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genie::COHXSec Class Reference

Computes the cross section for COH neutrino-nucleus pi production.
Is a concrete implementation of the XSecIntegratorI interface. More...

#include <COHXSec.h>

Inheritance diagram for genie::COHXSec:
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Public Member Functions

 COHXSec ()
 
 COHXSec (string config)
 
virtual ~COHXSec ()
 
double Integrate (const XSecAlgorithmI *model, const Interaction *i) const
 
void Configure (const Registry &config)
 
void Configure (string config)
 
- Public Member Functions inherited from genie::XSecIntegratorI
virtual ~XSecIntegratorI ()
 
- Public Member Functions inherited from genie::Algorithm
virtual ~Algorithm ()
 
virtual void FindConfig (void)
 
virtual const RegistryGetConfig (void) const
 
RegistryGetOwnedConfig (void)
 
virtual const AlgIdId (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 AlgorithmSubAlg (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 LoadConfig (void)
 

Private Attributes

double fQ2Min
 lower bound of integration for Q^2 in Berger-Sehgal Model More...
 
double fQ2Max
 upper bound of integration for Q^2 in Berger-Sehgal Model More...
 
double fTMax
 upper bound for t = (q - p_pi)^2 More...
 

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::XSecIntegratorI
 XSecIntegratorI ()
 
 XSecIntegratorI (string name)
 
 XSecIntegratorI (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)
 
RegistryExtractLocalConfig (const Registry &in) const
 
RegistryExtractLowerConfig (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
 
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. More...
 
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 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::XSecIntegratorI
const IntegratorI * fIntegrator
 GENIE numerical integrator. More...
 
string fGSLIntgType
 name of GSL numerical integrator More...
 
double fGSLRelTol
 required relative tolerance (error) More...
 
int fGSLMaxEval
 GSL max evaluations. More...
 
int fGSLMinEval
 GSL min evaluations. Ignored by some integrators. More...
 
unsigned int fGSLMaxSizeOfSubintervals
 GSL maximum number of sub-intervals for 1D integrator. More...
 
unsigned int fGSLRule
 GSL Gauss-Kronrod integration rule (only for GSL 1D adaptive type) More...
 
- 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...
 
AlgMapfOwnedSubAlgMp
 local pool for owned sub-algs (taken out of the factory pool) More...
 

Detailed Description

Computes the cross section for COH neutrino-nucleus pi production.
Is a concrete implementation of the XSecIntegratorI interface.

Author
Costas Andreopoulos <c.andreopoulos cern.ch> University of Liverpool
Created:
May 04, 2004
License:
Copyright (c) 2003-2024, The GENIE Collaboration For the full text of the license visit http://copyright.genie-mc.org

Definition at line 26 of file COHXSec.h.

Constructor & Destructor Documentation

COHXSec::COHXSec ( )

Definition at line 34 of file COHXSec.cxx.

34  :
35 XSecIntegratorI("genie::COHXSec")
36 {
37 
38 }
COHXSec::COHXSec ( string  config)

Definition at line 40 of file COHXSec.cxx.

40  :
41 XSecIntegratorI("genie::COHXSec", config)
42 {
43 
44 }
COHXSec::~COHXSec ( )
virtual

Definition at line 46 of file COHXSec.cxx.

47 {
48 
49 }

Member Function Documentation

void COHXSec::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 152 of file COHXSec.cxx.

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

153 {
154  Algorithm::Configure(config);
155  this->LoadConfig();
156 }
void LoadConfig(void)
Definition: COHXSec.cxx:164
virtual void Configure(const Registry &config)
Definition: Algorithm.cxx:62
void COHXSec::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 158 of file COHXSec.cxx.

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

159 {
160  Algorithm::Configure(config);
161  this->LoadConfig();
162 }
void LoadConfig(void)
Definition: COHXSec.cxx:164
virtual void Configure(const Registry &config)
Definition: Algorithm.cxx:62
double COHXSec::Integrate ( const XSecAlgorithmI model,
const Interaction i 
) const
virtual

Implements genie::XSecIntegratorI.

Definition at line 51 of file COHXSec.cxx.

References genie::units::cm2, genie::XSecIntegratorI::fGSLIntgType, genie::XSecIntegratorI::fGSLMaxEval, genie::XSecIntegratorI::fGSLMinEval, genie::XSecIntegratorI::fGSLRelTol, fQ2Max, fTMax, func(), genie::Algorithm::Id(), genie::Interaction::InitState(), genie::utils::gsl::IntegrationNDimTypeFromString(), genie::KPhaseSpace::IsAboveThreshold(), genie::controls::kASmallNum, genie::kISkipProcessChk, genie::kKVx, genie::kKVy, genie::kRfLab, genie::KPhaseSpace::Limits(), LOG, genie::Range1D_t::max, genie::Range1D_t::min, genie::AlgId::Name(), pDEBUG, genie::Interaction::PhaseSpace(), pINFO, genie::InitialState::ProbeE(), and genie::XSecAlgorithmI::ValidProcess().

53 {
54  if(! model->ValidProcess(in) ) return 0.;
55 
56  const KPhaseSpace & kps = in->PhaseSpace();
57  if(!kps.IsAboveThreshold()) {
58  LOG("COHXSec", pDEBUG) << "*** Below energy threshold";
59  return 0;
60  }
61  Range1D_t xl = kps.Limits(kKVx);
62  Range1D_t yl = kps.Limits(kKVy);
63  Range1D_t Q2l;
65  Q2l.max = fQ2Max;
66 
67  Interaction * interaction = new Interaction(*in);
68  interaction->SetBit(kISkipProcessChk);
69  //interaction->SetBit(kISkipKinematicChk);
70 
71  double xsec = 0.0;
72 
73  if (model->Id().Name() == "genie::ReinSehgalCOHPiPXSec") {
74  LOG("COHXSec", pINFO)
75  << "x integration range = [" << xl.min << ", " << xl.max << "]";
76  LOG("COHXSec", pINFO)
77  << "y integration range = [" << yl.min << ", " << yl.max << "]";
78 
79  ROOT::Math::IBaseFunctionMultiDim * func =
80  new utils::gsl::d2XSec_dxdy_E(model, interaction);
81  ROOT::Math::IntegrationMultiDim::Type ig_type =
83 
84  double abstol = 1; //We mostly care about relative tolerance.
85  ROOT::Math::IntegratorMultiDim ig(*func, ig_type, abstol, fGSLRelTol, fGSLMaxEval);
86  if (ig_type == ROOT::Math::IntegrationMultiDim::kADAPTIVE) {
87  ROOT::Math::AdaptiveIntegratorMultiDim * cast =
88  dynamic_cast<ROOT::Math::AdaptiveIntegratorMultiDim*>( ig.GetIntegrator() );
89  assert(cast);
90  cast->SetMinPts(fGSLMinEval);
91  }
92 
93  double kine_min[2] = { xl.min, yl.min };
94  double kine_max[2] = { xl.max, yl.max };
95  xsec = ig.Integral(kine_min, kine_max) * (1E-38 * units::cm2);
96  delete func;
97  }
98  else if (model->Id().Name() == "genie::BergerSehgalCOHPiPXSec2015")
99  {
100  ROOT::Math::IBaseFunctionMultiDim * func =
101  new utils::gsl::d2XSec_dQ2dy_E(model, interaction);
102  ROOT::Math::IntegrationMultiDim::Type ig_type =
104  ROOT::Math::IntegratorMultiDim ig(ig_type);
105  ig.SetRelTolerance(fGSLRelTol);
106  ig.SetFunction(*func);
107  if (ig_type == ROOT::Math::IntegrationMultiDim::kADAPTIVE) {
108  ROOT::Math::AdaptiveIntegratorMultiDim * cast =
109  dynamic_cast<ROOT::Math::AdaptiveIntegratorMultiDim*>( ig.GetIntegrator() );
110  assert(cast);
111  cast->SetMinPts(fGSLMinEval);
112  }
113  double kine_min[2] = { Q2l.min, yl.min };
114  double kine_max[2] = { Q2l.max, yl.max };
115  xsec = ig.Integral(kine_min, kine_max) * (1E-38 * units::cm2);
116  delete func;
117  }
118  else if (model->Id().Name() == "genie::BergerSehgalFMCOHPiPXSec2015")
119  {
120  Range1D_t tl;
122  tl.max = fTMax;
123 
124  ROOT::Math::IBaseFunctionMultiDim * func =
125  new utils::gsl::d2XSec_dQ2dydt_E(model, interaction);
126  ROOT::Math::IntegrationMultiDim::Type ig_type =
128  ROOT::Math::IntegratorMultiDim ig(ig_type);
129  ig.SetRelTolerance(fGSLRelTol);
130  ig.SetFunction(*func);
131  if (ig_type == ROOT::Math::IntegrationMultiDim::kADAPTIVE) {
132  ROOT::Math::AdaptiveIntegratorMultiDim * cast =
133  dynamic_cast<ROOT::Math::AdaptiveIntegratorMultiDim*>( ig.GetIntegrator() );
134  assert(cast);
135  cast->SetMinPts(fGSLMinEval);
136  }
137  double kine_min[3] = { Q2l.min, yl.min, tl.min };
138  double kine_max[3] = { Q2l.max, yl.max, tl.max };
139  xsec = ig.Integral(kine_min, kine_max) * (1E-38 * units::cm2);
140  delete func;
141  }
142 
143  const InitialState & init_state = in->InitState();
144  double Ev = init_state.ProbeE(kRfLab);
145  LOG("COHXSec", pINFO) << "XSec[COH] (E = " << Ev << " GeV) = " << xsec;
146 
147  delete interaction;
148 
149  return xsec;
150 }
string fGSLIntgType
name of GSL numerical integrator
double fQ2Max
upper bound of integration for Q^2 in Berger-Sehgal Model
Definition: COHXSec.h:45
double fTMax
upper bound for t = (q - p_pi)^2
Definition: COHXSec.h:46
ROOT::Math::IntegrationMultiDim::Type IntegrationNDimTypeFromString(string type)
Definition: GSLUtils.cxx:59
A simple [min,max] interval for doubles.
Definition: Range1.h:42
Range1D_t Limits(KineVar_t kvar) const
Return the kinematical variable limits.
Summary information for an interaction.
Definition: Interaction.h:56
#define LOG(stream, priority)
A macro that returns the requested log4cpp::Category appending a string (using the FILE...
Definition: Messenger.h:96
string Name(void) const
Definition: AlgId.h:44
static constexpr double cm2
Definition: Units.h:69
Kinematical phase space.
Definition: KPhaseSpace.h:33
double func(double x, double y)
static const double kASmallNum
Definition: Controls.h:40
#define pINFO
Definition: Messenger.h:62
virtual bool ValidProcess(const Interaction *i) const =0
Can this cross section algorithm handle the input process?
virtual const AlgId & Id(void) const
Get algorithm ID.
Definition: Algorithm.h:98
double max
Definition: Range1.h:53
int fGSLMaxEval
GSL max evaluations.
bool IsAboveThreshold(void) const
Checks whether the interaction is above the energy threshold.
double min
Definition: Range1.h:52
double ProbeE(RefFrame_t rf) const
int fGSLMinEval
GSL min evaluations. Ignored by some integrators.
const UInt_t kISkipProcessChk
if set, skip process validity checks
Definition: Interaction.h:47
Initial State information.
Definition: InitialState.h:48
#define pDEBUG
Definition: Messenger.h:63
double fGSLRelTol
required relative tolerance (error)
void COHXSec::LoadConfig ( void  )
private

Definition at line 164 of file COHXSec.cxx.

References genie::XSecIntegratorI::fGSLIntgType, genie::XSecIntegratorI::fGSLMaxEval, genie::XSecIntegratorI::fGSLMinEval, genie::XSecIntegratorI::fGSLRelTol, fQ2Max, fQ2Min, fTMax, genie::Algorithm::GetParam(), and genie::Algorithm::GetParamDef().

Referenced by Configure().

165 {
166 
167  // Get GSL integration type & relative tolerance
168  GetParamDef( "gsl-integration-type", fGSLIntgType, string("adaptive") ) ;
169  GetParamDef( "gsl-relative-tolerance", fGSLRelTol, 1E-2 ) ;
170 
171  int max_eval, min_eval ;
172  GetParamDef( "gsl-max-eval", max_eval, 500000 ) ;
173  GetParamDef( "gsl-min-eval", min_eval, 5000 ) ;
174 
175  fGSLMaxEval = (unsigned int) max_eval ;
176  fGSLMinEval = (unsigned int) min_eval ;
177 
178  //-- COH model parameter t_max for t = (q - p_pi)^2
179  GetParam("COH-t-max", fTMax ) ;
180 
181  //-- COH model bounds of integration for Q^2
182  GetParam( "COH-Q2-min", fQ2Min ) ;
183  GetParam( "COH-Q2-max", fQ2Max ) ;
184 
185 }
string fGSLIntgType
name of GSL numerical integrator
double fQ2Max
upper bound of integration for Q^2 in Berger-Sehgal Model
Definition: COHXSec.h:45
double fTMax
upper bound for t = (q - p_pi)^2
Definition: COHXSec.h:46
int fGSLMaxEval
GSL max evaluations.
bool GetParamDef(const RgKey &name, T &p, const T &def) const
bool GetParam(const RgKey &name, T &p, bool is_top_call=true) const
double fQ2Min
lower bound of integration for Q^2 in Berger-Sehgal Model
Definition: COHXSec.h:44
int fGSLMinEval
GSL min evaluations. Ignored by some integrators.
double fGSLRelTol
required relative tolerance (error)

Member Data Documentation

double genie::COHXSec::fQ2Max
private

upper bound of integration for Q^2 in Berger-Sehgal Model

Definition at line 45 of file COHXSec.h.

Referenced by Integrate(), and LoadConfig().

double genie::COHXSec::fQ2Min
private

lower bound of integration for Q^2 in Berger-Sehgal Model

Definition at line 44 of file COHXSec.h.

Referenced by LoadConfig().

double genie::COHXSec::fTMax
private

upper bound for t = (q - p_pi)^2

Definition at line 46 of file COHXSec.h.

Referenced by Integrate(), and LoadConfig().


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