1 //////////////////////////////////////////////////////////////////////////
2 // Matt.Dobbs@Cern.CH, October 2002
3 // Herwig 6.400 IO class
4 //////////////////////////////////////////////////////////////////////////
6 #include "HepMC/IO_HERWIG.h"
7 #include "HepMC/GenEvent.h"
8 #include <cstdio> // needed for formatted output using sprintf
12 IO_HERWIG::IO_HERWIG() : m_trust_mothers_before_daughters(false),
13 m_trust_both_mothers_and_daughters(true),
14 m_print_inconsistency_errors(true),
15 m_no_gaps_in_barcodes(true),
16 m_herwig_to_pdg_id(100,0)
18 // These arrays are copied from Lynn Garren's stdhep 5.01-5.06.
19 // see http://cepa.fnal.gov/psm/stdhep/
20 // Translation from HERWIG particle ID's to PDG particle ID's.
21 m_herwig_to_pdg_id[1] =1;
22 m_herwig_to_pdg_id[2] =2;
23 m_herwig_to_pdg_id[3] =3;
24 m_herwig_to_pdg_id[4] =4;
25 m_herwig_to_pdg_id[5] =5;
26 m_herwig_to_pdg_id[6] =6;
27 m_herwig_to_pdg_id[7] =7;
28 m_herwig_to_pdg_id[8] =8;
30 m_herwig_to_pdg_id[11] =11;
31 m_herwig_to_pdg_id[12] =12;
32 m_herwig_to_pdg_id[13] =13;
33 m_herwig_to_pdg_id[14] =14;
34 m_herwig_to_pdg_id[15] =15;
35 m_herwig_to_pdg_id[16] =16;
37 m_herwig_to_pdg_id[21] =21;
38 m_herwig_to_pdg_id[22] =22;
39 m_herwig_to_pdg_id[23] =23;
40 m_herwig_to_pdg_id[24] =24;
41 m_herwig_to_pdg_id[25] =25;
42 m_herwig_to_pdg_id[26] =51; // <-- H_L0 (redundant with h0(25))
44 m_herwig_to_pdg_id[32] =32;
45 m_herwig_to_pdg_id[35] =35;
46 m_herwig_to_pdg_id[36] =36;
47 m_herwig_to_pdg_id[37] =37;
48 m_herwig_to_pdg_id[39] =39;
50 m_herwig_to_pdg_id[40] =40; //Charybdis Black Hole
52 m_herwig_to_pdg_id[81] =81;
53 m_herwig_to_pdg_id[82] =82;
54 m_herwig_to_pdg_id[83] =83;
55 m_herwig_to_pdg_id[84] =84;
56 m_herwig_to_pdg_id[85] =85;
57 m_herwig_to_pdg_id[86] =86;
58 m_herwig_to_pdg_id[87] =87;
59 m_herwig_to_pdg_id[88] =88;
60 m_herwig_to_pdg_id[89] =89;
61 m_herwig_to_pdg_id[90] =90;
63 m_herwig_to_pdg_id[91] =91;
64 m_herwig_to_pdg_id[92] =92;
65 m_herwig_to_pdg_id[93] =93;
66 m_herwig_to_pdg_id[94] =94;
67 m_herwig_to_pdg_id[95] =95;
68 m_herwig_to_pdg_id[96] =96;
69 m_herwig_to_pdg_id[97] =97;
70 m_herwig_to_pdg_id[98] =9920022; // <-- remnant photon
71 m_herwig_to_pdg_id[99] =9922212; // <-- remnant nucleon
73 // These particle ID's have no antiparticle, so aren't allowed.
74 m_no_antiparticles.insert(-21);
75 m_no_antiparticles.insert(-22);
76 m_no_antiparticles.insert(-23);
77 m_no_antiparticles.insert(-25);
78 m_no_antiparticles.insert(-51);
79 m_no_antiparticles.insert(-35);
80 m_no_antiparticles.insert(-36);
83 IO_HERWIG::~IO_HERWIG(){}
85 void IO_HERWIG::print( std::ostream& ostr ) const {
86 ostr << "IO_HERWIG: reads an event from the FORTRAN Herwig HEPEVT "
88 << " trust_mothers_before_daughters = "
89 << m_trust_mothers_before_daughters
90 << " trust_both_mothers_and_daughters = "
91 << m_trust_both_mothers_and_daughters
92 << " print_inconsistency_errors = "
93 << m_print_inconsistency_errors << std::endl;
96 bool IO_HERWIG::fill_next_event( GenEvent* evt ) {
97 /// read one event from the Herwig HEPEVT common block and fill GenEvent
98 /// return T/F =success/failure
100 // 0. Test that evt pointer is not null and set event number
103 << "IO_HERWIG::fill_next_event error - passed null event."
108 // 1. First we have to fix the HEPEVT input, which is all mucked up for
112 evt->set_event_number( HEPEVT_Wrapper::event_number() );
113 // Herwig units are GeV and mm
114 // It would be nice to set the units right here,
115 // but this could cause problems with existing code that
116 // might convert GeV to MeV without calling the appropriate HepMC method
119 // 2. create a particle instance for each HEPEVT entry and fill a map
120 // create a vector which maps from the HEPEVT particle index to the
121 // GenParticle address
122 // (+1 in size accounts for hepevt_particle[0] which is unfilled)
123 std::vector<GenParticle*> hepevt_particle(
124 HEPEVT_Wrapper::number_entries()+1 );
125 hepevt_particle[0] = 0;
126 for ( int i1 = 1; i1 <= HEPEVT_Wrapper::number_entries(); ++i1 ) {
127 hepevt_particle[i1] = build_particle(i1);
129 std::set<GenVertex*> new_vertices;
131 // Here we assume that the first two particles in the list
132 // are the incoming beam particles.
133 // Best make sure this is done before any rearranging...
134 evt->set_beam_particles( hepevt_particle[1], hepevt_particle[2] );
136 // 3. We need to take special care with the hard process
137 // vertex. The problem we are trying to avoid is when the
138 // partons entering the hard process also have daughters from
139 // the parton shower. When this happens, each one can get its
140 // own decay vertex, making it difficult to join them
141 // later. We handle it by joining them together first, then
142 // the other daughters get added on later.
143 // Find the partons entering the hard vertex (status codes 121, 122).
146 for ( int i = 1; i <=HEPEVT_Wrapper::number_entries(); i++ ) {
147 if ( HEPEVT_Wrapper::status(i)==121 ) index_121=i;
148 if ( HEPEVT_Wrapper::status(i)==122 ) index_122=i;
149 if ( index_121!=0 && index_122!=0 ) break;
151 if ( index_121 && index_122 ) {
152 GenVertex* hard_vtx = new GenVertex();
153 hard_vtx->add_particle_in( hepevt_particle[index_121] );
154 hard_vtx->add_particle_in( hepevt_particle[index_122] );
155 // evt->add_vertex( hard_vtx ); // not necessary, its done in
156 // set_signal_process_vertex
157 //BPK - Atlas -> index_hard retained if it is a boson
159 for ( int i = 1; i <=HEPEVT_Wrapper::number_entries(); i++ ) {
160 if ( HEPEVT_Wrapper::status(i)==120 ) index_hard=i;
161 if ( index_hard!=0 ) break;
164 if ( index_hard!=0) {
165 hard_vtx->add_particle_out( hepevt_particle[index_hard] );
166 GenVertex* hard_vtx2 = new GenVertex();
167 hard_vtx2->add_particle_in( hepevt_particle[index_hard] );
168 for ( int i = 1; i <= HEPEVT_Wrapper::number_entries(); ++i ) {
169 if ( HEPEVT_Wrapper::first_parent(i)==index_hard ) {
170 hard_vtx2->add_particle_out( hepevt_particle[i] );
173 evt->set_signal_process_vertex( hard_vtx );
174 evt->set_signal_process_vertex( hard_vtx2 );
177 evt->set_signal_process_vertex( hard_vtx );
182 // 4. loop over HEPEVT particles AGAIN, this time creating vertices
183 for ( int i = 1; i <= HEPEVT_Wrapper::number_entries(); ++i ) {
184 // We go through and build EITHER the production or decay
185 // vertex for each entry in hepevt, depending on the switch
186 // m_trust_mothers_before_daughters (new 2001-02-28)
187 // Note: since the HEPEVT pointers are bi-directional, it is
188 /// sufficient to do one or the other.
190 // 3. Build the production_vertex (if necessary)
191 if ( m_trust_mothers_before_daughters ||
192 m_trust_both_mothers_and_daughters ) {
193 build_production_vertex( i, hepevt_particle, evt );
196 // 4. Build the end_vertex (if necessary)
197 // Identical steps as for production vertex
198 if ( !m_trust_mothers_before_daughters ||
199 m_trust_both_mothers_and_daughters ) {
200 build_end_vertex( i, hepevt_particle, evt );
204 // handle the case of particles in HEPEVT which come from nowhere -
205 // i.e. particles without mothers or daughters.
206 // These particles need to be attached to a vertex, or else they
207 // will never become part of the event. check for this situation.
208 for ( int i3 = 1; i3 <= HEPEVT_Wrapper::number_entries(); ++i3 ) {
209 // Herwig also has some non-physical entries in HEPEVT
210 // like CMS, HARD, and CONE. These are flagged by
211 // repair_hepevt by making their status and id zero. We
212 // delete those particles here.
213 if ( hepevt_particle[i3] && !hepevt_particle[i3]->parent_event()
214 && !hepevt_particle[i3]->pdg_id()
215 && !hepevt_particle[i3]->status() ) {
216 //std::cout << "IO_HERWIG::fill_next_event is deleting null "
217 // << "particle" << std::endl;
218 //hepevt_particle[i3]->print();
219 delete hepevt_particle[i3];
220 } else if ( hepevt_particle[i3] &&
221 !hepevt_particle[i3]->end_vertex() &&
222 !hepevt_particle[i3]->production_vertex() ) {
223 GenVertex* prod_vtx = new GenVertex();
224 prod_vtx->add_particle_out( hepevt_particle[i3] );
225 evt->add_vertex( prod_vtx );
231 void IO_HERWIG::build_production_vertex(int i,
232 std::vector<GenParticle*>&
236 /// for particle in HEPEVT with index i, build a production vertex
237 /// if appropriate, and add that vertex to the event
238 GenParticle* p = hepevt_particle[i];
239 // a. search to see if a production vertex already exists
240 int mother = HEPEVT_Wrapper::first_parent(i);
241 GenVertex* prod_vtx = p->production_vertex();
242 while ( !prod_vtx && mother > 0 ) {
243 prod_vtx = hepevt_particle[mother]->end_vertex();
244 if ( prod_vtx ) prod_vtx->add_particle_out( p );
245 // increment mother for next iteration
246 if ( ++mother > HEPEVT_Wrapper::last_parent(i) ) mother = 0;
248 // b. if no suitable production vertex exists - and the particle
249 // has atleast one mother or position information to store -
251 FourVector prod_pos( HEPEVT_Wrapper::x(i), HEPEVT_Wrapper::y(i),
252 HEPEVT_Wrapper::z(i), HEPEVT_Wrapper::t(i)
254 if ( !prod_vtx && (HEPEVT_Wrapper::number_parents(i)>0
255 || prod_pos!=FourVector(0,0,0,0)) )
257 prod_vtx = new GenVertex();
258 prod_vtx->add_particle_out( p );
259 evt->add_vertex( prod_vtx );
261 // c. if prod_vtx doesn't already have position specified, fill it
262 if ( prod_vtx && prod_vtx->position()==FourVector(0,0,0,0) ) {
263 prod_vtx->set_position( prod_pos );
265 // d. loop over mothers to make sure their end_vertices are
267 mother = HEPEVT_Wrapper::first_parent(i);
268 while ( prod_vtx && mother > 0 ) {
269 if ( !hepevt_particle[mother]->end_vertex() ) {
270 // if end vertex of the mother isn't specified, do it now
271 prod_vtx->add_particle_in( hepevt_particle[mother] );
272 } else if (hepevt_particle[mother]->end_vertex() != prod_vtx ) {
273 // problem scenario --- the mother already has a decay
274 // vertex which differs from the daughter's produciton
275 // vertex. This means there is internal
276 // inconsistency in the HEPEVT event record. Print an
278 // Note: we could provide a fix by joining the two
279 // vertices with a dummy particle if the problem
280 // arrises often with any particular generator.
281 if ( m_print_inconsistency_errors ) {
283 << "HepMC::IO_HERWIG: inconsistent mother/daugher "
284 << "information in HEPEVT event "
285 << HEPEVT_Wrapper::event_number()
286 << ". \n I recommend you try "
287 << "inspecting the event first with "
288 << "\n\tHEPEVT_Wrapper::check_hepevt_consistency()"
289 << "\n This warning can be turned off with the "
290 << "IO_HERWIG::print_inconsistency_errors switch."
292 hepevt_particle[mother]->print(std::cerr);
294 << "problem vertices are: (prod_vtx, mother)" << std::endl;
295 if ( prod_vtx ) prod_vtx->print(std::cerr);
296 hepevt_particle[mother]->end_vertex()->print(std::cerr);
299 if ( ++mother > HEPEVT_Wrapper::last_parent(i) ) mother = 0;
303 void IO_HERWIG::build_end_vertex
304 ( int i, std::vector<GenParticle*>& hepevt_particle, GenEvent* evt )
307 /// for particle in HEPEVT with index i, build an end vertex
308 /// if appropriate, and add that vertex to the event
309 // Identical steps as for build_production_vertex
310 GenParticle* p = hepevt_particle[i];
312 int daughter = HEPEVT_Wrapper::first_child(i);
313 GenVertex* end_vtx = p->end_vertex();
314 while ( !end_vtx && daughter > 0 ) {
315 end_vtx = hepevt_particle[daughter]->production_vertex();
316 if ( end_vtx ) end_vtx->add_particle_in( p );
317 if ( ++daughter > HEPEVT_Wrapper::last_child(i) ) daughter = 0;
319 // b. (different from 3c. because HEPEVT particle can not know its
321 if ( !end_vtx && HEPEVT_Wrapper::number_children(i)>0 ) {
322 end_vtx = new GenVertex();
323 end_vtx->add_particle_in( p );
324 evt->add_vertex( end_vtx );
326 // c+d. loop over daughters to make sure their production vertices
327 // point back to the current vertex.
328 // We get the vertex position from the daughter as well.
329 daughter = HEPEVT_Wrapper::first_child(i);
330 while ( end_vtx && daughter > 0 ) {
331 if ( !hepevt_particle[daughter]->production_vertex() ) {
332 // if end vertex of the mother isn't specified, do it now
333 end_vtx->add_particle_out( hepevt_particle[daughter] );
335 // 2001-03-29 M.Dobbs, fill vertex the position.
336 if ( end_vtx->position()==FourVector(0,0,0,0) ) {
337 FourVector prod_pos( HEPEVT_Wrapper::x(daughter),
338 HEPEVT_Wrapper::y(daughter),
339 HEPEVT_Wrapper::z(daughter),
340 HEPEVT_Wrapper::t(daughter)
342 if ( prod_pos != FourVector(0,0,0,0) ) {
343 end_vtx->set_position( prod_pos );
346 } else if (hepevt_particle[daughter]->production_vertex()
348 // problem scenario --- the daughter already has a prod
349 // vertex which differs from the mother's end
350 // vertex. This means there is internal
351 // inconsistency in the HEPEVT event record. Print an
353 if ( m_print_inconsistency_errors ) std::cerr
354 << "HepMC::IO_HERWIG: inconsistent mother/daugher "
355 << "information in HEPEVT event "
356 << HEPEVT_Wrapper::event_number()
357 << ". \n I recommend you try "
358 << "inspecting the event first with "
359 << "\n\tHEPEVT_Wrapper::check_hepevt_consistency()"
360 << "\n This warning can be turned off with the "
361 << "IO_HERWIG::print_inconsistency_errors switch."
364 if ( ++daughter > HEPEVT_Wrapper::last_child(i) ) daughter = 0;
366 if ( !p->end_vertex() && !p->production_vertex() ) {
367 // Added 2001-11-04, to try and handle Isajet problems.
368 build_production_vertex( i, hepevt_particle, evt );
372 GenParticle* IO_HERWIG::build_particle( int index ) {
373 /// Builds a particle object corresponding to index in HEPEVT
376 = new GenParticle( FourVector( HEPEVT_Wrapper::px(index),
377 HEPEVT_Wrapper::py(index),
378 HEPEVT_Wrapper::pz(index),
379 HEPEVT_Wrapper::e(index) ),
380 HEPEVT_Wrapper::id(index),
381 HEPEVT_Wrapper::status(index) );
382 p->setGeneratedMass( HEPEVT_Wrapper::m(index) );
383 p->suggest_barcode( index );
387 int IO_HERWIG::find_in_map( const std::map<GenParticle*,int>& m,
388 GenParticle* p) const {
389 std::map<GenParticle*,int>::const_iterator iter = m.find(p);
390 if ( iter == m.end() ) return 0;
394 void IO_HERWIG::repair_hepevt() const {
395 /// This routine takes the HEPEVT common block as used in HERWIG,
396 /// and converts it into the HEPEVT common block in the standard format
399 /// - removes the color structure, which herwig overloads
400 /// into the mother/daughter fields
401 /// - zeros extra entries for hard subprocess, etc.
404 /// Special HERWIG status codes
405 /// 101,102 colliding beam particles
406 /// 103 beam-beam collision CMS vector
407 /// 120 hard subprocess CMS vector
408 /// 121,122 hard subprocess colliding partons
409 /// 123-129 hard subprocess outgoing particles
410 /// 141-149 (ID=94) mirror image of hard subrpocess particles
413 /// Special HERWIG particle id's
416 /// 0 others with no pdg code
418 // Make sure hepvt isn't empty.
419 if ( HEPEVT_Wrapper::number_entries() <= 0 ) return;
421 // Find the index of the beam-beam collision and of the hard subprocess
422 // Later we will assume that
427 int index_collision = 0;
434 for ( int i = 1; i <=HEPEVT_Wrapper::number_entries(); i++ ) {
435 if ( HEPEVT_Wrapper::status(i)==101 ) index_101=i;
436 if ( HEPEVT_Wrapper::status(i)==102 ) index_102=i;
437 if ( HEPEVT_Wrapper::status(i)==103 ) index_collision=i;
438 if ( HEPEVT_Wrapper::status(i)==120 ) index_hard=i;
439 if ( HEPEVT_Wrapper::status(i)==121 ) index_121=i;
440 if ( HEPEVT_Wrapper::status(i)==122 ) index_122=i;
441 if ( index_collision!=0 && index_hard!=0 && index_101!=0 &&
442 index_102!=0 && index_121!=0 && index_122!=0 ) break;
445 // The mother daughter information for the hard subprocess entry (120)
446 // IS correct, whereas the information for the particles participating
447 // in the hard subprocess contains instead the color flow relationships
448 // Transfer the hard subprocess info onto the other particles
449 // in the hard subprocess.
451 // We cannot specify daughters of the incoming hard process particles
452 // because they have some daughters (their showered versions) which
453 // are not adjacent in the particle record, so we cannot properly
454 // set the daughter indices in hepevt.
456 if (index_121) HEPEVT_Wrapper::set_parents(index_121, index_101, 0 );
457 if (index_121) HEPEVT_Wrapper::set_children( index_121, 0, 0 );
458 if (index_122) HEPEVT_Wrapper::set_parents(index_122, index_102, 0 );
459 if (index_122) HEPEVT_Wrapper::set_children( index_122, 0, 0 );
461 for ( int i = HEPEVT_Wrapper::first_child(index_hard);
462 i <= HEPEVT_Wrapper::last_child(index_hard); i++ ) {
464 if (index_hard && HEPEVT_Wrapper::id(index_hard) == 0 ) {
465 HEPEVT_Wrapper::set_parents(
466 i, HEPEVT_Wrapper::first_parent(index_hard),
467 HEPEVT_Wrapper::last_parent(index_hard) );
468 //BPK -> inconsistency in HWHGUP, desc from hard vert should point to it.
469 } else if ( HEPEVT_Wrapper::first_parent(i)!=index_hard) {
470 HEPEVT_Wrapper::set_parents(i,index_hard,HEPEVT_Wrapper::last_parent(i) );
474 // When the direct descendants of the hard process are hadrons,
475 // then the 2nd child contains color flow information, and so
477 // However, if the direct descendant is status=195, then it is
478 // a non-hadron, and so the 2nd child does contain real mother
479 // daughter relationships. ( particularly relevant for H->WW,
481 // BPK - part of the inconsistency in HWHGUP problem
482 if ( HEPEVT_Wrapper::status(i) != 195 && HEPEVT_Wrapper::status(i) != 155 ) {
483 HEPEVT_Wrapper::set_children(i,HEPEVT_Wrapper::first_child(i),0);
487 // now zero the collision and hard entries.
489 if (index_hard && HEPEVT_Wrapper::id(index_hard) == 0 ) zero_hepevt_entry(index_hard);
490 if (index_hard && HEPEVT_Wrapper::id(index_collision) == 0 ) zero_hepevt_entry(index_collision);
493 // Loop over the particles individually and handle oddities
494 for ( int i=1; i <=HEPEVT_Wrapper::number_entries(); i++ ) {
496 // ----------- Fix ID codes ----------
497 // particles with ID=94 are mirror images of their mothers:
498 if ( HEPEVT_Wrapper::id(i)==94 ) {
499 HEPEVT_Wrapper::set_id(
500 i, HEPEVT_Wrapper::id( HEPEVT_Wrapper::first_parent(i) ) );
503 // ----------- fix STATUS codes ------
504 // status=100 particles are "cones" which carry only color info
506 if ( HEPEVT_Wrapper::status(i)==100 ) zero_hepevt_entry(i);
509 // NOTE: status 101,102 particles are the beam particles.
510 // status 121,129 particles are the hard subprocess particles
511 // we choose to allow the herwig particles to have herwig
512 // specific codes, and so we don't bother to change these
518 // ----------- fix some MOTHER/DAUGHTER relationships
519 // Whenever the mother points to the hard process, it is referring
520 // to a color flow, so we zero it.
521 if ( HEPEVT_Wrapper::last_parent(i)==index_hard ) {
522 HEPEVT_Wrapper::set_parents(
523 i, HEPEVT_Wrapper::first_parent(i), 0 );
526 // It makes no sense to have a mother that is younger than you are!
528 if ( HEPEVT_Wrapper::first_parent(i) >= i ) {
529 HEPEVT_Wrapper::set_parents( i, 0, 0 );
531 if ( HEPEVT_Wrapper::last_parent(i) >= i ) {
532 HEPEVT_Wrapper::set_parents(
533 i, HEPEVT_Wrapper::first_parent(i), 0 );
536 // Whenever the second mother/daughter has a lower index than the
537 // first, it means the second mother/daughter contains color
539 if ( HEPEVT_Wrapper::last_parent(i) <=
540 HEPEVT_Wrapper::first_parent(i) ) {
541 HEPEVT_Wrapper::set_parents(
542 i, HEPEVT_Wrapper::first_parent(i), 0 );
545 if ( HEPEVT_Wrapper::last_child(i) <=
546 HEPEVT_Wrapper::first_child(i) ) {
547 HEPEVT_Wrapper::set_children(
548 i, HEPEVT_Wrapper::first_child(i), 0 );
551 // The mothers & daughters of a soft centre of mass (stat=170) seem
552 // to be correct, but they are out of sequence. The information is
553 // elsewhere in the event record, so zero it.
555 if ( HEPEVT_Wrapper::status(i) == 170 ) {
556 HEPEVT_Wrapper::set_parents( i, 0, 0 );
557 HEPEVT_Wrapper::set_children( i, 0, 0 );
560 // Recognise clusters.
561 // Case 1: cluster has particle parents.
562 // Clusters normally DO point to its two
563 // correct mothers, but those 2 mothers are rarely adjacent in the
564 // event record ... so the mother information might say something
565 // like 123,48 where index123 and index48 really are the correct
566 // mothers... however the hepevt standard states that the mother
567 // pointers should give the index range. So we would have to
568 // reorder the event record and add entries if we wanted to use
569 // it. Instead we just zero the mothers, since all of that
570 // information is contained in the daughter information of the
572 // Case 2: cluster has a soft process centre of mass (stat=170)
573 // as parent. This is ok, keep it.
575 // Note if we were going directly to HepMC, then we could
576 // use this information properly!
578 if ( HEPEVT_Wrapper::id(i)==91 ) {
579 // if the cluster comes from a SOFT (id=0,stat=170)
580 if ( HEPEVT_Wrapper::status(HEPEVT_Wrapper::first_parent(i))
582 ; // In this case the mothers are ok
584 HEPEVT_Wrapper::set_parents( i, 0, 0 );
589 // ---------- Loop over the particles individually and look
590 // for mother/daughter inconsistencies.
591 // We consider a mother daughter relationship to be valid
592 // ONLy when the mother points to the daughter AND the
593 // daughter points back (true valid bidirectional
594 // pointers) OR when a one thing points to the other, but
595 // the other points to zero. If this isn't true, we zero
596 // the offending relationship.
598 for ( int i=1; i <=HEPEVT_Wrapper::number_entries(); i++ ) {
600 int ifirst = HEPEVT_Wrapper::first_parent(i);
601 int ilast = HEPEVT_Wrapper::last_parent(i);
602 if ( ilast == 0 ) ilast = HEPEVT_Wrapper::first_parent(i);
603 bool first_is_acceptable = true;
604 bool last_is_acceptable = true;
605 // check for out of range.
606 if ( ifirst>=i || ifirst<0 ) first_is_acceptable = false;
607 if ( ilast>=i || ilast<ifirst || ilast<0 )last_is_acceptable=false;
608 if ( first_is_acceptable ) {
609 for ( int j = ifirst; j<=ilast; j++ ) {
610 // these are the acceptable outcomes
611 if ( HEPEVT_Wrapper::first_child(j)==i ) {;}
613 else if ( HEPEVT_Wrapper::first_child(j) <=i &&
614 HEPEVT_Wrapper::last_child(j) >=i ) {;}
615 else if ( HEPEVT_Wrapper::first_child(j) ==0 &&
616 HEPEVT_Wrapper::last_child(j) ==0 ) {;}
619 // modified by MADobbs@lbl.gov April 21, 2003
620 // we distinguish between the first parent and all parents
622 else if (j==ifirst) { first_is_acceptable = false; break; }
623 else { last_is_acceptable = false; break; }
626 // if any one of the mothers gave a bad outcome, zero all mothers
628 // do not disconnect photons (most probably from photos)
629 if ( HEPEVT_Wrapper::id(i) == 22 && HEPEVT_Wrapper::status(i) == 1 )
630 { first_is_acceptable = true; }
632 if ( !first_is_acceptable ) {
633 HEPEVT_Wrapper::set_parents( i, 0, 0 );
634 } else if ( !last_is_acceptable ) {
635 HEPEVT_Wrapper::set_parents(i,HEPEVT_Wrapper::first_parent(i),0);
638 // Note: it's important to finish the mother loop, before
639 // starting the daughter loop ... since many mother relations
640 // will be zero'd which will validate the daughters.... i.e.,
641 // we want relationships like:
642 // IHEP ID IDPDG IST MO1 MO2 DA1 DA2
643 // 27 TQRK 6 3 26 26 30 30
644 // 30 TQRK 6 155 26 11 31 32
645 // to come out right.
647 for ( int i=1; i <=HEPEVT_Wrapper::number_entries(); i++ ) {
648 // loop over daughters
649 int ifirst = HEPEVT_Wrapper::first_child(i);
650 int ilast = HEPEVT_Wrapper::last_child(i);
651 if ( ilast==0 ) ilast = HEPEVT_Wrapper::first_child(i);
652 bool is_acceptable = true;
653 // check for out of range.
654 if ( ifirst<=i || ifirst<0 ) is_acceptable = false;
655 if ( ilast<=i || ilast<ifirst || ilast<0 ) is_acceptable = false;
656 if ( is_acceptable ) {
657 for ( int j = ifirst; j<=ilast; j++ ) {
658 // these are the acceptable outcomes
659 if ( HEPEVT_Wrapper::first_parent(j)==i ) {;}
660 else if ( HEPEVT_Wrapper::first_parent(j) <=i &&
661 HEPEVT_Wrapper::last_parent(j) >=i ) {;}
662 else if ( HEPEVT_Wrapper::first_parent(j) ==0 &&
663 HEPEVT_Wrapper::last_parent(j) ==0 ) {;}
664 else { is_acceptable = false; } // error condition
667 // if any one of the children gave a bad outcome, zero all children
668 if ( !is_acceptable ) HEPEVT_Wrapper::set_children( i, 0, 0 );
673 for ( int i=1; i <=HEPEVT_Wrapper::number_entries(); i++ ) {
674 HEPEVT_Wrapper::set_id(
675 i, translate_herwig_to_pdg_id(HEPEVT_Wrapper::id(i)) );
679 if ( m_no_gaps_in_barcodes ) remove_gaps_in_hepevt();
682 void IO_HERWIG::remove_gaps_in_hepevt() const {
683 /// in this scenario, we do not allow there to be zero-ed
684 /// entries in the HEPEVT common block, and so be reshuffle
685 /// the common block, removing the zeero-ed entries as we
686 /// go and making sure we keep the mother/daughter
687 /// relationships appropriate
688 std::vector<int> mymap(HEPEVT_Wrapper::number_entries()+1,0);
690 for ( int i=1; i <=HEPEVT_Wrapper::number_entries(); i++ ) {
691 if (HEPEVT_Wrapper::status(i)==0 && HEPEVT_Wrapper::id(i)==0) {
692 // we remove all entries for which stat=0, id=0
697 HEPEVT_Wrapper::set_status(ilast,
698 HEPEVT_Wrapper::status(i) );
699 HEPEVT_Wrapper::set_id(ilast, HEPEVT_Wrapper::id(i) );
700 HEPEVT_Wrapper::set_parents(
702 HEPEVT_Wrapper::first_parent(i),
703 HEPEVT_Wrapper::last_parent(i) );
704 HEPEVT_Wrapper::set_children(
706 HEPEVT_Wrapper::first_child(i),
707 HEPEVT_Wrapper::last_child(i) );
708 HEPEVT_Wrapper::set_momentum(
710 HEPEVT_Wrapper::px(i), HEPEVT_Wrapper::py(i),
711 HEPEVT_Wrapper::pz(i), HEPEVT_Wrapper::e(i) );
712 HEPEVT_Wrapper::set_mass(ilast, HEPEVT_Wrapper::m(i) );
713 HEPEVT_Wrapper::set_position(
714 ilast, HEPEVT_Wrapper::x(i),HEPEVT_Wrapper::y(i),
715 HEPEVT_Wrapper::z(i),HEPEVT_Wrapper::t(i) );
721 // M. Dobbs (from Borut) - April 26, to fix tauolo/herwig past
722 // the end problem with daughter pointers:
723 // HEPEVT_Wrapper::set_number_entries( ilast );
725 // Finally we need to re-map the mother/daughter pointers.
726 for ( int i=1; i <=ilast; i++ ) {
728 HEPEVT_Wrapper::set_parents(
730 mymap[HEPEVT_Wrapper::first_parent(i)],
731 mymap[HEPEVT_Wrapper::last_parent(i)] );
732 HEPEVT_Wrapper::set_children(
734 mymap[HEPEVT_Wrapper::first_child(i)],
735 mymap[HEPEVT_Wrapper::last_child(i)] );
737 // M. Dobbs (from Borut, part B) - April 26, to fix tauolo/herwig past
738 // the end problem with daughter pointers:
739 HEPEVT_Wrapper::set_number_entries( ilast );
742 void IO_HERWIG::zero_hepevt_entry( int i ) const {
743 if ( i <=0 || i > HepMC::HEPEVT_Wrapper::max_number_entries() ) return;
744 HEPEVT_Wrapper::set_status( i, 0 );
745 HEPEVT_Wrapper::set_id( i, 0 );
746 HEPEVT_Wrapper::set_parents( i, 0, 0 );
747 HEPEVT_Wrapper::set_children( i, 0, 0 );
748 HEPEVT_Wrapper::set_momentum( i, 0, 0, 0, 0 );
749 HEPEVT_Wrapper::set_mass( i, 0 );
750 HEPEVT_Wrapper::set_position( i, 0, 0, 0, 0 );
753 int IO_HERWIG::translate_herwig_to_pdg_id( int id ) const {
754 /// This routine is copied from Lynn Garren's stdhep 5.01.
755 /// see http:///cepa.fnal.gov/psm/stdhep/
758 int hwtran = id; // -9922212
759 int ida = abs(id); // 9922212
760 int j1 = ida%10; // 2
761 int i1 = (ida/10)%10; // 1
762 int i2 = (ida/100)%10; // 2
763 int i3 = (ida/1000)%10; // 2
764 //int i4 =(ida/10000)%10; // 2
765 //int i5 =(ida/100000)%10; // 9
766 //int k99 = (ida/100000)%100; // 9
767 int ksusy = (ida/1000000)%10; // 0
768 //int ku = (ida/10000000)%10; // 0
769 int kqn = (ida/1000000000)%10; // 0
772 // ions not recognized
774 if ( m_print_inconsistency_errors ) {
775 std::cerr << "IO_HERWIG::translate_herwig_to_pdg_id " << id
776 << "nonallowed ion" << std::endl;
779 else if (ida < 100) {
781 hwtran = m_herwig_to_pdg_id[ida];
782 if ( id < 0 ) hwtran *= -1;
783 // check for illegal antiparticles
785 if ( hwtran>=-99 && hwtran<=-81) hwtran=0;
786 if ( m_no_antiparticles.count(hwtran) ) hwtran=0;
789 else if ( ksusy==1 || ksusy==2 ) { ; }
791 else if ( i1!=0 && i3!=0 && j1==2 ) {;}
793 else if ( i1!=0 && i3!=0 && j1==4 ) {;}
795 else if ( i1!=0 && i2!=0 && i3==0 ) {
797 // check for illegal antiparticles
798 if ( i1==i2 && id<0) hwtran=0;
800 else if ( i2!=0 && i3!=0 && i1==0 ) {;}
807 // check for illegal anti KS, KL
808 if ( id==-130 || id==-310 ) hwtran=0;
810 if ( hwtran==0 && ida!=0 && m_print_inconsistency_errors ) {
812 << "IO_HERWIG::translate_herwig_to_pdg_id HERWIG particle "
813 << id << " translates to zero." << std::endl;