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2 | // ******************************************************************** |
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24 | // ******************************************************************** |
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25 | // |
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26 | // |
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27 | // $Id: G4SingleDiffractiveExcitation.hh,v 1.1 2007/05/25 07:30:47 gunter Exp $ |
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28 | |
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29 | #ifndef G4SingleDiffractiveExcitation_h |
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30 | #define G4SingleDiffractiveExcitation_h 1 |
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31 | // ------------------------------------------------------------ |
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32 | // GEANT 4 class header file |
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33 | // |
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34 | // ---------------- G4SingleDiffractiveExcitation -------------- |
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35 | // by Gunter Folger, October 1998. |
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36 | // diffractive Excitation used by strings models |
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37 | // Take a projectile and a target |
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38 | // excite the projectile and target |
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39 | // ------------------------------------------------------------ |
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40 | |
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41 | #include "globals.hh" |
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42 | class G4VSplitableHadron; |
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43 | class G4ExcitedString; |
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44 | #include "G4ThreeVector.hh" |
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45 | #include "G4QGSDiffractiveExcitation.hh" |
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46 | |
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47 | class G4SingleDiffractiveExcitation : public G4QGSDiffractiveExcitation |
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48 | { |
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49 | |
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50 | public: |
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51 | |
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52 | G4SingleDiffractiveExcitation(G4double sigmaPt=0.6*GeV, G4double minExtraMass=250*MeV,G4double x0mass=250*MeV); |
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53 | ~G4SingleDiffractiveExcitation(); |
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54 | |
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55 | G4bool ExciteParticipants (G4VSplitableHadron *aPartner, G4VSplitableHadron * bPartner) const; |
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56 | |
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57 | // void SetPtWidth(G4double aValue) { widthOfPtSquare = aValue*aValue; } |
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58 | // void SetExtraMass(G4double aValue) { minExtraMass = aValue; } |
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59 | // void SetMinimumMass(G4double aValue) { minmass = aValue; } |
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60 | |
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61 | |
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62 | private: |
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63 | |
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64 | G4SingleDiffractiveExcitation(const G4SingleDiffractiveExcitation &right); |
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65 | |
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66 | G4double ChooseX(G4double Xmin, G4double Xmax) const; |
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67 | G4ThreeVector GaussianPt(G4double widthSquare, G4double maxPtSquare) const; |
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68 | |
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69 | const G4SingleDiffractiveExcitation & operator=(const G4SingleDiffractiveExcitation &right); |
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70 | int operator==(const G4SingleDiffractiveExcitation &right) const; |
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71 | int operator!=(const G4SingleDiffractiveExcitation &right) const; |
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72 | |
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73 | private: |
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74 | // Model Parameters: |
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75 | const G4double widthOfPtSquare; // width^2 of pt for string excitation |
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76 | const G4double minExtraMass; // minimum excitation mass |
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77 | const G4double minmass; // mean pion transverse mass; used for Xmin |
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78 | }; |
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79 | |
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80 | #endif |
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