#include <ParticleDecayer.h>

Inheritance diagram for ParticleDecayer:

Collaboration diagram for ParticleDecayer:

Public Member Functions
	ParticleDecayer (const std::string &name, ISvcLocator *pSvcLocator)

	~ParticleDecayer ()=default

StatusCode	genInitialize ()
	For initializing the generator, if required. More...

StatusCode	fillEvt (HepMC::GenEvent *)
	For filling the HepMC event object. More...

virtual StatusCode	sysInitialize () override
	Override sysInitialize. More...

virtual const DataObjIDColl &	extraOutputDeps () const override
	Return the list of extra output dependencies. More...

ServiceHandle< StoreGateSvc > &	evtStore ()
	The standard `StoreGateSvc` (event store) Returns (kind of) a pointer to the `StoreGateSvc`. More...

const ServiceHandle< StoreGateSvc > &	evtStore () const
	The standard `StoreGateSvc` (event store) Returns (kind of) a pointer to the `StoreGateSvc`. More...

const ServiceHandle< StoreGateSvc > &	detStore () const
	The standard `StoreGateSvc/DetectorStore` Returns (kind of) a pointer to the `StoreGateSvc`. More...

virtual StatusCode	sysStart () override
	Handle START transition. More...

virtual std::vector< Gaudi::DataHandle * >	inputHandles () const override
	Return this algorithm's input handles. More...

virtual std::vector< Gaudi::DataHandle * >	outputHandles () const override
	Return this algorithm's output handles. More...

Gaudi::Details::PropertyBase &	declareProperty (Gaudi::Property< T > &t)

Gaudi::Details::PropertyBase *	declareProperty (const std::string &name, SG::VarHandleKey &hndl, const std::string &doc, const SG::VarHandleKeyType &)
	Declare a new Gaudi property. More...

Gaudi::Details::PropertyBase *	declareProperty (const std::string &name, SG::VarHandleBase &hndl, const std::string &doc, const SG::VarHandleType &)
	Declare a new Gaudi property. More...

Gaudi::Details::PropertyBase *	declareProperty (const std::string &name, SG::VarHandleKeyArray &hndArr, const std::string &doc, const SG::VarHandleKeyArrayType &)

Gaudi::Details::PropertyBase *	declareProperty (const std::string &name, T &property, const std::string &doc, const SG::NotHandleType &)
	Declare a new Gaudi property. More...

Gaudi::Details::PropertyBase *	declareProperty (const std::string &name, T &property, const std::string &doc="none")
	Declare a new Gaudi property. More...

void	updateVHKA (Gaudi::Details::PropertyBase &)

MsgStream &	msg () const

MsgStream &	msg (const MSG::Level lvl) const

bool	msgLvl (const MSG::Level lvl) const

Protected Member Functions
void	renounceArray (SG::VarHandleKeyArray &handlesArray)
	remove all handles from I/O resolution More...

std::enable_if_t< std::is_void_v< std::result_of_t< decltype(&T::renounce)(T)> > &&!std::is_base_of_v< SG::VarHandleKeyArray, T > &&std::is_base_of_v< Gaudi::DataHandle, T >, void >	renounce (T &h)

void	extraDeps_update_handler (Gaudi::Details::PropertyBase &ExtraDeps)
	Add StoreName to extra input/output deps as needed. More...

Private Types
typedef ServiceHandle< StoreGateSvc >	StoreGateSvc_t

Private Member Functions
double	getParticleMass (int pdgID)

void	addParticle (HepMC::GenVertexPtr, int pdg, HepMC::FourVector, int statusCode)

double	rnd_ExpLifetime (CLHEP::HepRandomEngine *engine, double ct)

double	rnd_DoubleRange (CLHEP::HepRandomEngine *engine, double a, double b)

double	cosgen (CLHEP::HepRandomEngine *engine, int itype)

StatusCode	DFTwoBodyDecay (CLHEP::HepRandomEngine *engine, HepMC::GenParticlePtr, int)

StatusCode	setDecayPosition (CLHEP::HepRandomEngine engine, HepMC::GenParticlePtr, HepMC::GenEvent , bool doScalarDecay=false)

StatusCode	changeMass (HepMC::GenParticlePtr, double)

StatusCode	getDecayProducts (CLHEP::HepRandomEngine *engine, CLHEP::HepLorentzVector, double, std::vector< CLHEP::HepLorentzVector > &, int decayType=0)

Gaudi::Details::PropertyBase &	declareGaudiProperty (Gaudi::Property< T > &hndl, const SG::VarHandleKeyType &)
	specialization for handling Gaudi::Property<SG::VarHandleKey> More...

Gaudi::Details::PropertyBase &	declareGaudiProperty (Gaudi::Property< T > &hndl, const SG::VarHandleKeyArrayType &)
	specialization for handling Gaudi::Property<SG::VarHandleKeyArray> More...

Gaudi::Details::PropertyBase &	declareGaudiProperty (Gaudi::Property< T > &hndl, const SG::VarHandleType &)
	specialization for handling Gaudi::Property<SG::VarHandleBase> More...

Gaudi::Details::PropertyBase &	declareGaudiProperty (Gaudi::Property< T > &t, const SG::NotHandleType &)
	specialization for handling everything that's not a Gaudi::Property<SG::VarHandleKey> or a <SG::VarHandleKeyArray> More...

Private Attributes
std::string	m_truthParticleContainerName

int	m_LJType {}

int	m_scalarPDGID {}

double	m_scalarMass {}

double	m_particleMass {}

int	m_particleID {}

double	m_particleLifeTime {}

int	m_particlePDGID {}

int	m_particlePolarization {}

bool	m_oppositePolarization {}

double	m_BRElectron {}

double	m_BRMuon {}

double	m_BRPion {}

bool	m_doUniformDecay {}

bool	m_doExponentialDecay {}

bool	m_expDecayDoVariableLifetime {}

double	m_expDecayFractionToKeep {}

bool	m_expDecayDoTruncateLongDecays {}

double	m_barrelRadius

double	m_endCapDistance

double	m_thetaEndCapBarrel

HepPDT::ParticleDataTable *	m_particleTable {}

CLHEP::HepLorentzVector	m_boostLV

CLHEP::HepLorentzVector	m_posLV

CLHEP::HepLorentzVector	m_posLV1

CLHEP::HepLorentzVector	m_posLV2

int	m_eventCounter

DataObjIDColl	m_extendedExtraObjects

StoreGateSvc_t	m_evtStore
	Pointer to StoreGate (event store by default) More...

StoreGateSvc_t	m_detStore
	Pointer to StoreGate (detector store by default) More...

std::vector< SG::VarHandleKeyArray * >	m_vhka

bool	m_varHandleArraysDeclared

Utility event-mangling functions
Todo: Replace with HepMC units when available
ServiceHandle< IPartPropSvc >	m_ppSvc {this, "PartPropSvc", "PartPropSvc"}
	Handle on the particle property service. More...

SG::ReadHandleKey< McEventCollection >	m_mcevents_const { this, "McEventKey", "GEN_EVENT", "StoreGate key of the MC event collection" }
	Const handle to the MC event collection. More...

void	GeVToMeV (HepMC::GenEvent *evt)
	Scale event energies/momenta by x 1000. More...

void	MeVToGeV (HepMC::GenEvent *evt)
	Scale event energies/momenta by x 1/1000. More...

void	cmTomm (HepMC::GenEvent *evt)
	Scale event lengths by x 10. More...

void	mmTocm (HepMC::GenEvent *evt)
	Scale event lengths by x 1/10. More...

Gen-specific event loop methods: to be overloaded
virtual StatusCode	genuserInitialize ()
	For initialization of user code, if required. Called after genInitialize. More...

virtual StatusCode	callGenerator ()
	For calling the generator on each iteration of the event loop. More...

virtual StatusCode	genFinalize ()
	For finalising the generator, if required. More...

Features for derived classes to use internally
ServiceHandle< IAthRNGSvc >	m_rndmSvc {this, "RndmSvc", "AthRNGSvc"}
	Data members. More...

ServiceHandle< IIncidentSvc >	m_incidentSvc {this, "IncidentSvc", "IncidentSvc"}
	Handle on the incident service. More...

IntegerProperty	m_randomSeed {this, "RandomSeed", 1234567, "Random seed for the built-in random engine"}
	Seed for random number engine. More...

BooleanProperty	m_isAfterburner {this, "IsAfterburner", false, "Set true if generator modifies existing events rather than creating new ones"}
	Flag for normal vs. afterburner generators. More...

CLHEP::HepRandomEngine *	getRandomEngine (const std::string &streamName, const EventContext &ctx) const

CLHEP::HepRandomEngine *	getRandomEngine (const std::string &streamName, unsigned long int randomSeedOffset, const EventContext &ctx) const

CLHEP::HepRandomEngine *	getRandomEngineDuringInitialize (const std::string &streamName, unsigned long int randomSeedOffset, unsigned int conditionsRun=1, unsigned int lbn=1) const

Detailed Description

Definition at line 26 of file ParticleDecayer.h.

Member Typedef Documentation

◆ StoreGateSvc_t

typedef ServiceHandle<StoreGateSvc> AthCommonDataStore< AthCommonMsg< Algorithm > >::StoreGateSvc_t

privateinherited

Definition at line 388 of file AthCommonDataStore.h.

Constructor & Destructor Documentation

◆ ParticleDecayer()

ParticleDecayer::ParticleDecayer	(	const std::string &	name,
		ISvcLocator *	pSvcLocator
	)

Definition at line 223 of file ParticleDecayer.cxx.

                                                                                 : 
    GenModule(name, pSvcLocator),
    m_truthParticleContainerName("GEN_EVENT"),
    m_eventCounter(0)
 {
   declareProperty("McEventCollection",     m_truthParticleContainerName);  
   declareProperty("LJType",                m_LJType = 1); //1 = one dark photon per LeptonJet, 2 = two dark photons per LeptonJet
   declareProperty("ScalarPDGID",           m_scalarPDGID); //new PDG ID of the scalar 
   declareProperty("ScalarMass",            m_scalarMass); //new mass of the scalar in MeV
   declareProperty("ParticleID",            m_particleID = 999); //PDG ID of the geantino
   declareProperty("ParticleMass",          m_particleMass = 400); //new mass of the dark photon in MeV (default 400 MeV)
   declareProperty("ParticleLifeTime",      m_particleLifeTime = 0); //ctau of the dark photon in mm (default prompt)
   declareProperty("ParticlePolarization",  m_particlePolarization = 0); //polarization of the dark photon (default 0 : isotropic decay, -1 : transverse, 1 : longitudinal)
   declareProperty("OppositePolarization",  m_oppositePolarization = false);//In case of LJType == 2 and opposite polarization for the two dark photons in the event
   declareProperty("ParticlePDGID",         m_particlePDGID = 700022); //new PDG ID of the dark photon (default 700022)
   declareProperty("DecayBRElectrons",      m_BRElectron = 1.); //BR of dark photon decay to electrons  
   declareProperty("DecayBRMuons",          m_BRMuon = 0.); //BR of dark photon decay to muons 
   declareProperty("DecayBRPions",          m_BRPion = 0.); //BR of dark photon decay to pions 
  
   //Choose between the different types of displaced decays
   declareProperty("DoUniformDecay",               m_doUniformDecay = false);
   declareProperty("DoExponentialDecay",           m_doExponentialDecay = true );
   declareProperty("ExpDecayDoVariableLifetime",   m_expDecayDoVariableLifetime   = false );
   declareProperty("ExpDecayPercentageToKeep",     m_expDecayFractionToKeep       = 0.8   );
   declareProperty("ExpDecayDoTruncateLongDecays", m_expDecayDoTruncateLongDecays = false );
  
   //Dimensions within which to decay in case of non-prompt events
   declareProperty("BarrelRadius",                 m_barrelRadius         = 10.e3 );      // outer limit for decay radius
   declareProperty("EndCapDistance",               m_endCapDistance       = 15.e3 );      // outer limit along z for decays in endcap
   declareProperty("ThetaEndCapBarrel",            m_thetaEndCapBarrel    = 0.439067982); // theta if where to switch between barrel and endcap (default: eta = 1.5)
 }

◆ ~ParticleDecayer()

ParticleDecayer::~ParticleDecayer ( )

default

Member Function Documentation

◆ addParticle()

void ParticleDecayer::addParticle	(	HepMC::GenVertexPtr	prod_vtx,
		int	pdg,
		HepMC::FourVector	momentum,
		int	statusCode
	)

private

Definition at line 440 of file ParticleDecayer.cxx.

                                                                                                                {
  
   double mass = 0.;
   if( pdg == m_particlePDGID)
      {
         mass = m_particleMass;
      }else
      {
         mass = getParticleMass(pdg);
      }
   double energy=std::sqrt(std::pow(momentum.x(),2)+std::pow(momentum.y(),2)+std::pow(momentum.z(),2)+mass*mass);   
 HepMC::GenParticlePtr aParticle = HepMC::newGenParticlePtr (HepMC::FourVector(momentum.x(), momentum.y(), momentum.z(), energy), 
                                    pdg, statusCode);
  
   prod_vtx->add_particle_out(aParticle);
 }

◆ ATLAS_NOT_CONST_THREAD_SAFE() [1/2]

HepMC::GenEvent* event GenBase::ATLAS_NOT_CONST_THREAD_SAFE ( )

inlineinherited

Access the current signal event (first in the McEventCollection)

Note: This function will make a new McEventCollection if there is not already a valid one and MakeMcEvent=True.

Definition at line 76 of file GenBase.h.

                                                       {
     if (events()->empty())
       ATH_MSG_ERROR("McEventCollection is empty during first event access");
     return *(events()->begin());
   }

◆ ATLAS_NOT_CONST_THREAD_SAFE() [2/2]

McEventCollection* events GenBase::ATLAS_NOT_CONST_THREAD_SAFE ( )

inherited

Access the current event's McEventCollection.

Note: This function will make a new McEventCollection if there is not already a valid one and MakeMcEvent=True.

◆ callGenerator()

virtual StatusCode GenModule::callGenerator ( )

inlinevirtualinherited

For calling the generator on each iteration of the event loop.

Reimplemented in Hijing, Herwig7, CosmicGenerator, Pythia8_i, Hydjet, BeamHaloGeneratorAlg, Starlight_i, Epos, MultiParticleGunPileup, MultiPy8Pileup, TrackRecordGenerator, Pythia8B_i, and Sherpa_i.

Definition at line 66 of file GenModule.h.

66 { return StatusCode::SUCCESS; }

◆ changeMass()

StatusCode ParticleDecayer::changeMass	(	HepMC::GenParticlePtr	genpart,
		double	newMass
	)

private

Definition at line 94 of file ParticleDecayer.cxx.

 {
    double e     = genpart->momentum().e(); 
    double theta = genpart->momentum().theta(); 
    double phi   = genpart->momentum().phi(); 
    //Sanity check 
    double p2 = e*e - newMass*newMass;
    if ( p2 < 0 ) {
       ATH_MSG_FATAL("ParticleDecayer::fillEvt:   -- you have generated a tachyon!");
       return StatusCode::FAILURE;
    }
    //At this point, we have e, theta, and phi.  Put them together to get the four-momentum.
    double p  = std::sqrt(p2);
    double px = p*std::sin(theta)*std::cos(phi);
    double py = p*std::sin(theta)*std::sin(phi);
    double pz = p*std::cos(theta);
    //Fill the four-momentum
    const CLHEP::HepLorentzVector updatedLV(px,py,pz,e);
    genpart->set_momentum(HepMC::FourVector(updatedLV.x(),updatedLV.y(),updatedLV.z(),updatedLV.e()));
    genpart->set_generated_mass(newMass);
    return StatusCode::SUCCESS;
 }

◆ cmTomm()

void GenBase::cmTomm ( HepMC::GenEvent * evt )

protectedinherited

Scale event lengths by x 10.

Definition at line 81 of file GenBase.cxx.

                                        {
   for (HepMC::GenEvent::vertex_iterator vtx = evt->vertices_begin(); vtx != evt->vertices_end(); ++vtx) {
     const HepMC::FourVector fv((*vtx)->position().x() * 10,
                                (*vtx)->position().y() * 10,
                                (*vtx)->position().z() * 10,
                                (*vtx)->position().t() * 10);
     (*vtx)->set_position(fv);
   }
 }

◆ cosgen()

double ParticleDecayer::cosgen	(	CLHEP::HepRandomEngine *	engine,
		int	itype
	)

private

Definition at line 47 of file ParticleDecayer.cxx.

                                                                      {
   double x,fx,hit;
   x=0;  
  
   if(itype==0){  // flat
     x=rnd_DoubleRange(engine,-1.,1.);
     return x;
   }
     
   if(itype==1){  // f(cost)=1.5*cost^2
     hit=1.5;
     fx=0;
      while(hit>fx){
        x=rnd_DoubleRange(engine,-1.,1.);
        hit=rnd_DoubleRange(engine,0.,1.5);
        fx=1.5*x*x;
      }
     return x;
   }
  
   if(itype==2){    // f(cost)=0.375(1+cost^2)
     hit=0.75;
     fx=0;
     while(hit>fx){
       x=rnd_DoubleRange(engine,-1.,1.);
       hit=rnd_DoubleRange(engine,0.,0.75);
       fx=0.375*(1+x*x);
     }
     return x;
   }
  
   if(itype==3){      // f(cost)=0.75(1-cost^2)
     hit=1.5;
     fx=0;
     while(hit>fx){
       x=rnd_DoubleRange(engine,-1.,1.);
       hit=rnd_DoubleRange(engine,0.,1.5);
       fx=0.75*(1-x*x);
     }
     return x;
   }
  
   return x;
  
 }

◆ declareGaudiProperty() [1/4]

Gaudi::Details::PropertyBase& AthCommonDataStore< AthCommonMsg< Algorithm > >::declareGaudiProperty	(	Gaudi::Property< T > &	hndl,
		const SG::VarHandleKeyArrayType &
	)

inlineprivateinherited

specialization for handling Gaudi::Property<SG::VarHandleKeyArray>

Definition at line 170 of file AthCommonDataStore.h.

   {
     return *AthCommonDataStore<PBASE>::declareProperty(hndl.name(),
                                                        hndl.value(), 
                                                        hndl.documentation());
  
   }

◆ declareGaudiProperty() [2/4]

Gaudi::Details::PropertyBase& AthCommonDataStore< AthCommonMsg< Algorithm > >::declareGaudiProperty	(	Gaudi::Property< T > &	hndl,
		const SG::VarHandleKeyType &
	)

inlineprivateinherited

specialization for handling Gaudi::Property<SG::VarHandleKey>

Definition at line 156 of file AthCommonDataStore.h.

   {
     return *AthCommonDataStore<PBASE>::declareProperty(hndl.name(),
                                                        hndl.value(), 
                                                        hndl.documentation());
  
   }

◆ declareGaudiProperty() [3/4]

Gaudi::Details::PropertyBase& AthCommonDataStore< AthCommonMsg< Algorithm > >::declareGaudiProperty	(	Gaudi::Property< T > &	hndl,
		const SG::VarHandleType &
	)

inlineprivateinherited

specialization for handling Gaudi::Property<SG::VarHandleBase>

Definition at line 184 of file AthCommonDataStore.h.

   {
     return *AthCommonDataStore<PBASE>::declareProperty(hndl.name(),
                                                        hndl.value(), 
                                                        hndl.documentation());
   }

◆ declareGaudiProperty() [4/4]

Gaudi::Details::PropertyBase& AthCommonDataStore< AthCommonMsg< Algorithm > >::declareGaudiProperty	(	Gaudi::Property< T > &	t,
		const SG::NotHandleType &
	)

inlineprivateinherited

specialization for handling everything that's not a Gaudi::Property<SG::VarHandleKey> or a <SG::VarHandleKeyArray>

Definition at line 199 of file AthCommonDataStore.h.

   {
     return PBASE::declareProperty(t);
   }

◆ declareProperty() [1/6]

Gaudi::Details::PropertyBase* AthCommonDataStore< AthCommonMsg< Algorithm > >::declareProperty	(	const std::string &	name,
		SG::VarHandleBase &	hndl,
		const std::string &	doc,
		const SG::VarHandleType &
	)

inlineinherited

Declare a new Gaudi property.

Parameters

name	Name of the property.
hndl	Object holding the property value.
doc	Documentation string for the property.

This is the version for types that derive from SG::VarHandleBase. The property value object is put on the input and output lists as appropriate; then we forward to the base class.

Definition at line 245 of file AthCommonDataStore.h.

   {
     this->declare(hndl.vhKey());
     hndl.vhKey().setOwner(this);
  
     return PBASE::declareProperty(name,hndl,doc);
   }

◆ declareProperty() [2/6]

Gaudi::Details::PropertyBase* AthCommonDataStore< AthCommonMsg< Algorithm > >::declareProperty	(	const std::string &	name,
		SG::VarHandleKey &	hndl,
		const std::string &	doc,
		const SG::VarHandleKeyType &
	)

inlineinherited

Declare a new Gaudi property.

Parameters

name	Name of the property.
hndl	Object holding the property value.
doc	Documentation string for the property.

This is the version for types that derive from SG::VarHandleKey. The property value object is put on the input and output lists as appropriate; then we forward to the base class.

Definition at line 221 of file AthCommonDataStore.h.

   {
     this->declare(hndl);
     hndl.setOwner(this);
  
     return PBASE::declareProperty(name,hndl,doc);
   }

◆ declareProperty() [3/6]

Gaudi::Details::PropertyBase* AthCommonDataStore< AthCommonMsg< Algorithm > >::declareProperty	(	const std::string &	name,
		SG::VarHandleKeyArray &	hndArr,
		const std::string &	doc,
		const SG::VarHandleKeyArrayType &
	)

inlineinherited

Definition at line 259 of file AthCommonDataStore.h.

   {
  
     // std::ostringstream ost;
     // ost << Algorithm::name() << " VHKA declareProp: " << name 
     //     << " size: " << hndArr.keys().size() 
     //     << " mode: " << hndArr.mode() 
     //     << "  vhka size: " << m_vhka.size()
     //     << "\n";
     // debug() << ost.str() << endmsg;
  
     hndArr.setOwner(this);
     m_vhka.push_back(&hndArr);
  
     Gaudi::Details::PropertyBase* p =  PBASE::declareProperty(name, hndArr, doc);
     if (p != 0) {
       p->declareUpdateHandler(&AthCommonDataStore<PBASE>::updateVHKA, this);
     } else {
       ATH_MSG_ERROR("unable to call declareProperty on VarHandleKeyArray " 
                     << name);
     }
  
     return p;
  
   }

◆ declareProperty() [4/6]

Gaudi::Details::PropertyBase* AthCommonDataStore< AthCommonMsg< Algorithm > >::declareProperty	(	const std::string &	name,
		T &	property,
		const std::string &	doc,
		const SG::NotHandleType &
	)

inlineinherited

Declare a new Gaudi property.

Parameters

name	Name of the property.
property	Object holding the property value.
doc	Documentation string for the property.

This is the generic version, for types that do not derive from SG::VarHandleKey. It just forwards to the base class version of declareProperty.

Definition at line 333 of file AthCommonDataStore.h.

   {
     return PBASE::declareProperty(name, property, doc);
   }

◆ declareProperty() [5/6]

Gaudi::Details::PropertyBase* AthCommonDataStore< AthCommonMsg< Algorithm > >::declareProperty	(	const std::string &	name,
		T &	property,
		const std::string &	doc = `"none"`
	)

inlineinherited

Declare a new Gaudi property.

Parameters

name	Name of the property.
property	Object holding the property value.
doc	Documentation string for the property.

This dispatches to either the generic declareProperty or the one for VarHandle/Key/KeyArray.

Definition at line 352 of file AthCommonDataStore.h.

   {
     typedef typename SG::HandleClassifier<T>::type htype;
     return declareProperty (name, property, doc, htype());
   }

◆ declareProperty() [6/6]

Gaudi::Details::PropertyBase& AthCommonDataStore< AthCommonMsg< Algorithm > >::declareProperty ( Gaudi::Property< T > & t )

inlineinherited

Definition at line 145 of file AthCommonDataStore.h.

                                                                  {
     typedef typename SG::HandleClassifier<T>::type htype;
     return AthCommonDataStore<PBASE>::declareGaudiProperty(t, htype());
   }

◆ detStore()

const ServiceHandle<StoreGateSvc>& AthCommonDataStore< AthCommonMsg< Algorithm > >::detStore ( ) const

inlineinherited

The standard StoreGateSvc/DetectorStore Returns (kind of) a pointer to the StoreGateSvc.

Definition at line 95 of file AthCommonDataStore.h.

95 { return m_detStore; }

◆ DFTwoBodyDecay()

StatusCode ParticleDecayer::DFTwoBodyDecay	(	CLHEP::HepRandomEngine *	engine,
		HepMC::GenParticlePtr	genpart,
		int	Polarization
	)

private

Definition at line 471 of file ParticleDecayer.cxx.

                                                                                                                         {
  
  
    ATH_MSG_DEBUG("ParticleDecayer::fillEvt:   -- allow the two-body decay of the dark photon...");
  
    //create heplorentzvector from genpart's fourMomentum, as it is more useful
    CLHEP::HepLorentzVector boostDF( genpart->momentum().px(), genpart->momentum().py(), genpart->momentum().pz(), genpart->momentum().e() );
  
    //Given branching fractions, pick decay mode
    int ModeOfDecay;
    double unif = rnd_DoubleRange(engine, 0.,1.);
    if (unif<=m_BRElectron) {
       ModeOfDecay = 11;
    } else if (unif<=(m_BRElectron+m_BRMuon) && unif>m_BRElectron) {
       ModeOfDecay = 13;
    } else {
       ModeOfDecay = 211;
    }
    ATH_MSG_DEBUG("ParticleDecayer::fillEvt:   -- decayMode = " << ModeOfDecay);
    
    //Now that we have a decay mode. get the associated particle mass
    double decayPartMass = getParticleMass(ModeOfDecay);
  
    //Choose how to decay
    //angular distribution handling, see pag.6 of http://arxiv.org/pdf/hep-ph/0605296v2.pdf
    int type = 0; //isotropic by default
    if(Polarization==0) {
       type = 0; //isotropic
    } else if(Polarization==-1 && (ModeOfDecay==11 || ModeOfDecay==13)) {
       type = 2; //transverse polarization of the dark photon + fermions
    } else if(Polarization==1 && (ModeOfDecay==11 || ModeOfDecay==13)) {
       type = 3;  //longitudinal polarization of the dark photon + fermions
    } else if(Polarization==-1 && ModeOfDecay==211) {
       type = 3;  //transverse polarization of the dark photon + scalars
    } else if(Polarization==1 && ModeOfDecay==211) {
       type = 1;  //longitudinal polarization of the dark photon + scalars
    } else {
       ATH_MSG_FATAL("ParticleDecayer::fillEvt:   -- wrong polarization value... please check!");
       return StatusCode::FAILURE;
    }
  
    //Now we are ready to decay the dark photon
    std::vector<CLHEP::HepLorentzVector> daughterLVs; 
    CHECK( getDecayProducts( engine, boostDF, decayPartMass, daughterLVs, type) );
    
    //Add the daughters to the pool file
    ATH_MSG_DEBUG("ParticleDecayer::fillEvt:   -- Add the daughters to the pool file");
    auto end_vtx = genpart->end_vertex();
    auto v0=daughterLVs.at(0).vect();
    addParticle(end_vtx,  ModeOfDecay, HepMC::FourVector(v0.x(),v0.y(),v0.z(),0.0),    1);
    auto v1=daughterLVs.at(1).vect();
    addParticle(end_vtx, -ModeOfDecay, HepMC::FourVector(v1.x(),v1.y(),v1.z(),0.0),    1);
  
    return StatusCode::SUCCESS;
 }

◆ event_const()

const HepMC::GenEvent* GenBase::event_const ( ) const

inlineinherited

Access the current signal event (const)

Definition at line 83 of file GenBase.h.

                                            {
     if (events_const()->empty())
       ATH_MSG_ERROR("Const McEventCollection is empty during first event access");
     return *(events_const()->begin());
   }

◆ events_const() [1/2]

const McEventCollection* GenBase::events_const ( ) const

inlineinherited

Access the current event's McEventCollection (const)

Definition at line 96 of file GenBase.h.

                                                 {
     return events_const( getContext() );
   }

◆ events_const() [2/2]

const McEventCollection* GenBase::events_const ( const EventContext & ctx ) const

inlineinherited

Definition at line 99 of file GenBase.h.

                                                                          {
     SG::ReadHandle<McEventCollection> ret = SG::makeHandle(m_mcevents_const, ctx);
     if (!ret.isValid())
       ATH_MSG_ERROR("No McEventCollection found in StoreGate with key " << m_mcevents_const.key());
     return ret.cptr();
   }

◆ evtStore() [1/2]

ServiceHandle<StoreGateSvc>& AthCommonDataStore< AthCommonMsg< Algorithm > >::evtStore ( )

inlineinherited

The standard StoreGateSvc (event store) Returns (kind of) a pointer to the StoreGateSvc.

Definition at line 85 of file AthCommonDataStore.h.

85 { return m_evtStore; }

◆ evtStore() [2/2]

const ServiceHandle<StoreGateSvc>& AthCommonDataStore< AthCommonMsg< Algorithm > >::evtStore ( ) const

inlineinherited

The standard StoreGateSvc (event store) Returns (kind of) a pointer to the StoreGateSvc.

Definition at line 90 of file AthCommonDataStore.h.

90 { return m_evtStore; }

◆ execute()

StatusCode GenModule::execute ( )

virtualinherited

Todo:: Remove hard-coded alg name checking (already incomplete)

Reimplemented from GenBase.

Definition at line 70 of file GenModule.cxx.

                               {
   // Examples of how to retrieve the random number engine for a given
   // stream.
   // NB getRandomEngine should only be called once per event for a
   // given stream, as it causes the stream to be re-seeded each time
   // it is called.
  
   // Example 1 - seeded based on the current event number (+ slot, run, streamName)
   //const EventContext& ctx = Gaudi::Hive::currentContext();
   //CLHEP::HepRandomEngine* rndmEngine = this->getRandomEngine("MyStream", ctx);
  
   // Example 2 - seeded based on the m_randomSeed property (+ slot, run, streamName)
   //const EventContext& ctx = Gaudi::Hive::currentContext();
   //CLHEP::HepRandomEngine* rndmEngine = this->getRandomEngine("MyStream", m_randomSeed.value(), ctx);
  
   // Call the code that generates an event
   CHECK(this->callGenerator());
  
   // Create the MC event and send the GeneratorEvent stored in it to fillEvt
   HepMC::GenEvent* evt = HepMC::newGenEvent(1,1);
   CHECK(this->fillEvt(evt));
   HepMC::fillBarcodesAttribute(evt);
  
   // Add the event to the MC event collection
   if (events()) {
     // If this is an "afterburner" generator, replace the last event rather than add a new one
     if (m_isAfterburner.value() || name() == "Tauola" || name() == "Photos") {
       events()->pop_back();
     }
     // Add the event to the end of the collection
     events()->push_back(evt);
     ATH_MSG_DEBUG("MC event added to McEventCollection");
  
     // remove the empty event in case of ParticleDecayer
     if (name() == "ParticleDecayer") {
       events()->pop_back();
     }
   }
  
   // Call the incident service to notify that an event has been made
   m_incidentSvc->fireIncident( Incident(name(), "McEventGenerated") );
   return StatusCode::SUCCESS;
 }

◆ extraDeps_update_handler()

void AthCommonDataStore< AthCommonMsg< Algorithm > >::extraDeps_update_handler ( Gaudi::Details::PropertyBase & ExtraDeps )

protectedinherited

Add StoreName to extra input/output deps as needed.

use the logic of the VarHandleKey to parse the DataObjID keys supplied via the ExtraInputs and ExtraOuputs Properties to add the StoreName if it's not explicitly given

◆ extraOutputDeps()

const DataObjIDColl & AthAlgorithm::extraOutputDeps ( ) const

overridevirtualinherited

Return the list of extra output dependencies.

This list is extended to include symlinks implied by inheritance relations.

Definition at line 50 of file AthAlgorithm.cxx.

 {
   // If we didn't find any symlinks to add, just return the collection
   // from the base class.  Otherwise, return the extended collection.
   if (!m_extendedExtraObjects.empty()) {
     return m_extendedExtraObjects;
   }
   return Algorithm::extraOutputDeps();
 }

◆ fillEvt()

StatusCode ParticleDecayer::fillEvt ( HepMC::GenEvent * evt )

virtual

For filling the HepMC event object.

‍*** Now allow the two-body decay of the particle

‍*** Now allow the two-body decay of the scalar

Implements GenModule.

Definition at line 290 of file ParticleDecayer.cxx.

                                                         {
  
   ATH_MSG_DEBUG("ParticleDecayer::fillEvt: -- EventCounter: " << m_eventCounter);
  
   const EventContext& ctx = Gaudi::Hive::currentContext();
   CLHEP::HepRandomEngine* engine = this->getRandomEngine("ParticleDecayer", ctx);
  
   StatusCode status = StatusCode::SUCCESS;
  
   // Extract the event from the TES
   McEventCollection* mcEvtColl = nullptr;
   if (evtStore()->contains<McEventCollection>(m_truthParticleContainerName) && evtStore()->retrieve(mcEvtColl, m_truthParticleContainerName).isSuccess() ) {
     ATH_MSG_DEBUG("ParticleDecayer::fillEvt: -- Found an McEventCollection for ParticleDecayer");
   } else {
     ATH_MSG_FATAL("TES is empty!!!!");
     status = StatusCode::FAILURE;  
     return status;  
   }
  
   event = mcEvtColl->back();
  
   if (event == NULL) {
     ATH_MSG_FATAL("ParticleDecayer::fillEvt: -- McEvent was not successfully created");
     status = StatusCode::FAILURE;  
     return status;  
   }
   
   for ( auto  genpart : *event) { 
  
      //    only one dark photon per LeptonJet    //
      if (m_LJType == 1) {
         if (genpart->pdg_id()==m_particleID) { //if geantino assign the new mass and cross-check
            ATH_MSG_DEBUG("ParticleDecayer::fillEvt: -- only one dark photon per LeptonJet");
            ATH_MSG_DEBUG("ParticleDecayer::fillEvt:   -- found MC particle with PDG ID = " << genpart->pdg_id());
            ATH_MSG_DEBUG("ParticleDecayer::fillEvt:   -- assign the new mass of the dark photon, m = " << m_particleMass);
  
            //Change the mass of the parent particle ( set by user input + command )
            //Changes the magnitude of the spatial part of the 4-momentum such that the new 4-momentum has the desired inv mass
            CHECK( changeMass( genpart, m_particleMass ) ); 
  
            //Add decay position to the event
            CHECK( setDecayPosition( engine, genpart, event ) );
  
            //assign the new PDG_ID of the particle
            ATH_MSG_DEBUG("ParticleDecayer::fillEvt:   -- set the new PDG ID =  " << m_particlePDGID);
            genpart->set_pdg_id(m_particlePDGID);  
            
            //set the new status (decayed) of the particle
            ATH_MSG_DEBUG("ParticleDecayer::fillEvt:   -- set the new status = 2");
            genpart->set_status(2); 
            
            //set the new momentum of the particle
            ATH_MSG_DEBUG("ParticleDecayer::fillEvt:   -- set the new momentum");
            
            CHECK( DFTwoBodyDecay( engine, genpart, m_particlePolarization ) );
  
         }
      }else if (m_LJType == 2) {
         //      two dark photons per LeptonJet     //
         if (genpart->pdg_id()==m_particleID) {
  
            ATH_MSG_DEBUG("ParticleDecayer::fillEvt: -- two dark photons per LeptonJet");
            ATH_MSG_DEBUG("ParticleDecayer::fillEvt:   -- found MC particle with PDG ID = " << genpart->pdg_id());
            ATH_MSG_DEBUG("ParticleDecayer::fillEvt:   -- assign the new mass of the dark scalar, m = " << m_scalarMass);
  
            //Get the mass of the parent particle ( set by user input + command )
            //Change the mass of the parent particle ( set by user input + command )
            //Changes the magnitude of the spatial part of the 4-momentum such that the new 4-momentum has the desired inv mass
            CHECK( changeMass( genpart, m_scalarMass ) ); 
  
            //set the new PDG_ID of the scalar
            ATH_MSG_DEBUG("ParticleDecayer::fillEvt:   -- set the new PDG ID =  " << m_scalarPDGID);
            genpart->set_pdg_id(m_scalarPDGID);  
  
            //set the new status (decayed) of the scalar
            ATH_MSG_DEBUG("ParticleDecayer::fillEvt:   -- set the new status = 2");
            genpart->set_status(2); 
  
            //set the decay vertex position of the scalar
            //Create a HepMC vertex at the decay position of the scalar 
            CHECK( setDecayPosition( engine, genpart, event, true ) );
            
            ATH_MSG_DEBUG("ParticleDecayer::fillEvt:   -- allow the two-body decay of the dark scalar to dark photons...");
            ATH_MSG_DEBUG("ParticleDecayer::fillEvt:   -- dark photon has PDG ID = " << m_particlePDGID);
  
            std::vector<CLHEP::HepLorentzVector> darkPhotonLVs; 
            CHECK( getDecayProducts( engine, CLHEP::HepLorentzVector( genpart->momentum().px(), genpart->momentum().py(), genpart->momentum().pz(), genpart->momentum().e() ),
                                     m_particleMass,
                                     darkPhotonLVs) );
  
            //add dark photon 1
            auto v0=darkPhotonLVs.at(0).vect();
            addParticle( genpart->end_vertex(), m_particlePDGID, HepMC::FourVector(v0.x(),v0.y(),v0.z(),0.0) , 2);
            //add dark photon 2
            auto v1=darkPhotonLVs.at(1).vect();
            addParticle( genpart->end_vertex(), m_particlePDGID, HepMC::FourVector(v1.x(),v1.y(),v1.z(),0.0), 2);
            
            //lifetime handling of the dark photons
            int polarizationSwitch = 1;
 #ifdef HEPMC3
            auto pItBegin = genpart->end_vertex()->particles_out().end();
            auto pItEnd = genpart->end_vertex()->particles_out().end();
 #else
            HepMC::GenVertex::particles_out_const_iterator pItBegin    = genpart->end_vertex()->particles_out_const_begin();
            HepMC::GenVertex::particles_out_const_iterator pItEnd = genpart->end_vertex()->particles_out_const_end();
 #endif
            for ( auto pIt=pItBegin ; pIt != pItEnd; ++pIt )
               {
                  //Add decay position to the event
                  CHECK( setDecayPosition( engine, *pIt, event ) );
                  //And perform two-body decay
                  ATH_MSG_DEBUG("ParticleDecayer::fillEvt:   -- Now allow the two-body decay of the dark photons");
                  CHECK( DFTwoBodyDecay( engine, *pIt, polarizationSwitch*m_particlePolarization ) );
                  if(m_oppositePolarization)
                     {
                        polarizationSwitch = -polarizationSwitch;
                     }
               }
  
         }
      }else
         {
            ATH_MSG_FATAL("LJType set to " << m_LJType );
            ATH_MSG_FATAL("LJType must be 1 or 2" );
            return StatusCode::FAILURE;
         }
   }
  
   //set the event number
   event->set_event_number(m_eventCounter);
   
   //Add a unit entry to the event weight vector if it's currently empty
   if (event->weights().empty()) {
      event->weights().push_back(1.); 
   }
   
   //increment the event counter
   m_eventCounter++;
   
   return status;
 }

◆ finalize()

StatusCode GenModule::finalize ( )

inlineinherited

Definition at line 55 of file GenModule.h.

55 { return genFinalize(); }

◆ genFinalize()

virtual StatusCode GenModule::genFinalize ( )

inlinevirtualinherited

For finalising the generator, if required.

Reimplemented in Hijing, Herwig7, CosmicGenerator, Pythia8_i, Hydjet, Starlight_i, Epos, BeamHaloGeneratorAlg, MultiParticleGunPileup, MultiPy8Pileup, Pythia8B_i, and Sherpa_i.

Definition at line 70 of file GenModule.h.

70 { return StatusCode::SUCCESS; }

◆ genInitialize()

StatusCode ParticleDecayer::genInitialize ( )

virtual

For initializing the generator, if required.

Reimplemented from GenModule.

Definition at line 257 of file ParticleDecayer.cxx.

 {
    // Check here if the tool has been configured correctly
    if(m_doUniformDecay && m_doExponentialDecay)
       {
          ATH_MSG_FATAL("Cannot configure exponential and uniform decay at the same time.");
          return StatusCode::FAILURE;
       }
  
    double TOTBR = m_BRElectron + m_BRMuon + m_BRPion;
    if (TOTBR>1.0000001) {
       ATH_MSG_FATAL("ParticleDecayer::genInitialize:   -- Branching Ratio sum is larger than 1!! Please check the values in your jobOption.");
       ATH_MSG_FATAL("ParticleDecayer::genInitialize:   -- Branching Ratio Electrons " << m_BRElectron);
       ATH_MSG_FATAL("ParticleDecayer::genInitialize:   -- Branching Ratio Muons     " << m_BRMuon);
       ATH_MSG_FATAL("ParticleDecayer::genInitialize:   -- Branching Ratio Pions     " << m_BRPion);
       ATH_MSG_FATAL("ParticleDecayer::genInitialize:   -- Total Branching Ratio     " << TOTBR);
       return StatusCode::FAILURE;
    }
  
    ATH_MSG_DEBUG("ParticleDecayer::fillEvt:   -- daughters randomly produced: " << m_BRElectron << "% e, " << m_BRMuon << "% mu, " << m_BRPion << "% pi");
  
    if( m_LJType != 1 && m_LJType != 2 )
       {
          ATH_MSG_FATAL("LJType is set to " << m_LJType);
          ATH_MSG_FATAL("LJType has to be set to either 1 or 2");
          return StatusCode::FAILURE;
       }
    
  
    return StatusCode::SUCCESS;
 }

◆ genuserInitialize()

virtual StatusCode GenModule::genuserInitialize ( )

inlinevirtualinherited

For initialization of user code, if required. Called after genInitialize.

Reimplemented in Pythia8B_i.

Definition at line 64 of file GenModule.h.

64 { return StatusCode::SUCCESS; }

◆ getDecayProducts()

StatusCode ParticleDecayer::getDecayProducts	(	CLHEP::HepRandomEngine *	engine,
		CLHEP::HepLorentzVector	parentLV,
		double	decayPartMass,
		std::vector< CLHEP::HepLorentzVector > &	daughterLVs,
		int	decayType = `0`
	)

private

Definition at line 528 of file ParticleDecayer.cxx.

 {
    double parentMass          = parentLV.m();
    CLHEP::Hep3Vector boostVec = parentLV.boostVector();
  
    if( decayPartMass > parentMass/2.)
       {
          ATH_MSG_FATAL("Decay particle has more than half the mass of parent.");
          return StatusCode::FAILURE;
       }
    //Get the angles in the rest frame
    double phi_rf   = rnd_DoubleRange(engine, -M_PI, M_PI);
    double ct_rf    = cosgen(engine, decayType);
    double theta_rf = std::acos(ct_rf);
  
    //construct p1 particle momentum in rest-frame (_rf)
    double p1_rf = std::sqrt(parentMass*parentMass/4. - decayPartMass*decayPartMass);
    double px_rf = p1_rf*std::cos(phi_rf)*std::sin(theta_rf);
    double py_rf = p1_rf*std::sin(phi_rf)*std::sin(theta_rf);
    double pz_rf = p1_rf*ct_rf;
    CLHEP::HepLorentzVector hlv1(  px_rf,  py_rf,  pz_rf, parentMass/2.);
    CLHEP::HepLorentzVector hlv2( -px_rf, -py_rf, -pz_rf, parentMass/2.);
  
    //Transform from the rotated frame to the (x,y,z) frame.
    hlv1.rotateUz((parentLV.vect()).unit());
    hlv2.rotateUz((parentLV.vect()).unit());
  
    //Now boost back to the lab-frame
    hlv1.boost(boostVec);
    hlv2.boost(boostVec);
  
    daughterLVs.push_back(hlv1);
    daughterLVs.push_back(hlv2);
  
    return StatusCode::SUCCESS;
 }

◆ getParticleMass()

double ParticleDecayer::getParticleMass ( int pdgID )

private

Definition at line 459 of file ParticleDecayer.cxx.

                                                {
   IPartPropSvc* partPropSvc = 0;
   StatusCode PartPropStatus = Gaudi::svcLocator()->service("PartPropSvc", partPropSvc);
   if (!PartPropStatus.isSuccess() || 0 == partPropSvc) throw GaudiException("PartPropSvc error", "I_ParticleDecayer", StatusCode::FAILURE);      
   m_particleTable = partPropSvc->PDT();
  
   const HepPDT::ParticleData* particle = m_particleTable->particle(HepPDT::ParticleID(std::abs(pid)));
   return particle->mass().value();
 } 

◆ getRandomEngine() [1/2]

CLHEP::HepRandomEngine * GenModule::getRandomEngine	(	const std::string &	streamName,
		const EventContext &	ctx
	)		const

protectedinherited

Definition at line 34 of file GenModule.cxx.

 {
   ATHRNG::RNGWrapper* rngWrapper = m_rndmSvc->getEngine(this, streamName);
   std::string rngName = name()+streamName;
   rngWrapper->setSeed( rngName, ctx );
   return rngWrapper->getEngine(ctx);
 }

◆ getRandomEngine() [2/2]

CLHEP::HepRandomEngine * GenModule::getRandomEngine	(	const std::string &	streamName,
		unsigned long int	randomSeedOffset,
		const EventContext &	ctx
	)		const

protectedinherited

Definition at line 44 of file GenModule.cxx.

 {
   ATHRNG::RNGWrapper* rngWrapper = m_rndmSvc->getEngine(this, streamName);
   rngWrapper->setSeed( streamName, ctx.slot(), randomSeedOffset, ctx.eventID().run_number() );
   return rngWrapper->getEngine(ctx);
 }

◆ getRandomEngineDuringInitialize()

CLHEP::HepRandomEngine * GenModule::getRandomEngineDuringInitialize	(	const std::string &	streamName,
		unsigned long int	randomSeedOffset,
		unsigned int	conditionsRun = `1`,
		unsigned int	lbn = `1`
	)		const

protectedinherited

Definition at line 53 of file GenModule.cxx.

 {
   const size_t slot=0;
   EventContext ctx;
   ctx.setSlot( slot );
   ctx.setEventID (EventIDBase (conditionsRun,
                EventIDBase::UNDEFEVT,  // event
                EventIDBase::UNDEFNUM,  // timestamp
                EventIDBase::UNDEFNUM,  // timestamp ns
                lbn));
   Atlas::setExtendedEventContext(ctx,
                                  Atlas::ExtendedEventContext( evtStore()->hiveProxyDict(),
                                                               conditionsRun) );
   return getRandomEngine(streamName, randomSeedOffset, ctx);
 }

◆ GeVToMeV()

void GenBase::GeVToMeV ( HepMC::GenEvent * evt )

protectedinherited

Scale event energies/momenta by x 1000.

Todo:: Add HepMC units awareness and do it differently when HepMC provides this functionality directly (and reference-based FourVector accessors)

Definition at line 61 of file GenBase.cxx.

                                          {
   for (HepMC::GenEvent::particle_iterator p = evt->particles_begin(); p != evt->particles_end(); ++p) {
     const HepMC::FourVector fv((*p)->momentum().px() * 1000,
                                (*p)->momentum().py() * 1000,
                                (*p)->momentum().pz() * 1000,
                                (*p)->momentum().e()  * 1000);
     (*p)->set_momentum(fv);
     (*p)->set_generated_mass(1000 * (*p)->generated_mass());
   }
 }

◆ initialize()

StatusCode GenModule::initialize ( )

virtualinherited

Reimplemented from GenBase.

Definition at line 21 of file GenModule.cxx.

                                  {
   // Base class initializations
   CHECK(GenBase::initialize());
   // Get the random number service
   CHECK(m_rndmSvc.retrieve());
   // Get the incident service
   CHECK(m_incidentSvc.retrieve());
   CHECK(genInitialize());
   CHECK(genuserInitialize());
   return StatusCode::SUCCESS;
 }

◆ inputHandles()

virtual std::vector<Gaudi::DataHandle*> AthCommonDataStore< AthCommonMsg< Algorithm > >::inputHandles ( ) const

overridevirtualinherited

Return this algorithm's input handles.

We override this to include handle instances from key arrays if they have not yet been declared. See comments on updateVHKA.

◆ MeVToGeV()

void GenBase::MeVToGeV ( HepMC::GenEvent * evt )

protectedinherited

Scale event energies/momenta by x 1/1000.

Definition at line 71 of file GenBase.cxx.

                                          {
   for (HepMC::GenEvent::particle_iterator p = evt->particles_begin(); p != evt->particles_end(); ++p) {
     const HepMC::FourVector fv((*p)->momentum().px() / 1000,
                                (*p)->momentum().py() / 1000,
                                (*p)->momentum().pz() / 1000,
                                (*p)->momentum().e()  / 1000);
     (*p)->set_momentum(fv);
     (*p)->set_generated_mass((*p)->generated_mass() / 1000);
   }
 }

◆ mmTocm()

void GenBase::mmTocm ( HepMC::GenEvent * evt )

protectedinherited

Scale event lengths by x 1/10.

Definition at line 90 of file GenBase.cxx.

                                        {
   for (HepMC::GenEvent::vertex_iterator vtx = evt->vertices_begin(); vtx != evt->vertices_end(); ++vtx) {
     const HepMC::FourVector fv((*vtx)->position().x() / 10,
                                (*vtx)->position().y() / 10,
                                (*vtx)->position().z() / 10,
                                (*vtx)->position().t() / 10);
     (*vtx)->set_position(fv);
   }
 }

◆ msg() [1/2]

MsgStream& AthCommonMsg< Algorithm >::msg ( ) const

inlineinherited

Definition at line 24 of file AthCommonMsg.h.

                                 {
     return this->msgStream();
   }

◆ msg() [2/2]

MsgStream& AthCommonMsg< Algorithm >::msg ( const MSG::Level lvl ) const

inlineinherited

Definition at line 27 of file AthCommonMsg.h.

                                                   {
     return this->msgStream(lvl);
   }

◆ msgLvl()

bool AthCommonMsg< Algorithm >::msgLvl ( const MSG::Level lvl ) const

inlineinherited

Definition at line 30 of file AthCommonMsg.h.

                                                {
     return this->msgLevel(lvl);
   }

◆ outputHandles()

virtual std::vector<Gaudi::DataHandle*> AthCommonDataStore< AthCommonMsg< Algorithm > >::outputHandles ( ) const

overridevirtualinherited

Return this algorithm's output handles.

We override this to include handle instances from key arrays if they have not yet been declared. See comments on updateVHKA.

◆ particleData()

const HepPDT::ParticleData* GenBase::particleData ( int pid ) const

inlineinherited

Access an element in the particle data table.

Definition at line 126 of file GenBase.h.

                                                         {
     return pdt().particle(HepPDT::ParticleID(std::abs(pid)));
   }

◆ particleTable()

const HepPDT::ParticleDataTable& GenBase::particleTable ( ) const

inlineinherited

Get a particle data table.

Definition at line 118 of file GenBase.h.

                                                        {
     return *(m_ppSvc->PDT());
   }

◆ partPropSvc()

const ServiceHandle<IPartPropSvc> GenBase::partPropSvc ( ) const

inlineinherited

Access the particle property service.

Definition at line 113 of file GenBase.h.

                                                         {
     return m_ppSvc;
   }

◆ pdt()

const HepPDT::ParticleDataTable& GenBase::pdt ( ) const

inlineinherited

Shorter alias to get a particle data table.

Definition at line 123 of file GenBase.h.

123 { return particleTable(); }

◆ renounce()

std::enable_if_t<std::is_void_v<std::result_of_t<decltype(&T::renounce)(T)> > && !std::is_base_of_v<SG::VarHandleKeyArray, T> && std::is_base_of_v<Gaudi::DataHandle, T>, void> AthCommonDataStore< AthCommonMsg< Algorithm > >::renounce ( T & h )

inlineprotectedinherited

Definition at line 380 of file AthCommonDataStore.h.

   {
     h.renounce();
     PBASE::renounce (h);
   }

◆ renounceArray()

void AthCommonDataStore< AthCommonMsg< Algorithm > >::renounceArray ( SG::VarHandleKeyArray & handlesArray )

inlineprotectedinherited

remove all handles from I/O resolution

Definition at line 364 of file AthCommonDataStore.h.

                                                           {
     handlesArray.renounce();
   }

◆ rnd_DoubleRange()

double ParticleDecayer::rnd_DoubleRange	(	CLHEP::HepRandomEngine *	engine,
		double	a,
		double	b
	)

private

Definition at line 39 of file ParticleDecayer.cxx.

                                                                                         {
   double r = engine->flat(); //< Return random num in [0,1]
   return a + r*(b-a);
 }

◆ rnd_ExpLifetime()

double ParticleDecayer::rnd_ExpLifetime	(	CLHEP::HepRandomEngine *	engine,
		double	ct
	)

private

Definition at line 32 of file ParticleDecayer.cxx.

                                                                                {
   double r = engine->flat(); //< Return random num in [0,1]
   return ((-ct)*std::log(1.-r));
 }

◆ setDecayPosition()

StatusCode ParticleDecayer::setDecayPosition	(	CLHEP::HepRandomEngine *	engine,
		HepMC::GenParticlePtr	genpart,
		HepMC::GenEvent *	event,
		bool	doScalarDecay = `false`
	)

private

Definition at line 118 of file ParticleDecayer.cxx.

 {
    HepMC::GenVertexPtr vtxp = genpart->production_vertex();
    if(!vtxp) {
       ATH_MSG_FATAL("ParticleDecayer::fillEvt: -- no production vertex position found!");
       return StatusCode::FAILURE;
    }
    if ( doScalarDecay ) // scalar decay is prompt. decay vtx == scalar production vertex
       {
          HepMC::GenVertexPtr end_vtx = HepMC::newGenVertexPtr();
          end_vtx->set_position(vtxp->position());
          end_vtx->add_particle_in(genpart);
          event->add_vertex(end_vtx);
          return StatusCode::SUCCESS;
       }
  
    //lifetime handling
    double gamma = genpart->momentum().e()/genpart->momentum().m();
    double ctau  = 0.;
    double theta = genpart->momentum().theta();
  
    // Make sure theta is between 0 and pi
    while( theta > M_PI )
       {                                                                                                                
          theta -= M_PI;                                                                                           
       }                                                                                                                
    while( theta < 0 )                                                                                                  
       {                                                                                                                
          theta += M_PI;
       }
  
    if (m_doExponentialDecay)
       {
          if(m_expDecayDoVariableLifetime) // Variable proper lifetime distribution, such that fixed fraction of events decays within detector, independent of boost
             {
                double distanceToEdge = -999.;
                if ( theta < m_thetaEndCapBarrel || theta > ( M_PI - m_thetaEndCapBarrel) ) // Particle escapes through endcap
                   {
                      distanceToEdge = std::abs(m_endCapDistance/std::cos(theta));
                   }
                else // Particle escapes through barrel
                   {
                      distanceToEdge = m_barrelRadius/std::sin(theta);
                   }
                if ( gamma < 1. )
                   {
                      ATH_MSG_FATAL("Gamma factor cannot be smaller than 1" );
                      return StatusCode::FAILURE;
                   }
                double Limit  = distanceToEdge / gamma; // ctau is enhanced by factor gamma in lab frame
                double lambda = -1.*Limit/std::log(1. - m_expDecayFractionToKeep);
                ctau = rnd_ExpLifetime(engine,lambda);
                if (m_expDecayDoTruncateLongDecays)
                   {
                      while ( ctau > Limit )  // If decay is outside detector, let's sample again (Produces a truncated exponential)
                         {
                           ctau = rnd_ExpLifetime(engine, lambda);
                         }
                   }
             }
          else if( m_particleLifeTime > 0 ) // Fixed proper lifetime distribution. Note that if m_particleLifeTime <= 0. ctau remains 0
             {
                ATH_MSG_DEBUG("ParticleDecayer::fillEvt:   -- set lifetime of the dark photon according to ctau = " << m_particleLifeTime);
                ctau = rnd_ExpLifetime(engine,m_particleLifeTime);
             }
       }else if (m_doUniformDecay)
       {         
          double decayRadius = -999.;
          if ( theta < m_thetaEndCapBarrel || theta > ( M_PI - m_thetaEndCapBarrel) ) // Particle escapes through endcap
             {
                double outerLength = std::abs(m_endCapDistance/std::cos(theta));
                double outerRadius = outerLength*std::sin(theta);
                decayRadius        = rnd_DoubleRange(engine,0., std::min(outerRadius, std::abs(m_barrelRadius)) );
             }else // Particle escapes through barrel
             {
                decayRadius = rnd_DoubleRange(engine,0., std::abs(m_barrelRadius));
             }
  
          double decayLength = decayRadius/std::sin(theta);
          ctau = decayLength/gamma;
       }else
       {
          ATH_MSG_FATAL("have to pick uniform or exponential decay distance");
          return StatusCode::FAILURE;
       }
    
    double ctg = gamma * ctau;
    double px = genpart->momentum().px();
    double py = genpart->momentum().py();
    double pz = genpart->momentum().pz();
    double p  = std::sqrt(px*px + py*py + pz*pz);
  
    const CLHEP::HepLorentzVector posLV(((ctg*px/p)+(vtxp->position().x())), ((ctg*py/p)+(vtxp->position().y())), ((ctg*pz/p)+(vtxp->position().z())), ((ctg)+(vtxp->position().t())));
  
    //set the decay vertex position of the particle
    //Create a HepMC vertex at the decay position of the particle 
    ATH_MSG_DEBUG("ParticleDecayer::fillEvt:   -- set the decay vertex");
    HepMC::GenVertexPtr end_vtx = HepMC::newGenVertexPtr();
    end_vtx->set_position(HepMC::FourVector(posLV.x(),posLV.y(),posLV.z(),posLV.t()));
    end_vtx->add_particle_in(genpart);
    event->add_vertex(end_vtx);
    return StatusCode::SUCCESS;
 }

◆ sysInitialize()

StatusCode AthAlgorithm::sysInitialize ( )

overridevirtualinherited

Override sysInitialize.

Override sysInitialize from the base class.

Loop through all output handles, and if they're WriteCondHandles, automatically register them and this Algorithm with the CondSvc

Scan through all outputHandles, and if they're WriteCondHandles, register them with the CondSvc

Reimplemented from AthCommonDataStore< AthCommonMsg< Algorithm > >.

Reimplemented in AthAnalysisAlgorithm, AthFilterAlgorithm, PyAthena::Alg, and AthHistogramAlgorithm.

Definition at line 66 of file AthAlgorithm.cxx.

                                        {
   StatusCode sc=AthCommonDataStore<AthCommonMsg<Algorithm>>::sysInitialize();
  
   if (sc.isFailure()) {
     return sc;
   }
   ServiceHandle<ICondSvc> cs("CondSvc",name());
   for (auto h : outputHandles()) {
     if (h->isCondition() && h->mode() == Gaudi::DataHandle::Writer) {
       // do this inside the loop so we don't create the CondSvc until needed
       if ( cs.retrieve().isFailure() ) {
         ATH_MSG_WARNING("no CondSvc found: won't autoreg WriteCondHandles");
         return StatusCode::SUCCESS;
       }
       if (cs->regHandle(this,*h).isFailure()) {
         sc = StatusCode::FAILURE;
         ATH_MSG_ERROR("unable to register WriteCondHandle " << h->fullKey()
                       << " with CondSvc");
       }
     }
   }
   return sc;
 }

◆ sysStart()

virtual StatusCode AthCommonDataStore< AthCommonMsg< Algorithm > >::sysStart ( )

overridevirtualinherited

Handle START transition.

We override this in order to make sure that conditions handle keys can cache a pointer to the conditions container.

◆ updateVHKA()

void AthCommonDataStore< AthCommonMsg< Algorithm > >::updateVHKA ( Gaudi::Details::PropertyBase & )

inlineinherited

Definition at line 308 of file AthCommonDataStore.h.

                                                {
     // debug() << "updateVHKA for property " << p.name() << " " << p.toString() 
     //         << "  size: " << m_vhka.size() << endmsg;
     for (auto &a : m_vhka) {
       std::vector<SG::VarHandleKey*> keys = a->keys();
       for (auto k : keys) {
         k->setOwner(this);
       }
     }
   }

Member Data Documentation

◆ m_barrelRadius

double ParticleDecayer::m_barrelRadius

private

Definition at line 73 of file ParticleDecayer.h.

◆ m_boostLV

CLHEP::HepLorentzVector ParticleDecayer::m_boostLV

private

Definition at line 92 of file ParticleDecayer.h.

◆ m_BRElectron

double ParticleDecayer::m_BRElectron {}

private

Definition at line 61 of file ParticleDecayer.h.

◆ m_BRMuon

double ParticleDecayer::m_BRMuon {}

private

Definition at line 63 of file ParticleDecayer.h.

◆ m_BRPion

double ParticleDecayer::m_BRPion {}

private

Definition at line 65 of file ParticleDecayer.h.

◆ m_detStore

StoreGateSvc_t AthCommonDataStore< AthCommonMsg< Algorithm > >::m_detStore

privateinherited

Pointer to StoreGate (detector store by default)

Definition at line 393 of file AthCommonDataStore.h.

◆ m_doExponentialDecay

bool ParticleDecayer::m_doExponentialDecay {}

private

Definition at line 68 of file ParticleDecayer.h.

◆ m_doUniformDecay

bool ParticleDecayer::m_doUniformDecay {}

private

Definition at line 67 of file ParticleDecayer.h.

◆ m_endCapDistance

double ParticleDecayer::m_endCapDistance

private

Definition at line 74 of file ParticleDecayer.h.

◆ m_eventCounter

int ParticleDecayer::m_eventCounter

private

Definition at line 100 of file ParticleDecayer.h.

◆ m_evtStore

StoreGateSvc_t AthCommonDataStore< AthCommonMsg< Algorithm > >::m_evtStore

privateinherited

Pointer to StoreGate (event store by default)

Definition at line 390 of file AthCommonDataStore.h.

◆ m_expDecayDoTruncateLongDecays

bool ParticleDecayer::m_expDecayDoTruncateLongDecays {}

private

Definition at line 71 of file ParticleDecayer.h.

◆ m_expDecayDoVariableLifetime

bool ParticleDecayer::m_expDecayDoVariableLifetime {}

private

Definition at line 69 of file ParticleDecayer.h.

◆ m_expDecayFractionToKeep

double ParticleDecayer::m_expDecayFractionToKeep {}

private

Definition at line 70 of file ParticleDecayer.h.

◆ m_extendedExtraObjects

DataObjIDColl AthAlgorithm::m_extendedExtraObjects

privateinherited

Definition at line 79 of file AthAlgorithm.h.

◆ m_incidentSvc

ServiceHandle<IIncidentSvc> GenModule::m_incidentSvc {this, "IncidentSvc", "IncidentSvc"}

privateinherited

Handle on the incident service.

Definition at line 101 of file GenModule.h.

◆ m_isAfterburner

BooleanProperty GenModule::m_isAfterburner {this, "IsAfterburner", false, "Set true if generator modifies existing events rather than creating new ones"}

protectedinherited

Flag for normal vs. afterburner generators.

Definition at line 87 of file GenModule.h.

◆ m_LJType

int ParticleDecayer::m_LJType {}

private

Definition at line 42 of file ParticleDecayer.h.

◆ m_mcEventKey

std::string GenBase::m_mcEventKey {}

protectedinherited

StoreGate key for the MC event collection (defaults to GEN_EVENT)

Definition at line 137 of file GenBase.h.

◆ m_mcevents_const

SG::ReadHandleKey<McEventCollection> GenBase::m_mcevents_const { this, "McEventKey", "GEN_EVENT", "StoreGate key of the MC event collection" }

privateinherited

Const handle to the MC event collection.

Definition at line 163 of file GenBase.h.

◆ m_mkMcEvent

BooleanProperty GenBase::m_mkMcEvent {this, "MakeMcEvent", false, "Create a new MC event collection if it doesn't exist"}

protectedinherited

Flag to determine if a new MC event collection should be made if it doesn't exist.

Definition at line 139 of file GenBase.h.

◆ m_oppositePolarization

bool ParticleDecayer::m_oppositePolarization {}

private

Definition at line 58 of file ParticleDecayer.h.

◆ m_particleID

int ParticleDecayer::m_particleID {}

private

Definition at line 50 of file ParticleDecayer.h.

◆ m_particleLifeTime

double ParticleDecayer::m_particleLifeTime {}

private

Definition at line 52 of file ParticleDecayer.h.

◆ m_particleMass

double ParticleDecayer::m_particleMass {}

private

Definition at line 48 of file ParticleDecayer.h.

◆ m_particlePDGID

int ParticleDecayer::m_particlePDGID {}

private

Definition at line 54 of file ParticleDecayer.h.

◆ m_particlePolarization

int ParticleDecayer::m_particlePolarization {}

private

Definition at line 56 of file ParticleDecayer.h.

◆ m_particleTable

HepPDT::ParticleDataTable* ParticleDecayer::m_particleTable {}

private

Definition at line 77 of file ParticleDecayer.h.

◆ m_posLV

CLHEP::HepLorentzVector ParticleDecayer::m_posLV

private

Definition at line 94 of file ParticleDecayer.h.

◆ m_posLV1

CLHEP::HepLorentzVector ParticleDecayer::m_posLV1

private

Definition at line 96 of file ParticleDecayer.h.

◆ m_posLV2

CLHEP::HepLorentzVector ParticleDecayer::m_posLV2

private

Definition at line 98 of file ParticleDecayer.h.

◆ m_ppSvc

ServiceHandle<IPartPropSvc> GenBase::m_ppSvc {this, "PartPropSvc", "PartPropSvc"}

privateinherited

Handle on the particle property service.

Definition at line 160 of file GenBase.h.

◆ m_randomSeed

IntegerProperty GenModule::m_randomSeed {this, "RandomSeed", 1234567, "Random seed for the built-in random engine"}

protectedinherited

Seed for random number engine.

Definition at line 84 of file GenModule.h.

◆ m_rndmSvc

ServiceHandle<IAthRNGSvc> GenModule::m_rndmSvc {this, "RndmSvc", "AthRNGSvc"}

privateinherited

Data members.

Definition at line 99 of file GenModule.h.

◆ m_scalarMass

double ParticleDecayer::m_scalarMass {}

private

Definition at line 46 of file ParticleDecayer.h.

◆ m_scalarPDGID

int ParticleDecayer::m_scalarPDGID {}

private

Definition at line 44 of file ParticleDecayer.h.

◆ m_thetaEndCapBarrel

double ParticleDecayer::m_thetaEndCapBarrel

private

Definition at line 75 of file ParticleDecayer.h.

◆ m_truthParticleContainerName

std::string ParticleDecayer::m_truthParticleContainerName

private

Definition at line 40 of file ParticleDecayer.h.

◆ m_varHandleArraysDeclared

bool AthCommonDataStore< AthCommonMsg< Algorithm > >::m_varHandleArraysDeclared

privateinherited

Definition at line 399 of file AthCommonDataStore.h.

◆ m_vhka

std::vector<SG::VarHandleKeyArray*> AthCommonDataStore< AthCommonMsg< Algorithm > >::m_vhka

privateinherited

Definition at line 398 of file AthCommonDataStore.h.

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

Public Member Functions

Protected Member Functions

Private Types

Private Member Functions

Private Attributes

Utility event-mangling functions

Gen-specific event loop methods: to be overloaded

Features for derived classes to use internally

Detailed Description

Member Typedef Documentation

◆ StoreGateSvc_t

Constructor & Destructor Documentation

◆ ParticleDecayer()

◆ ~ParticleDecayer()

Member Function Documentation

◆ addParticle()

◆ ATLAS_NOT_CONST_THREAD_SAFE() [1/2]

◆ ATLAS_NOT_CONST_THREAD_SAFE() [2/2]

◆ callGenerator()

◆ changeMass()

◆ cmTomm()

◆ cosgen()

◆ declareGaudiProperty() [1/4]

◆ declareGaudiProperty() [2/4]

◆ declareGaudiProperty() [3/4]

◆ declareGaudiProperty() [4/4]

◆ declareProperty() [1/6]

◆ declareProperty() [2/6]

◆ declareProperty() [3/6]

◆ declareProperty() [4/6]

◆ declareProperty() [5/6]

◆ declareProperty() [6/6]

◆ detStore()

◆ DFTwoBodyDecay()

◆ event_const()

◆ events_const() [1/2]

◆ events_const() [2/2]

◆ evtStore() [1/2]

◆ evtStore() [2/2]

◆ execute()

◆ extraDeps_update_handler()

◆ extraOutputDeps()

◆ fillEvt()

◆ finalize()

◆ genFinalize()

◆ genInitialize()

◆ genuserInitialize()

◆ getDecayProducts()

◆ getParticleMass()

◆ getRandomEngine() [1/2]

◆ getRandomEngine() [2/2]

◆ getRandomEngineDuringInitialize()

◆ GeVToMeV()

◆ initialize()

◆ inputHandles()

◆ MeVToGeV()

◆ mmTocm()

◆ msg() [1/2]

◆ msg() [2/2]

◆ msgLvl()

◆ outputHandles()

◆ particleData()

◆ particleTable()

◆ partPropSvc()

◆ pdt()

◆ renounce()

◆ renounceArray()

◆ rnd_DoubleRange()

◆ rnd_ExpLifetime()

◆ setDecayPosition()

◆ sysInitialize()

◆ sysStart()

◆ updateVHKA()

Member Data Documentation

◆ m_barrelRadius

◆ m_boostLV

◆ m_BRElectron

◆ m_BRMuon

◆ m_BRPion

◆ m_detStore