genie::RSPPResonanceSelector Class Reference

Generates an intermediate baryon resonance for exclusive interactions proceeding through resonance productions and adds it to the event record. The resonance is selected based on its contribution to the selected exclusive reaction cross section. Is a concrete implementation of the EventRecordVisitorI interface. More...

#include <RSPPResonanceSelector.h>

Inheritance diagram for genie::RSPPResonanceSelector:

Collaboration diagram for genie::RSPPResonanceSelector:

Public Member Functions
	RSPPResonanceSelector ()
	RSPPResonanceSelector (string config)
	~RSPPResonanceSelector ()
void	ProcessEventRecord (GHepRecord *event_rec) const
void	Configure (const Registry &config)
void	Configure (string param_set)
Public Member Functions inherited from genie::HadronicSystemGenerator
void	AddTargetNucleusRemnant (GHepRecord *event_rec) const
void	AddFinalHadronicSyst (GHepRecord *event_rec) const
void	PreHadronTransportDecays (GHepRecord *event_rec) const
TLorentzVector	Hadronic4pLAB (GHepRecord *event_rec) const
TLorentzVector	MomentumTransferLAB (GHepRecord *event_rec) const
TVector3	HCM2LAB (GHepRecord *event_rec) const
int	HadronShowerCharge (GHepRecord *event_rec) const
int	ResonanceCharge (GHepRecord *event_rec) const
Public Member Functions inherited from genie::EventRecordVisitorI
virtual	~EventRecordVisitorI ()
Public Member Functions inherited from genie::Algorithm
virtual	~Algorithm ()
virtual void	FindConfig (void)
virtual const Registry &	GetConfig (void) const
Registry *	GetOwnedConfig (void)
virtual const AlgId &	Id (void) const
	Get algorithm ID.
virtual AlgStatus_t	GetStatus (void) const
	Get algorithm status.
virtual bool	AllowReconfig (void) const
virtual AlgCmp_t	Compare (const Algorithm *alg) const
	Compare with input algorithm.
virtual void	SetId (const AlgId &id)
	Set algorithm ID.
virtual void	SetId (string name, string config)
const Algorithm *	SubAlg (const RgKey &registry_key) const
void	AdoptConfig (void)
void	AdoptSubstructure (void)
virtual void	Print (ostream &stream) const
	Print algorithm info.

Private Member Functions
void	LoadConfig (void)
Resonance_t	SelectResonance (GHepRecord *event_rec) const
void	AddResonance (GHepRecord *event_rec) const

Private Attributes
BaryonResList	fResList
	baryon resonances taken into account

Additional Inherited Members
Static Public Member Functions inherited from genie::Algorithm
static string	BuildParamVectKey (const std::string &comm_name, unsigned int i)
static string	BuildParamVectSizeKey (const std::string &comm_name)
static string	BuildParamMatKey (const std::string &comm_name, unsigned int i, unsigned int j)
static string	BuildParamMatRowSizeKey (const std::string &comm_name)
static string	BuildParamMatColSizeKey (const std::string &comm_name)
Protected Member Functions inherited from genie::HadronicSystemGenerator
	HadronicSystemGenerator ()
	HadronicSystemGenerator (string name)
	HadronicSystemGenerator (string name, string config)
	~HadronicSystemGenerator ()
Protected Member Functions inherited from genie::EventRecordVisitorI
	EventRecordVisitorI ()
	EventRecordVisitorI (string name)
	EventRecordVisitorI (string name, string config)
Protected Member Functions inherited from genie::Algorithm
	Algorithm ()
	Algorithm (string name)
	Algorithm (string name, string config)
void	Initialize (void)
void	DeleteConfig (void)
void	DeleteSubstructure (void)
Registry *	ExtractLocalConfig (const Registry &in) const
Registry *	ExtractLowerConfig (const Registry &in, const string &alg_key) const
	Split an incoming configuration Registry into a block valid for the sub-algo identified by alg_key.
template<class T>
bool	GetParam (const RgKey &name, T &p, bool is_top_call=true) const
template<class T>
bool	GetParamDef (const RgKey &name, T &p, const T &def) const
template<class T>
int	GetParamVect (const std::string &comm_name, std::vector< T > &v, bool is_top_call=true) const
	Handle to load vectors of parameters.
int	GetParamVectKeys (const std::string &comm_name, std::vector< RgKey > &k, bool is_top_call=true) const
template<class T>
int	GetParamMat (const std::string &comm_name, TMatrixT< T > &mat, bool is_top_call=true) const
	Handle to load matrix of parameters.
template<class T>
int	GetParamMatSym (const std::string &comm_name, TMatrixTSym< T > &mat, bool is_top_call=true) const
int	GetParamMatKeys (const std::string &comm_name, std::vector< RgKey > &k, bool is_top_call=true) const
int	AddTopRegistry (Registry *rp, bool owns=true)
	add registry with top priority, also update ownership
int	AddLowRegistry (Registry *rp, bool owns=true)
	add registry with lowest priority, also update ownership
int	MergeTopRegistry (const Registry &r)
int	AddTopRegisties (const vector< Registry * > &rs, bool owns=false)
	Add registries with top priority, also udated Ownerships.
Protected Attributes inherited from genie::HadronicSystemGenerator
const EventRecordVisitorI *	fPreINukeDecayer
Protected Attributes inherited from genie::Algorithm
bool	fAllowReconfig
bool	fOwnsSubstruc
	true if it owns its substructure (sub-algs,...)
AlgId	fID
	algorithm name and configuration set
vector< Registry * >	fConfVect
vector< bool >	fOwnerships
	ownership for every registry in fConfVect
AlgStatus_t	fStatus
	algorithm execution status
AlgMap *	fOwnedSubAlgMp
	local pool for owned sub-algs (taken out of the factory pool)

Detailed Description

Generates an intermediate baryon resonance for exclusive interactions proceeding through resonance productions and adds it to the event record. The resonance is selected based on its contribution to the selected exclusive reaction cross section. Is a concrete implementation of the EventRecordVisitorI interface.

Author

Costas Andreopoulos <c.andreopoulos \at cern.ch> University of Liverpool

Created:\n November 18, 2004

License:\n Copyright (c) 2003-2025, The GENIE Collaboration

For the full text of the license visit http://copyright.genie-mc.org

Definition at line 31 of file RSPPResonanceSelector.h.

Constructor & Destructor Documentation

RSPPResonanceSelector() [1/2]

RSPPResonanceSelector::RSPPResonanceSelector

(

)

Definition at line 34 of file RSPPResonanceSelector.cxx.

                                             :
HadronicSystemGenerator("genie::RSPPResonanceSelector")
{
 
}

References genie::HadronicSystemGenerator::HadronicSystemGenerator().

RSPPResonanceSelector() [2/2]

RSPPResonanceSelector::RSPPResonanceSelector

(

string

config

)

Definition at line 40 of file RSPPResonanceSelector.cxx.

                                                          :
HadronicSystemGenerator("genie::RSPPResonanceSelector", config)
{
 
}

References genie::HadronicSystemGenerator::HadronicSystemGenerator().

~RSPPResonanceSelector()

RSPPResonanceSelector::~RSPPResonanceSelector

(

)

Definition at line 46 of file RSPPResonanceSelector.cxx.

{
 
}

Member Function Documentation

AddResonance()

void RSPPResonanceSelector::AddResonance ( GHepRecord * event_rec ) const

private

Definition at line 155 of file RSPPResonanceSelector.cxx.

{
  // compute RES p4 = p4(neutrino) + p4(hit nucleon) - p4(primary lepton)
  TLorentzVector p4 = this->Hadronic4pLAB(evrec);
 
  //-- Determine the RES pdg code (from the selected Resonance_t & charge)
  Interaction * interaction = evrec->Summary();
  Resonance_t res = interaction->ExclTag().Resonance();
  int charge = this->ResonanceCharge(evrec);
  int pdgc   = utils::res::PdgCode(res,charge);
 
  LOG("RESSelector", pNOTICE)
               << "Adding RES with PDGC = " << pdgc << ", Q = " << charge;
 
  //-- Add the resonance at the EventRecord
  GHepStatus_t ist = kIStPreDecayResonantState;
  int mom = evrec->HitNucleonPosition();
 
  evrec->AddParticle(
        pdgc, ist, mom,-1,-1,-1, p4.Px(),p4.Py(),p4.Pz(),p4.E(), 0,0,0,0);
}

References genie::GHepRecord::AddParticle(), genie::Interaction::ExclTag(), genie::HadronicSystemGenerator::Hadronic4pLAB(), genie::GHepRecord::HitNucleonPosition(), genie::kIStPreDecayResonantState, LOG, genie::utils::res::PdgCode(), pNOTICE, genie::XclsTag::Resonance(), genie::HadronicSystemGenerator::ResonanceCharge(), and genie::GHepRecord::Summary().

Referenced by ProcessEventRecord().

Configure() [1/2]

void RSPPResonanceSelector::Configure ( const Registry & config )

virtual

Configure the algorithm with an external registry The registry is merged with the top level registry if it is owned, Otherwise a copy of it is added with the highest priority

Reimplemented from genie::Algorithm.

Definition at line 177 of file RSPPResonanceSelector.cxx.

{
  Algorithm::Configure(config);
  this->LoadConfig();
}

References genie::Algorithm::Configure(), and LoadConfig().

Configure() [2/2]

void RSPPResonanceSelector::Configure ( string config )

virtual

Configure the algorithm from the AlgoConfigPool based on param_set string given in input An algorithm contains a vector of registries coming from different xml configuration files, which are loaded according a very precise prioriy This methods will load a number registries in order of priority: 1) "Tunable" parameter set from CommonParametes. This is loaded with the highest prioriry and it is designed to be used for tuning procedure Usage not expected from the user. 2) For every string defined in "CommonParame" the corresponding parameter set will be loaded from CommonParameter.xml 3) parameter set specified by the config string and defined in the xml file of the algorithm 4) if config is not "Default" also the Default parameter set from the same xml file will be loaded Effectively this avoids the repetion of a parameter when it is not changed in the requested configuration

Reimplemented from genie::Algorithm.

Definition at line 183 of file RSPPResonanceSelector.cxx.

{
  Algorithm::Configure(param_set);
  this->LoadConfig();
}

References genie::Algorithm::Configure(), and LoadConfig().

LoadConfig()

void RSPPResonanceSelector::LoadConfig ( void )

private

Definition at line 189 of file RSPPResonanceSelector.cxx.

{
  fResList.Clear();
  string resonances = "";
  this->GetParam("ResonanceNameList", resonances);
  SLOG("RESSelector", pDEBUG) << "Resonance list: " << resonances;
 
  fResList.DecodeFromNameList(resonances);
  LOG("RESSelector", pINFO) << fResList;
}

References fResList, genie::Algorithm::GetParam(), LOG, pDEBUG, pINFO, and SLOG.

Referenced by Configure(), and Configure().

ProcessEventRecord()

void RSPPResonanceSelector::ProcessEventRecord ( GHepRecord * event_rec ) const

virtual

Implements genie::EventRecordVisitorI.

Definition at line 51 of file RSPPResonanceSelector.cxx.

{
  //-- select a baryon resonance
  Resonance_t res = this->SelectResonance(evrec);
  assert(res != kNoResonance);
 
  //-- add the resonance at the event summary
  Interaction * interaction = evrec->Summary();
  interaction->ExclTagPtr()->SetResonance(res);
 
  //-- add an entry at the GHep event record & the event summary
  this->AddResonance(evrec);
}

References AddResonance(), genie::Interaction::ExclTagPtr(), genie::kNoResonance, SelectResonance(), genie::XclsTag::SetResonance(), and genie::GHepRecord::Summary().

SelectResonance()

Resonance_t RSPPResonanceSelector::SelectResonance ( GHepRecord * event_rec ) const

private

Definition at line 65 of file RSPPResonanceSelector.cxx.

{
// Select a baryon resonance from a list of considered resonances based on
// their differential d^2xsec/dWdQ^2 cross sections
 
  LOG("RESSelector", pNOTICE) << "Selecting a baryon resonance";
 
  Interaction * interaction = evrec->Summary();
 
  //-- Figure out what the resonance charge should be.
  int q_res = this->ResonanceCharge(evrec);
 
  //-- Use selected kinematics
  interaction->KinePtr()->UseSelectedKinematics();
 
  //-- Trust kinematics and process type already set.
  interaction->SetBit(kISkipProcessChk);
  interaction->SetBit(kISkipKinematicChk);
 
  //-- Access cross section algorithm for running thread
  //   The algorithm must be able to compute the RES contribution to
  //   the specified RES/SPP channel
  RunningThreadInfo * rtinfo = RunningThreadInfo::Instance();
  const EventGeneratorI * evg = rtinfo->RunningThread();
  const XSecAlgorithmI * xsecalg = evg->CrossSectionAlg();
 
  //-- Loop over all considered baryon resonances and compute the double
  //   differential cross section for the selected kinematical variables
 
  double xsec_sum  = 0;
  unsigned int nres = fResList.NResonances();
  vector<double> xsec_vec(nres);
 
  for(unsigned int ires = 0; ires < nres; ires++) {
 
     //-- Current resonance
     Resonance_t res = fResList.ResonanceId(ires);
 
     //-- Set the current resonance at the interaction summary
     //   compute the differential cross section d^2xsec/dWdQ^2
     //   (do it only for resonances that can conserve charge)
     interaction->ExclTagPtr()->SetResonance(res);
 
     double xsec = 0;
     bool   skip = (q_res==2 && !utils::res::IsDelta(res));
 
     if(!skip) xsec = xsecalg->XSec(interaction,kPSWQ2fE);
     else {
       SLOG("RESSelector", pNOTICE)
                 << "RES: " << utils::res::AsString(res)
                         << " would not conserve charge -- skipping it";
     }
     //-- For the ith resonance store the sum of (xsec) * (breit-wigner)
     //   for the resonances in the range [0,i]
     xsec_sum      += xsec;
     xsec_vec[ires] = xsec_sum;
 
     SLOG("RESSelector", pNOTICE)
          << "Resonances (0->" << ires << "): "
           << "Sum{ BW(W) * d^2xsec(E,W,Q^2)/dWd*Q^2 } = "  << xsec_sum;
  } // res
 
  //-- Reset 'trust' bits
  interaction->ResetBit(kISkipProcessChk);
  interaction->ResetBit(kISkipKinematicChk);
 
  //-- Reset running kinematics
  interaction->KinePtr()->ClearRunningValues();
 
  //-- Use the computed differential cross sections to select a resonance
  RandomGen * rnd = RandomGen::Instance();
  double R = xsec_sum * rnd->RndGen().Rndm();
 
  SLOG("RESSelector", pDEBUG) << "R = " << R;
 
  for(unsigned int ires = 0; ires < nres; ires++) {
     SLOG("RESSelector", pDEBUG)
                    << "SUM-XSEC(0->" << ires <<") = " << xsec_vec[ires];
 
     if(R < xsec_vec[ires]) {
        Resonance_t sres = fResList.ResonanceId(ires); // selected RES.
        LOG("RESSelector", pNOTICE)
                   << "Selected RES = " << utils::res::AsString(sres);
        return sres;
     }
  }
  LOG("RESSelector", pERROR) << "** Failed to select a resonance";
  return kNoResonance;
}

References genie::utils::res::AsString(), genie::Kinematics::ClearRunningValues(), genie::EventGeneratorI::CrossSectionAlg(), genie::Interaction::ExclTagPtr(), fResList, genie::RandomGen::Instance(), genie::RunningThreadInfo::Instance(), genie::utils::res::IsDelta(), genie::Interaction::KinePtr(), genie::kISkipKinematicChk, genie::kISkipProcessChk, genie::kNoResonance, genie::kPSWQ2fE, LOG, pDEBUG, pERROR, pNOTICE, genie::HadronicSystemGenerator::ResonanceCharge(), genie::RandomGen::RndGen(), genie::RunningThreadInfo::RunningThread(), genie::XclsTag::SetResonance(), SLOG, genie::GHepRecord::Summary(), genie::Kinematics::UseSelectedKinematics(), and genie::XSecAlgorithmI::XSec().

Referenced by ProcessEventRecord().

Member Data Documentation

fResList

BaryonResList genie::RSPPResonanceSelector::fResList

private

baryon resonances taken into account

Definition at line 52 of file RSPPResonanceSelector.h.

Referenced by LoadConfig(), and SelectResonance().

---

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

• RSPPResonanceSelector.h
• RSPPResonanceSelector.cxx