Import Geant4 4.0.0 source tree

2016-06-08 16:18:25 +02:00
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+//
+// ********************************************************************
+// * DISCLAIMER                                                       *
+// *                                                                  *
+// * The following disclaimer summarizes all the specific disclaimers *
+// * of contributors to this software. The specific disclaimers,which *
+// * govern, are listed with their locations in:                      *
+// *   http://cern.ch/geant4/license                                  *
+// *                                                                  *
+// * Neither the authors of this software system, nor their employing *
+// * institutes,nor the agencies providing financial support for this *
+// * work  make  any representation or  warranty, express or implied, *
+// * regarding  this  software system or assume any liability for its *
+// * use.                                                             *
+// *                                                                  *
+// * This  code  implementation is the  intellectual property  of the *
+// * authors in the GEANT4 collaboration.                             *
+// * By copying,  distributing  or modifying the Program (or any work *
+// * based  on  the Program)  you indicate  your  acceptance of  this *
+// * statement, and all its terms.                                    *
+// ********************************************************************
+//
+//
+// $Id: G4SampleResonance.hh,v 1.4 2001/10/04 20:00:33 hpw Exp $
+// GEANT4 tag $Name: geant4-04-00 $
+//
+
+#ifndef G4SampleResonance_h
+#define G4SampleResonance_h 1
+
+// ------------------------------------------------------------
+//      GEANT 4 class header file
+//
+//      ---------------- G4SampleResonance ----------------
+//             by Henning Weber, March 2001.
+//      helper class for sampling resonance masses
+// ------------------------------------------------------------
+
+#include "globals.hh"
+#include "g4std/map"
+#include "G4ParticleDefinition.hh"
+
+
+class G4SampleResonance
+{
+public:
+
+  G4double GetMinimumMass(const G4ParticleDefinition* p) const;
+  G4double SampleMass(const G4double poleMass, 
+		      const G4double gamma,
+		      const G4double minMass,
+		      const G4double maxMass) const;
+  G4double SampleMass(const G4ParticleDefinition* p, const G4double maxMass) const;
+
+private:  
+
+  G4double BrWigInt0(const G4double x, const G4double gamma, const G4double m0) const
+    { return 2.0*gamma*atan( 2.0 * (x-m0)/ gamma  ); }
+
+  G4double BrWigInt1(const G4double x, const G4double gamma, const G4double m0) const
+    { return 0.5*gamma*gamma*log( (x-m0)*(x-m0)+gamma*gamma/4.0 ) + m0*BrWigInt0(x,gamma,m0); }
+
+  G4double BrWigInv(const G4double x, const G4double gamma, const G4double m0) const
+    { return 0.5*gamma*tan( 0.5*x/gamma )+m0; }
+
+public:  
+
+  typedef G4std::map<const G4ParticleDefinition*, G4double, G4std::less<const G4ParticleDefinition*> >::const_iterator minMassMapIterator; 
+  typedef G4std::map<const G4ParticleDefinition*, G4double, G4std::less<const G4ParticleDefinition*> > minMassMapType;
+
+private:
+
+  static minMassMapType minMassCache;
+
+};
+
+
+#endif
+
+
+
+
+
+