Base class for the Pythia (6 and 8) hadronization modules in GENIE. In particular, the base class provides common checks and basic assignments of quark/diquark codes for a no frills interface to Pythia hadronization routines. More...

#include <PythiaBaseHadro2019.h>

Inheritance diagram for genie::PythiaBaseHadro2019:

[legend]

Collaboration diagram for genie::PythiaBaseHadro2019:

[legend]

Protected Member Functions
	PythiaBaseHadro2019 ()
	PythiaBaseHadro2019 (string name)
	PythiaBaseHadro2019 (string name, string config)
virtual	~PythiaBaseHadro2019 ()
virtual void	ProcessEventRecord (GHepRecord *event) const
virtual void	MakeQuarkDiquarkAssignments (const Interaction *in) const
virtual bool	AssertValidity (const Interaction *in) const
virtual void	Initialize (void)
virtual void	LoadConfig (void)
virtual void	CopyOriginalDecayFlags (void) const =0
virtual void	SetDesiredDecayFlags (void) const =0
virtual void	RestoreOriginalDecayFlags (void) const =0
virtual bool	Hadronize (GHepRecord *event) const =0
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
int	fLeadingQuark
int	fRemnantDiquark
double	fSSBarSuppression
	ssbar suppression
double	fGaussianPt2
	gaussian pt2 distribution width
double	fNonGaussianPt2Tail
	non gaussian pt2 tail parameterization
double	fRemainingECutoff
	remaining E cutoff stopping fragmentation
double	fDiQuarkSuppression
	di-quark suppression parameter
double	fLightVMesonSuppression
	light vector meson suppression
double	fSVMesonSuppression
	strange vector meson suppression
double	fLunda
	Lund a parameter.
double	fLundb
	Lund b parameter.
double	fLundaDiq
	adjustment of Lund a for di-quark
bool	fOriDecayFlag_pi0
bool	fOriDecayFlag_K0
bool	fOriDecayFlag_K0b
bool	fOriDecayFlag_L0
bool	fOriDecayFlag_L0b
bool	fOriDecayFlag_Dm
bool	fOriDecayFlag_D0
bool	fOriDecayFlag_Dp
bool	fOriDecayFlag_Dpp
bool	fReqDecayFlag_pi0
bool	fReqDecayFlag_K0
bool	fReqDecayFlag_K0b
bool	fReqDecayFlag_L0
bool	fReqDecayFlag_L0b
bool	fReqDecayFlag_Dm
bool	fReqDecayFlag_D0
bool	fReqDecayFlag_Dp
bool	fReqDecayFlag_Dpp
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)

Additional Inherited Members
Public Member Functions inherited from genie::EventRecordVisitorI
virtual	~EventRecordVisitorI ()
Public Member Functions inherited from genie::Algorithm
virtual	~Algorithm ()
virtual void	Configure (const Registry &config)
virtual void	Configure (string config)
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.
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)

Detailed Description

Base class for the Pythia (6 and 8) hadronization modules in GENIE. In particular, the base class provides common checks and basic assignments of quark/diquark codes for a no frills interface to Pythia hadronization routines.

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

Created:\n August 17, 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 29 of file PythiaBaseHadro2019.h.

Constructor & Destructor Documentation

◆ PythiaBaseHadro2019() [1/3]

PythiaBaseHadro2019::PythiaBaseHadro2019 ( )

protected

Definition at line 32 of file PythiaBaseHadro2019.cxx.

                                         :
EventRecordVisitorI()
{
 
}

References genie::EventRecordVisitorI::EventRecordVisitorI().

Referenced by genie::Pythia6Hadro2019::Pythia6Hadro2019(), genie::Pythia6Hadro2019::Pythia6Hadro2019(), genie::Pythia8Hadro2019::Pythia8Hadro2019(), and genie::Pythia8Hadro2019::Pythia8Hadro2019().

◆ PythiaBaseHadro2019() [2/3]

PythiaBaseHadro2019::PythiaBaseHadro2019 ( string name )

protected

Definition at line 38 of file PythiaBaseHadro2019.cxx.

                                                    :
EventRecordVisitorI(name)
{
 
}

References genie::EventRecordVisitorI::EventRecordVisitorI().

◆ PythiaBaseHadro2019() [3/3]

PythiaBaseHadro2019::PythiaBaseHadro2019	(	string	name,
		string	config )

protected

Definition at line 44 of file PythiaBaseHadro2019.cxx.

                                                                   :
EventRecordVisitorI(name, config)
{
 
}

References genie::EventRecordVisitorI::EventRecordVisitorI().

◆ ~PythiaBaseHadro2019()

PythiaBaseHadro2019::~PythiaBaseHadro2019 ( )

protectedvirtual

Definition at line 50 of file PythiaBaseHadro2019.cxx.

{
 
}

Member Function Documentation

◆ AssertValidity()

bool PythiaBaseHadro2019::AssertValidity ( const Interaction * in ) const

protectedvirtual

Definition at line 276 of file PythiaBaseHadro2019.cxx.

                                                                              {
 
  // check that there is no charm production
  // (GENIE uses a special model for these cases)
  if(interaction->ExclTag().IsCharmEvent()) {
    LOG("PythiaHad", pWARN) << "Can't hadronize charm events";
    return false;
  }
  // check the available mass
  double W = utils::kinematics::W(interaction);
  double Wmin = kNucleonMass+kPionMass;
  if(W < Wmin) {
    LOG("PythiaHad", pWARN) << "Low invariant mass, W = "
                                << W << " GeV!!";
    return false;
  }
 
  const InitialState & init_state = interaction->InitState();
  const ProcessInfo &  proc_info  = interaction->ProcInfo();
  const Target &       target     = init_state.Tgt();
 
  if( ! target.HitQrkIsSet() ) {
    LOG("PythiaHad", pWARN) << "Hit quark was not set!";
    return false;
  }
 
  int  probe       = init_state.ProbePdg();
  int  hit_nucleon = target.HitNucPdg();
  int  hit_quark   = target.HitQrkPdg();
  //bool from_sea    = target.HitSeaQrk();
 
  // check hit-nucleon assignment, input neutrino & weak current
  bool isp  = pdg::IsProton           (hit_nucleon);
  bool isn  = pdg::IsNeutron          (hit_nucleon);
  bool isv  = pdg::IsNeutrino         (probe);
  bool isvb = pdg::IsAntiNeutrino     (probe);
  bool isdm = pdg::IsDarkMatter         (probe);
  bool isl  = pdg::IsNegChargedLepton (probe);
  bool islb = pdg::IsPosChargedLepton (probe);
  bool iscc = proc_info.IsWeakCC      ();
  bool isnc = proc_info.IsWeakNC      ();
  bool isdmi = proc_info.IsDarkMatter  ();
  bool isem = proc_info.IsEM          ();
  if( !(iscc||isnc||isem||isdmi) ) {
    LOG("PythiaHad", pWARN)
      << "Can only handle electro-weak interactions";
    return false;
  }
  if( !(isp||isn) || !(isv||isvb||isl||islb||isdm) ) {
    LOG("PythiaHad", pWARN)
      << "Invalid initial state: probe = "
      << probe << ", hit_nucleon = " << hit_nucleon;
    return false;
  }
 
  // assert that the interaction mode is allowed
  bool isu  = pdg::IsUQuark     (hit_quark);
  bool isd  = pdg::IsDQuark     (hit_quark);
  bool iss  = pdg::IsSQuark     (hit_quark);
  bool isub = pdg::IsAntiUQuark (hit_quark);
  bool isdb = pdg::IsAntiDQuark (hit_quark);
  bool issb = pdg::IsAntiSQuark (hit_quark);
 
  bool allowed = (iscc && isv  && (isd||isub||iss))  ||
    (iscc && isvb && (isu||isdb||issb)) ||
    (isnc && (isv||isvb) && (isu||isd||isub||isdb||iss||issb)) ||
    (isdmi && isdm && (isu||isd||isub||isdb||iss||issb)) ||
    (isem && (isl||islb) && (isu||isd||isub||isdb||iss||issb));
  if(!allowed) {
    LOG("PythiaHad", pWARN)
      << "Impossible interaction type / probe / hit quark combination!";
    return false;
  }
 
  return true;
}

References genie::Interaction::ExclTag(), genie::Target::HitNucPdg(), genie::Target::HitQrkIsSet(), genie::Target::HitQrkPdg(), genie::Interaction::InitState(), genie::pdg::IsAntiDQuark(), genie::pdg::IsAntiNeutrino(), genie::pdg::IsAntiSQuark(), genie::pdg::IsAntiUQuark(), genie::XclsTag::IsCharmEvent(), genie::pdg::IsDarkMatter(), genie::ProcessInfo::IsDarkMatter(), genie::pdg::IsDQuark(), genie::ProcessInfo::IsEM(), genie::pdg::IsNegChargedLepton(), genie::pdg::IsNeutrino(), genie::pdg::IsNeutron(), genie::pdg::IsPosChargedLepton(), genie::pdg::IsProton(), genie::pdg::IsSQuark(), genie::pdg::IsUQuark(), genie::ProcessInfo::IsWeakCC(), genie::ProcessInfo::IsWeakNC(), genie::constants::kNucleonMass, genie::constants::kPionMass, LOG, genie::InitialState::ProbePdg(), genie::Interaction::ProcInfo(), pWARN, genie::InitialState::Tgt(), and genie::utils::kinematics::W().

Referenced by ProcessEventRecord().

◆ CopyOriginalDecayFlags()

virtual void genie::PythiaBaseHadro2019::CopyOriginalDecayFlags ( void ) const

protectedpure virtual

Implemented in genie::Pythia6Hadro2019, and genie::Pythia8Hadro2019.

Referenced by ProcessEventRecord().

◆ Hadronize()

virtual bool genie::PythiaBaseHadro2019::Hadronize ( GHepRecord * event ) const

protectedpure virtual

Implemented in genie::Pythia6Hadro2019, and genie::Pythia8Hadro2019.

Referenced by ProcessEventRecord().

◆ Initialize()

void PythiaBaseHadro2019::Initialize ( void )

protectedvirtual

Reimplemented in genie::Pythia6Hadro2019, and genie::Pythia8Hadro2019.

Definition at line 353 of file PythiaBaseHadro2019.cxx.

{
  fLeadingQuark           = 0;
  fRemnantDiquark         = 0;
  fSSBarSuppression       = 0.;
  fGaussianPt2            = 0.;
  fNonGaussianPt2Tail     = 0.;
  fRemainingECutoff       = 0.;
  fDiQuarkSuppression     = 0.;
  fLightVMesonSuppression = 0.;
  fSVMesonSuppression     = 0.;
  fLunda                  = 0.;
  fLundb                  = 0.;
  fLundaDiq               = 0.;
  fOriDecayFlag_pi0       = false;
  fOriDecayFlag_K0        = false;
  fOriDecayFlag_K0b       = false;
  fOriDecayFlag_L0        = false;
  fOriDecayFlag_L0b       = false;
  fOriDecayFlag_Dm        = false;
  fOriDecayFlag_D0        = false;
  fOriDecayFlag_Dp        = false;
  fOriDecayFlag_Dpp       = false;
  fReqDecayFlag_pi0       = false;
  fReqDecayFlag_K0        = false;
  fReqDecayFlag_K0b       = false;
  fReqDecayFlag_L0        = false;
  fReqDecayFlag_L0b       = false;
  fReqDecayFlag_Dm        = false;
  fReqDecayFlag_D0        = false;
  fReqDecayFlag_Dp        = false;
  fReqDecayFlag_Dpp       = false;
}

References fDiQuarkSuppression, fGaussianPt2, fLeadingQuark, fLightVMesonSuppression, fLunda, fLundaDiq, fLundb, fNonGaussianPt2Tail, fOriDecayFlag_D0, fOriDecayFlag_Dm, fOriDecayFlag_Dp, fOriDecayFlag_Dpp, fOriDecayFlag_K0, fOriDecayFlag_K0b, fOriDecayFlag_L0, fOriDecayFlag_L0b, fOriDecayFlag_pi0, fRemainingECutoff, fRemnantDiquark, fReqDecayFlag_D0, fReqDecayFlag_Dm, fReqDecayFlag_Dp, fReqDecayFlag_Dpp, fReqDecayFlag_K0, fReqDecayFlag_K0b, fReqDecayFlag_L0, fReqDecayFlag_L0b, fReqDecayFlag_pi0, fSSBarSuppression, and fSVMesonSuppression.

Referenced by genie::Pythia6Hadro2019::Initialize().

◆ LoadConfig()

void PythiaBaseHadro2019::LoadConfig ( void )

protectedvirtual

Reimplemented in genie::Pythia6Hadro2019, and genie::Pythia8Hadro2019.

Definition at line 387 of file PythiaBaseHadro2019.cxx.

{
  // Get PYTHIA physics configuration parameters specified by GENIE
  this->GetParam( "PYTHIA-SSBarSuppression",       fSSBarSuppression       );
  this->GetParam( "PYTHIA-GaussianPt2",            fGaussianPt2            );
  this->GetParam( "PYTHIA-NonGaussianPt2Tail",     fNonGaussianPt2Tail     );
  this->GetParam( "PYTHIA-RemainingEnergyCutoff",  fRemainingECutoff       );
  this->GetParam( "PYTHIA-DiQuarkSuppression",     fDiQuarkSuppression     );
  this->GetParam( "PYTHIA-LightVMesonSuppression", fLightVMesonSuppression );
  this->GetParam( "PYTHIA-SVMesonSuppression",     fSVMesonSuppression     );
  this->GetParam( "PYTHIA-Lunda",                  fLunda                  );
  this->GetParam( "PYTHIA-Lundb",                  fLundb                  );
  this->GetParam( "PYTHIA-LundaDiq",               fLundaDiq               );
 
  // Set required PYTHIA decay flags
  fReqDecayFlag_pi0       = false; // don't decay pi0
  fReqDecayFlag_K0        = false; // don't decay K0
  fReqDecayFlag_K0b       = false; // don't decay \bar{K0}
  fReqDecayFlag_L0        = false; // don't decay Lambda0
  fReqDecayFlag_L0b       = false; // don't decay \bar{Lambda0}
  fReqDecayFlag_Dm        = true;  // decay Delta-
  fReqDecayFlag_D0        = true;  // decay Delta0
  fReqDecayFlag_Dp        = true;  // decay Delta+
  fReqDecayFlag_Dpp       = true;  // decay Delta++
 
  // Load Wcut determining the phase space area where the multiplicity prob.
  // scaling factors would be applied -if requested-
  double Wcut, Wmin ;
  this->GetParam( "Wcut",            Wcut );
  this->GetParam( "KNO2PYTHIA-Wmin", Wmin );
 
  if ( Wcut > Wmin ) {
    LOG("PythiaHad", pERROR)
       << "Wcut value too high and in conflict with the KNO2PYTHIA-Wmin!"
       << "\n  Wcut = " << Wcut
       << "\n  KNO2PYTHIA-Wmin = " << Wmin;
  }
}

References fDiQuarkSuppression, fGaussianPt2, fLightVMesonSuppression, fLunda, fLundaDiq, fLundb, fNonGaussianPt2Tail, fRemainingECutoff, fReqDecayFlag_D0, fReqDecayFlag_Dm, fReqDecayFlag_Dp, fReqDecayFlag_Dpp, fReqDecayFlag_K0, fReqDecayFlag_K0b, fReqDecayFlag_L0, fReqDecayFlag_L0b, fReqDecayFlag_pi0, fSSBarSuppression, fSVMesonSuppression, genie::Algorithm::GetParam(), LOG, and pERROR.

Referenced by genie::Pythia6Hadro2019::LoadConfig(), and genie::Pythia8Hadro2019::LoadConfig().

◆ MakeQuarkDiquarkAssignments()

void PythiaBaseHadro2019::MakeQuarkDiquarkAssignments ( const Interaction * in ) const

protectedvirtual

Definition at line 94 of file PythiaBaseHadro2019.cxx.

{
  LOG("PythiaHad", pNOTICE)
    << "Making leading quark / remnant di-quark assignments";
 
  // get kinematics / init-state / process-info
 
  const Kinematics &   kinematics = interaction->Kine();
  const InitialState & init_state = interaction->InitState();
  const ProcessInfo &  proc_info  = interaction->ProcInfo();
  const Target &       target     = init_state.Tgt();
 
  assert(target.HitQrkIsSet());
 
  double W = kinematics.W();
 
  int  probe       = init_state.ProbePdg();
  int  hit_nucleon = target.HitNucPdg();
  int  hit_quark   = target.HitQrkPdg();
  bool from_sea    = target.HitSeaQrk();
 
  LOG("PythiaHad", pNOTICE)
    << "Hit nucleon pdgc = " << hit_nucleon << ", W = " << W;
  LOG("PythiaHad", pNOTICE)
    << "Selected hit quark pdgc = " << hit_quark
    << ((from_sea) ? "[sea]" : "[valence]");
 
  // check hit-nucleon assignment, input neutrino & interaction type
  bool isp  = pdg::IsProton           (hit_nucleon);
  bool isn  = pdg::IsNeutron          (hit_nucleon);
  bool isv  = pdg::IsNeutrino         (probe);
  bool isvb = pdg::IsAntiNeutrino     (probe);
//bool isl  = pdg::IsNegChargedLepton (probe);
//bool islb = pdg::IsPosChargedLepton (probe);
  bool iscc = proc_info.IsWeakCC      ();
  bool isnc = proc_info.IsWeakNC      ();
  bool isdm = proc_info.IsDarkMatter  ();
  bool isem = proc_info.IsEM          ();
  bool isu  = pdg::IsUQuark           (hit_quark);
  bool isd  = pdg::IsDQuark           (hit_quark);
  bool iss  = pdg::IsSQuark           (hit_quark);
  bool isub = pdg::IsAntiUQuark       (hit_quark);
  bool isdb = pdg::IsAntiDQuark       (hit_quark);
  bool issb = pdg::IsAntiSQuark       (hit_quark);
 
  //
  // Generate the quark system (q + qq) initiating the hadronization
  //
 
  int  leading_quark   = 0; // leading quark (hit quark after the interaction)
  int  remnant_diquark = 0; // remnant diquark (xF<0 at hadronic CMS)
 
  // Figure out the what happens to the hit quark after the interaction
  if (isnc || isem || isdm) {
    // NC, EM
    leading_quark = hit_quark;
  } else {
    // CC
    if      (isv  && isd ) leading_quark = kPdgUQuark;
    else if (isv  && iss ) leading_quark = kPdgUQuark;
    else if (isv  && isub) leading_quark = kPdgAntiDQuark;
    else if (isvb && isu ) leading_quark = kPdgDQuark;
    else if (isvb && isdb) leading_quark = kPdgAntiUQuark;
    else if (isvb && issb) leading_quark = kPdgAntiUQuark;
    else {
      LOG("PythiaHad", pERROR)
        << "Not allowed mode. Refused to make a leading quark assignment!";
      return;
    }
  }//CC
 
  // Figure out what the remnant diquark is.
  // Note from Hugh, following a conversation with his local HEP theorist
  // (Gary Goldstein): "I am told that the probability of finding the diquark
  // in the singlet vs. triplet states is 50-50."
 
  // hit quark = valence quark
  if(!from_sea) {
    if (isp && isu) remnant_diquark = kPdgUDDiquarkS1; /* u(->q) + ud */
    if (isp && isd) remnant_diquark = kPdgUUDiquarkS1; /* d(->q) + uu */
    if (isn && isu) remnant_diquark = kPdgDDDiquarkS1; /* u(->q) + dd */
    if (isn && isd) remnant_diquark = kPdgUDDiquarkS1; /* d(->q) + ud */
  }
  // hit quark = sea quark
  else {
    if(isp && isu) remnant_diquark = kPdgUDDiquarkS1; /* u(->q) + bar{u} uud (=ud) */
    if(isp && isd) remnant_diquark = kPdgUUDiquarkS1; /* d(->q) + bar{d} uud (=uu) */
    if(isn && isu) remnant_diquark = kPdgDDDiquarkS1; /* u(->q) + bar{u} udd (=dd) */
    if(isn && isd) remnant_diquark = kPdgUDDiquarkS1; /* d(->q) + bar{d} udd (=ud) */
 
    // The following section needs revisiting.
 
    // The lepton is scattered off a sea antiquark, materializing its quark
    // partner and leaving me with a 5q system ( <qbar + q> + qqq(valence) )
    // I will force few qbar+q annhilations below to get my quark/diquark system
    // Probably it is best to leave the qqq system in the final state and then
    // just do the fragmentation of the qbar q system? But how do I figure out
    // how to split the available energy?
 
    /* bar{u} (-> bar{d}) + u uud => u + uu */
    if(isp && isub && iscc) {
      leading_quark   = kPdgUQuark;
      remnant_diquark = kPdgUUDiquarkS1;
    }
    /* bar{u} (-> bar{u}) + u uud => u + ud */
    if(isp && isub && (isnc||isem||isdm)) {
      leading_quark   = kPdgUQuark;
      remnant_diquark = kPdgUDDiquarkS1;
    }
    /* bar{d} (-> bar{u}) + d uud => d + ud */
    if(isp && isdb && iscc) {
      leading_quark   = kPdgDQuark;
      remnant_diquark = kPdgUDDiquarkS1;
    }
    /* bar{d} (-> bar{d}) + d uud => d + uu */
    if(isp && isdb && (isnc||isem||isdm)) {
      leading_quark   = kPdgDQuark;
      remnant_diquark = kPdgUUDiquarkS1;
    }
    /* bar{u} (-> bar{d}) + u udd => u + ud */
    if(isn && isub && iscc) {
      leading_quark   = kPdgUQuark;
      remnant_diquark = kPdgUDDiquarkS1;
    }
    /* bar{u} (-> bar{u}) + u udd => u + dd */
    if(isn && isub && (isnc||isem||isdm)) {
      leading_quark   = kPdgUQuark;
      remnant_diquark = kPdgDDDiquarkS1;
    }
    /* bar{d} (-> bar{u}) + d udd => d + dd */
    if(isn && isdb && iscc) {
      leading_quark   = kPdgDQuark;
      remnant_diquark = kPdgDDDiquarkS1;
    }
    /* bar{d} (-> bar{d}) + d udd => d + ud */
    if(isn && isdb && (isnc||isem||isdm)) {
      leading_quark   = kPdgDQuark;
      remnant_diquark = kPdgUDDiquarkS1;
    }
 
    // The neutrino is scatterred off s or sbar sea quarks
    // For the time being I will handle s like d and sbar like dbar (copy & paste
    // from above) so that I conserve charge.
 
    if(iss || issb) {
       LOG("PythiaHad", pNOTICE)
         << "Can not really handle a hit s or sbar quark / Faking it";
 
       if(isp && iss) { remnant_diquark = kPdgUUDiquarkS1; }
       if(isn && iss) { remnant_diquark = kPdgUDDiquarkS1; }
 
       if(isp && issb && iscc) {
         leading_quark   = kPdgDQuark;
         remnant_diquark = kPdgUDDiquarkS1;
       }
       if(isp && issb && (isnc||isem||isdm)) {
         leading_quark   = kPdgDQuark;
         remnant_diquark = kPdgUUDiquarkS1;
       }
       if(isn && issb && iscc) {
         leading_quark   = kPdgDQuark;
         remnant_diquark = kPdgDDDiquarkS1;
       }
       if(isn && issb && (isnc||isem||isdm)) {
         leading_quark   = kPdgDQuark;
         remnant_diquark = kPdgUDDiquarkS1;
       }
    }
 
    // if the diquark is a ud, switch it to the singlet state with 50% probability
    if(remnant_diquark == kPdgUDDiquarkS1) {
      RandomGen * rnd = RandomGen::Instance();
      double Rqq = rnd->RndHadro().Rndm();
      if(Rqq<0.5) remnant_diquark = kPdgUDDiquarkS0;
    }
  }
 
  fLeadingQuark   = leading_quark;
  fRemnantDiquark = remnant_diquark;
}

References fLeadingQuark, fRemnantDiquark, genie::Target::HitNucPdg(), genie::Target::HitQrkIsSet(), genie::Target::HitQrkPdg(), genie::Target::HitSeaQrk(), genie::Interaction::InitState(), genie::RandomGen::Instance(), genie::pdg::IsAntiDQuark(), genie::pdg::IsAntiNeutrino(), genie::pdg::IsAntiSQuark(), genie::pdg::IsAntiUQuark(), genie::ProcessInfo::IsDarkMatter(), genie::pdg::IsDQuark(), genie::ProcessInfo::IsEM(), genie::pdg::IsNeutrino(), genie::pdg::IsNeutron(), genie::pdg::IsProton(), genie::pdg::IsSQuark(), genie::pdg::IsUQuark(), genie::ProcessInfo::IsWeakCC(), genie::ProcessInfo::IsWeakNC(), genie::Interaction::Kine(), genie::kPdgAntiDQuark, genie::kPdgAntiUQuark, genie::kPdgDDDiquarkS1, genie::kPdgDQuark, genie::kPdgUDDiquarkS0, genie::kPdgUDDiquarkS1, genie::kPdgUQuark, genie::kPdgUUDiquarkS1, LOG, pERROR, pNOTICE, genie::InitialState::ProbePdg(), genie::Interaction::ProcInfo(), genie::RandomGen::RndHadro(), genie::InitialState::Tgt(), and genie::Kinematics::W().

Referenced by ProcessEventRecord().

◆ ProcessEventRecord()

void PythiaBaseHadro2019::ProcessEventRecord ( GHepRecord * event ) const

protectedvirtual

Implements genie::EventRecordVisitorI.

Reimplemented in genie::Pythia6Hadro2019, and genie::Pythia8Hadro2019.

Definition at line 55 of file PythiaBaseHadro2019.cxx.

{
  Interaction * interaction = event->Summary();
 
  bool valid_process = this->AssertValidity(interaction);
  if(!valid_process) {
     LOG("PythiaHad", pFATAL)
       << "Input interaction type is not allowed!!!";
     LOG("PythiaHad", pFATAL)
       << *event;
     gAbortingInErr = true;
    std::exit(1);
  }
 
  // Decide the leading quark and remnant diquark PDG codes for this event
  this->MakeQuarkDiquarkAssignments(interaction);
 
  // Copy original and set required PYTHIA decay flags
  this->CopyOriginalDecayFlags();
  this->SetDesiredDecayFlags();
 
  // Call PYTHIA6 or PYTHIA8 to obtain the fragmentation products
  //TClonesArray * particle_list = this->Hadronize(interaction);
  bool hadronized = this->Hadronize(event);
 
  // Restore decay flags
  this->RestoreOriginalDecayFlags();
 
  if(!hadronized) {
    LOG("PythiaHad", pWARN) << "Hadronization failed!";
    event->EventFlags()->SetBitNumber(kHadroSysGenErr, true);
    genie::exceptions::EVGThreadException exception;
    exception.SetReason("Could not simulate the hadronic system");
    exception.SwitchOnFastForward();
    throw exception;
    return;
   }
}

References AssertValidity(), CopyOriginalDecayFlags(), genie::gAbortingInErr, Hadronize(), genie::kHadroSysGenErr, LOG, MakeQuarkDiquarkAssignments(), pFATAL, pWARN, RestoreOriginalDecayFlags(), SetDesiredDecayFlags(), genie::exceptions::EVGThreadException::SetReason(), and genie::exceptions::EVGThreadException::SwitchOnFastForward().

Referenced by genie::Pythia6Hadro2019::ProcessEventRecord(), and genie::Pythia8Hadro2019::ProcessEventRecord().

◆ RestoreOriginalDecayFlags()

virtual void genie::PythiaBaseHadro2019::RestoreOriginalDecayFlags ( void ) const

protectedpure virtual

Implemented in genie::Pythia6Hadro2019, and genie::Pythia8Hadro2019.

Referenced by ProcessEventRecord().

◆ SetDesiredDecayFlags()

virtual void genie::PythiaBaseHadro2019::SetDesiredDecayFlags ( void ) const

protectedpure virtual

Implemented in genie::Pythia6Hadro2019, and genie::Pythia8Hadro2019.

Referenced by ProcessEventRecord().

Member Data Documentation

◆ fDiQuarkSuppression

double genie::PythiaBaseHadro2019::fDiQuarkSuppression

protected

di-quark suppression parameter

Definition at line 59 of file PythiaBaseHadro2019.h.

Referenced by Initialize(), genie::Pythia6Hadro2019::LoadConfig(), genie::Pythia8Hadro2019::LoadConfig(), and LoadConfig().

◆ fGaussianPt2

double genie::PythiaBaseHadro2019::fGaussianPt2

protected

gaussian pt2 distribution width

Definition at line 56 of file PythiaBaseHadro2019.h.

Referenced by Initialize(), genie::Pythia6Hadro2019::LoadConfig(), genie::Pythia8Hadro2019::LoadConfig(), and LoadConfig().

◆ fLeadingQuark

int genie::PythiaBaseHadro2019::fLeadingQuark

mutableprotected

Definition at line 51 of file PythiaBaseHadro2019.h.

Referenced by genie::Pythia6Hadro2019::Hadronize(), genie::Pythia8Hadro2019::Hadronize(), Initialize(), and MakeQuarkDiquarkAssignments().

◆ fLightVMesonSuppression

double genie::PythiaBaseHadro2019::fLightVMesonSuppression

protected

light vector meson suppression

Definition at line 60 of file PythiaBaseHadro2019.h.

Referenced by Initialize(), genie::Pythia6Hadro2019::LoadConfig(), genie::Pythia8Hadro2019::LoadConfig(), and LoadConfig().

◆ fLunda

double genie::PythiaBaseHadro2019::fLunda

protected

Lund a parameter.

Definition at line 62 of file PythiaBaseHadro2019.h.

Referenced by Initialize(), genie::Pythia6Hadro2019::LoadConfig(), genie::Pythia8Hadro2019::LoadConfig(), and LoadConfig().

◆ fLundaDiq

double genie::PythiaBaseHadro2019::fLundaDiq

protected

adjustment of Lund a for di-quark

Definition at line 64 of file PythiaBaseHadro2019.h.

Referenced by Initialize(), genie::Pythia6Hadro2019::LoadConfig(), genie::Pythia8Hadro2019::LoadConfig(), and LoadConfig().

◆ fLundb

double genie::PythiaBaseHadro2019::fLundb

protected

Lund b parameter.

Definition at line 63 of file PythiaBaseHadro2019.h.

Referenced by Initialize(), genie::Pythia6Hadro2019::LoadConfig(), genie::Pythia8Hadro2019::LoadConfig(), and LoadConfig().

◆ fNonGaussianPt2Tail

double genie::PythiaBaseHadro2019::fNonGaussianPt2Tail

protected

non gaussian pt2 tail parameterization

Definition at line 57 of file PythiaBaseHadro2019.h.

Referenced by Initialize(), genie::Pythia6Hadro2019::LoadConfig(), genie::Pythia8Hadro2019::LoadConfig(), and LoadConfig().

◆ fOriDecayFlag_D0

bool genie::PythiaBaseHadro2019::fOriDecayFlag_D0

mutableprotected

Definition at line 73 of file PythiaBaseHadro2019.h.

Referenced by genie::Pythia6Hadro2019::CopyOriginalDecayFlags(), genie::Pythia8Hadro2019::CopyOriginalDecayFlags(), Initialize(), genie::Pythia6Hadro2019::RestoreOriginalDecayFlags(), and genie::Pythia8Hadro2019::RestoreOriginalDecayFlags().

◆ fOriDecayFlag_Dm

bool genie::PythiaBaseHadro2019::fOriDecayFlag_Dm

mutableprotected

Definition at line 72 of file PythiaBaseHadro2019.h.

Referenced by genie::Pythia6Hadro2019::CopyOriginalDecayFlags(), genie::Pythia8Hadro2019::CopyOriginalDecayFlags(), Initialize(), genie::Pythia6Hadro2019::RestoreOriginalDecayFlags(), and genie::Pythia8Hadro2019::RestoreOriginalDecayFlags().

◆ fOriDecayFlag_Dp

bool genie::PythiaBaseHadro2019::fOriDecayFlag_Dp

mutableprotected

Definition at line 74 of file PythiaBaseHadro2019.h.

Referenced by genie::Pythia6Hadro2019::CopyOriginalDecayFlags(), genie::Pythia8Hadro2019::CopyOriginalDecayFlags(), Initialize(), genie::Pythia6Hadro2019::RestoreOriginalDecayFlags(), and genie::Pythia8Hadro2019::RestoreOriginalDecayFlags().

◆ fOriDecayFlag_Dpp

bool genie::PythiaBaseHadro2019::fOriDecayFlag_Dpp

mutableprotected

Definition at line 75 of file PythiaBaseHadro2019.h.

Referenced by genie::Pythia6Hadro2019::CopyOriginalDecayFlags(), genie::Pythia8Hadro2019::CopyOriginalDecayFlags(), Initialize(), genie::Pythia6Hadro2019::RestoreOriginalDecayFlags(), and genie::Pythia8Hadro2019::RestoreOriginalDecayFlags().

◆ fOriDecayFlag_K0

bool genie::PythiaBaseHadro2019::fOriDecayFlag_K0

mutableprotected

Definition at line 68 of file PythiaBaseHadro2019.h.

Referenced by genie::Pythia6Hadro2019::CopyOriginalDecayFlags(), genie::Pythia8Hadro2019::CopyOriginalDecayFlags(), Initialize(), genie::Pythia6Hadro2019::RestoreOriginalDecayFlags(), and genie::Pythia8Hadro2019::RestoreOriginalDecayFlags().

◆ fOriDecayFlag_K0b

bool genie::PythiaBaseHadro2019::fOriDecayFlag_K0b

mutableprotected

Definition at line 69 of file PythiaBaseHadro2019.h.

Referenced by genie::Pythia6Hadro2019::CopyOriginalDecayFlags(), genie::Pythia8Hadro2019::CopyOriginalDecayFlags(), Initialize(), genie::Pythia6Hadro2019::RestoreOriginalDecayFlags(), and genie::Pythia8Hadro2019::RestoreOriginalDecayFlags().

◆ fOriDecayFlag_L0

bool genie::PythiaBaseHadro2019::fOriDecayFlag_L0

mutableprotected

Definition at line 70 of file PythiaBaseHadro2019.h.

Referenced by genie::Pythia6Hadro2019::CopyOriginalDecayFlags(), genie::Pythia8Hadro2019::CopyOriginalDecayFlags(), Initialize(), genie::Pythia6Hadro2019::RestoreOriginalDecayFlags(), and genie::Pythia8Hadro2019::RestoreOriginalDecayFlags().

◆ fOriDecayFlag_L0b

bool genie::PythiaBaseHadro2019::fOriDecayFlag_L0b

mutableprotected

Definition at line 71 of file PythiaBaseHadro2019.h.

Referenced by genie::Pythia6Hadro2019::CopyOriginalDecayFlags(), genie::Pythia8Hadro2019::CopyOriginalDecayFlags(), Initialize(), genie::Pythia6Hadro2019::RestoreOriginalDecayFlags(), and genie::Pythia8Hadro2019::RestoreOriginalDecayFlags().

◆ fOriDecayFlag_pi0

bool genie::PythiaBaseHadro2019::fOriDecayFlag_pi0

mutableprotected

Definition at line 67 of file PythiaBaseHadro2019.h.

Referenced by genie::Pythia6Hadro2019::CopyOriginalDecayFlags(), genie::Pythia8Hadro2019::CopyOriginalDecayFlags(), Initialize(), genie::Pythia6Hadro2019::RestoreOriginalDecayFlags(), and genie::Pythia8Hadro2019::RestoreOriginalDecayFlags().

◆ fRemainingECutoff

double genie::PythiaBaseHadro2019::fRemainingECutoff

protected

remaining E cutoff stopping fragmentation

Definition at line 58 of file PythiaBaseHadro2019.h.

Referenced by Initialize(), genie::Pythia6Hadro2019::LoadConfig(), genie::Pythia8Hadro2019::LoadConfig(), and LoadConfig().

◆ fRemnantDiquark

int genie::PythiaBaseHadro2019::fRemnantDiquark

mutableprotected

Definition at line 52 of file PythiaBaseHadro2019.h.

Referenced by genie::Pythia6Hadro2019::Hadronize(), genie::Pythia8Hadro2019::Hadronize(), Initialize(), and MakeQuarkDiquarkAssignments().

◆ fReqDecayFlag_D0

bool genie::PythiaBaseHadro2019::fReqDecayFlag_D0

protected

Definition at line 83 of file PythiaBaseHadro2019.h.

Referenced by Initialize(), LoadConfig(), genie::Pythia6Hadro2019::SetDesiredDecayFlags(), and genie::Pythia8Hadro2019::SetDesiredDecayFlags().

◆ fReqDecayFlag_Dm

bool genie::PythiaBaseHadro2019::fReqDecayFlag_Dm

protected

Definition at line 82 of file PythiaBaseHadro2019.h.

Referenced by Initialize(), LoadConfig(), genie::Pythia6Hadro2019::SetDesiredDecayFlags(), and genie::Pythia8Hadro2019::SetDesiredDecayFlags().

◆ fReqDecayFlag_Dp

bool genie::PythiaBaseHadro2019::fReqDecayFlag_Dp

protected

Definition at line 84 of file PythiaBaseHadro2019.h.

Referenced by Initialize(), LoadConfig(), genie::Pythia6Hadro2019::SetDesiredDecayFlags(), and genie::Pythia8Hadro2019::SetDesiredDecayFlags().

◆ fReqDecayFlag_Dpp

bool genie::PythiaBaseHadro2019::fReqDecayFlag_Dpp

protected

Definition at line 85 of file PythiaBaseHadro2019.h.

Referenced by Initialize(), LoadConfig(), genie::Pythia6Hadro2019::SetDesiredDecayFlags(), and genie::Pythia8Hadro2019::SetDesiredDecayFlags().

◆ fReqDecayFlag_K0

bool genie::PythiaBaseHadro2019::fReqDecayFlag_K0

protected

Definition at line 78 of file PythiaBaseHadro2019.h.

Referenced by Initialize(), LoadConfig(), genie::Pythia6Hadro2019::SetDesiredDecayFlags(), and genie::Pythia8Hadro2019::SetDesiredDecayFlags().

◆ fReqDecayFlag_K0b

bool genie::PythiaBaseHadro2019::fReqDecayFlag_K0b

protected

Definition at line 79 of file PythiaBaseHadro2019.h.

Referenced by Initialize(), LoadConfig(), genie::Pythia6Hadro2019::SetDesiredDecayFlags(), and genie::Pythia8Hadro2019::SetDesiredDecayFlags().

◆ fReqDecayFlag_L0

bool genie::PythiaBaseHadro2019::fReqDecayFlag_L0

protected

Definition at line 80 of file PythiaBaseHadro2019.h.

Referenced by Initialize(), LoadConfig(), genie::Pythia6Hadro2019::SetDesiredDecayFlags(), and genie::Pythia8Hadro2019::SetDesiredDecayFlags().

◆ fReqDecayFlag_L0b

bool genie::PythiaBaseHadro2019::fReqDecayFlag_L0b

protected

Definition at line 81 of file PythiaBaseHadro2019.h.

Referenced by Initialize(), LoadConfig(), genie::Pythia6Hadro2019::SetDesiredDecayFlags(), and genie::Pythia8Hadro2019::SetDesiredDecayFlags().

◆ fReqDecayFlag_pi0

bool genie::PythiaBaseHadro2019::fReqDecayFlag_pi0

protected

Definition at line 77 of file PythiaBaseHadro2019.h.

Referenced by Initialize(), LoadConfig(), genie::Pythia6Hadro2019::SetDesiredDecayFlags(), and genie::Pythia8Hadro2019::SetDesiredDecayFlags().

◆ fSSBarSuppression

double genie::PythiaBaseHadro2019::fSSBarSuppression

protected

ssbar suppression

Definition at line 55 of file PythiaBaseHadro2019.h.

Referenced by Initialize(), genie::Pythia6Hadro2019::LoadConfig(), genie::Pythia8Hadro2019::LoadConfig(), and LoadConfig().

◆ fSVMesonSuppression

double genie::PythiaBaseHadro2019::fSVMesonSuppression

protected

strange vector meson suppression

Definition at line 61 of file PythiaBaseHadro2019.h.

Referenced by Initialize(), genie::Pythia6Hadro2019::LoadConfig(), genie::Pythia8Hadro2019::LoadConfig(), and LoadConfig().

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

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ PythiaBaseHadro2019() [1/3]

◆ PythiaBaseHadro2019() [2/3]

◆ PythiaBaseHadro2019() [3/3]

◆ ~PythiaBaseHadro2019()

Member Function Documentation

◆ AssertValidity()

◆ CopyOriginalDecayFlags()

◆ Hadronize()

◆ Initialize()

◆ LoadConfig()

◆ MakeQuarkDiquarkAssignments()

◆ ProcessEventRecord()

◆ RestoreOriginalDecayFlags()

◆ SetDesiredDecayFlags()

Member Data Documentation

◆ fDiQuarkSuppression

◆ fGaussianPt2

◆ fLeadingQuark

◆ fLightVMesonSuppression

◆ fLunda

◆ fLundaDiq

◆ fLundb

◆ fNonGaussianPt2Tail

◆ fOriDecayFlag_D0

◆ fOriDecayFlag_Dm

◆ fOriDecayFlag_Dp

◆ fOriDecayFlag_Dpp

◆ fOriDecayFlag_K0

◆ fOriDecayFlag_K0b

◆ fOriDecayFlag_L0

◆ fOriDecayFlag_L0b

◆ fOriDecayFlag_pi0

◆ fRemainingECutoff

◆ fRemnantDiquark

◆ fReqDecayFlag_D0

◆ fReqDecayFlag_Dm

◆ fReqDecayFlag_Dp

◆ fReqDecayFlag_Dpp

◆ fReqDecayFlag_K0

◆ fReqDecayFlag_K0b

◆ fReqDecayFlag_L0

◆ fReqDecayFlag_L0b

◆ fReqDecayFlag_pi0

◆ fSSBarSuppression

◆ fSVMesonSuppression