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Pythia6.hh
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1 //
2 // ********************************************************************
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25 //
26 // $Id: Pythia6.hh,v 1.1 2014/10/05 03:12:12 mccumber Exp $
27 //
30 
31 //
32 // ----------------------------------------------------------------------------
33 
34 // ******************************************************************************
35 // ******************************************************************************
36 // ** **
37 // ** **
38 // ** *......* Welcome to the Lund Monte Carlo! **
39 // ** *:::!!:::::::::::* **
40 // ** *::::::!!::::::::::::::* PPP Y Y TTTTT H H III A **
41 // ** *::::::::!!::::::::::::::::* P P Y Y T H H I A A **
42 // ** *:::::::::!!:::::::::::::::::* PPP Y T HHHHH I AAAAA **
43 // ** *:::::::::!!:::::::::::::::::* P Y T H H I A A **
44 // ** *::::::::!!::::::::::::::::*! P Y T H H III A A **
45 // ** *::::::!!::::::::::::::* !! **
46 // ** !! *:::!!:::::::::::* !! This is PYTHIA version 6.418 **
47 // ** !! !* -><- * !! Last date of change: 9 Jun 2008 **
48 // ** !! !! !! **
49 // ** !! !! !! Now is 0 Jan 2000 at 0:00:00 **
50 // ** !! !! **
51 // ** !! lh !! Disclaimer: this program comes **
52 // ** !! !! without any guarantees. Beware **
53 // ** !! hh !! of errors and use common sense **
54 // ** !! ll !! when interpreting results. **
55 // ** !! !! **
56 // ** !! Copyright T. Sjostrand (2008) **
57 // ** **
58 // ** An archive of program versions and documentation is found on the web: **
59 // ** http://www.thep.lu.se/~torbjorn/Pythia.html **
60 // ** **
61 // ** When you cite this program, the official reference is to the 6.4 manual: **
62 // ** T. Sjostrand, S. Mrenna and P. Skands, JHEP05 (2006) 026 **
63 // ** (LU TP 06-13, FERMILAB-PUB-06-052-CD-T) [hep-ph/0603175]. **
64 // ** **
65 // ** Also remember that the program, to a large extent, represents original **
66 // ** physics research. Other publications of special relevance to your **
67 // ** studies may therefore deserve separate mention. **
68 // ** **
69 // ** Main author: Torbjorn Sjostrand; Department of Theoretical Physics, **
70 // ** Lund University, Solvegatan 14A, S-223 62 Lund, Sweden; **
71 // ** phone: + 46 - 46 - 222 48 16; e-mail: torbjorn@thep.lu.se **
72 // ** Author: Stephen Mrenna; Computing Division, GDS Group, **
73 // ** Fermi National Accelerator Laboratory, MS 234, Batavia, IL 60510, USA; **
74 // ** phone: + 1 - 630 - 840 - 2556; e-mail: mrenna@fnal.gov **
75 // ** Author: Peter Skands; Theoretical Physics Department, **
76 // ** Fermi National Accelerator Laboratory, MS 106, Batavia, IL 60510, USA; **
77 // ** and CERN/PH, CH-1211 Geneva, Switzerland; **
78 // ** phone: + 41 - 22 - 767 24 59; e-mail: skands@fnal.gov **
79 // ** **
80 // ** **
81 // ******************************************************************************
82 
83 #ifndef PYTHIA_Pythia6
84 #define PYTHIA_Pythia6
85 
86 #include <vector>
87 
88 int const KNDCAY = 8000; //should be 4000 for pythia61
89 
91 struct Pyjets_t
92 {
93  int N;
94  int NPAD;
95  int K[5][4000];
96  double P[5][4000];
97  double V[5][4000];
98 };
99 
101 struct Pydat1_t
102 {
103  int MSTU[200];
104  double PARU[200];
105  int MSTJ[200];
106  double PARJ[200];
107 };
108 
110 struct Pydat3_t
111 {
112  int MDCY[3][500];
113  int MDME[2][KNDCAY];
114  double BRAT[KNDCAY];
115  int KFDP[5][KNDCAY];
116 };
117 
119 struct Pythia6Particle
120 {
121  Pythia6Particle(
122  int ks, int kf, int parent, int firstChild, int lastChild,
123  float px, float py, float pz, float energy, float mass,
124  float vx, float vy, float vz, float time, float lifetime)
125  : fKS(ks), fKF(kf),
126  fParent(parent), fFirstChild(firstChild), fLastChild(lastChild),
127  fPx(px), fPy(py), fPz(pz), fEnergy(energy), fMass(mass),
128  fVx(vx), fVy(vy), fVz(vz), fTime(time), fLifetime(lifetime) {}
129 
130  int fKS; // status of particle ( LUJETS K[1] )
131  int fKF; // KF flavour code ( LUJETS K[2] )
132  int fParent; // parrent's id ( LUJETS K[3] )
133  int fFirstChild; // id of first child ( LUJETS K[4] )
134  int fLastChild; // id of last child ( LUJETS K[5] )
135 
136  float fPx; // X momenta [GeV/c] ( LUJETS P[1] )
137  float fPy; // Y momenta [GeV/c] ( LUJETS P[2] )
138  float fPz; // Z momenta [GeV/c] ( LUJETS P[3] )
139  float fEnergy; // Energy [GeV] ( LUJETS P[4] )
140  float fMass; // Mass [Gev/c^2] ( LUJETS P[5] )
141 
142  float fVx; // X vertex [mm] ( LUJETS V[1] )
143  float fVy; // Y vertex [mm] ( LUJETS V[2] )
144  float fVz; // Z vertex [mm] ( LUJETS V[3] )
145  float fTime; // time of procuction [mm/c]( LUJETS V[4] )
146  float fLifetime; // proper lifetime [mm/c] ( LUJETS V[5] )
147 };
148 
149 typedef std::vector<Pythia6Particle*> ParticleVector;
150 
162 
163 class Pythia6
164 {
165  public:
166 
167  // ****** constructors and destructor
168  Pythia6();
169  virtual ~Pythia6();
170 
171  static Pythia6 *Instance();
172 
173  // ****** TPYTHIA routines
174  //
175  int Pycomp(int kf);
176  void Py1ent(int line, int kf, double pe, double theta, double phi);
177  ParticleVector* ImportParticles();
178  int ImportParticles(ParticleVector* particles, const char* option="");
179 
180  // ****** /PYDAT1/
181  //
182  void SetMSTJ(int i, int m ) { fPydat1->MSTJ[i-1] = m; }
183 
184  // ****** /PYDAT3/
185  //
186  int GetMDCY(int i, int j) { return fPydat3->MDCY[j-1][i-1]; }
187  int GetKFDP(int i, int j) { return fPydat3->KFDP[j-1][i-1]; }
188  void SetMDCY(int i, int j, int m) { fPydat3->MDCY[j-1][i-1] = m; }
189  void SetMDME(int i, int j, int m) { fPydat3->MDME[j-1][i-1] = m; }
190 
191  private:
192  static Pythia6* fgInstance;
193 
194  ParticleVector* fParticles;
195  Pyjets_t* fPyjets;
196  Pydat1_t* fPydat1;
197  Pydat3_t* fPydat3;
198 };
199 
200 #endif
201