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1 // 1 //
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24 // ******************************************* 24 // ********************************************************************
25 // 25 //
>> 26 // $Id: Pythia6.cc 72244 2013-07-12 08:49:56Z gcosmo $
26 // 27 //
27 /// \file eventgenerator/pythia/decayer6/src/P 28 /// \file eventgenerator/pythia/decayer6/src/Pythia6.cc
28 /// \brief Implementation of the Pythia6 class 29 /// \brief Implementation of the Pythia6 class
29 30
30 // ------------------------------------------- 31 // ----------------------------------------------------------------------------
31 // According to TPythia6 class from Root: 32 // According to TPythia6 class from Root:
32 // (The TPythia6 class is an interface class t 33 // (The TPythia6 class is an interface class to F77 routines in Pythia6 //
33 // CERNLIB event generators, written by T.Sjos << 34 // CERNLIB event generators, written by T.Sjostrand.)
34 // http://root.cern.ch/ 35 // http://root.cern.ch/
35 // see http://root.cern.ch/root/License.html 36 // see http://root.cern.ch/root/License.html
36 // 37 //
37 // The complete Pythia6 documentation can be f 38 // The complete Pythia6 documentation can be found at:
38 // http://home.thep.lu.se/~torbjorn/pythiaaux/ 39 // http://home.thep.lu.se/~torbjorn/pythiaaux/recent.html
39 // ------------------------------------------- 40 // ----------------------------------------------------------------------------
40 41
41 // ******************************************* 42 // ******************************************************************************
42 // ******************************************* 43 // ******************************************************************************
43 // ** 44 // ** **
44 // ** 45 // ** **
45 // ** *......* W 46 // ** *......* Welcome to the Lund Monte Carlo! **
46 // ** *:::!!:::::::::::* 47 // ** *:::!!:::::::::::* **
47 // ** *::::::!!::::::::::::::* P 48 // ** *::::::!!::::::::::::::* PPP Y Y TTTTT H H III A **
48 // ** *::::::::!!::::::::::::::::* P 49 // ** *::::::::!!::::::::::::::::* P P Y Y T H H I A A **
49 // ** *:::::::::!!:::::::::::::::::* P 50 // ** *:::::::::!!:::::::::::::::::* PPP Y T HHHHH I AAAAA **
50 // ** *:::::::::!!:::::::::::::::::* P 51 // ** *:::::::::!!:::::::::::::::::* P Y T H H I A A **
51 // ** *::::::::!!::::::::::::::::*! P 52 // ** *::::::::!!::::::::::::::::*! P Y T H H III A A **
52 // ** *::::::!!::::::::::::::* !! 53 // ** *::::::!!::::::::::::::* !! **
53 // ** !! *:::!!:::::::::::* !! T 54 // ** !! *:::!!:::::::::::* !! This is PYTHIA version 6.418 **
54 // ** !! !* -><- * !! L 55 // ** !! !* -><- * !! Last date of change: 9 Jun 2008 **
55 // ** !! !! !! 56 // ** !! !! !! **
56 // ** !! !! !! N 57 // ** !! !! !! Now is 0 Jan 2000 at 0:00:00 **
57 // ** !! !! 58 // ** !! !! **
58 // ** !! lh !! D 59 // ** !! lh !! Disclaimer: this program comes **
59 // ** !! !! w 60 // ** !! !! without any guarantees. Beware **
60 // ** !! hh !! o 61 // ** !! hh !! of errors and use common sense **
61 // ** !! ll !! w 62 // ** !! ll !! when interpreting results. **
62 // ** !! !! 63 // ** !! !! **
63 // ** !! C 64 // ** !! Copyright T. Sjostrand (2008) **
64 // ** 65 // ** **
65 // ** An archive of program versions and docum 66 // ** An archive of program versions and documentation is found on the web: **
66 // ** http://www.thep.lu.se/~torbjorn/Pythia.h 67 // ** http://www.thep.lu.se/~torbjorn/Pythia.html **
67 // ** 68 // ** **
68 // ** When you cite this program, the official 69 // ** When you cite this program, the official reference is to the 6.4 manual: **
69 // ** T. Sjostrand, S. Mrenna and P. Skands, J 70 // ** T. Sjostrand, S. Mrenna and P. Skands, JHEP05 (2006) 026 **
70 // ** (LU TP 06-13, FERMILAB-PUB-06-052-CD-T) 71 // ** (LU TP 06-13, FERMILAB-PUB-06-052-CD-T) [hep-ph/0603175]. **
71 // ** 72 // ** **
72 // ** Also remember that the program, to a lar 73 // ** Also remember that the program, to a large extent, represents original **
73 // ** physics research. Other publications of 74 // ** physics research. Other publications of special relevance to your **
74 // ** studies may therefore deserve separate m 75 // ** studies may therefore deserve separate mention. **
75 // ** 76 // ** **
76 // ** Main author: Torbjorn Sjostrand; Departm 77 // ** Main author: Torbjorn Sjostrand; Department of Theoretical Physics, **
77 // ** Lund University, Solvegatan 14A, S-223 78 // ** Lund University, Solvegatan 14A, S-223 62 Lund, Sweden; **
78 // ** phone: + 46 - 46 - 222 48 16; e-mail: 79 // ** phone: + 46 - 46 - 222 48 16; e-mail: torbjorn@thep.lu.se **
79 // ** Author: Stephen Mrenna; Computing Divisi 80 // ** Author: Stephen Mrenna; Computing Division, GDS Group, **
80 // ** Fermi National Accelerator Laboratory, 81 // ** Fermi National Accelerator Laboratory, MS 234, Batavia, IL 60510, USA; **
81 // ** phone: + 1 - 630 - 840 - 2556; e-mail: 82 // ** phone: + 1 - 630 - 840 - 2556; e-mail: mrenna@fnal.gov **
82 // ** Author: Peter Skands; Theoretical Physic 83 // ** Author: Peter Skands; Theoretical Physics Department, **
83 // ** Fermi National Accelerator Laboratory, 84 // ** Fermi National Accelerator Laboratory, MS 106, Batavia, IL 60510, USA; **
84 // ** and CERN/PH, CH-1211 Geneva, Switzerla 85 // ** and CERN/PH, CH-1211 Geneva, Switzerland; **
85 // ** phone: + 41 - 22 - 767 24 59; e-mail: 86 // ** phone: + 41 - 22 - 767 24 59; e-mail: skands@fnal.gov **
86 // ** 87 // ** **
87 // ** 88 // ** **
88 // ******************************************* 89 // ******************************************************************************
89 90
90 #include "Pythia6.hh" 91 #include "Pythia6.hh"
91 92
>> 93 #include <iostream>
92 #include <cstdlib> 94 #include <cstdlib>
93 #include <cstring> 95 #include <cstring>
94 #include <iostream> <<
95 96
96 #ifndef WIN32 97 #ifndef WIN32
97 # define pycomp pycomp_ << 98 # define pycomp pycomp_
98 # define py1ent py1ent_ << 99 # define py1ent py1ent_
99 # define type_of_call << 100 # define type_of_call
100 #else 101 #else
101 # define pycomp PYCOMP << 102 # define pycomp PYCOMP
102 # define py1ent PY1ENT << 103 # define py1ent PY1ENT
103 # define type_of_call _stdcall << 104 # define type_of_call _stdcall
104 #endif 105 #endif
105 106
106 // pythia6 functions << 107 extern "C" {
107 extern "C" << 108 int type_of_call pycomp(int *kf);
108 { <<
109 int type_of_call pycomp(int* kf); <<
110 void type_of_call py1ent(int&, int&, double& 109 void type_of_call py1ent(int&, int&, double&, double&, double&);
111 void* pythia6_common_address(const char*); << 110 void* pythia6_common_address(const char*);
112 } 111 }
113 112
114 // Direct declaration of pythia6 common blocks << 113 Pythia6* Pythia6::fgInstance = 0;
115 // extern "C" { <<
116 // extern Pyjets_t pyjets_; <<
117 // extern Pydat1_t pydat1_; <<
118 // extern Pydat3_t pydat3_; <<
119 // } <<
120 <<
121 Pythia6* Pythia6::fgInstance = 0; <<
122 114
123 //....oooOO0OOooo........oooOO0OOooo........oo 115 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
124 116
125 Pythia6* Pythia6::Instance() << 117 Pythia6* Pythia6::Instance()
126 { 118 {
127 /// Static access method << 119 /// Static access method
128 120
129 if (!fgInstance) fgInstance = new Pythia6(); << 121 if ( ! fgInstance ) fgInstance = new Pythia6();
130 122
131 return fgInstance; << 123 return fgInstance;
132 } 124 }
133 125
134 //....oooOO0OOooo........oooOO0OOooo........oo 126 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
135 127
136 Pythia6::Pythia6() : fParticles(0), fPyjets(0) << 128 Pythia6::Pythia6()
>> 129 : fParticles(0),
>> 130 fPyjets(0),
>> 131 fPydat1(0),
>> 132 fPydat3(0)
137 { 133 {
138 /// Pythia6 constructor: creates a vector of << 134 /// Pythia6 constructor: creates a vector of Pythia6Particle in which it will
139 /// store all particles. Note that there may << 135 /// store all particles. Note that there may be only one functional Pythia6
140 /// object at a time, so it's not use to cre << 136 /// object at a time, so it's not use to create more than one instance of it.
>> 137
>> 138 // Protect against multiple objects. All access should be via the
>> 139 // Instance member function.
>> 140 if ( fgInstance ) {
>> 141 std::cerr << "There's already an instance of Pythia6" << std::endl;
>> 142 exit (1);
>> 143 }
>> 144
>> 145 fParticles = new ParticleVector();
141 146
142 // Protect against multiple objects. All a << 147 // initialize common-blocks
143 // Instance member function. << 148 fPyjets = (Pyjets_t*) pythia6_common_address("PYJETS");
144 if (fgInstance) { << 149 fPydat1 = (Pydat1_t*) pythia6_common_address("PYDAT1");
145 std::cerr << "There's already an instance << 150 fPydat3 = (Pydat3_t*) pythia6_common_address("PYDAT3");
146 exit(1); <<
147 } <<
148 <<
149 fParticles = new ParticleVector(); <<
150 <<
151 // Initialize common-blocks <<
152 fPyjets = (Pyjets_t*)pythia6_common_address( <<
153 fPydat1 = (Pydat1_t*)pythia6_common_address( <<
154 fPydat3 = (Pydat3_t*)pythia6_common_address( <<
155 <<
156 // Alternative way to initialize common-bloc <<
157 // usind direct declaration of pythia6 commo <<
158 // fPyjets = &pyjets_; <<
159 // fPydat1 = &pydat1_; <<
160 // fPydat3 = &pydat3_; <<
161 } 151 }
162 152
163 //....oooOO0OOooo........oooOO0OOooo........oo 153 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
164 154
165 Pythia6::~Pythia6() 155 Pythia6::~Pythia6()
166 { 156 {
167 /// Destroy the object, delete and dispose a << 157 /// Destroy the object, delete and dispose all Pythia6Particles currently on
168 /// list. << 158 /// list.
169 159
170 if (fParticles) { << 160 if ( fParticles ) {
171 ParticleVector::const_iterator it; << 161 ParticleVector::const_iterator it;
172 for (it = fParticles->begin(); it != fPart << 162 for ( it = fParticles->begin(); it != fParticles->end(); it++ )
173 delete *it; << 163 delete *it;
174 delete fParticles; << 164 delete fParticles;
175 } << 165 }
176 } 166 }
177 167
178 //....oooOO0OOooo........oooOO0OOooo........oo 168 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
179 169
180 int Pythia6::Pycomp(int kf) << 170 int Pythia6::Pycomp(int kf)
181 { 171 {
182 /// Interface with fortran routine pycomp << 172 /// Interface with fortran routine pycomp
183 173
184 return pycomp(&kf); << 174 return pycomp(&kf);
185 } 175 }
186 176
187 //....oooOO0OOooo........oooOO0OOooo........oo 177 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
188 178
189 void Pythia6::Py1ent(int ip, int kf, double pe 179 void Pythia6::Py1ent(int ip, int kf, double pe, double theta, double phi)
190 { 180 {
191 /// Add one entry to the event record, i.e. << 181 /// Add one entry to the event record, i.e. either a parton or a
192 /// particle. << 182 /// particle.
193 /// << 183 ///
194 /// IP: normally line number for the part << 184 /// IP: normally line number for the parton/particle. There are two
195 /// exceptions: << 185 /// exceptions:
196 /// << 186 ///
197 /// If IP = 0: line number 1 is used << 187 /// If IP = 0: line number 1 is used and PYEXEC is called.
198 /// If IP < 0: line -IP is used, with << 188 /// If IP < 0: line -IP is used, with status code K(-IP,2)=2
199 /// rather than 1; thus a << 189 /// rather than 1; thus a parton system may be built
200 /// up by filling all but << 190 /// up by filling all but the last parton of the
201 /// system with IP < 0. << 191 /// system with IP < 0.
202 /// KF: parton/particle flavour code (PDG << 192 /// KF: parton/particle flavour code (PDG code)
203 /// PE: parton/particle energy. If PE is << 193 /// PE: parton/particle energy. If PE is smaller than the mass,
204 /// the parton/particle is taken to b << 194 /// the parton/particle is taken to be at rest.
205 /// THETA: << 195 /// THETA:
206 /// PHI: polar and azimuthal angle for the << 196 /// PHI: polar and azimuthal angle for the momentum vector of the
207 /// parton/particle. << 197 /// parton/particle.
208 198
209 py1ent(ip, kf, pe, theta, phi); << 199 py1ent(ip, kf, pe, theta, phi);
210 } 200 }
211 201
212 //....oooOO0OOooo........oooOO0OOooo........oo 202 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
213 203
214 int Pythia6::ImportParticles(ParticleVector* p 204 int Pythia6::ImportParticles(ParticleVector* particles, const char* option)
215 { 205 {
216 /// Default primary creation method. It rea << 206 /// Default primary creation method. It reads the /HEPEVT/ common block which
217 /// has been filled by the GenerateEvent me << 207 /// has been filled by the GenerateEvent method. If the event generator does
218 /// not use the HEPEVT common block, This r << 208 /// not use the HEPEVT common block, This routine has to be overloaded by
219 /// the subclasses. << 209 /// the subclasses.
220 /// The function loops on the generated par << 210 /// The function loops on the generated particles and store them in
221 /// the TClonesArray pointed by the argumen << 211 /// the TClonesArray pointed by the argument particles.
222 /// The default action is to store only the << 212 /// The default action is to store only the stable particles (ISTHEP = 1)
223 /// This can be demanded explicitly by sett << 213 /// This can be demanded explicitly by setting the option = "Final"
224 /// If the option = "All", all the particle << 214 /// If the option = "All", all the particles are stored.
225 << 215
226 if (particles == 0) return 0; << 216 if ( particles == 0 ) return 0;
227 << 217
228 ParticleVector::const_iterator it; << 218 ParticleVector::const_iterator it;
229 for (it = particles->begin(); it != particle << 219 for ( it = particles->begin(); it != particles->end(); it++ )
230 delete *it; << 220 delete *it;
231 particles->clear(); << 221 particles->clear();
232 << 222
233 int numpart = fPyjets->N; << 223 int numpart = fPyjets->N;
234 int nparts = 0; << 224 int nparts=0;
235 if (!strcmp(option, "") || !strcmp(option, " << 225 if (!strcmp(option,"") || !strcmp(option,"Final")) {
236 for (int i = 0; i < numpart; i++) { << 226 for (int i = 0; i<numpart; i++) {
237 if (fPyjets->K[0][i] == 1) { << 227
238 // << 228 if (fPyjets->K[0][i] == 1) {
239 // Use the common block values for th << 229 //
240 // << 230 // Use the common block values for the TParticle constructor
241 particles->push_back(new Pythia6Partic << 231 //
242 fPyjets->K[0][i], fPyjets->K[1][i], << 232 particles->push_back(
243 fPyjets->P[0][i], fPyjets->P[1][i], << 233 new Pythia6Particle(
244 fPyjets->V[0][i], fPyjets->V[1][i], << 234 fPyjets->K[0][i] ,
245 fPyjets->V[4][i])); << 235 fPyjets->K[1][i] ,
246 << 236 fPyjets->K[2][i] ,
247 // if(gDebug) printf("%d %d %d! ", << 237 fPyjets->K[3][i] ,
248 nparts++; << 238 fPyjets->K[4][i] ,
>> 239 fPyjets->P[0][i] ,
>> 240 fPyjets->P[1][i] ,
>> 241 fPyjets->P[2][i] ,
>> 242 fPyjets->P[3][i] ,
>> 243 fPyjets->P[4][i] ,
>> 244 fPyjets->V[0][i] ,
>> 245 fPyjets->V[1][i] ,
>> 246 fPyjets->V[2][i] ,
>> 247 fPyjets->V[3][i] ,
>> 248 fPyjets->V[4][i]));
>> 249
>> 250 // if(gDebug) printf("%d %d %d! ",i,fPyjets->K[1][i],numpart);
>> 251 nparts++;
>> 252 }
>> 253 }
>> 254 }
>> 255 else if (!strcmp(option,"All")) {
>> 256 for (int i = 0; i<numpart; i++) {
>> 257 particles->push_back(
>> 258 new Pythia6Particle(
>> 259 fPyjets->K[0][i] ,
>> 260 fPyjets->K[1][i] ,
>> 261 fPyjets->K[2][i] ,
>> 262 fPyjets->K[3][i] ,
>> 263 fPyjets->K[4][i] ,
>> 264 fPyjets->P[0][i] ,
>> 265 fPyjets->P[1][i] ,
>> 266 fPyjets->P[2][i] ,
>> 267 fPyjets->P[3][i] ,
>> 268 fPyjets->P[4][i] ,
>> 269 fPyjets->V[0][i] ,
>> 270 fPyjets->V[1][i] ,
>> 271 fPyjets->V[2][i] ,
>> 272 fPyjets->V[3][i] ,
>> 273 fPyjets->V[4][i]));
249 } 274 }
250 } << 275 nparts=numpart;
251 } << 276 }
252 else if (!strcmp(option, "All")) { <<
253 for (int i = 0; i < numpart; i++) { <<
254 particles->push_back(new Pythia6Particle <<
255 fPyjets->K[0][i], fPyjets->K[1][i], fP <<
256 fPyjets->P[0][i], fPyjets->P[1][i], fP <<
257 fPyjets->V[0][i], fPyjets->V[1][i], fP <<
258 } <<
259 nparts = numpart; <<
260 } <<
261 277
262 return nparts; << 278 return nparts;
263 } 279 }
264 280
265 //....oooOO0OOooo........oooOO0OOooo........oo 281 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
266 282