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2d8d4543 | 1 | // definition of c++ Class THerwig6 to be used in ROOT |
2 | // this is a c++ interface to the F77 Herwig6 program | |
3 | // author: j. g. contreras jgcn@moni.mda.cinvestav.mx | |
4 | // date: december 22, 2000 | |
884ccf6a | 5 | // Class THerwig6 is an interface to the Herwig program |
6 | // | |
7 | // C----------------------------------------------------------------------- | |
8 | // C H E R W I G | |
9 | // C | |
10 | // C a Monte Carlo event generator for simulating | |
11 | // C +---------------------------------------------------+ | |
12 | // C | Hadron Emission Reactions With Interfering Gluons | | |
13 | // C +---------------------------------------------------+ | |
14 | // C I.G. Knowles(*), G. Marchesini(+), M.H. Seymour($) and B.R. Webber(#) | |
15 | // C----------------------------------------------------------------------- | |
16 | // C with Minimal Supersymmetric Standard Model Matrix Elements by | |
17 | // C S. Moretti($) and K. Odagiri($) | |
18 | // C----------------------------------------------------------------------- | |
19 | // C R parity violating Supersymmetric Decays and Matrix Elements by | |
20 | // C P. Richardson(&) | |
21 | // C----------------------------------------------------------------------- | |
22 | // C matrix element corrections to top decay and Drell-Yan type processes | |
23 | // C by G. Corcella(+) | |
24 | // C----------------------------------------------------------------------- | |
25 | // C Deep Inelastic Scattering and Heavy Flavour Electroproduction by | |
26 | // C G. Abbiendi(@) and L. Stanco(%) | |
27 | // C----------------------------------------------------------------------- | |
28 | // C and Jet Photoproduction in Lepton-Hadron Collisions by J. Chyla(~) | |
29 | // C----------------------------------------------------------------------- | |
30 | // C(*) Department of Physics & Astronomy, University of Edinburgh | |
31 | // C(+) Dipartimento di Fisica, Universita di Milano | |
32 | // C($) Rutherford Appleton Laboratory | |
33 | // C(#) Cavendish Laboratory, Cambridge | |
34 | // C(&) Department of Physics, University of Oxford | |
35 | // C(@) Dipartimento di Fisica, Universita di Bologna | |
36 | // C(%) Dipartimento di Fisica, Universita di Padova | |
37 | // C(~) Institute of Physics, Prague | |
38 | // C----------------------------------------------------------------------- | |
39 | // C Version 6.100 - 16th December 1999 | |
40 | // C----------------------------------------------------------------------- | |
41 | // C Main reference: | |
42 | // C G.Marchesini, B.R.Webber, G.Abbiendi, I.G.Knowles, M.H.Seymour, | |
43 | // C and L.Stanco, Computer Physics Communications 67 (1992) 465. | |
44 | // C----------------------------------------------------------------------- | |
45 | // C Please send e-mail about this program to one of the authors at the | |
46 | // C following Internet addresses: | |
47 | // C I.Knowles@ed.ac.uk Giuseppe.Marchesini@mi.infn.it | |
48 | // C M.Seymour@rl.ac.uk webber@hep.phy.cam.ac.uk | |
49 | // C----------------------------------------------------------------------- | |
50 | ||
2d8d4543 | 51 | |
2d8d4543 | 52 | #include "THerwig6.h" |
53 | #include "TClonesArray.h" | |
54 | #include "TParticle.h" | |
884ccf6a | 55 | #include "TObjArray.h" |
2d8d4543 | 56 | |
57 | ||
58 | ClassImp(THerwig6) | |
59 | ||
60 | extern "C" { | |
61 | void* herwig6_common_block_address_(char*, int len); | |
62 | void herwig6_open_fortran_file_ (int* lun, char* name, int); | |
63 | void herwig6_close_fortran_file_(int* lun); | |
64 | } | |
65 | ||
66 | ||
67 | THerwig6::THerwig6() : TGenerator("Herwig6","Herwig6") { | |
68 | ||
69 | // THerwig6 constructor: creates a TClonesArray in which it will store all | |
70 | // particles. Note that there may be only one functional THerwig6 object | |
71 | // at a time, so it's not use to create more than one instance of it. | |
72 | ||
73 | delete fParticles; // was allocated as TObjArray in TGenerator | |
74 | ||
75 | fParticles = new TClonesArray("TParticle",50); | |
76 | ||
77 | // initialize common-blocks | |
78 | fHepevt = (Hepevt_t*) herwig6_common_block_address_((char*)"HEPEVT",6); | |
79 | fHwbeam = (Hwbeam_t*) herwig6_common_block_address_((char*)"HWBEAM",6); | |
80 | fHwbmch = (Hwbmch_t*) herwig6_common_block_address_((char*)"HWBMCH",6); | |
81 | fHwproc = (Hwproc_t*) herwig6_common_block_address_((char*)"HWPROC",6); | |
82 | fHwpram = (Hwpram_t*) herwig6_common_block_address_((char*)"HWPRAM",6); | |
83 | fHwprch = (Hwprch_t*) herwig6_common_block_address_((char*)"HWPRCH",6); | |
84 | fHwpart = (Hwpart_t*) herwig6_common_block_address_((char*)"HWPART",6); | |
85 | fHwparp = (Hwparp_t*) herwig6_common_block_address_((char*)"HWPARP",6); | |
86 | fHwbosc = (Hwbosc_t*) herwig6_common_block_address_((char*)"HWBOSC",6); | |
87 | fHwparc = (Hwparc_t*) herwig6_common_block_address_((char*)"HWPARC",6); | |
88 | fHwbrch = (Hwbrch_t*) herwig6_common_block_address_((char*)"HWBRCH",6); | |
89 | fHwevnt = (Hwevnt_t*) herwig6_common_block_address_((char*)"HWEVNT",6); | |
90 | fHwhard = (Hwhard_t*) herwig6_common_block_address_((char*)"HWHARD",6); | |
91 | fHwprop = (Hwprop_t*) herwig6_common_block_address_((char*)"HWPROP",6); | |
92 | fHwunam = (Hwunam_t*) herwig6_common_block_address_((char*)"HWUNAM",6); | |
93 | fHwupdt = (Hwupdt_t*) herwig6_common_block_address_((char*)"HWUPDT",6); | |
94 | fHwuwts = (Hwuwts_t*) herwig6_common_block_address_((char*)"HWUWTS",6); | |
95 | fHwuclu = (Hwuclu_t*) herwig6_common_block_address_((char*)"HWUCLU",6); | |
96 | fHwdist = (Hwdist_t*) herwig6_common_block_address_((char*)"HWDIST",6); | |
97 | fHwqdks = (Hwqdks_t*) herwig6_common_block_address_((char*)"HWQDKS",6); | |
98 | fHwusud = (Hwusud_t*) herwig6_common_block_address_((char*)"HWUSUD",6); | |
99 | fHwsusy = (Hwsusy_t*) herwig6_common_block_address_((char*)"HWSUSY",6); | |
100 | fHwrpar = (Hwrpar_t*) herwig6_common_block_address_((char*)"HWRPAR",6); | |
101 | fHwminb = (Hwminb_t*) herwig6_common_block_address_((char*)"HWMINB",6); | |
102 | fHwclus = (Hwclus_t*) herwig6_common_block_address_((char*)"HWCLUS",6); | |
103 | } | |
104 | ||
105 | //------------------------------------------------------------------------------ | |
106 | THerwig6::~THerwig6() | |
107 | { | |
108 | // Destroys the object, deletes and disposes all TParticles currently on list. | |
109 | ||
110 | if (fParticles) { | |
111 | fParticles->Delete(); | |
112 | delete fParticles; | |
113 | fParticles = 0; | |
114 | } | |
115 | } | |
116 | ||
117 | //______________________________________________________________________________ | |
118 | void THerwig6::GenerateEvent() | |
119 | { | |
120 | ||
121 | //initialize event | |
122 | hwuine_(); | |
123 | // generate hard subprocess | |
124 | hwepro_(); | |
125 | // generate parton cascades | |
126 | hwbgen_(); | |
127 | // do heavy objects decay | |
128 | hwdhob_(); | |
129 | // do cluster formation | |
130 | hwcfor_(); | |
131 | // do cluster decays | |
132 | hwcdec_(); | |
133 | // do unstable particle decays | |
134 | hwdhad_(); | |
135 | // do heavy flavor hadrons decay | |
136 | hwdhvy_(); | |
137 | // add soft underlying event | |
138 | hwmevt_(); | |
139 | // finish event | |
140 | hwufne_(); | |
141 | } | |
142 | ||
143 | //______________________________________________________________________________ | |
144 | void THerwig6::OpenFortranFile(int lun, char* name) { | |
145 | herwig6_open_fortran_file_(&lun, name, strlen(name)); | |
146 | } | |
147 | ||
148 | //______________________________________________________________________________ | |
149 | void THerwig6::CloseFortranFile(int lun) { | |
150 | herwig6_close_fortran_file_(&lun); | |
151 | } | |
152 | ||
153 | void THerwig6::Initialize(const char *beam, const char *target, double pbeam1, double pbeam2, int iproc) | |
154 | ||
155 | { | |
156 | // perform the initialization for Herwig6 | |
157 | // sets correct title. | |
158 | // after calling this method all parameters are set to their default | |
159 | // values. If you want to modify any parameter you have to set the new | |
160 | // value after calling Initialize and before PrepareRun. | |
161 | ||
162 | char cbeam[8]; | |
163 | strncpy(cbeam,beam,8); | |
164 | char ctarget[8]; | |
165 | strncpy(ctarget,target,8); | |
166 | printf("\n Initializing Herwig !! \n"); | |
167 | if ( (!strncmp(beam, "E+" ,2)) && | |
168 | (!strncmp(beam, "E-" ,2)) && | |
169 | (!strncmp(beam, "MU+" ,3)) && | |
170 | (!strncmp(beam, "MU-" ,3)) && | |
171 | (!strncmp(beam, "NUE" ,3)) && | |
172 | (!strncmp(beam, "NUEB" ,4)) && | |
173 | (!strncmp(beam, "NUMU" ,4)) && | |
174 | (!strncmp(beam, "NMUB" ,4)) && | |
175 | (!strncmp(beam, "NTAU" ,4)) && | |
176 | (!strncmp(beam, "NTAB" ,4)) && | |
177 | (!strncmp(beam, "GAMA" ,4)) && | |
178 | (!strncmp(beam, "P ",8)) && | |
179 | (!strncmp(beam, "PBAR ",8)) && | |
180 | (!strncmp(beam, "N" ,1)) && | |
181 | (!strncmp(beam, "NBAR" ,4)) && | |
182 | (!strncmp(beam, "PI+" ,3)) && | |
183 | (!strncmp(beam, "PI-" ,3)) ) { | |
184 | printf("WARNING! In THerwig6:Initialize():\n"); | |
185 | printf(" specified beam=%s is unrecognized .\n",beam); | |
186 | printf(" resetting to \"P\" ."); | |
187 | sprintf(cbeam,"P"); | |
188 | } | |
189 | ||
190 | if ( (!strncmp(target, "E+" ,2)) && | |
191 | (!strncmp(target, "E-" ,2)) && | |
192 | (!strncmp(target, "MU+" ,3)) && | |
193 | (!strncmp(target, "MU-" ,3)) && | |
194 | (!strncmp(target, "NUE" ,3)) && | |
195 | (!strncmp(target, "NUEB" ,4)) && | |
196 | (!strncmp(target, "NUMU" ,4)) && | |
197 | (!strncmp(target, "NMUB" ,4)) && | |
198 | (!strncmp(target, "NTAU" ,4)) && | |
199 | (!strncmp(target, "NTAB" ,4)) && | |
200 | (!strncmp(target, "GAMA" ,4)) && | |
201 | (!strncmp(target, "P ",8)) && | |
202 | (!strncmp(target, "PBAR ",8)) && | |
203 | (!strncmp(target, "N" ,1)) && | |
204 | (!strncmp(target, "NBAR" ,4)) && | |
205 | (!strncmp(target, "PI+" ,3)) && | |
206 | (!strncmp(target, "PI-" ,3)) ) { | |
207 | printf("WARNING! In THerwig6:Initialize():\n"); | |
208 | printf(" specified target=%s is unrecognized .\n",target); | |
209 | printf(" resetting to \"P\" ."); | |
210 | sprintf(ctarget,"P"); | |
211 | } | |
212 | ||
213 | // initialization: | |
214 | // type of beams | |
215 | strncpy(fHwbmch->PART1,beam,8); | |
216 | strncpy(fHwbmch->PART2,target,8); | |
217 | // momentum of beams | |
218 | fHwproc->PBEAM1=pbeam1; | |
219 | fHwproc->PBEAM2=pbeam2; | |
220 | // process to generate | |
221 | fHwproc->IPROC=iproc; | |
222 | // not used in the class definition | |
223 | fHwproc->MAXEV=1; | |
224 | ||
225 | // reset all parameters | |
226 | hwigin_(); | |
227 | ||
228 | // set correct title | |
229 | char atitle[132]; | |
230 | double win=pbeam1+pbeam2; | |
231 | printf("\n %s - %s at %g GeV",beam,target,win); | |
232 | sprintf(atitle,"%s-%s at %g GeV",cbeam,ctarget,win); | |
233 | SetTitle(atitle); | |
234 | } | |
235 | ||
236 | void THerwig6::PrepareRun() | |
237 | { | |
238 | // compute parameter dependent constants | |
239 | hwuinc_(); | |
240 | // initialize elementary processes | |
241 | hweini_(); | |
242 | } | |
243 | ||
244 | //______________________________________________________________________________ | |
245 | TObjArray* THerwig6::ImportParticles(Option_t *option) | |
246 | { | |
247 | // | |
248 | // Default primary creation method. It reads the /HEPEVT/ common block which | |
249 | // has been filled by the GenerateEvent method. If the event generator does | |
250 | // not use the HEPEVT common block, This routine has to be overloaded by | |
251 | // the subclasses. | |
252 | // The default action is to store only the stable particles (ISTHEP = 1) | |
253 | // This can be demanded explicitly by setting the option = "Final" | |
254 | // If the option = "All", all the particles are stored. | |
255 | // | |
256 | fParticles->Clear(); | |
257 | Int_t numpart = fHepevt->NHEP; | |
258 | TClonesArray &a = *((TClonesArray*)fParticles); | |
259 | if (!strcmp(option,"") || !strcmp(option,"Final")) { | |
260 | for (Int_t i = 0; i<=numpart; i++) { | |
261 | if (fHepevt->ISTHEP[i] == 1) { | |
262 | // | |
263 | // Use the common block values for the TParticle constructor | |
264 | // | |
265 | new(a[i]) TParticle( | |
266 | fHepevt->IDHEP[i], | |
267 | fHepevt->ISTHEP[i], | |
268 | fHepevt->JMOHEP[i][0]-1, | |
269 | fHepevt->JMOHEP[i][1]-1, | |
270 | fHepevt->JDAHEP[i][0]-1, | |
271 | fHepevt->JDAHEP[i][1]-1, | |
272 | ||
273 | fHepevt->PHEP[i][0], | |
274 | fHepevt->PHEP[i][1], | |
275 | fHepevt->PHEP[i][2], | |
276 | fHepevt->PHEP[i][3], | |
277 | fHepevt->VHEP[i][0], | |
278 | fHepevt->VHEP[i][1], | |
279 | fHepevt->VHEP[i][2], | |
280 | fHepevt->VHEP[i][3]); | |
281 | } | |
282 | } | |
283 | } | |
284 | else if (!strcmp(option,"All")) { | |
285 | for (Int_t i = 0; i<=numpart; i++) { | |
286 | new(a[i]) TParticle( | |
287 | fHepevt->IDHEP[i], | |
288 | fHepevt->ISTHEP[i], | |
289 | fHepevt->JMOHEP[i][0]-1, | |
290 | fHepevt->JMOHEP[i][1]-1, | |
291 | fHepevt->JDAHEP[i][0]-1, | |
292 | fHepevt->JDAHEP[i][1]-1, | |
293 | ||
294 | fHepevt->PHEP[i][0], | |
295 | fHepevt->PHEP[i][1], | |
296 | fHepevt->PHEP[i][2], | |
297 | fHepevt->PHEP[i][3], | |
298 | fHepevt->VHEP[i][0], | |
299 | fHepevt->VHEP[i][1], | |
300 | fHepevt->VHEP[i][2], | |
301 | fHepevt->VHEP[i][3]); | |
302 | } | |
303 | } | |
304 | return fParticles; | |
305 | } | |
306 | ||
307 | //______________________________________________________________________________ | |
308 | Int_t THerwig6::ImportParticles(TClonesArray *particles, Option_t *option) | |
309 | { | |
310 | // | |
311 | // Default primary creation method. It reads the /HEPEVT/ common block which | |
312 | // has been filled by the GenerateEvent method. If the event generator does | |
313 | // not use the HEPEVT common block, This routine has to be overloaded by | |
314 | // the subclasses. | |
315 | // The function loops on the generated particles and store them in | |
316 | // the TClonesArray pointed by the argument particles. | |
317 | // The default action is to store only the stable particles (ISTHEP = 1) | |
318 | // This can be demanded explicitly by setting the option = "Final" | |
319 | // If the option = "All", all the particles are stored. | |
320 | // | |
321 | if (particles == 0) return 0; | |
884ccf6a | 322 | TClonesArray &refParticles = *particles; |
323 | refParticles.Clear(); | |
2d8d4543 | 324 | Int_t numpart = fHepevt->NHEP; |
325 | if (!strcmp(option,"") || !strcmp(option,"Final")) { | |
326 | for (Int_t i = 0; i< numpart; i++) { | |
327 | if (fHepevt->ISTHEP[i] == 1) { | |
328 | // | |
329 | // Use the common block values for the TParticle constructor | |
330 | // | |
884ccf6a | 331 | new(refParticles[i]) TParticle( |
2d8d4543 | 332 | fHepevt->IDHEP[i], |
333 | fHepevt->ISTHEP[i], | |
334 | fHepevt->JMOHEP[i][0]-1, | |
335 | fHepevt->JMOHEP[i][1]-1, | |
336 | fHepevt->JDAHEP[i][0]-1, | |
337 | fHepevt->JDAHEP[i][1]-1, | |
338 | ||
339 | fHepevt->PHEP[i][0], | |
340 | fHepevt->PHEP[i][1], | |
341 | fHepevt->PHEP[i][2], | |
342 | fHepevt->PHEP[i][3], | |
343 | fHepevt->VHEP[i][0], | |
344 | fHepevt->VHEP[i][1], | |
345 | fHepevt->VHEP[i][2], | |
346 | fHepevt->VHEP[i][3]); | |
347 | } | |
348 | } | |
349 | } | |
350 | else if (!strcmp(option,"All")) { | |
351 | for (Int_t i = 0; i< numpart; i++) { | |
884ccf6a | 352 | new(refParticles[i]) TParticle( |
2d8d4543 | 353 | fHepevt->IDHEP[i], |
354 | fHepevt->ISTHEP[i], | |
355 | fHepevt->JMOHEP[i][0]-1, | |
356 | fHepevt->JMOHEP[i][1]-1, | |
357 | fHepevt->JDAHEP[i][0]-1, | |
358 | fHepevt->JDAHEP[i][1]-1, | |
359 | ||
360 | fHepevt->PHEP[i][0], | |
361 | fHepevt->PHEP[i][1], | |
362 | fHepevt->PHEP[i][2], | |
363 | fHepevt->PHEP[i][3], | |
364 | fHepevt->VHEP[i][0], | |
365 | fHepevt->VHEP[i][1], | |
366 | fHepevt->VHEP[i][2], | |
367 | fHepevt->VHEP[i][3]); | |
368 | } | |
369 | } | |
370 | return numpart; | |
371 | } | |
372 | ||
373 | void THerwig6::Hwigin() | |
374 | { | |
375 | hwigin_(); | |
376 | } | |
377 | ||
378 | void THerwig6::Hwuinc() | |
379 | { | |
380 | hwuinc_(); | |
381 | } | |
382 | ||
383 | void THerwig6::Hwusta(char* name) | |
384 | ||
385 | { | |
386 | hwusta_(name,8); | |
387 | } | |
388 | ||
389 | void THerwig6::Hweini() | |
390 | ||
391 | { | |
392 | hweini_(); | |
393 | } | |
394 | ||
395 | void THerwig6::Hwuine() | |
396 | ||
397 | { | |
398 | hwuine_(); | |
399 | } | |
400 | ||
401 | void THerwig6::Hwepro() | |
402 | ||
403 | { | |
404 | hwepro_(); | |
405 | } | |
406 | ||
407 | void THerwig6::Hwbgen() | |
408 | ||
409 | { | |
410 | hwbgen_(); | |
411 | } | |
412 | ||
413 | void THerwig6::Hwdhob() | |
414 | ||
415 | { | |
416 | hwdhob_(); | |
417 | } | |
418 | ||
419 | void THerwig6::Hwcfor() | |
420 | ||
421 | { | |
422 | hwcfor_(); | |
423 | } | |
424 | ||
425 | void THerwig6::Hwcdec() | |
426 | ||
427 | { | |
428 | hwcdec_(); | |
429 | } | |
430 | ||
431 | void THerwig6::Hwdhad() | |
432 | ||
433 | { | |
434 | hwdhad_(); | |
435 | } | |
436 | ||
437 | void THerwig6::Hwdhvy() | |
438 | ||
439 | { | |
440 | hwdhvy_(); | |
441 | } | |
442 | ||
443 | void THerwig6::Hwmevt() | |
444 | ||
445 | { | |
446 | hwmevt_(); | |
447 | } | |
448 | ||
449 | void THerwig6::Hwufne() | |
450 | ||
451 | { | |
452 | hwufne_(); | |
453 | } | |
454 | ||
455 | void THerwig6::Hwefin() | |
456 | ||
457 | { | |
458 | hwefin_(); | |
459 | } | |
460 | ||
461 | void THerwig6::SetupTest() | |
462 | { | |
463 | // exampe of running herwig and generating one event | |
464 | // after changing some options | |
465 | Initialize("P","PBAR",900.,900.,1500); | |
466 | // here you can set some parameters | |
467 | SetPTMIN(15.); // Min pt in hadronic jet production | |
468 | SetYJMIN(-4.); // Min jet rapidity | |
469 | SetYJMAX(4.); // Max jet rapidity | |
470 | // after you set your wished parameters | |
471 | // herwig can do its work | |
472 | PrepareRun(); | |
884ccf6a | 473 | int nEvToGenerate=1; |
474 | for (int i=0;i<nEvToGenerate;i++) | |
2d8d4543 | 475 | { |
476 | GenerateEvent(); | |
477 | // do your stuff. For ex: | |
884ccf6a | 478 | int nOfPar=GetNumberOfParticles(); // from TGenerator |
479 | for (int j=0; j<nOfPar; j++) | |
2d8d4543 | 480 | { |
481 | TParticle* p=GetParticle(j); | |
482 | // here you do whatever you want with the particle | |
483 | p->Print(); | |
484 | }; | |
485 | }; | |
486 | } | |
487 | ||
488 | ||
489 | ||
490 | ||
491 |