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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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Collaboration 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 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)

Private Attributes

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

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)
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::XSecIntegratorI
const IntegratorI * fIntegrator
 GENIE numerical integrator.
string fGSLIntgType
 name of GSL numerical integrator
double fGSLRelTol
 required relative tolerance (error)
int fGSLMaxEval
 GSL max evaluations.
int fGSLMinEval
 GSL min evaluations. Ignored by some integrators.
unsigned int fGSLMaxSizeOfSubintervals
 GSL maximum number of sub-intervals for 1D integrator.
unsigned int fGSLRule
 GSL Gauss-Kronrod integration rule (only for GSL 1D adaptive type)
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

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

Author
Costas Andreopoulos <c.andreopoulos \at cern.ch> University of Liverpool
Created:\n May 04, 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 26 of file COHXSec.h.

Constructor & Destructor Documentation

◆ COHXSec() [1/2]

COHXSec::COHXSec ( )

Definition at line 34 of file COHXSec.cxx.

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

References genie::XSecIntegratorI::XSecIntegratorI().

◆ COHXSec() [2/2]

COHXSec::COHXSec ( string config)

Definition at line 40 of file COHXSec.cxx.

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

References genie::XSecIntegratorI::XSecIntegratorI().

◆ ~COHXSec()

COHXSec::~COHXSec ( )
virtual

Definition at line 46 of file COHXSec.cxx.

47{
48
49}

Member Function Documentation

◆ Configure() [1/2]

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.

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

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

◆ Configure() [2/2]

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.

159{
160 Algorithm::Configure(config);
161 this->LoadConfig();
162}

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

◆ Integrate()

double COHXSec::Integrate ( const XSecAlgorithmI * model,
const Interaction * i ) const
virtual

Implements genie::XSecIntegratorI.

Definition at line 51 of file COHXSec.cxx.

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;
64 Q2l.min = controls::kASmallNum;
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 =
82 utils::gsl::IntegrationNDimTypeFromString(fGSLIntgType);
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 =
103 utils::gsl::IntegrationNDimTypeFromString(fGSLIntgType);
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;
121 tl.min = controls::kASmallNum;
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 =
127 utils::gsl::IntegrationNDimTypeFromString(fGSLIntgType);
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}
pINFO
#define pINFO
Definition Messenger.h:62
pDEBUG
#define pDEBUG
Definition Messenger.h:63
LOG
#define LOG(stream, priority)
A macro that returns the requested log4cpp::Category appending a string (using the FILE,...
Definition Messenger.h:96
genie::AlgId::Name
string Name(void) const
Definition AlgId.h:44
genie::Algorithm::Id
virtual const AlgId & Id(void) const
Get algorithm ID.
Definition Algorithm.h:98
genie::COHXSec::fQ2Max
double fQ2Max
upper bound of integration for Q^2 in Berger-Sehgal Model
Definition COHXSec.h:45
genie::COHXSec::fTMax
double fTMax
upper bound for t = (q - p_pi)^2
Definition COHXSec.h:46
genie::InitialState::ProbeE
double ProbeE(RefFrame_t rf) const
Definition InitialState.cxx:384
genie::Interaction::InitState
const InitialState & InitState(void) const
Definition Interaction.h:69
genie::KPhaseSpace::IsAboveThreshold
bool IsAboveThreshold(void) const
Checks whether the interaction is above the energy threshold.
Definition KPhaseSpace.cxx:284
genie::KPhaseSpace::Limits
Range1D_t Limits(KineVar_t kvar) const
Return the kinematical variable limits.
Definition KPhaseSpace.cxx:250
genie::Range1D_t::max
double max
Definition Range1.h:53
genie::Range1D_t::min
double min
Definition Range1.h:52
genie::XSecAlgorithmI::ValidProcess
virtual bool ValidProcess(const Interaction *i) const =0
Can this cross section algorithm handle the input process?
genie::XSecIntegratorI::fGSLMinEval
int fGSLMinEval
GSL min evaluations. Ignored by some integrators.
Definition XSecIntegratorI.h:47
genie::XSecIntegratorI::fGSLIntgType
string fGSLIntgType
name of GSL numerical integrator
Definition XSecIntegratorI.h:44
genie::XSecIntegratorI::fGSLMaxEval
int fGSLMaxEval
GSL max evaluations.
Definition XSecIntegratorI.h:46
genie::XSecIntegratorI::fGSLRelTol
double fGSLRelTol
required relative tolerance (error)
Definition XSecIntegratorI.h:45
func
double func(double x, double y)
Definition gtestBLI2DUnifGrid.cxx:81
genie::controls::kASmallNum
static const double kASmallNum
Definition Controls.h:40
genie::units::cm2
static constexpr double cm2
Definition Units.h:69
genie::utils::gsl::IntegrationNDimTypeFromString
ROOT::Math::IntegrationMultiDim::Type IntegrationNDimTypeFromString(string type)
Definition GSLUtils.cxx:59
genie::kKVx
@ kKVx
Definition KineVar.h:31
genie::kKVy
@ kKVy
Definition KineVar.h:32
genie::kRfLab
@ kRfLab
Definition RefFrame.h:26
genie::kISkipProcessChk
const UInt_t kISkipProcessChk
if set, skip process validity checks
Definition Interaction.h:47

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().

◆ LoadConfig()

void COHXSec::LoadConfig ( void )
private

Definition at line 164 of file COHXSec.cxx.

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}
genie::Algorithm::GetParam
bool GetParam(const RgKey &name, T &p, bool is_top_call=true) const
genie::Algorithm::GetParamDef
bool GetParamDef(const RgKey &name, T &p, const T &def) const
genie::COHXSec::fQ2Min
double fQ2Min
lower bound of integration for Q^2 in Berger-Sehgal Model
Definition COHXSec.h:44

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(), and Configure().

Member Data Documentation

◆ fQ2Max

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().

◆ fQ2Min

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().

◆ fTMax

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:
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