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genie::NuElectronPXSec Class Reference

nu/nubar + e- scattering differential cross section
The cross section algorithm handles: More...

#include <NuElectronPXSec.h>

Inheritance diagram for genie::NuElectronPXSec:
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Public Member Functions

 NuElectronPXSec ()
 
 NuElectronPXSec (string config)
 
virtual ~NuElectronPXSec ()
 
double XSec (const Interaction *i, KinePhaseSpace_t k) const
 Compute the cross section for the input interaction. More...
 
double Integral (const Interaction *i) const
 
bool ValidProcess (const Interaction *i) const
 Can this cross section algorithm handle the input process? More...
 
bool ValidKinematics (const Interaction *i) const
 Is the input kinematical point a physically allowed one? More...
 
void Configure (const Registry &config)
 
void Configure (string config)
 
- Public Member Functions inherited from genie::XSecAlgorithmI
virtual ~XSecAlgorithmI ()
 
- 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. 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 LoadConfig (void)
 

Private Attributes

const XSecIntegratorI * fXSecIntegrator
 
double fSin28w
 
double fSin48w
 

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::XSecAlgorithmI
 XSecAlgorithmI ()
 
 XSecAlgorithmI (string name)
 
 XSecAlgorithmI (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
 
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::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

nu/nubar + e- scattering differential cross section
The cross section algorithm handles: 

         - nue/nuebar + e- -> nue/nuebar + e- [CC + NC + interference]
         - numu/nutau + e- -> numu/nutau + e- [NC]
         - numubar/nutaubar + e- -> numubar/nutaubar + e- [NC]
         - numu/nutau + e- -> l- + nu_e [CC]

      Is a concrete implementation of the XSecAlgorithmI interface. \n
References:
W.J.Marciano and Z.Parsa, Neutrino-electron scattering theory, J.Phys.G: Nucl.Part.Phys. 29 (2003) 2629-2645
Author
Costas Andreopoulos <c.andreopoulos cern.ch> University of Liverpool
Created:
February 10, 2006
License:
Copyright (c) 2003-2024, The GENIE Collaboration For the full text of the license visit http://copyright.genie-mc.org

Definition at line 38 of file NuElectronPXSec.h.

Constructor & Destructor Documentation

NuElectronPXSec::NuElectronPXSec ( )

Definition at line 27 of file NuElectronPXSec.cxx.

27  :
28 XSecAlgorithmI("genie::NuElectronPXSec")
29 {
30 
31 }
NuElectronPXSec::NuElectronPXSec ( string  config)

Definition at line 33 of file NuElectronPXSec.cxx.

33  :
34 XSecAlgorithmI("genie::NuElectronPXSec", config)
35 {
36 
37 }
NuElectronPXSec::~NuElectronPXSec ( )
virtual

Definition at line 39 of file NuElectronPXSec.cxx.

40 {
41 
42 }

Member Function Documentation

void NuElectronPXSec::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 153 of file NuElectronPXSec.cxx.

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

154 {
155  Algorithm::Configure(config);
156  this->LoadConfig();
157 }
genie::Algorithm::Configure
virtual void Configure(const Registry &config)
Definition: Algorithm.cxx:62
void NuElectronPXSec::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 159 of file NuElectronPXSec.cxx.

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

160 {
161  Algorithm::Configure(config);
162  this->LoadConfig();
163 }
genie::Algorithm::Configure
virtual void Configure(const Registry &config)
Definition: Algorithm.cxx:62
double NuElectronPXSec::Integral ( const Interaction *  i) const
virtual

Integrate the model over the kinematic phase space available to the input interaction (kinematical cuts can be included)

Implements genie::XSecAlgorithmI.

Definition at line 135 of file NuElectronPXSec.cxx.

References fXSecIntegrator, and genie::XSecIntegratorI::Integrate().

136 {
137  double xsec = fXSecIntegrator->Integrate(this,interaction);
138  return xsec;
139 }
genie::NuElectronPXSec::fXSecIntegrator
const XSecIntegratorI * fXSecIntegrator
Definition: NuElectronPXSec.h:59
genie::XSecIntegratorI::Integrate
virtual double Integrate(const XSecAlgorithmI *model, const Interaction *interaction) const =0
void NuElectronPXSec::LoadConfig ( void  )
private

Definition at line 165 of file NuElectronPXSec.cxx.

References fSin28w, fSin48w, fXSecIntegrator, genie::Algorithm::GetParam(), and genie::Algorithm::SubAlg().

Referenced by Configure().

166 {
167  // weinberg angle
168  double thw ;
169  GetParam( "WeinbergAngle", thw ) ;
170  fSin28w = TMath::Power(TMath::Sin(thw), 2);
171  fSin48w = TMath::Power(TMath::Sin(thw), 4);
172 
173  // load XSec Integrator
174  fXSecIntegrator =
175  dynamic_cast<const XSecIntegratorI *> (this->SubAlg("XSec-Integrator"));
176  assert(fXSecIntegrator);
177 }
genie::XSecIntegratorI
Cross Section Integrator Interface.
Definition: XSecIntegratorI.h:29
genie::NuElectronPXSec::fXSecIntegrator
const XSecIntegratorI * fXSecIntegrator
Definition: NuElectronPXSec.h:59
genie::Algorithm::GetParam
bool GetParam(const RgKey &name, T &p, bool is_top_call=true) const
genie::Algorithm::SubAlg
const Algorithm * SubAlg(const RgKey &registry_key) const
Definition: Algorithm.cxx:345
bool NuElectronPXSec::ValidKinematics ( const Interaction *  i) const
virtual

Is the input kinematical point a physically allowed one?

Reimplemented from genie::XSecAlgorithmI.

Definition at line 147 of file NuElectronPXSec.cxx.

References genie::kISkipKinematicChk.

Referenced by XSec().

148 {
149  if(interaction->TestBit(kISkipKinematicChk)) return true;
150  return true;
151 }
genie::kISkipKinematicChk
const UInt_t kISkipKinematicChk
if set, skip kinematic validity checks
Definition: Interaction.h:48
bool NuElectronPXSec::ValidProcess ( const Interaction *  i) const
virtual

Can this cross section algorithm handle the input process?

Implements genie::XSecAlgorithmI.

Definition at line 141 of file NuElectronPXSec.cxx.

References genie::kISkipProcessChk.

Referenced by XSec().

142 {
143  if(interaction->TestBit(kISkipProcessChk)) return true;
144  return true;
145 }
genie::kISkipProcessChk
const UInt_t kISkipProcessChk
if set, skip process validity checks
Definition: Interaction.h:47
double NuElectronPXSec::XSec ( const Interaction *  i,
KinePhaseSpace_t  k 
) const
virtual

Compute the cross section for the input interaction.

Implements genie::XSecAlgorithmI.

Definition at line 44 of file NuElectronPXSec.cxx.

References genie::units::A, fSin28w, genie::pdg::IsAntiNuE(), genie::pdg::IsAntiNuMu(), genie::pdg::IsAntiNuTau(), genie::pdg::IsNuE(), genie::pdg::IsNuMu(), genie::pdg::IsNuTau(), genie::ProcessInfo::IsWeakCC(), genie::ProcessInfo::IsWeakNC(), genie::utils::mec::J(), genie::utils::kinematics::Jacobian(), genie::constants::kElectronMass, genie::constants::kGF2, genie::kIAssumeFreeElectron, genie::constants::kPi, genie::kPSyfE, genie::kRfLab, LOG, pDEBUG, genie::InitialState::ProbeE(), genie::InitialState::ProbePdg(), genie::InitialState::Tgt(), ValidKinematics(), ValidProcess(), genie::Kinematics::y(), and genie::Target::Z().

46 {
47  if(! this -> ValidProcess (interaction) ) return 0.;
48  if(! this -> ValidKinematics (interaction) ) return 0.;
49 
50  //----- get initial state & kinematics
51  const InitialState & init_state = interaction -> InitState();
52  const Kinematics & kinematics = interaction -> Kine();
53  const ProcessInfo & proc_info = interaction -> ProcInfo();
54 
55  double Ev = init_state.ProbeE(kRfLab);
56  double me = kElectronMass;
57  double y = kinematics.y();
58  double A = kGF2*2*me*Ev/kPi;
59 
60  y = 1 - me/Ev - y; // FSPL = electron. XSec below are expressed in Marciano's y!
61  if(y > 1/(1+0.5*me/Ev)) return 0;
62  if(y < 0) return 0;
63 
64  double xsec = 0; // <-- dxsec/dy
65 
66  int inu = init_state.ProbePdg();
67 
68  // nue + e- -> nue + e- [CC + NC + interference]
69  if(pdg::IsNuE(inu))
70  {
71  double em = -0.5 - fSin28w;
72  double ep = -fSin28w;
73  xsec = TMath::Power(em,2) + TMath::Power(ep*(1-y),2) - ep*em*me*y/Ev;
74  xsec *= A;
75  }
76 
77  // nuebar + e- -> nue + e- [CC + NC + interference]
78  if(pdg::IsAntiNuE(inu))
79  {
80  double em = -0.5 - fSin28w;
81  double ep = -fSin28w;
82  xsec = TMath::Power(ep,2) + TMath::Power(em*(1-y),2) - ep*em*me*y/Ev;
83  xsec *= A;
84  }
85 
86  // numu/nutau + e- -> numu/nutau + e- [NC]
87  if( (pdg::IsNuMu(inu)||pdg::IsNuTau(inu)) && proc_info.IsWeakNC() )
88  {
89  double em = 0.5 - fSin28w;
90  double ep = -fSin28w;
91  xsec = TMath::Power(em,2) + TMath::Power(ep*(1-y),2) - ep*em*me*y/Ev;
92  xsec *= A;
93  }
94 
95  // numubar/nutaubar + e- -> numubar/nutaubar + e- [NC]
96  if( (pdg::IsAntiNuMu(inu)||pdg::IsAntiNuTau(inu)) && proc_info.IsWeakNC() )
97  {
98  double em = 0.5 - fSin28w;
99  double ep = -fSin28w;
100  xsec = TMath::Power(ep,2) + TMath::Power(em*(1-y),2) - ep*em*me*y/Ev;
101  xsec *= A;
102  }
103 
104  // numu/nutau + e- -> l- + nu_e [CC}
105  if( (pdg::IsNuMu(inu)||pdg::IsNuTau(inu)) && proc_info.IsWeakCC() ) xsec=0;
106 /*
107  double ml = (pdg::IsNuMu(inu)) ? kMuonMass : kTauMass;
108  double ml2 = TMath::Power(ml,2);
109  xsec = (kGF2*s/kPi)*(1-ml2/s);
110  xsec = TMath::Max(0.,xsec); // if s<ml2 => xsec<0 : force to xsec=0
111 */
112 
113 #ifdef __GENIE_LOW_LEVEL_MESG_ENABLED__
114  LOG("Elastic", pDEBUG)
115  << "*** dxsec(ve-)/dy [free e-](Ev="<< Ev << ", y= "<< y<< ") = "<< xsec;
116 #endif
117 
118  //----- The algorithm computes dxsec/dy
119  // Check whether variable tranformation is needed
120  if(kps!=kPSyfE) {
121  double J = utils::kinematics::Jacobian(interaction,kPSyfE,kps);
122  xsec *= J;
123  }
124 
125  //----- If requested return the free electron xsec even for nuclear target
126  if( interaction->TestBit(kIAssumeFreeElectron) ) return xsec;
127 
128  //----- Scale for the number of scattering centers at the target
129  int Ne = init_state.Tgt().Z(); // num of scattering centers
130  xsec *= Ne;
131 
132  return xsec;
133 }
genie::pdg::IsNuTau
bool IsNuTau(int pdgc)
Definition: PDGUtils.cxx:168
genie::ProcessInfo::IsWeakCC
bool IsWeakCC(void) const
Definition: ProcessInfo.cxx:203
genie::utils::mec::J
double J(double q0, double q3, double Enu, double ml)
Definition: MECUtils.cxx:147
genie::Kinematics
Generated/set kinematical variables for an event.
Definition: Kinematics.h:39
genie::pdg::IsAntiNuTau
bool IsAntiNuTau(int pdgc)
Definition: PDGUtils.cxx:183
genie::pdg::IsNuE
bool IsNuE(int pdgc)
Definition: PDGUtils.cxx:158
genie::constants::kElectronMass
static const double kElectronMass
Definition: Framework/Conventions/Constants.h:70
genie::Kinematics::y
double y(bool selected=false) const
Definition: Kinematics.cxx:112
genie::pdg::IsNuMu
bool IsNuMu(int pdgc)
Definition: PDGUtils.cxx:163
genie::ProcessInfo::IsWeakNC
bool IsWeakNC(void) const
Definition: ProcessInfo.cxx:208
LOG
#define LOG(stream, priority)
A macro that returns the requested log4cpp::Category appending a string (using the FILE...
Definition: Messenger.h:96
genie::units::A
static constexpr double A
Definition: Units.h:74
genie::ProcessInfo
A class encapsulating an enumeration of interaction types (EM, Weak-CC, Weak-NC) and scattering types...
Definition: ProcessInfo.h:46
genie::InitialState::ProbePdg
int ProbePdg(void) const
Definition: InitialState.h:64
genie::Target::Z
int Z(void) const
Definition: Target.h:68
genie::pdg::IsAntiNuMu
bool IsAntiNuMu(int pdgc)
Definition: PDGUtils.cxx:178
genie::NuElectronPXSec::ValidKinematics
bool ValidKinematics(const Interaction *i) const
Is the input kinematical point a physically allowed one?
Definition: NuElectronPXSec.cxx:147
genie::utils::kinematics::Jacobian
double Jacobian(const Interaction *const i, KinePhaseSpace_t f, KinePhaseSpace_t t)
Definition: KineUtils.cxx:130
genie::InitialState::Tgt
const Target & Tgt(void) const
Definition: InitialState.h:66
genie::NuElectronPXSec::ValidProcess
bool ValidProcess(const Interaction *i) const
Can this cross section algorithm handle the input process?
Definition: NuElectronPXSec.cxx:141
genie::InitialState::ProbeE
double ProbeE(RefFrame_t rf) const
Definition: InitialState.cxx:384
genie::pdg::IsAntiNuE
bool IsAntiNuE(int pdgc)
Definition: PDGUtils.cxx:173
genie::InitialState
Initial State information.
Definition: InitialState.h:48
pDEBUG
#define pDEBUG
Definition: Messenger.h:63
genie::kIAssumeFreeElectron
const UInt_t kIAssumeFreeElectron
Definition: Interaction.h:50

Member Data Documentation

double genie::NuElectronPXSec::fSin28w
private

Definition at line 61 of file NuElectronPXSec.h.

Referenced by LoadConfig(), and XSec().

double genie::NuElectronPXSec::fSin48w
private

Definition at line 62 of file NuElectronPXSec.h.

Referenced by LoadConfig().

const XSecIntegratorI* genie::NuElectronPXSec::fXSecIntegrator
private

Definition at line 59 of file NuElectronPXSec.h.

Referenced by Integral(), and LoadConfig().

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