Gabriele Cosmo
127 lines
4.7 KiB
C++
127 lines
4.7 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// $Id: GFlashSamplingShowerTuning.hh,v 1.3 2006/06/29 19:13:56 gunter Exp $
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// GEANT4 tag $Name: geant4-08-01 $
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//
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//
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//---------------------------------------------------------------
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// GEANT 4 class header file
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//
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// GFlashSamplingShowerTuning
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//
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// Class description:
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//
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// Tuning class for GFlash homogeneous shower parameterisation.
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// Definitions:
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// <t>: shower center of gravity
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// T: Depth at shower maximum
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// Ec: Critical energy
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// X0: Radiation length
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// y = E/Ec
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//
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// Please, see hep-ex/0001020 for details.
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// Author: Joanna Weng - 11.2005
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//---------------------------------------------------------------
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#ifndef GFlashSamplingShowerTuning_hh
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#define GFlashSamplingShowerTuning_hh
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#include "GVFlashHomoShowerTuning.hh"
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class GFlashSamplingShowerTuning : public GVFlashHomoShowerTuning
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{
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public: // with description
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G4double ParsAveT1(){ return -0.55;} // t1
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G4double ParsAveT2(){ return -0.69;} // t2
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// T_sam = log(exp( log T_hom) + t1*Fs-1 + t2*(1-ehat))
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G4double ParsAveA1(){ return -0.476; } // a1
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// alpha_sam = log(exp(log alphah_hom) +(a1*Fs-1))
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G4double ParsSigLogT1(){ return -2.5;} // t1
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G4double ParsSigLogT2(){ return 1.25;} // t2
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// std::sqrt(var(ln(T_sam))) = 1/(t+t2*ln(y))
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G4double ParsSigLogA1(){ return -0.82;} // a1
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G4double ParsSigLogA2(){ return 0.79; } // a2
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// std::sqrt(var(ln(alpha_sam))) = 1/(a1+a2*ln(y))
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G4double ParsRho1(){ return 0.784; } // r1
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G4double ParsRho2(){ return -0.023;} // r2
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// Correlation(ln(T),ln(alpha))=r1+r2*ln(y)
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// Radial profiles
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// f(r) := (1/dE(t))(dE(t,r)/dr)
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// Ansatz:
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// f(r) = p(2*r*Rc**2)/(r**2+Rc**2)**2+(1-p)*(2*r*Rt**2)/(r**2+Rt**2)**2,
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// 0<p<1
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G4double ParsRC1(){ return -0.0203; } // c1
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G4double ParsRC2(){ return 0.0397; } // c2
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// Rc_sam = Rc_hom + c1 * (1-ehat) + c2 *Fs-1*exp (-tau)
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G4double ParsRT1(){ return -0.14; } // t1
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G4double ParsRT2(){ return -0.495; } // t2
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// Rt_sam = Rc_hom + t1 * (1-ehat) + t2 *Fs-1*exp (-tau)
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G4double ParsWC1(){ return 0.348; } // c1
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G4double ParsWC2(){ return -0.642;} // c2
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// W_sam = W_hom + (1-ehat)*(c1 + c2 *Fs-1 * exp (- (tau -1 )**2))
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// Fluctuations on radial profiles through number of spots
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// The total number of spots needed for a shower is
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G4double ParsSpotN1(){ return 10.3; } // n1
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G4double ParsSpotN2(){ return 0.959;} // n2
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// Ns = n1*ln(Z)(E/GeV)**n2
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// The number of spots per longitudinal interval is:
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// (1/Ns)(dNs(t)/dt) = f(t)
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// = (beta*t)**(alpha-1)*beta*std::exp(-beta*t)/Gamma(alpha)
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// <t> = alpha_s/beta_s
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// Ts = (alpha_s-1)/beta_s
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// and
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// Ts = T*(t1+t2*Z)
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// alpha_s = alpha*(a1+a2*Z)
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G4double ParsSpotT1(){ return 0.813; } // t1
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G4double ParsSpotT2(){ return 0.0019;} // t2
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G4double ParsSpotA1(){ return 0.844; } //a1
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G4double ParsSpotA2(){ return 0.0026;} //a2
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// Resolution
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G4double ConstantResolution(){ return 0.00; }
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G4double NoiseResolution() { return 0.00; } // not used
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G4double SamplingResolution(){ return 0.11; } // not used
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};
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#endif
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