00001 // 00002 // ******************************************************************** 00003 // * License and Disclaimer * 00004 // * * 00005 // * The Geant4 software is copyright of the Copyright Holders of * 00006 // * the Geant4 Collaboration. It is provided under the terms and * 00007 // * conditions of the Geant4 Software License, included in the file * 00008 // * LICENSE and available at http://cern.ch/geant4/license . These * 00009 // * include a list of copyright holders. * 00010 // * * 00011 // * Neither the authors of this software system, nor their employing * 00012 // * institutes,nor the agencies providing financial support for this * 00013 // * work make any representation or warranty, express or implied, * 00014 // * regarding this software system or assume any liability for its * 00015 // * use. Please see the license in the file LICENSE and URL above * 00016 // * for the full disclaimer and the limitation of liability. * 00017 // * * 00018 // * This code implementation is the result of the scientific and * 00019 // * technical work of the GEANT4 collaboration. * 00020 // * By using, copying, modifying or distributing the software (or * 00021 // * any work based on the software) you agree to acknowledge its * 00022 // * use in resulting scientific publications, and indicate your * 00023 // * acceptance of all terms of the Geant4 Software license. * 00024 // ******************************************************************** 00025 // 00026 // 00027 // $Id: GFlashSamplingShowerTuning.hh 69796 2013-05-15 13:26:12Z gcosmo $ 00028 // 00029 // 00030 //--------------------------------------------------------------- 00031 // GEANT 4 class header file 00032 // 00033 // GFlashSamplingShowerTuning 00034 // 00035 // Class description: 00036 // 00037 // Tuning class for GFlash homogeneous shower parameterisation. 00038 // Definitions: 00039 // <t>: shower center of gravity 00040 // T: Depth at shower maximum 00041 // Ec: Critical energy 00042 // X0: Radiation length 00043 // y = E/Ec 00044 // 00045 // Please, see hep-ex/0001020 for details. 00046 00047 // Author: Joanna Weng - 11.2005 00048 //--------------------------------------------------------------- 00049 #ifndef GFlashSamplingShowerTuning_hh 00050 #define GFlashSamplingShowerTuning_hh 00051 00052 #include "GVFlashHomoShowerTuning.hh" 00053 00054 class GFlashSamplingShowerTuning : public GVFlashHomoShowerTuning 00055 { 00056 public: 00057 00058 GFlashSamplingShowerTuning() {} 00059 virtual ~GFlashSamplingShowerTuning() {} 00060 00061 00062 public: // with description 00063 00064 G4double ParsAveT1(){ return -0.55;} // t1 00065 G4double ParsAveT2(){ return -0.69;} // t2 00066 // T_sam = log(exp( log T_hom) + t1*Fs-1 + t2*(1-ehat)) 00067 00068 G4double ParsAveA1(){ return -0.476; } // a1 00069 // alpha_sam = log(exp(log alphah_hom) +(a1*Fs-1)) 00070 00071 G4double ParsSigLogT1(){ return -2.5;} // t1 00072 G4double ParsSigLogT2(){ return 1.25;} // t2 00073 // std::sqrt(var(ln(T_sam))) = 1/(t+t2*ln(y)) 00074 00075 G4double ParsSigLogA1(){ return -0.82;} // a1 00076 G4double ParsSigLogA2(){ return 0.79; } // a2 00077 // std::sqrt(var(ln(alpha_sam))) = 1/(a1+a2*ln(y)) 00078 00079 G4double ParsRho1(){ return 0.784; } // r1 00080 G4double ParsRho2(){ return -0.023;} // r2 00081 // Correlation(ln(T),ln(alpha))=r1+r2*ln(y) 00082 00083 // Radial profiles 00084 // f(r) := (1/dE(t))(dE(t,r)/dr) 00085 // Ansatz: 00086 // f(r) = p(2*r*Rc**2)/(r**2+Rc**2)**2+(1-p)*(2*r*Rt**2)/(r**2+Rt**2)**2, 00087 // 0<p<1 00088 00089 G4double ParsRC1(){ return -0.0203; } // c1 00090 G4double ParsRC2(){ return 0.0397; } // c2 00091 // Rc_sam = Rc_hom + c1 * (1-ehat) + c2 *Fs-1*exp (-tau) 00092 00093 G4double ParsRT1(){ return -0.14; } // t1 00094 G4double ParsRT2(){ return -0.495; } // t2 00095 // Rt_sam = Rc_hom + t1 * (1-ehat) + t2 *Fs-1*exp (-tau) 00096 00097 G4double ParsWC1(){ return 0.348; } // c1 00098 G4double ParsWC2(){ return -0.642;} // c2 00099 // W_sam = W_hom + (1-ehat)*(c1 + c2 *Fs-1 * exp (- (tau -1 )**2)) 00100 00101 // Fluctuations on radial profiles through number of spots 00102 // The total number of spots needed for a shower is 00103 00104 G4double ParsSpotN1(){ return 10.3; } // n1 00105 G4double ParsSpotN2(){ return 0.959;} // n2 00106 // Ns = n1*ln(Z)(E/GeV)**n2 00107 00108 // The number of spots per longitudinal interval is: 00109 // (1/Ns)(dNs(t)/dt) = f(t) 00110 // = (beta*t)**(alpha-1)*beta*std::exp(-beta*t)/Gamma(alpha) 00111 // <t> = alpha_s/beta_s 00112 // Ts = (alpha_s-1)/beta_s 00113 // and 00114 // Ts = T*(t1+t2*Z) 00115 // alpha_s = alpha*(a1+a2*Z) 00116 00117 G4double ParsSpotT1(){ return 0.813; } // t1 00118 G4double ParsSpotT2(){ return 0.0019;} // t2 00119 00120 G4double ParsSpotA1(){ return 0.844; } //a1 00121 G4double ParsSpotA2(){ return 0.0026;} //a2 00122 00123 // Resolution 00124 00125 G4double ConstantResolution(){ return 0.00; } 00126 G4double NoiseResolution() { return 0.00; } // not used 00127 G4double SamplingResolution(){ return 0.11; } // not used 00128 00129 }; 00130 00131 #endif