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// $Id$

#ifndef G4QGSDiffractiveExcitation_h
#define G4QGSDiffractiveExcitation_h 1
// ------------------------------------------------------------
//      GEANT 4 class header file
//
//      ---------------- G4QGSDiffractiveExcitation --------------
//             by Gunter Folger, October 1998.
//      diffractive Excitation used by strings models
//	Take a projectile and a target
//	excite the projectile and target
// ------------------------------------------------------------

// Modified:
//  25-05-07 : G.Folger
//       move from management/G4DiffractiveExcitation to to qgsm/G4QGSDiffractiveExcitation
//                  

#include "globals.hh"
class G4VSplitableHadron;
class G4ExcitedString;
#include "G4ThreeVector.hh"

class G4QGSDiffractiveExcitation 
{

public:

	G4QGSDiffractiveExcitation();                           // Uzhi
	virtual ~G4QGSDiffractiveExcitation();

	virtual G4bool ExciteParticipants (G4VSplitableHadron *aPartner, G4VSplitableHadron * bPartner) const;
	virtual G4ExcitedString * String(G4VSplitableHadron * aHadron, G4bool isProjectile) const;

	//      void SetPtWidth(G4double aValue) { widthOfPtSquare = aValue*aValue; }
	//      void SetExtraMass(G4double aValue) { minExtraMass = aValue; }
	//      void SetMinimumMass(G4double aValue) { minmass = aValue; }


private:

	G4QGSDiffractiveExcitation(const G4QGSDiffractiveExcitation &right);

	//    G4double ChooseX(G4double Xmin, G4double Xmax) const;                       // Uzhi
	G4double ChooseP(G4double Pmin, G4double Pmax) const;                       // Uzhi

	//    G4ThreeVector GaussianPt(G4double widthSquare, G4double maxPtSquare) const;
	G4ThreeVector GaussianPt(G4double  AveragePt2, G4double maxPtSquare) const;  // Uzhi

	const G4QGSDiffractiveExcitation & operator=(const G4QGSDiffractiveExcitation &right);
	int operator==(const G4QGSDiffractiveExcitation &right) const;
	int operator!=(const G4QGSDiffractiveExcitation &right) const;

private:
	// Model Parameters:
	/*                                                                                // Uzhi
	const G4double widthOfPtSquare;	// width^2 of pt for string excitation    
	const G4double minExtraMass;	// minimum excitation mass                
	const G4double minmass;	// mean pion transverse mass; used for Xmin       
	 */                                                                                // Uzhi
};

#endif