Gabriele Cosmo
100 lines
3.5 KiB
C++
100 lines
3.5 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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// GEANT 4 class header file
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//
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// History:
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// 30 July 2007 P.Gumplinger
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// Samples Radiative Pion Decay
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// Reference:
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// TRIUMF/PIENU Technote:
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// "Inclusion of pi->enug in the Monte Carlo"
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// by M. Blecher
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//
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// ------------------------------------------------------------
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//
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//
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//
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//
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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#ifndef G4PionRadiativeDecayChannel_h
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#define G4PionRadiativeDecayChannel_h 1
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#include "globals.hh"
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#include "Randomize.hh"
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#include "G4ThreeVector.hh"
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#include "G4VDecayChannel.hh"
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class G4PionRadiativeDecayChannel : public G4VDecayChannel
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{
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// Class Decription
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// This class describes radiative pion decay kinemtics, but
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// gives incorrect energy spectrum for neutrino
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public: // With Description
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//Constructors
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G4PionRadiativeDecayChannel(const G4String& theParentName,
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G4double theBR);
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// Destructor
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virtual ~G4PionRadiativeDecayChannel();
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public: // With Description
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virtual G4DecayProducts *DecayIt(G4double);
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private:
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G4double beta;
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G4double cib;
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G4double csdp;
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G4double csdm;
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G4double cif;
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G4double cig;
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G4double xl, yl, xu, yu, d2wmax;
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G4double D2W(const G4double x, const G4double y);
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};
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inline G4double G4PionRadiativeDecayChannel::D2W(const G4double x,
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const G4double y)
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{
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G4double d2w = cib*(1.-y)*(1.+((1.-x)*(1.-x)))/((x*x)*(x+y-1.)) +
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csdp*(1.-x)*((x+y-1.)*(x+y-1.)) +
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csdm*(1.-x)*((1.-y)*(1.-y)) +
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cif*(x-1.)*(1.-y)/x +
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cig*(1.-y)*(1.-x+(x*x)/(x+y-1.))/x;
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return d2w;
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}
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#endif
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