Geant4  10.02.p01
Par02DetectorParametrisation.cc
Go to the documentation of this file.
1 //
2 // ********************************************************************
3 // * License and Disclaimer *
4 // * *
5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. *
10 // * *
11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitation of liability. *
17 // * *
18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Software license. *
24 // ********************************************************************
25 //
26 // $Id: $
27 //
30 
32 #include "G4SystemOfUnits.hh"
33 #include "G4UnitsTable.hh"
34 
35 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
36 
38 
39 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
40 
42 
43 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
44 
46  Parametrisation aParam,
47  G4double aMomentum ) {
48  aMomentum /= GeV; // To make sure momentum's unit is GeV
49  G4double res = 1.0;
50  if ( aParam == eCMS ) {
51  switch ( aDetector ) {
53  res = 0.013;
54  break;
56  res = std::sqrt( std::pow( 0.03 / std::sqrt( aMomentum ), 2 ) // stochastic
57  + std::pow( 0.12 / aMomentum, 2 ) // noise
58  + std::pow( 0.003, 2 ) ); // constant
59  break;
61  res = std::sqrt( std::pow( 1.1 / std::sqrt( aMomentum ), 2 ) // stochastic
62  + std::pow( 0.09, 2 ) ); // constant
63  break;
64  }
65  } else if ( aParam == eATLAS ) {
66  switch ( aDetector ) {
68  res = 0.01;
69  break;
71  res = std::sqrt( std::pow( 0.1 / std::sqrt( aMomentum ), 2 ) // stochastic
72  + std::pow( 0.0017, 2 ) ); // constant
73  break;
75  res = std::sqrt( std::pow( 0.55 / std::sqrt( aMomentum ), 2 ) // stochastic
76  + std::pow( 0.06, 2 ) ); // constant
77  break;
78  }
79  } else if ( aParam == eALEPH ) {
80  switch ( aDetector ) {
82  res = 0.01;
83  break;
85  res = std::sqrt( std::pow( 0.18 / std::sqrt( aMomentum ), 2 ) // stochastic
86  + std::pow( 0.009, 2 ) ); // constant
87  break;
89  res = 0.85 / std::sqrt( aMomentum ); // stochastic
90  break;
91  }
92  }
93  return res;
94 }
95 
96 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
97 
99  Parametrisation /*aParam*/,
100  G4double /*aMomentum*/ ) {
101  // For the time being, we set the efficiency to 1.0
102  G4double eff = 1.0;
103  switch ( aDetector ) {
105  eff = 1.0;
106  break;
108  eff = 1.0;
109  break;
111  eff = 1.0;
112  break;
113  }
114  return eff;
115 }
116 
117 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
118 
Par02DetectorParametrisation()
A default constructor.
Detector
A detector type (tracking detector, electromagnetic calorimeter, hadronic calorimeter).
Definition of the Par02DetectorParameterisation class.
Parametrisation
A parametrisation type (CMS, ATLAS, ALEPH).
static const double GeV
Definition: G4SIunits.hh:214
G4double GetResolution(Detector aDetector, Parametrisation aParametrisation, G4double aMomentum)
Gets the resolution of a detector for a given particle.
G4double GetEfficiency(Detector aDetector, Parametrisation aParametrisation, G4double aMomentum)
Gets the efficiency of a detector for a given particle.
double G4double
Definition: G4Types.hh:76