[u/mrichter/AliRoot.git] / THerwig / THerwig6.cxx

// definition of c++ Class THerwig6 to be used in ROOT
// this is a c++ interface to the F77 Herwig6 program
// author: j. g. contreras jgcn@moni.mda.cinvestav.mx
// date: december 22, 2000
//  Class THerwig6 is an interface to the Herwig program
//
// C-----------------------------------------------------------------------
// C                           H E R W I G
// C
// C            a Monte Carlo event generator for simulating
// C        +---------------------------------------------------+
// C        | Hadron Emission Reactions With Interfering Gluons |
// C        +---------------------------------------------------+
// C I.G. Knowles(*), G. Marchesini(+), M.H. Seymour($) and B.R. Webber(#)
// C-----------------------------------------------------------------------
// C with Minimal Supersymmetric Standard Model Matrix Elements by
// C                  S. Moretti($) and K. Odagiri($)
// C-----------------------------------------------------------------------
// C R parity violating Supersymmetric Decays and Matrix Elements by
// C                          P. Richardson(&)
// C-----------------------------------------------------------------------
// C matrix element corrections to top decay and Drell-Yan type processes
// C                         by G. Corcella(+)
// C-----------------------------------------------------------------------
// C Deep Inelastic Scattering and Heavy Flavour Electroproduction by
// C                  G. Abbiendi(@) and L. Stanco(%)
// C-----------------------------------------------------------------------
// C and Jet Photoproduction in Lepton-Hadron Collisions by J. Chyla(~)
// C-----------------------------------------------------------------------
// C(*)  Department of Physics & Astronomy, University of Edinburgh
// C(+)  Dipartimento di Fisica, Universita di Milano
// C($)  Rutherford Appleton Laboratory
// C(#)  Cavendish Laboratory, Cambridge
// C(&)  Department of Physics, University of Oxford
// C(@)  Dipartimento di Fisica, Universita di Bologna
// C(%)  Dipartimento di Fisica, Universita di Padova
// C(~)  Institute of Physics, Prague
// C-----------------------------------------------------------------------
// C                  Version 6.100 - 16th December 1999
// C-----------------------------------------------------------------------
// C Main reference:
// C    G.Marchesini,  B.R.Webber,  G.Abbiendi,  I.G.Knowles,  M.H.Seymour,
// C    and L.Stanco, Computer Physics Communications 67 (1992) 465.
// C-----------------------------------------------------------------------
// C Please send e-mail about  this program  to one of the  authors at the
// C following Internet addresses:
// C    I.Knowles@ed.ac.uk        Giuseppe.Marchesini@mi.infn.it
// C    M.Seymour@rl.ac.uk        webber@hep.phy.cam.ac.uk
// C-----------------------------------------------------------------------


#include "THerwig6.h"
#include "TClonesArray.h"
#include "TParticle.h"
#include "TObjArray.h"


ClassImp(THerwig6)

extern "C" {
  void*  herwig6_common_block_address_(char*, int len);
  void   herwig6_open_fortran_file_ (int* lun, char* name, int);
  void   herwig6_close_fortran_file_(int* lun);
}


THerwig6::THerwig6() : TGenerator("Herwig6","Herwig6") {

// THerwig6 constructor: creates a TClonesArray in which it will store all
// particles. Note that there may be only one functional THerwig6 object
// at a time, so it's not use to create more than one instance of it.

  delete fParticles; // was allocated as TObjArray in TGenerator

  fParticles = new TClonesArray("TParticle",50);

  // initialize common-blocks
  fHepevt = (Hepevt_t*) herwig6_common_block_address_((char*)"HEPEVT",6);
  fHwbeam = (Hwbeam_t*) herwig6_common_block_address_((char*)"HWBEAM",6);
  fHwbmch = (Hwbmch_t*) herwig6_common_block_address_((char*)"HWBMCH",6);
  fHwproc = (Hwproc_t*) herwig6_common_block_address_((char*)"HWPROC",6);
  fHwpram = (Hwpram_t*) herwig6_common_block_address_((char*)"HWPRAM",6);
  fHwprch = (Hwprch_t*) herwig6_common_block_address_((char*)"HWPRCH",6);
  fHwpart = (Hwpart_t*) herwig6_common_block_address_((char*)"HWPART",6);
  fHwparp = (Hwparp_t*) herwig6_common_block_address_((char*)"HWPARP",6);
  fHwbosc = (Hwbosc_t*) herwig6_common_block_address_((char*)"HWBOSC",6);
  fHwparc = (Hwparc_t*) herwig6_common_block_address_((char*)"HWPARC",6);
  fHwbrch = (Hwbrch_t*) herwig6_common_block_address_((char*)"HWBRCH",6);
  fHwevnt = (Hwevnt_t*) herwig6_common_block_address_((char*)"HWEVNT",6);
  fHwhard = (Hwhard_t*) herwig6_common_block_address_((char*)"HWHARD",6);
  fHwprop = (Hwprop_t*) herwig6_common_block_address_((char*)"HWPROP",6);
  fHwunam = (Hwunam_t*) herwig6_common_block_address_((char*)"HWUNAM",6);
  fHwupdt = (Hwupdt_t*) herwig6_common_block_address_((char*)"HWUPDT",6);
  fHwuwts = (Hwuwts_t*) herwig6_common_block_address_((char*)"HWUWTS",6);
  fHwuclu = (Hwuclu_t*) herwig6_common_block_address_((char*)"HWUCLU",6);
  fHwdist = (Hwdist_t*) herwig6_common_block_address_((char*)"HWDIST",6);
  fHwqdks = (Hwqdks_t*) herwig6_common_block_address_((char*)"HWQDKS",6);
  fHwusud = (Hwusud_t*) herwig6_common_block_address_((char*)"HWUSUD",6);
  fHwsusy = (Hwsusy_t*) herwig6_common_block_address_((char*)"HWSUSY",6);
  fHwrpar = (Hwrpar_t*) herwig6_common_block_address_((char*)"HWRPAR",6);
  fHwminb = (Hwminb_t*) herwig6_common_block_address_((char*)"HWMINB",6);
  fHwclus = (Hwclus_t*) herwig6_common_block_address_((char*)"HWCLUS",6);
 }

//------------------------------------------------------------------------------
 THerwig6::~THerwig6()
 {
   // Destructor. The data members of TGenerator are delete by itself
 }

//______________________________________________________________________________
void THerwig6::GenerateEvent() 
{
  
  //initialize event
  hwuine_();
  // generate hard subprocess
  hwepro_();
  // generate parton cascades
  hwbgen_();
  // do heavy objects decay
  hwdhob_();
  // do cluster formation
  hwcfor_();
  // do cluster decays
  hwcdec_();
  // do unstable particle decays
  hwdhad_();
  // do heavy flavor hadrons decay
  hwdhvy_();
  // add soft underlying event
  hwmevt_();
  // finish event
  hwufne_();
}

//______________________________________________________________________________
void THerwig6::OpenFortranFile(int lun, char* name) {
  herwig6_open_fortran_file_(&lun, name, strlen(name));
}

//______________________________________________________________________________
void THerwig6::CloseFortranFile(int lun) {
  herwig6_close_fortran_file_(&lun);
}

void THerwig6::Initialize(const char *beam, const char *target, double pbeam1, double pbeam2, int iproc)

{
  // perform the initialization for Herwig6
  // sets correct title. 
  // after calling this method all parameters are set to their default
  // values. If you want to modify any parameter you have to set the new
  // value after calling Initialize and before PrepareRun.

   char  cbeam[8];
   strncpy(cbeam,beam,8);
   char  ctarget[8];
   strncpy(ctarget,target,8);
   printf("\n Initializing Herwig !! \n");
   if ( (!strncmp(beam, "E+"    ,2)) &&
        (!strncmp(beam, "E-"    ,2)) &&
        (!strncmp(beam, "MU+"   ,3)) &&
        (!strncmp(beam, "MU-"   ,3)) &&
        (!strncmp(beam, "NUE"   ,3)) &&
        (!strncmp(beam, "NUEB"  ,4)) &&
        (!strncmp(beam, "NUMU"  ,4)) &&
        (!strncmp(beam, "NMUB"  ,4)) &&
        (!strncmp(beam, "NTAU"  ,4)) &&
        (!strncmp(beam, "NTAB"  ,4)) &&
        (!strncmp(beam, "GAMA"  ,4)) &&
        (!strncmp(beam, "P       ",8)) &&
        (!strncmp(beam, "PBAR    ",8)) &&
        (!strncmp(beam, "N"     ,1)) &&
        (!strncmp(beam, "NBAR"  ,4)) &&
        (!strncmp(beam, "PI+"   ,3)) &&
        (!strncmp(beam, "PI-"   ,3)) ) {
      printf("WARNING! In THerwig6:Initialize():\n");
      printf(" specified beam=%s is unrecognized .\n",beam);
      printf(" resetting to \"P\" .");
      sprintf(cbeam,"P");
   }

   if ( (!strncmp(target, "E+"    ,2)) &&
        (!strncmp(target, "E-"    ,2)) &&
        (!strncmp(target, "MU+"   ,3)) &&
        (!strncmp(target, "MU-"   ,3)) &&
        (!strncmp(target, "NUE"   ,3)) &&
        (!strncmp(target, "NUEB"  ,4)) &&
        (!strncmp(target, "NUMU"  ,4)) &&
        (!strncmp(target, "NMUB"  ,4)) &&
        (!strncmp(target, "NTAU"  ,4)) &&
        (!strncmp(target, "NTAB"  ,4)) &&
        (!strncmp(target, "GAMA"  ,4)) &&
        (!strncmp(target, "P       ",8)) &&
        (!strncmp(target, "PBAR    ",8)) &&
        (!strncmp(target, "N"     ,1)) &&
        (!strncmp(target, "NBAR"  ,4)) &&
        (!strncmp(target, "PI+"   ,3)) &&
        (!strncmp(target, "PI-"   ,3)) ) {
      printf("WARNING! In THerwig6:Initialize():\n");
      printf(" specified target=%s is unrecognized .\n",target);
      printf(" resetting to \"P\" .");
      sprintf(ctarget,"P");
   }

   // initialization:
   // type of beams
   strncpy(fHwbmch->PART1,beam,8);
   strncpy(fHwbmch->PART2,target,8);
   // momentum of beams
   fHwproc->PBEAM1=pbeam1;
   fHwproc->PBEAM2=pbeam2;
   // process to generate
   fHwproc->IPROC=iproc;
   // not used in the class definition 
   fHwproc->MAXEV=1;

   // reset all parameters
   hwigin_();
   
   // set correct title
   char atitle[132];
   double win=pbeam1+pbeam2;
   printf("\n %s - %s at %g GeV",beam,target,win);
   sprintf(atitle,"%s-%s at %g GeV",cbeam,ctarget,win);
   SetTitle(atitle); 
}

void THerwig6::PrepareRun()
{
  // compute parameter dependent constants
  hwuinc_();
  // initialize elementary processes
  hweini_();
}

//______________________________________________________________________________
TObjArray* THerwig6::ImportParticles(Option_t *option)
{
//
//  Default primary creation method. It reads the /HEPEVT/ common block which
//  has been filled by the GenerateEvent method. If the event generator does
//  not use the HEPEVT common block, This routine has to be overloaded by
//  the subclasses.
//  The default action is to store only the stable particles (ISTHEP = 1)
//  This can be demanded explicitly by setting the option = "Final"
//  If the option = "All", all the particles are stored.
//
  fParticles->Clear();
  Int_t numpart = fHepevt->NHEP;
  TClonesArray &a = *((TClonesArray*)fParticles);
  if (!strcmp(option,"") || !strcmp(option,"Final")) {
    for (Int_t i = 0; i<=numpart; i++) {
      if (fHepevt->ISTHEP[i] == 1) {
//
//  Use the common block values for the TParticle constructor
//
        new(a[i]) TParticle(
                                   fHepevt->IDHEP[i],
                                   fHepevt->ISTHEP[i],
                                   fHepevt->JMOHEP[i][0]-1,
                                   fHepevt->JMOHEP[i][1]-1,
                                   fHepevt->JDAHEP[i][0]-1,
                                   fHepevt->JDAHEP[i][1]-1,

                                   fHepevt->PHEP[i][0],
                                   fHepevt->PHEP[i][1],
                                   fHepevt->PHEP[i][2],
                                   fHepevt->PHEP[i][3],
                                   fHepevt->VHEP[i][0],
                                   fHepevt->VHEP[i][1],
                                   fHepevt->VHEP[i][2],
                                   fHepevt->VHEP[i][3]);
        }
     }
  }
  else if (!strcmp(option,"All")) {
    for (Int_t i = 0; i<=numpart; i++) {
      new(a[i]) TParticle(
                                   fHepevt->IDHEP[i],
                                   fHepevt->ISTHEP[i],
                                   fHepevt->JMOHEP[i][0]-1,
                                   fHepevt->JMOHEP[i][1]-1,
                                   fHepevt->JDAHEP[i][0]-1,
                                   fHepevt->JDAHEP[i][1]-1,

                                   fHepevt->PHEP[i][0],
                                   fHepevt->PHEP[i][1],
                                   fHepevt->PHEP[i][2],
                                   fHepevt->PHEP[i][3],
                                   fHepevt->VHEP[i][0],
                                   fHepevt->VHEP[i][1],
                                   fHepevt->VHEP[i][2],
                                   fHepevt->VHEP[i][3]);
    }
  }
  return fParticles;
}

//______________________________________________________________________________
Int_t THerwig6::ImportParticles(TClonesArray *particles, Option_t *option)
{
//
//  Default primary creation method. It reads the /HEPEVT/ common block which
//  has been filled by the GenerateEvent method. If the event generator does
//  not use the HEPEVT common block, This routine has to be overloaded by
//  the subclasses.
//  The function loops on the generated particles and store them in
//  the TClonesArray pointed by the argument particles.
//  The default action is to store only the stable particles (ISTHEP = 1)
//  This can be demanded explicitly by setting the option = "Final"
//  If the option = "All", all the particles are stored.
//
  if (particles == 0) return 0;
  TClonesArray &refParticles = *particles;
  refParticles.Clear();
  Int_t numpart = fHepevt->NHEP;
  if (!strcmp(option,"") || !strcmp(option,"Final")) {
    for (Int_t i = 0; i< numpart; i++) {
      if (fHepevt->ISTHEP[i] == 1) {
//
//  Use the common block values for the TParticle constructor
//
        new(refParticles[i]) TParticle(
                                   fHepevt->IDHEP[i],
                                   fHepevt->ISTHEP[i],
                                   fHepevt->JMOHEP[i][0]-1,
                                   fHepevt->JMOHEP[i][1]-1,
                                   fHepevt->JDAHEP[i][0]-1,
                                   fHepevt->JDAHEP[i][1]-1,

                                   fHepevt->PHEP[i][0],
                                   fHepevt->PHEP[i][1],
                                   fHepevt->PHEP[i][2],
                                   fHepevt->PHEP[i][3],
                                   fHepevt->VHEP[i][0],
                                   fHepevt->VHEP[i][1],
                                   fHepevt->VHEP[i][2],
                                   fHepevt->VHEP[i][3]);
        }
     }
  }
  else if (!strcmp(option,"All")) {
    for (Int_t i = 0; i< numpart; i++) {
      new(refParticles[i]) TParticle(
                                   fHepevt->IDHEP[i],
                                   fHepevt->ISTHEP[i],
                                   fHepevt->JMOHEP[i][0]-1,
                                   fHepevt->JMOHEP[i][1]-1,
                                   fHepevt->JDAHEP[i][0]-1,
                                   fHepevt->JDAHEP[i][1]-1,

                                   fHepevt->PHEP[i][0],
                                   fHepevt->PHEP[i][1],
                                   fHepevt->PHEP[i][2],
                                   fHepevt->PHEP[i][3],
                                   fHepevt->VHEP[i][0],
                                   fHepevt->VHEP[i][1],
                                   fHepevt->VHEP[i][2],
                                   fHepevt->VHEP[i][3]);
    }
  }
  return numpart;
}

void THerwig6::Hwigin()
{
  hwigin_();
}

void THerwig6::Hwuinc()
{
  hwuinc_();
}

void THerwig6::Hwusta(char* name)

{
  hwusta_(name,8);
}

void THerwig6::Hweini()

{
  hweini_();
}

void THerwig6::Hwuine()

{
  hwuine_();
}

void THerwig6::Hwepro()

{
  hwepro_();
}

void THerwig6::Hwbgen()

{
  hwbgen_();
}

void THerwig6::Hwdhob()

{
  hwdhob_();
}

void THerwig6::Hwcfor()

{
  hwcfor_();
}

void THerwig6::Hwcdec()

{
  hwcdec_();
}

void THerwig6::Hwdhad()

{
  hwdhad_();
}

void THerwig6::Hwdhvy()

{
  hwdhvy_();
}

void THerwig6::Hwmevt()

{
  hwmevt_();
}

void THerwig6::Hwufne()

{
  hwufne_();
}

void THerwig6::Hwefin()

{
  hwefin_();
}

void THerwig6::SetupTest()
{
  // exampe of running herwig and generating one event
  // after changing some options
  Initialize("P","PBAR",900.,900.,1500);
  // here you can set some parameters
  SetPTMIN(15.); // Min pt in hadronic jet production
  SetYJMIN(-4.); // Min jet rapidity
  SetYJMAX(4.);  // Max jet rapidity
  // after you set your wished parameters
  // herwig can do its work
  PrepareRun();
  int nEvToGenerate=1;
  for (int i=0;i<nEvToGenerate;i++)
    {
      GenerateEvent();
      // do your stuff. For ex:
      int nOfPar=GetNumberOfParticles(); // from TGenerator
      for (int j=0; j<nOfPar; j++)
	{
	  TParticle* p=GetParticle(j);
	  // here you do whatever you want with the particle
	  p->Print();
	};
    };
}
Commit	Line	Data
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	{
bbc19b09	108	// Destructor. The data members of TGenerator are delete by itself
2d8d4543	109	}
	110
	111	//______________________________________________________________________________
	112	void THerwig6::GenerateEvent()
	113	{
	114
	115	//initialize event
	116	hwuine_();
	117	// generate hard subprocess
	118	hwepro_();
	119	// generate parton cascades
	120	hwbgen_();
	121	// do heavy objects decay
	122	hwdhob_();
	123	// do cluster formation
	124	hwcfor_();
	125	// do cluster decays
	126	hwcdec_();
	127	// do unstable particle decays
	128	hwdhad_();
	129	// do heavy flavor hadrons decay
	130	hwdhvy_();
	131	// add soft underlying event
	132	hwmevt_();
	133	// finish event
	134	hwufne_();
	135	}
	136
	137	//______________________________________________________________________________
	138	void THerwig6::OpenFortranFile(int lun, char* name) {
	139	herwig6_open_fortran_file_(&lun, name, strlen(name));
	140	}
	141
	142	//______________________________________________________________________________
	143	void THerwig6::CloseFortranFile(int lun) {
	144	herwig6_close_fortran_file_(&lun);
	145	}
	146
	147	void THerwig6::Initialize(const char beam, const char target, double pbeam1, double pbeam2, int iproc)
	148
	149	{
	150	// perform the initialization for Herwig6
	151	// sets correct title.
	152	// after calling this method all parameters are set to their default
	153	// values. If you want to modify any parameter you have to set the new
	154	// value after calling Initialize and before PrepareRun.
	155
	156	char cbeam[8];
	157	strncpy(cbeam,beam,8);
	158	char ctarget[8];
	159	strncpy(ctarget,target,8);
	160	printf("\n Initializing Herwig !! \n");
	161	if ( (!strncmp(beam, "E+" ,2)) &&
	162	(!strncmp(beam, "E-" ,2)) &&
	163	(!strncmp(beam, "MU+" ,3)) &&
	164	(!strncmp(beam, "MU-" ,3)) &&
	165	(!strncmp(beam, "NUE" ,3)) &&
	166	(!strncmp(beam, "NUEB" ,4)) &&
	167	(!strncmp(beam, "NUMU" ,4)) &&
	168	(!strncmp(beam, "NMUB" ,4)) &&
	169	(!strncmp(beam, "NTAU" ,4)) &&
	170	(!strncmp(beam, "NTAB" ,4)) &&
	171	(!strncmp(beam, "GAMA" ,4)) &&
	172	(!strncmp(beam, "P ",8)) &&
173	(!strncmp(beam, "PBAR ",8)) &&
174	(!strncmp(beam, "N" ,1)) &&
175	(!strncmp(beam, "NBAR" ,4)) &&
176	(!strncmp(beam, "PI+" ,3)) &&
177	(!strncmp(beam, "PI-" ,3)) ) {
178	printf("WARNING! In THerwig6:Initialize():\n");
179	printf(" specified beam=%s is unrecognized .\n",beam);
180	printf(" resetting to \"P\" .");
181	sprintf(cbeam,"P");
182	}
183
184	if ( (!strncmp(target, "E+" ,2)) &&
185	(!strncmp(target, "E-" ,2)) &&
186	(!strncmp(target, "MU+" ,3)) &&
187	(!strncmp(target, "MU-" ,3)) &&
188	(!strncmp(target, "NUE" ,3)) &&
189	(!strncmp(target, "NUEB" ,4)) &&
190	(!strncmp(target, "NUMU" ,4)) &&
191	(!strncmp(target, "NMUB" ,4)) &&
192	(!strncmp(target, "NTAU" ,4)) &&
193	(!strncmp(target, "NTAB" ,4)) &&
194	(!strncmp(target, "GAMA" ,4)) &&
195	(!strncmp(target, "P ",8)) &&
196	(!strncmp(target, "PBAR ",8)) &&
197	(!strncmp(target, "N" ,1)) &&
198	(!strncmp(target, "NBAR" ,4)) &&
199	(!strncmp(target, "PI+" ,3)) &&
200	(!strncmp(target, "PI-" ,3)) ) {
201	printf("WARNING! In THerwig6:Initialize():\n");
202	printf(" specified target=%s is unrecognized .\n",target);
203	printf(" resetting to \"P\" .");
204	sprintf(ctarget,"P");
205	}
206
207	// initialization:
208	// type of beams
209	strncpy(fHwbmch->PART1,beam,8);
210	strncpy(fHwbmch->PART2,target,8);
211	// momentum of beams
212	fHwproc->PBEAM1=pbeam1;
213	fHwproc->PBEAM2=pbeam2;
214	// process to generate
215	fHwproc->IPROC=iproc;
216	// not used in the class definition
217	fHwproc->MAXEV=1;
218
219	// reset all parameters
220	hwigin_();
221
222	// set correct title
223	char atitle[132];
224	double win=pbeam1+pbeam2;
225	printf("\n %s - %s at %g GeV",beam,target,win);
226	sprintf(atitle,"%s-%s at %g GeV",cbeam,ctarget,win);
227	SetTitle(atitle);
228	}
229
230	void THerwig6::PrepareRun()
231	{
232	// compute parameter dependent constants
233	hwuinc_();
234	// initialize elementary processes
235	hweini_();
236	}
237
238	//______________________________________________________________________________
239	TObjArray* THerwig6::ImportParticles(Option_t *option)
240	{
241	//
242	// Default primary creation method. It reads the /HEPEVT/ common block which
243	// has been filled by the GenerateEvent method. If the event generator does
244	// not use the HEPEVT common block, This routine has to be overloaded by
245	// the subclasses.
246	// The default action is to store only the stable particles (ISTHEP = 1)
247	// This can be demanded explicitly by setting the option = "Final"
248	// If the option = "All", all the particles are stored.
249	//
250	fParticles->Clear();
251	Int_t numpart = fHepevt->NHEP;
252	TClonesArray &a = ((TClonesArray)fParticles);
253	if (!strcmp(option,"") \|\| !strcmp(option,"Final")) {
254	for (Int_t i = 0; i<=numpart; i++) {
255	if (fHepevt->ISTHEP[i] == 1) {
256	//
257	// Use the common block values for the TParticle constructor
258	//
259	new(a[i]) TParticle(
260	fHepevt->IDHEP[i],
261	fHepevt->ISTHEP[i],
262	fHepevt->JMOHEP[i][0]-1,
263	fHepevt->JMOHEP[i][1]-1,
264	fHepevt->JDAHEP[i][0]-1,
265	fHepevt->JDAHEP[i][1]-1,
266
267	fHepevt->PHEP[i][0],
268	fHepevt->PHEP[i][1],
269	fHepevt->PHEP[i][2],
270	fHepevt->PHEP[i][3],
271	fHepevt->VHEP[i][0],
272	fHepevt->VHEP[i][1],
273	fHepevt->VHEP[i][2],
274	fHepevt->VHEP[i][3]);
275	}
276	}
277	}
278	else if (!strcmp(option,"All")) {
279	for (Int_t i = 0; i<=numpart; i++) {
280	new(a[i]) TParticle(
281	fHepevt->IDHEP[i],
282	fHepevt->ISTHEP[i],
283	fHepevt->JMOHEP[i][0]-1,
284	fHepevt->JMOHEP[i][1]-1,
285	fHepevt->JDAHEP[i][0]-1,
286	fHepevt->JDAHEP[i][1]-1,
287
288	fHepevt->PHEP[i][0],
289	fHepevt->PHEP[i][1],
290	fHepevt->PHEP[i][2],
291	fHepevt->PHEP[i][3],
292	fHepevt->VHEP[i][0],
293	fHepevt->VHEP[i][1],
294	fHepevt->VHEP[i][2],
295	fHepevt->VHEP[i][3]);
296	}
297	}
298	return fParticles;
299	}
300
301	//______________________________________________________________________________
302	Int_t THerwig6::ImportParticles(TClonesArray particles, Option_t option)
303	{
304	//
305	// Default primary creation method. It reads the /HEPEVT/ common block which
306	// has been filled by the GenerateEvent method. If the event generator does
307	// not use the HEPEVT common block, This routine has to be overloaded by
308	// the subclasses.
309	// The function loops on the generated particles and store them in
310	// the TClonesArray pointed by the argument particles.
311	// The default action is to store only the stable particles (ISTHEP = 1)
312	// This can be demanded explicitly by setting the option = "Final"
313	// If the option = "All", all the particles are stored.
314	//
315	if (particles == 0) return 0;
884ccf6a	316	TClonesArray &refParticles = *particles;
884ccf6a	317	refParticles.Clear();
2d8d4543	318	Int_t numpart = fHepevt->NHEP;
	319	if (!strcmp(option,"") \|\| !strcmp(option,"Final")) {
	320	for (Int_t i = 0; i< numpart; i++) {
	321	if (fHepevt->ISTHEP[i] == 1) {
	322	//
	323	// Use the common block values for the TParticle constructor
	324	//
884ccf6a	325	new(refParticles[i]) TParticle(
2d8d4543	326	fHepevt->IDHEP[i],
	327	fHepevt->ISTHEP[i],
	328	fHepevt->JMOHEP[i][0]-1,
	329	fHepevt->JMOHEP[i][1]-1,
	330	fHepevt->JDAHEP[i][0]-1,
	331	fHepevt->JDAHEP[i][1]-1,
	332
	333	fHepevt->PHEP[i][0],
	334	fHepevt->PHEP[i][1],
	335	fHepevt->PHEP[i][2],
	336	fHepevt->PHEP[i][3],
	337	fHepevt->VHEP[i][0],
	338	fHepevt->VHEP[i][1],
	339	fHepevt->VHEP[i][2],
	340	fHepevt->VHEP[i][3]);
	341	}
	342	}
	343	}
	344	else if (!strcmp(option,"All")) {
	345	for (Int_t i = 0; i< numpart; i++) {
884ccf6a	346	new(refParticles[i]) TParticle(
2d8d4543	347	fHepevt->IDHEP[i],
	348	fHepevt->ISTHEP[i],
	349	fHepevt->JMOHEP[i][0]-1,
	350	fHepevt->JMOHEP[i][1]-1,
	351	fHepevt->JDAHEP[i][0]-1,
	352	fHepevt->JDAHEP[i][1]-1,
	353
	354	fHepevt->PHEP[i][0],
	355	fHepevt->PHEP[i][1],
	356	fHepevt->PHEP[i][2],
	357	fHepevt->PHEP[i][3],
	358	fHepevt->VHEP[i][0],
	359	fHepevt->VHEP[i][1],
	360	fHepevt->VHEP[i][2],
	361	fHepevt->VHEP[i][3]);
	362	}
	363	}
	364	return numpart;
	365	}
	366
	367	void THerwig6::Hwigin()
	368	{
	369	hwigin_();
	370	}
	371
	372	void THerwig6::Hwuinc()
	373	{
	374	hwuinc_();
	375	}
	376
	377	void THerwig6::Hwusta(char* name)
	378
	379	{
	380	hwusta_(name,8);
	381	}
	382
	383	void THerwig6::Hweini()
	384
	385	{
	386	hweini_();
	387	}
	388
	389	void THerwig6::Hwuine()
	390
	391	{
	392	hwuine_();
	393	}
	394
	395	void THerwig6::Hwepro()
	396
	397	{
	398	hwepro_();
	399	}
	400
	401	void THerwig6::Hwbgen()
	402
	403	{
	404	hwbgen_();
	405	}
	406
	407	void THerwig6::Hwdhob()
	408
	409	{
	410	hwdhob_();
411	}
412
413	void THerwig6::Hwcfor()
414
415	{
416	hwcfor_();
417	}
418
419	void THerwig6::Hwcdec()
420
421	{
422	hwcdec_();
423	}
424
425	void THerwig6::Hwdhad()
426
427	{
428	hwdhad_();
429	}
430
431	void THerwig6::Hwdhvy()
432
433	{
434	hwdhvy_();
435	}
436
437	void THerwig6::Hwmevt()
438
439	{
440	hwmevt_();
441	}
442
443	void THerwig6::Hwufne()
444
445	{
446	hwufne_();
447	}
448
449	void THerwig6::Hwefin()
450
451	{
452	hwefin_();
453	}
454
455	void THerwig6::SetupTest()
456	{
457	// exampe of running herwig and generating one event
458	// after changing some options
459	Initialize("P","PBAR",900.,900.,1500);
460	// here you can set some parameters
461	SetPTMIN(15.); // Min pt in hadronic jet production
462	SetYJMIN(-4.); // Min jet rapidity
463	SetYJMAX(4.); // Max jet rapidity
464	// after you set your wished parameters
465	// herwig can do its work
466	PrepareRun();
884ccf6a	467	int nEvToGenerate=1;
884ccf6a	468	for (int i=0;i<nEvToGenerate;i++)
2d8d4543	469	{
	470	GenerateEvent();
	471	// do your stuff. For ex:
884ccf6a	472	int nOfPar=GetNumberOfParticles(); // from TGenerator
884ccf6a	473	for (int j=0; j<nOfPar; j++)
2d8d4543	474	{
	475	TParticle* p=GetParticle(j);
	476	// here you do whatever you want with the particle
	477	p->Print();
	478	};
	479	};
	480	}
	481
	482
	483
	484
	485