2 +-------------------------------------------------------------+
8 | S. Roesler+), R. Engel#), J. Ranft*) |
11 | CH-1211 Geneva 23, Switzerland |
12 | Email: Stefan.Roesler@cern.ch |
14 | #) University of Delaware, BRI |
15 | Newark, DE 19716, USA |
17 | *) University of Siegen, Dept. of Physics |
18 | D-57068 Siegen, Germany |
21 | http://home.cern.ch/sroesler/dpmjet3.html |
24 | Monte Carlo models used for event generation: |
25 | PHOJET 1.12, PYTHIA 6.115 and LEPTO 6.5.1 |
27 +-------------------------------------------------------------+
35 The input of DPMJET consists of option cards. Option cards have all the
36 same structure and have to be given in fixed format except for the
37 section enclosed by PHOINPUT and ENDINPUT which can be given in free format.
39 CODEWD, (WHAT(I),I=1,6), SDUM (default fixed format is
44 - CODEWD is the option keyword
45 - The WHAT-parameters are numerical data
46 - SDUM may contain literal data
48 The order of the input cards is free, with the exception of the START card
49 which initiates event generation and the BEAM card (see below).
51 Most definitions have some default values. If these are acceptable,
52 it is not compulsory that the corresponding option card appear
53 explicitly in the input sequence. Similarly, for most WHAT and/or SDUM
54 parameters a default value is applied if the corresponding field is left
55 blank (or set = 0.0) in the input card.
57 Several option cards may appear more than once in the input sequence.
58 In most cases, each of such additional cards obviously adds more
59 definitions to those already given, provided they are different and not
60 contradictory. In case of conflict, the last given generally overrides
63 Any line starting with "*" is treated as a comment line.
66 1) List of input options
67 ------------------------
69 *** general options ***
72 START start of event generation
73 STOP stop of the event generation
74 RNDMINIT initialization of random number generator
76 *** interacting particles ***
78 PROJPAR projectile parameters
79 TARPAR target parameters
80 EMULSION definition of nuclear target emulsions or composite targets
82 *** collision energy ***
84 ENERGY interaction energy (per nucleon, lab)
85 MOMENTUM interaction momentum (per nucleon, lab)
86 CMENERGY interaction energy (nucleon-nucleon cms)
87 BEAM definition of beam parameters
89 *** model for hadron / lepton / photon - nucleon interactions ***
91 MODEL model to be used to treat nucleon-nucleon interactions
92 PHOINPUT start of PHOJET-specific input
93 ENDINPUT end of PHOJET-specific input
95 LEPTO-CUT parameter CUT in LEPTO-common /LEPTOU/
96 LEPTO-LST parameter LST in LEPTO-common /LEPTOU/
97 LEPTO-PARL parameter PARL in LEPTO-common /LEPTOU/
99 *** Glauber formalism - cross sections ***
101 GLAUB-PAR parameters in Glauber-formalism
102 GLAUB-INI pre-initialization of profile function
103 FLUCTUAT treatment of cross section fluctuations
104 VDM-PAR1 parameters in gamma-nucleus cross section calculation
105 VDM-PAR2 parameters in gamma-nucleus cross section calculation
106 XS-TABLE output of cross section table for requested interaction
107 CENTRAL biasing in impact parameter
109 *** parameters in DPM two-chain approximation ***
111 RECOMBIN chain recombination
112 COMBIJET chain fusion
113 CRONINPT Cronin multiple scattering of partons
114 DIQUARKS sea-diquark/antidiquark-pairs
116 *** hadronization and JETSET-parameters ***
118 LUND-MSTU set parameter MSTU in JETSET-common /LUDAT1/
119 LUND-PARJ set parameter PARJ in JETSET-common /LUDAT1/
120 LUND-PARU set parameter PARJ in JETSET-common /LUDAT1/
121 POPCORN Popcorn-effect in fragmentation
122 PARDECAY decay of Sigma0, Asigma0, pion^0
124 *** nuclear fragmentation ***
126 FERMI Fermi momentum of nucleons
127 TAUFOR formation time suppressed intranuclear cascade
128 PAULI treatment of Pauli's principle
129 COULOMB treatment of Coulomb force
130 EVAP evaporation / fragmentation module
132 *** output and checks ***
134 FRAME Lorentz-frame in which final state is given in DTEVT1
135 HISTOGRAM activate different classes of histograms
136 EMCCHECK extended energy-momentum / quantum-number conservation check
138 *** lepton tagger ***
140 L-TAG lepton tagger (lepton-nucleus interactions only)
141 L-ETAG lepton tagger (lepton-nucleus interactions only)
142 ECMS-CUT lepton tagger (lepton-nucleus interactions only)
144 *** for code development only ***
146 INTPT intrinsic transverse momenta of partons
147 OUTLEVEL output control switches
148 RESONANC treatment of low mass chains
149 SEASU3 treatment of strange-quarks at chain ends
150 XCUTS thresholds for x-sampling
153 2) Description of input options
154 -------------------------------
157 *** general options ***
159 ______________________________________________________________________
161 control card: codewd = TITLE
163 what (1..6), sdum no meaning
165 Note: The control-card following this card must consist of
166 a string of characters usually giving the title of
168 ______________________________________________________________________
170 control card: codewd = START
172 what (1) = number of events default: 100.
173 ______________________________________________________________________
175 control card: codewd = STOP
177 stop of the event generation
179 what (1..6) no meaning
180 ______________________________________________________________________
182 control card: RNDMINIT
184 initialization of random number generator
186 what (1..4) values for initialization (= 1..168)
187 what (5..6), sdum no meaning
188 ______________________________________________________________________
191 *** interacting particles ***
193 ______________________________________________________________________
195 control card: codewd = PROJPAR
197 definition of projectile properties
199 what (1) = (nucleus) mass number
200 (photon) virtuality Q^2
202 maximum virtuality Q^2 of emitted photon
203 (otherwise) no meaning
204 what (2) = (nucleus) charge number
205 (otherwise) no meaning
206 what (3..6) no meaning
207 sdum (hadrons,photons,leptons) particle code word
209 Note: In general, projectile nuclei are defined by what (1) and
210 what (2). All other projectiles are defined by sdum.
211 ______________________________________________________________________
213 control card: codewd = TARPAR
215 definition of target properties
217 what (1) = (nucleus) mass number
218 (otherwise) no meaning
219 what (2) = (nucleus) charge number
220 (otherwise) no meaning
221 what (3..6) no meaning
222 sdum (hadrons) particle code word
224 Note: In general, target nuclei are defined by what (1) and
225 what (2). Target hadrons are defined by sdum.
226 ______________________________________________________________________
229 control card: codewd = EMULSION
231 definition of nuclear target emulsions or composite targets
233 what(1) mass number of emulsion component
234 what(2) charge of emulsion component
235 what(3) fraction of events with this target
236 what(4,5,6) as what(1,2,3) but for a further component
240 Note: If this input-card is once used with valid parameters
241 TARPAR is obsolete. Not the absolute values of the fractions
242 are important but only relative values.
243 This control card can be repeatedly used to define
244 emulsions / composite targets consisting of up to 10
246 ______________________________________________________________________
249 *** collision energy ***
251 ______________________________________________________________________
253 control card: codewd = ENERGY
255 definition of laboratory energy
257 what (1) > 0: what (1) = total energy per nucleon (GeV)
258 < 0: |what(1)| = kinetic energy per nucleon (GeV)
260 if |what(2)| > 0: min. total/kinetic energy per nucleon
261 for variable energy runs
262 what (2) max. energy per nucleon for variable energy runs
263 > 0: what (2) = total energy per nucleon (GeV)
264 < 0: |what(1)| = kinetic energy per nucleon (GeV)
265 ______________________________________________________________________
267 control card: codewd = MOMENTUM
269 definition of laboratory momentum
271 what (1) = momentum per nucleon (GeV/c) of projectile in Lab.
273 what (2..6), sdum no meaning
274 ______________________________________________________________________
276 control card: codewd = CMENERGY
278 what (1) = nucleon-nucleon c.m. energy default: none
279 what (2..6), sdum no meaning
280 ______________________________________________________________________
282 control card: codewd = BEAM
284 definition of beam parameters
286 what (1/2) > 0 : energy per nucleon of beam 1/2 (GeV)
287 < 0 : |what(1/2)| = energy per charge of
289 (beam 1 is directed into positive z-direction)
290 what (3) beam crossing angle, defined as 2x angle between
291 one beam and the z-axis (micro rad)
292 what (4) angle with x-axis defining the collision plane
293 what (5..6), sdum no meaning
295 Note: This card requires previously defined projectile and
296 target identities (PROJPAR, TARPAR) !
297 ______________________________________________________________________
300 *** model for hadron / lepton / photon - nucleon interactions ***
302 ______________________________________________________________________
304 control card: codewd = MODEL
306 Model used to describe nucleon(hadron,photon,lepton)-nucleon
309 what (1) (only if sdum = LEPTO)
310 variable INTER (see LEPTO-manual)
314 = 4 gamma/Z0 exchange
316 sdum = DTUNUC two-chain model as for versions 1.xx
317 (nucleon/hadron-nucleon interactions only)
318 = PHOJET multiple chains including minijets
321 what (2..6) no meaning
322 ______________________________________________________________________
324 control card: codewd = PHOINPUT
326 Start of PHOJET-specific input.
327 For details and a list of PHOJET input cards see the PHOJET-manual
329 http://lepton.bartol.udel.edu/~eng/phojet.html
330 Note: This part of the input has to be closed by the ENDINPUT-card
332 what (1..6), sdum no meaning
333 ______________________________________________________________________
335 control card: codewd = ENDINPUT
337 End of PHOJET-specific input.
338 what (1..6), sdum no meaning
339 ______________________________________________________________________
341 control card: codewd = HADRIN
345 what (1) = 0. elastic/inelastic interactions with probab.
346 as defined by cross-sections
347 = 1. inelastic interactions forced
348 = 2. elastic interactions forced default: 1
349 what (2) upper threshold in total energy (GeV) below
350 which interactions are sampled by HADRIN
351 default: steady transition btw. HADRIN and
352 DPM in the range 4-7 GeV
353 what (3..6), sdum no meaning
354 ______________________________________________________________________
356 control card: codewd = LEPTO-CUT
358 set parameter CUT in LEPTO-common /LEPTOU/
360 what (1) = index in CUT-array
361 what (2) = new value of CUT( int(what(1)) )
362 what (3), what(4) and what (5), what(6) further
363 parameter in the same way as what (1) and what (2)
364 default: default-LEPTO parameters
366 Note: see LEPTO-manual.
367 ______________________________________________________________________
369 control card: codewd = LEPTO-LST
371 set parameter LST in LEPTO-common /LEPTOU/
373 what (1) = index in LST-array
374 what (2) = new value of LST( int(what(1)) )
375 what (3), what(4) and what (5), what(6) further
376 parameter in the same way as what (1) and what (2)
377 default: default-LEPTO parameters
379 Note: see LEPTO-manual.
380 ______________________________________________________________________
382 control card: codewd = LEPTO-PARL
384 set parameter PARL in LEPTO-common /LEPTOU/
386 what (1) = index in PARL-array
387 what (2) = new value of PARL( int(what(1)) )
388 what (3), what(4) and what (5), what(6) further
389 parameter in the same way as what (1) and what (2)
390 default: default-LEPTO parameters
392 Note: see LEPTO-manual.
393 ______________________________________________________________________
396 *** Glauber formalism - cross sections ***
398 ______________________________________________________________________
400 control card: codewd = GLAUB-PAR
402 parameters in Glauber-formalism
404 what (1) number of nucleon configurations sampled in integration
405 over nuclear density default: 1000
406 what (2) number of bins for integration over impact-parameter and
407 for profile-function calculation default: 49
408 what (3) = 1 calculation of tot., el. and qel. cross sections
409 otherwise calculation of production cross sections only
411 what (4) = 1 read pre-calculated impact-parameter distribution
412 from "sdum".glb for fixed projectile/target/energy
414 = -1 dump calculated impact-parameter distribution
415 into "sdum".glb for fixed or variable projectile/
417 = 100 read pre-calculated impact-parameter distribution
418 from "sdum".glb for variable projectile/target/
421 what (5..6) no meaning
422 sdum if |what (4)| = 1 name of in/output-file (sdum.glb)
423 ______________________________________________________________________
425 control card: codewd = GLAUB-INI
427 pre-initialization of profile function
429 what (1) lower energy limit for initialization
431 < 0 nucleon-nucleon cms
432 what (2) upper energy limit for initialization
434 < 0 nucleon-nucleon cms
435 what (3) > 0 # of equidistant lin. bins in E
436 < 0 # of equidistant log. bins in E
437 what (4) maximum projectile mass number for which the Glauber
438 data are initialized for each projectile mass number
439 (if <= mass given with the PROJPAR-card)
441 what (5) steps in mass number starting from what (4)
442 up to mass number defined with PROJPAR-card
443 for which Glauber data are initialized
447 ______________________________________________________________________
449 control card: codewd = FLUCTUAT
451 Treatment of cross section fluctuations
453 what (1) = 1 cross section fluctuations treated default: 0.
454 what (2..6), sdum no meaning
455 ______________________________________________________________________
458 control card: codewd = VDM-PAR1
460 parameters in gamma-nucleus cross section calculation
462 what (1) = Lambda^2 default: 2.
463 what (2) lower limit in M^2 integration
466 = 3 (m_phi)^2 default: 1
467 what (3) upper limit in M^2 integration
471 what (4) CKMT F_2 structure function
473 = 100 deuteron default: 2212
474 what (5) calculation of gamma-nucleon xsections
475 = 1 according to CKMT-parametrization of F_2
476 = 2 integrating SIGVP over M^2
478 = 4 PHOJET cross sections default: 4
480 what (6), sdum no meaning
481 ______________________________________________________________________
483 control card: codewd = VDM-PAR2
485 parameters in gamma-nucleus cross section calculation
487 what (1) = 0 no suppression of shadowing by direct photon
489 = 1 suppression .. default: 1
490 what (2) = 0 no suppression of shadowing by anomalous
491 component if photon-F_2
492 = 1 suppression .. default: 1
493 what (3) = 0 no suppression of shadowing by coherence
495 = 1 suppression .. default: 1
496 what (4) = 1 longitudinal polarized photons are taken into
498 eps*R*Q^2/M^2 = what(4)*Q^2/M^2 default: 0
499 what (5..6), sdum no meaning
500 ______________________________________________________________________
502 control card: codewd = XS-TABLE
504 output of cross section table for requested interaction
505 - particle production deactivated ! -
507 what (1) lower energy limit for tabulation
509 < 0 nucleon-nucleon cms
510 what (2) upper energy limit for tabulation
512 < 0 nucleon-nucleon cms
513 what (3) > 0 # of equidistant lin. bins in E
514 < 0 # of equidistant log. bins in E
515 what (4) lower limit of particle virtuality (photons)
516 what (5) upper limit of particle virtuality (photons)
517 what (6) > 0 # of equidistant lin. bins in Q^2
518 < 0 # of equidistant log. bins in Q^2
519 ______________________________________________________________________
521 control card: codewd = CENTRAL
523 Biasing in impact parameter
525 what (1) = 1. central production
526 (not recommended, has to be updated)
527 what (1) < 0 and > -100
528 what (2) = min. impact parameter
529 what (3) = max. impact parameter
531 what (2) = fraction of cross section
532 what (4..6), sdum no meaning
534 Note: if what (1) = -1 : evaporation is suppressed
535 if what (1) < -1 : evaporation is allowed
536 ______________________________________________________________________
539 *** parameters in DPM two-chain approximation ***
541 ______________________________________________________________________
543 control card: codewd = RECOMBIN
546 (recombine S-S and V-V chains to V-S chains)
548 what (1) = -1. recombination switched off default: 1
549 what (2..6), sdum no meaning
551 Note: Limited applicability for MODEL = PHOJET.
552 ______________________________________________________________________
554 control card: codewd = COMBIJET
556 chain fusion (2 q-aq --> qq-aqaq)
558 what (1) = 1 fusion treated default: 0.
559 what (2) minimum number of uncombined chains from
560 single projectile or target nucleons
562 what (3..6), sdum no meaning
564 Note: Limited applicability for MODEL = PHOJET.
565 ______________________________________________________________________
567 control card: codewd = CRONINPT
569 Cronin effect (multiple scattering of partons at chain ends)
571 what (1) = -1 Cronin effect not treated
572 default (h+A): 1 (A+A): 0
573 what (2) scattering parameter default: 0.64
574 what (3..6), sdum no meaning
576 Note: The Cronin-treatment should not be invoked for A+A int.
577 ______________________________________________________________________
579 control card: codewd = DIQUARKS
581 what (1) = -1. sea-diquark/antidiquark-pairs not treated
583 what (2..6), sdum no meaning
585 Note: Limited applicability for MODEL = PHOJET.
586 ______________________________________________________________________
589 *** hadronization and JETSET-parameters ***
591 ______________________________________________________________________
593 control card: codewd = LUND-MSTU
595 parameter MSTU in JETSET-common /LUDAT1/
597 what (1) = index according to LUND-common block
598 what (2) = new value of MSTU( int(what(1)) )
599 what (3), what(4) and what (5), what(6) further
600 parameter used in the same way as what (1) and what (2)
602 Note: The use of this card is not recommended. Some parameters
603 can presently not be changed with this card anyway.
604 Limited applicability for MODEL = PHOJET.
605 ______________________________________________________________________
607 control card: codewd = LUND-PARJ
609 parameter PARJ in JETSET-common /LUDAT1/
611 what (1) = index according to LUND-common block
612 what (2) = new value of PARJ( int(what(1)) )
613 what (3), what(4) and what (5), what(6) further
614 parameter used in the same way as what (1) and what (2)
616 Note: The use of this card is not recommended. Some parameters
617 can presently not be changed with this card anyway.
618 Limited applicability for MODEL = PHOJET.
619 ______________________________________________________________________
621 control card: codewd = LUND-PARU
623 parameter PARJ in JETSET-common /LUDAT1/
625 what (1) = index according to LUND-common block
626 what (2) = new value of PARU( int(what(1)) )
627 what (3), what(4) and what (5), what(6) further
628 parameter used in the same way as what (1) and what (2)
630 Note: The use of this card is not recommended. Some parameters
631 can presently not be changed with this card anyway.
632 Limited applicability for MODEL = PHOJET.
633 ______________________________________________________________________
635 control card: codewd = POPCORN
637 "Popcorn-effect" in fragmentation
639 what (1) < 0 Popcorn-effect switched off (MSTJ(12) = 1)
640 >=0 Popcorn-effect treated (PARJ(5) = what (1))
642 what (2..6), sdum no meaning
643 ______________________________________________________________________
645 control card: codewd = PARDECAY
647 what (1) = 1. Sigma0/Asigma0 decay treated by JETSET
648 = 2. pion^0 decay after intranucl. cascade
649 default: 0 (no such decays)
650 what (2..6), sdum no meaning
651 ______________________________________________________________________
654 *** nuclear fragmentation ***
656 ______________________________________________________________________
658 control card: codewd = FERMI
660 what (1) = -1 Fermi-motion of nucleons not treated default: 1
661 what (2) = scale factor for Fermi-momentum default: 0.68
662 what (3..6), sdum no meaning
663 ______________________________________________________________________
665 control card: codewd = TAUFOR
667 formation time suppressed intranuclear cascade
669 what (1) formation time (in fm/c) default: 3.1 fm/c
670 what (2) number of generations followed default: 25
671 what (3) = 1. p_t-dependent formation zone
672 = 2. constant formation zone default: 1
673 what (4) modus of selection of nucleus where the
674 cascade if followed first
675 = 1. proj./target-nucleus with probab. 1/2
676 = 2. nucleus with highest mass
677 = 3. proj. nucleus if particle is moving in pos. z
678 targ. nucleus if particle is moving in neg. z
680 what (5..6), sdum no meaning
681 ______________________________________________________________________
683 control card: codewd = PAULI
685 what (1) = -1 Pauli's principle for secondary
686 interactions not treated default: 1
687 what (2..6), sdum no meaning
688 ______________________________________________________________________
690 control card: codewd = COULOMB
692 what (1) = -1. Coulomb-energy treatment switched off default: 1
693 what (2..6), sdum no meaning
694 ______________________________________________________________________
696 control card: codewd = EVAP
698 evaporation module of FLUKA
700 The following options and defaults apply only if the code is linked
701 to the FLUKA-library (see README file).
703 what (1) =< -1 ==> evaporation is switched off
704 >= 1 ==> evaporation is performed
706 what (1) = i1 + i2*10 + i3*100 + i4*10000
707 (i1, i2, i3, i4 >= 0 )
709 i1 is the flag for selecting the T=0 level density option used
710 = 1: standard EVAP level densities with Cook pairing
712 = 2: Z,N-dependent Gilbert & Cameron level densities
714 = 3: Julich A-dependent level densities
715 = 4: Z,N-dependent Brancazio & Cameron level densities
717 i2 >= 1: high energy fission activated
718 (default high energy fission is activated)
720 i3 = 0: No energy dependence for level densities
721 = 1: Standard Ignyatuk (1975, 1st) energy dependence
722 for level densities (default)
723 = 2: Standard Ignyatuk (1975, 1st) energy dependence
724 for level densities with NOT used set of parameters
725 = 3: Standard Ignyatuk (1975, 1st) energy dependence
726 for level densities with NOT used set of parameters
727 = 4: Second Ignyatuk (1975, 2nd) energy dependence
729 = 5: Second Ignyatuk (1975, 2nd) energy dependence
730 for level densities with fit 1 Iljinov & Mebel set of
732 = 6: Second Ignyatuk (1975, 2nd) energy dependence
733 for level densities with fit 2 Iljinov & Mebel set of
735 = 7: Second Ignyatuk (1975, 2nd) energy dependence
736 for level densities with fit 3 Iljinov & Mebel set of
738 = 8: Second Ignyatuk (1975, 2nd) energy dependence
739 for level densities with fit 4 Iljinov & Mebel set of
742 i4 >= 1: Original Gilbert and Cameron pairing energies used
743 (default Cook's modified pairing energies)
745 what (2) = ig + 10 * if (ig and if must have the same sign)
747 ig =< -1 ==> deexcitation gammas are not produced
748 (if the evaporation step is not performed
749 they are never produced)
750 if =< -1 ==> Fermi Break Up is not invoked
751 (if the evaporation step is not performed
753 The default is: deexcitation gamma are produced and
754 Fermi break up is activated
755 what (3..6), sdum no meaning
756 ______________________________________________________________________
759 *** output and checks ***
761 ______________________________________________________________________
763 control card: codewd = FRAME
765 frame in which final state is given in DTEVT1
767 what (1) = 1 target rest frame (laboratory)
768 = 2 nucleon-nucleon cms default: 1
769 ______________________________________________________________________
772 control card: codewd = HISTOGRAM
774 activate different classes of histograms
776 default: no histograms
777 ______________________________________________________________________
779 control card: codewd = EMCCHECK
781 extended energy-momentum / quantum-number conservation check
783 what (1) = -1 extended check not performed default: -1.
784 what (2..6), sdum no meaning
785 ______________________________________________________________________
788 *** lepton tagger ***
790 ______________________________________________________________________
792 control card: codewd = L-TAG
793 (lepton-nucleus interactions with MODEL=PHOJET only)
796 definition of kinematic cuts for radiated photon and
797 outgoing lepton detection in lepton-nucleus interactions
803 what (5) = theta_min (Lab)
804 what (6) = theta_max (Lab) default: no cuts
806 ______________________________________________________________________
809 control card: codewd = L-ETAG
810 (lepton-nucleus interactions with MODEL=PHOJET only)
813 what (1) = min. outgoing lepton energy (in Lab)
814 what (2) = min. photon energy (in Lab)
815 what (3) = max. photon energy (in Lab) default: no cuts
816 what (2..6), sdum no meaning
817 ______________________________________________________________________
819 control card: codewd = ECMS-CUT
820 (lepton-nucleus interactions with MODEL=PHOJET only)
822 what (1) = min. c.m. energy to be sampled
823 what (2) = max. c.m. energy to be sampled
824 what (3) = min x_Bj to be sampled default: no cuts
825 what (3..6), sdum no meaning
826 ______________________________________________________________________
829 *** for code development only ***
831 ______________________________________________________________________
833 control card: codewd = INTPT
835 what (1) = -1 intrinsic transverse momenta of partons
836 not treated default: 1
837 what (2..6), sdum no meaning
838 ______________________________________________________________________
840 control card: codewd = OUTLEVEL
842 output control switches
844 what (1) = internal rejection informations default: 0
845 what (2) = energy-momentum conservation check output default: 0
846 what (3..6) internal warning messages default: 0
847 ______________________________________________________________________
849 control card: codewd = RESONANC
851 treatment of low mass chains
853 what (1) = -1 low chain masses are not corrected for resonance
855 what (2) = -1 massless partons default: 1. (massive)
856 what (3) = -1 chain-system containing chain of too small
857 mass is rejected (note: this does not fully
858 apply to S-S chains) default: 0.
859 what (4..6), sdum no meaning
860 ______________________________________________________________________
862 control card: codewd = SEASU3
864 Treatment of strange-quarks at chain ends
866 what (1) (SEASQ) strange-quark suppression factor
867 iflav = 1.+rndm*(2.+SEASQ) default: 1.
868 what (2..6), sdum no meaning
869 ______________________________________________________________________
871 control card: codewd = XCUTS
873 thresholds for x-sampling
875 what (1) defines lower threshold for val.-q x-value (CVQ)
877 what (2) defines lower threshold for val.-qq x-value (CDQ)
879 what (3) defines lower threshold for sea-q x-value (CSEA)
881 what (4) sea-q x-values in S-S chains (SSMIMA) default: 0.14
882 what (5) not used default: 2.
883 what (6), sdum no meaning
885 Note: Lower thresholds (what(1..3)) are def. as x_thr=CXXX/ECM
886 ______________________________________________________________________
890 EVENT HISTORY - COMMON /DTEVT1/
891 _________________________________
894 1) Common block DTEVT1
895 ----------------------
897 The complete history of each event can be found in COMMON /DTEVT1/
901 NHKK number of entries in common block
902 NEVHKK number of the event
903 ISTHKK(i) status code for entry i
904 IDHKK(i) identifier for the entry
905 (for particles: identifier according to the PDG scheme)
906 JMOHKK(1,i) pointer to the entry of the first mother of entry i
907 JMOHKK(2,i) pointer to the entry of the second mother of entry i
908 JDAHKK(1,i) pointer to the entry of the first daughter of entry i
909 JDAHKK(2,i) pointer to the entry of the second daughter of entry i
910 PHKK(1..3,i) 3-momentum
913 VHKK / WHKK spatial position of particle in target / projectile
916 2) Final state particles
917 ------------------------
919 The final state particles from the actual event (number NEVHKK)
920 can be found in DTEVT1 and identified by their status:
922 ISTHKK(i) = 1 final state particle produced in
923 photon-/hadron-/nucleon-nucleon collisions or
924 in intranuclear cascade processes
925 -1 nucleons, deuterons, H-3, He-3, He-4 evaporated
926 from excited nucleus, fragmentation and fission
927 products (A > 4) and photons produced in nuclear
928 deexcitation processes
929 1001 residual nucleus (ground state)
931 The types of these particles/nuclei are given in IDHKK as follows
933 all final state particles except nuclei :
934 IDHKK(i)=particle identifier according to PDG numbering scheme
935 nuclei (A > 1: evaporation / fragmentation / fission products, and
937 IDHKK(i)=80000, IDRES(i)=mass number, IDXRES(i)=charge number
939 The 4-momenta and masses can be found in PHKK (target nucleus rest frame
940 unless defined by the FRAME-card):
941 PHKK(1..3,i) 3-momentum (p_x,p_y,p_z)