Public Member Functions | Private Member Functions | Private Attributes | List of all members
genie::RSPPHadronicSystemGenerator Class Reference

Generates the 'final state' hadronic system in v SPP interactions. It adds the remnant nucleus (if any) and the baryon resonance decay products at the GHEP record. The resonance decay products are pre- determined since in this thread we generate exclusive SPP reactions. The module uses a simple phase space decay. Is a concrete implementation of the EventRecordVisitorI interface. More...

#include <RSPPHadronicSystemGenerator.h>

Inheritance diagram for genie::RSPPHadronicSystemGenerator:
genie::HadronicSystemGenerator genie::EventRecordVisitorI genie::Algorithm

Public Member Functions

 RSPPHadronicSystemGenerator ()
 
 RSPPHadronicSystemGenerator (string config)
 
 ~RSPPHadronicSystemGenerator ()
 
void ProcessEventRecord (GHepRecord *event_rec) const
 
- 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 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. More...
 
virtual AlgStatus_t GetStatus (void) const
 Get algorithm status. More...
 
virtual bool AllowReconfig (void) const
 
virtual AlgCmp_t Compare (const Algorithm *alg) const
 Compare with input algorithm. More...
 
virtual void SetId (const AlgId &id)
 Set algorithm ID. More...
 
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. More...
 

Private Member Functions

void AddResonanceDecayProducts (GHepRecord *event_rec) const
 

Private Attributes

TGenPhaseSpace fPhaseSpaceGenerator
 

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)
 
- 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. More...
 
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. More...
 
int GetParamVectKeys (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 More...
 
int AddLowRegistry (Registry *rp, bool owns=true)
 add registry with lowest priority, also update ownership More...
 
int MergeTopRegistry (const Registry &r)
 
int AddTopRegisties (const vector< Registry * > &rs, bool owns=false)
 Add registries with top priority, also udated Ownerships. More...
 
- 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,...) More...
 
AlgId fID
 algorithm name and configuration set More...
 
vector< Registry * > fConfVect
 
vector< bool > fOwnerships
 ownership for every registry in fConfVect More...
 
AlgStatus_t fStatus
 algorithm execution status More...
 
AlgMap * fOwnedSubAlgMp
 local pool for owned sub-algs (taken out of the factory pool) More...
 

Detailed Description

Generates the 'final state' hadronic system in v SPP interactions. It adds the remnant nucleus (if any) and the baryon resonance decay products at the GHEP record. The resonance decay products are pre- determined since in this thread we generate exclusive SPP reactions. The module uses a simple phase space decay. Is a concrete implementation of the EventRecordVisitorI interface.

Author
Costas Andreopoulos <constantinos.andreopoulos cern.ch> University of Liverpool & STFC Rutherford Appleton Laboratory

November 23, 2004

Copyright (c) 2003-2020, The GENIE Collaboration For the full text of the license visit http://copyright.genie-mc.org

Definition at line 32 of file RSPPHadronicSystemGenerator.h.

Constructor & Destructor Documentation

RSPPHadronicSystemGenerator::RSPPHadronicSystemGenerator ( )

Definition at line 30 of file RSPPHadronicSystemGenerator.cxx.

30  :
31 HadronicSystemGenerator("genie::RSPPHadronicSystemGenerator")
32 {
33 
34 }
RSPPHadronicSystemGenerator::RSPPHadronicSystemGenerator ( string  config)

Definition at line 36 of file RSPPHadronicSystemGenerator.cxx.

36  :
37 HadronicSystemGenerator("genie::RSPPHadronicSystemGenerator", config)
38 {
39 
40 }
config
static Config * config
Definition: config.cpp:1054
RSPPHadronicSystemGenerator::~RSPPHadronicSystemGenerator ( )

Definition at line 42 of file RSPPHadronicSystemGenerator.cxx.

43 {
44 
45 }

Member Function Documentation

void RSPPHadronicSystemGenerator::AddResonanceDecayProducts ( GHepRecord *  event_rec) const
private

Definition at line 55 of file RSPPHadronicSystemGenerator.cxx.

57 {
58 // generate momenta for the baryon resonance decay products and add them at
59 // the event record
60 
61  //-- find out which SPP channel we are generating
62  Interaction * interaction = evrec->Summary();
63  SppChannel_t spp_channel = SppChannel::FromInteraction(interaction);
64 
65  //-- get the final state nucleon and pion
66  int nuc_pdgc = SppChannel::FinStateNucleon (spp_channel);
67  int pi_pdgc = SppChannel::FinStatePion (spp_channel);
68 
69  //-- get the total 4-p for the two-hadron system (= parent resonance 4-p)
70 
71  const InitialState & init_state = interaction->InitState();
72  bool is_nucleus = init_state.Tgt().IsNucleus();
73 
74  //-- access the resonance entry at the GHEP record
75  int res_pos = 0;
76  if(is_nucleus) res_pos = 4;
77  else res_pos = 3;
78 
79  GHepParticle * res = evrec->Particle(res_pos);
80  const TLorentzVector & x4 = *(res->X4());
81 
82  //-- mark the resonance as decayed
83  res->SetStatus(kIStDecayedState);
84 
85  //-- generate 4-p for the two-hadron system
86  double mnuc = PDGLibrary::Instance() -> Find(nuc_pdgc) -> Mass();
87  double mpi = PDGLibrary::Instance() -> Find(pi_pdgc) -> Mass();
88 
89  double mass[2] = { mnuc, mpi };
90 
91  TLorentzVector * p4 = res->GetP4();
92 
93  LOG("RESHadronicVtx", pINFO)
94  << "\n RES 4-P = " << utils::print::P4AsString(p4);
95 
96  bool is_permitted = fPhaseSpaceGenerator.SetDecay(*p4, 2, mass);
97  assert(is_permitted);
98 
99  fPhaseSpaceGenerator.Generate();
100 
101  //-- add the two hadrons at the event record
102  TLorentzVector & p4_nuc = *fPhaseSpaceGenerator.GetDecay(0);
103  TLorentzVector & p4_pi = *fPhaseSpaceGenerator.GetDecay(1);
104  TLorentzVector vdummy(0,0,0,0); // dummy 'vertex'
105 
106  // decide the particle status
107  GHepStatus_t ist = (is_nucleus) ?
108  kIStHadronInTheNucleus : kIStStableFinalState;
109  int mom = res_pos;
110  evrec->AddParticle(nuc_pdgc, ist, mom,-1,-1,-1, p4_nuc, x4);
111  evrec->AddParticle(pi_pdgc, ist, mom,-1,-1,-1, p4_pi, x4);
112  delete p4;
113 }
genie::SppChannel::FromInteraction
static SppChannel_t FromInteraction(const Interaction *interaction)
Definition: SppChannel.h:276
genie::Target::IsNucleus
bool IsNucleus(void) const
Definition: Target.cxx:272
genie::SppChannel::FinStateNucleon
static int FinStateNucleon(SppChannel_t channel)
Definition: SppChannel.h:119
genie::utils::print::P4AsString
string P4AsString(const TLorentzVector *p)
Definition: PrintUtils.cxx:27
genie::utils::res::Mass
double Mass(Resonance_t res)
resonance mass (GeV)
Definition: BaryonResUtils.cxx:436
genie::SppChannel_t
enum genie::ESppChannel SppChannel_t
genie::Interaction
Summary information for an interaction.
Definition: Interaction.h:56
LOG
#define LOG(stream, priority)
A macro that returns the requested log4cpp::Category appending a string (using the FILE...
Definition: Messenger.h:96
genie::GHepParticle::GetP4
TLorentzVector * GetP4(void) const
Definition: GHepParticle.cxx:194
pINFO
#define pINFO
Definition: Messenger.h:62
genie::SppChannel::FinStatePion
static int FinStatePion(SppChannel_t channel)
Definition: SppChannel.h:146
genie::PDGLibrary::Instance
static PDGLibrary * Instance(void)
Definition: PDGLibrary.cxx:57
genie::GHepParticle::X4
const TLorentzVector * X4(void) const
Definition: GHepParticle.h:79
genie::GHepParticle::SetStatus
void SetStatus(GHepStatus_t s)
Definition: GHepParticle.h:126
genie::Interaction::InitState
const InitialState & InitState(void) const
Definition: Interaction.h:69
genie::InitialState::Tgt
const Target & Tgt(void) const
Definition: InitialState.h:66
genie::GHepParticle
STDHEP-like event record entry that can fit a particle or a nucleus.
Definition: GHepParticle.h:39
genie::GHepStatus_t
enum genie::EGHepStatus GHepStatus_t
genie::InitialState
Initial State information.
Definition: InitialState.h:48
void RSPPHadronicSystemGenerator::ProcessEventRecord ( GHepRecord *  event_rec) const
virtual

Implements genie::EventRecordVisitorI.

Definition at line 47 of file RSPPHadronicSystemGenerator.cxx.

48 {
49 // This method generates the final state hadronic system
50 
51  //-- Add the baryon resonance decay products at the event record
52  this->AddResonanceDecayProducts(evrec);
53 }
genie::RSPPHadronicSystemGenerator::AddResonanceDecayProducts
void AddResonanceDecayProducts(GHepRecord *event_rec) const
Definition: RSPPHadronicSystemGenerator.cxx:55

Member Data Documentation

TGenPhaseSpace genie::RSPPHadronicSystemGenerator::fPhaseSpaceGenerator
mutableprivate

Definition at line 45 of file RSPPHadronicSystemGenerator.h.

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