeptonIndex ( new std::vector<int> );
     std::auto_ptr<std::vector<int> > hadLeptonHadIndex ( new std::vector<int> );
     std::auto_ptr<std::vector<int> > hadLeptonViaTau( new std::vector<int> );
     std::auto_ptr<std::vector<int> > hadFromTopWeakDecay ( new std::vector<int> );
     std::auto_ptr<std::vector<int> > hadBHadronId ( new std::vector<int> );
     
     *hadJetIndex = findHadronJets (genParticles.product(), jetFlavourInfos.product(), *hadIndex, *hadMothers, *hadMothersIndices, *hadLeptonIndex, *hadLeptonHadIndex, *hadLeptonViaTau, *hadFlavour, *hadFromTopWeakDecay, *hadBHadronId );
 
     // Putting products to the event
     evt.put ( hadMothers,         "gen"+flavourStr_+"HadPlusMothers" );
     evt.put ( hadMothersIndices,  "gen"+flavourStr_+"HadPlusMothersIndices" );
     evt.put ( hadIndex,           "gen"+flavourStr_+"HadIndex" );
     evt.put ( hadFlavour,         "gen"+flavourStr_+"HadFlavour" );
     evt.put ( hadJetIndex,        "gen"+flavourStr_+"HadJetIndex" );
     evt.put ( hadLeptonIndex,     "gen"+flavourStr_+"HadLeptonIndex" );
     evt.put ( hadLeptonHadIndex,  "gen"+flavourStr_+"HadLeptonHadronIndex" );
     evt.put ( hadLeptonViaTau,    "gen"+flavourStr_+"HadLeptonViaTau" );
     evt.put ( hadFromTopWeakDecay,"gen"+flavourStr_+"HadFromTopWeakDecay" );
     evt.put ( hadBHadronId,       "gen"+flavourStr_+"HadBHadronId" );
 }

bool GenHFHadronMatcher::putMotherIndex	(	std::vector< std::vector< int > > &	hadMothersIndices,
		int	partIndex,
		int	mothIndex
	)

private

puts mother index to the list of mothers of particle, if it isn't there already

Parameters

[in]	hadMothersIndices	vector of indices of mothers for each particle
[in]	partIndex	index of the particle for which the mother index should be stored
[in]	mothIndex	index of mother that should be stored for current particle

Returns: whether the particle index was alreade in the list

Definition at line 738 of file GenHFHadronMatcher.cc.

References relval_2017::k.

Referenced by analyzeMothers().

 {
     // Putting vector of mothers indices for the given particle
     bool inList=false;
     if ( partIndex<0 ) {
         return false;
     }
 
     while ( (int)hadMothersIndices.size() <= partIndex ) { // If there is no list of mothers for current particle yet
         std::vector<int> mothersIndices;
         hadMothersIndices.push_back ( mothersIndices );
     }
 
     std::vector<int> *hadMotherIndices = &hadMothersIndices.at(partIndex);
     // Removing other mothers if particle must have no mothers
     if ( mothIndex == -1 ) {
         hadMotherIndices->clear();
     } else {
         // Checking if current mother is already in the list of theParticle's mothers
         for ( int k = 0; k < (int)hadMotherIndices->size(); k++ ) {
             if ( hadMotherIndices->at(k) != mothIndex && hadMotherIndices->at(k) != -1 ) {
                 continue;
             }
             inList=true;
             break;
         }
     }
     // Adding current mother to the list of mothers of this particle
     if ( !inList ) {
         hadMotherIndices->push_back(mothIndex);
     }
 
     return inList;
 }