1 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
2 * See cxx source for full Copyright notice */
3 // Implementation of the interface for THBTprocessor
4 // Author: Piotr Krzysztof Skowronski <Piotr.Skowronski@cern.ch>
5 //////////////////////////////////////////////////////////////////////////////////
6 //Wrapper class for "hbt processor" after burner
7 //The origibal code is written in fortran by Lanny Ray
8 //and is put in the directory $ALICE_ROOT/HBTprocessor
9 //Detailed description is on the top of the file hbt_event_processor.f
11 //This class can be used ONLY with AliGenCocktailAfterBurner wrapper generator
14 // AliGenCocktailAfterBurner = gener = new AliGenCocktailAfterBurner();
15 // gener->SetPhiRange(0, 360); //Set global parameters
16 // gener->SetThetaRange(35., 145.);
17 // AliGenHIJINGpara *hijing = new AliGenHIJINGpara(10000); //Add some generator
18 // hijing->SetMomentumRange(0, 999);
19 // gener->AddGenerator(hijing,"HIJING PARAMETRIZATION",1);
21 // AliGenHBTprocessor *hbtp = new AliGenHBTprocessor(); //create object
22 // hbtp->SetRefControl(2); //set parameters
23 // hbtp->SetSwitch1D(1);
24 // hbtp->SetR0(6);//fm - radius
25 // hbtp->SetLambda(0.7);//chaocity parameter
26 // gener->AddAfterBurner(hbtp,"HBT PROCESSOR",1); //add to the main generator
31 // A) HBT PROCESSOR NEEDS MORE THAN ONE EVENT TO WORK
32 // AS MORE AS IT BETTER WORKS
33 // B) IT IS ABLE TO "ADD" CORRELATIONS ONLY UP TO TWO PARTICLE TYPES AT ONES
36 // Artificial particle dennsity enhancment feature
37 // HBT Processor is unable to process correctly low multiplicity particles
38 // even if the high statistics (more events) is supplied.
39 // For that reason was implemented artificial multiplicity enhancement
40 // - see also comments in HBT Processor source file (HBTP/hbt_event_processor.f)
41 // or web page (http://alisoft.cern.ch/people/skowron/hbtprocessor/hbteventprocessor.html)
42 // concerning trk_accep or SetTrackRejectionFactor method in this class
43 // Fortran is cheated by masking several events a single one. Number is defined by fEventMerge
44 // variable. In case it is equal to 1, there is no masking and the feature is off.
45 // But, for example if it is 5, and we have 100 events, number of events passed to fortran is 100/5=20
46 // When fortran asks about multiplcity of event, let sey, 1 - multiplicity of events 5 to 9 is summed up
50 //////////////////////////////////////////////////////////////////////////////////
52 // 11.11.2001 Piotr Skowronski
53 // Setting seed (date) in RNG in the constructor
55 // 09.10.2001 Piotr Skowronski
57 // Theta - Eta cohernecy facilities added:
58 // AliGenerator::SetThetaRange method overriden
59 // Static methods added
65 // Class description comments put on proper place
67 // 27.09.2001 Piotr Skowronski
68 // removing of redefinition of defaults velues
69 // in method's implementation.
73 #include "AliGenHBTprocessor.h"
75 #include <TParticle.h>
76 #include "THBTprocessor.h"
80 #include "AliGenCocktailAfterBurner.h"
85 ClassImp(AliGenHBTprocessor)
87 Int_t AliGenHBTprocessor::fgDebug = 0;
88 static TRandom* gAliRandom;//RNG to be used by the fortran code
90 AliGenCocktailAfterBurner* GetGenerator();
91 /*******************************************************************/
93 AliGenHBTprocessor::AliGenHBTprocessor():
98 fTrackRejectionFactor(0),
110 fEventLineCounter(0),
164 // Standard constructor
165 // Sets default veues of all parameters
167 SetName("AliGenHBTprocessor");
168 SetTitle("AliGenHBTprocessor");
170 gAliRandom = fRandom;
171 fHBTprocessor = new THBTprocessor();
176 SetTrackRejectionFactor();
196 SetSwitchCoherence();
198 SetSwitchFermiBose();
199 //SetMomentumRange();
212 SetNBins1DFineMesh();
213 SetBinSize1DFineMesh();
214 SetNBins1DCoarseMesh();
215 SetBinSize1DCoarseMesh();
216 SetNBins3DFineMesh();
217 SetBinSize3DFineMesh();
218 SetNBins3DCoarseMesh();
219 SetBinSize3DCoarseMesh();
220 SetNBins3DFineProjectMesh();
223 /*******************************************************************/
226 /*******************************************************************/
228 AliGenHBTprocessor::~AliGenHBTprocessor()
232 if (fHBTprocessor) delete fHBTprocessor; //delete generator
236 /*******************************************************************/
238 void AliGenHBTprocessor::InitStatusCodes()
240 //creates and inits status codes array to zero
241 AliGenCocktailAfterBurner *cab = GetGenerator();
244 Fatal("InitStatusCodes()","Can not find AliGenCocktailAfterBurner generator");
248 Int_t nev = cab->GetNumberOfEvents();
250 fHbtPStatCodes = new Int_t* [nev];
251 for( Int_t i =0; i<nev;i++)
253 Int_t nprim = cab->GetStack(i)->GetNprimary();
254 fHbtPStatCodes[i] = new Int_t[nprim];
255 for (Int_t k =0 ;k<nprim;k++)
256 fHbtPStatCodes[i][k] =0;
261 /*******************************************************************/
263 void AliGenHBTprocessor::CleanStatusCodes()
265 //Cleans up status codes
268 for (Int_t i =0; i<GetGenerator()->GetNumberOfEvents(); i++)
269 delete [] fHbtPStatCodes[i];
270 delete [] fHbtPStatCodes;
275 /*******************************************************************/
277 void AliGenHBTprocessor::Init()
279 //sets up parameters in generator
281 THBTprocessor *thbtp = fHBTprocessor;
284 thbtp->SetTrackRejectionFactor(fTrackRejectionFactor);
285 thbtp->SetRefControl(fReferenceControl);
287 if ((fPid[0] == fPid[1]) || (fPid[0] == 0) || (fPid[1] == 0))
290 thbtp->SetPIDs(IdFromPDG(fPid[1]) ,0);
292 thbtp->SetPIDs(IdFromPDG(fPid[0]) ,0);
293 thbtp->SetNPIDtypes(1);
296 Warning("AliGenHBTprocessor::Init","\nThere is only one particle type set,\n\
297 and Switch_Type differnt then 1,\n which does not make sense.\n\
298 Setting it to 1.\n");
304 thbtp->SetPIDs(IdFromPDG(fPid[0]) ,IdFromPDG(fPid[1]));
306 thbtp->SetSwitchType(fSwitchType);
309 thbtp->SetMaxIterations(fMaxit);
310 thbtp->SetDelChi(fDelchi);
311 thbtp->SetIRand(fIrand);
312 thbtp->SetLambda(fLambda);
314 thbtp->SetRSide(fRside);
315 thbtp->SetROut(fRout);
316 thbtp->SetRLong(fRlong);
317 thbtp->SetRPerp(fRperp);
318 thbtp->SetRParallel(fRparallel);
321 thbtp->SetSwitch1D(fSwitch1d);
322 thbtp->SetSwitch3D(fSwitch3d);
323 thbtp->SetSwitchType(fSwitchType);
324 thbtp->SetSwitchCoherence(fSwitchCoherence);
325 thbtp->SetSwitchCoulomb(fSwitchCoulomb);
326 thbtp->SetSwitchFermiBose(fSwitchFermiBose);
327 thbtp->SetPtRange(fPtMin,fPtMax);
328 thbtp->SetPxRange(fPxMin,fPxMax);
329 thbtp->SetPyRange(fPyMin,fPyMax);
330 thbtp->SetPzRange(fPzMin,fPzMax);
331 thbtp->SetPhiRange(fPhiMin*180./((Float_t)TMath::Pi())+180.0, //casting is because if fPhiMin = 180.0 then
332 fPhiMax*180./((Float_t)TMath::Pi())+180.0);//TMath::Pi() != TMath::Pi()*fPhiMin/180.0,
333 thbtp->SetEtaRange(fEtaMin,fEtaMax);
334 thbtp->SetNPtBins(fNPtBins);
335 thbtp->SetNPhiBins(fNPhiBins);
336 thbtp->SetNEtaBins(fNEtaBins);
337 thbtp->SetNPxBins(fNPxBins);
338 thbtp->SetNPyBins(fNPyBins);
339 thbtp->SetNPzBins(fNPzBins);
340 thbtp->SetNBins1DFineMesh(fN1dFine);
341 thbtp->SetBinSize1DFineMesh(fBinsize1dFine);
342 thbtp->SetNBins1DCoarseMesh(fN1dCoarse);
343 thbtp->SetBinSize1DCoarseMesh(fBinsize1dCoarse);
344 thbtp->SetNBins3DFineMesh(fN3dFine);
345 thbtp->SetBinSize3DFineMesh(fBinsize3dFine);
346 thbtp->SetNBins3DCoarseMesh(fN3dCoarse);
347 thbtp->SetBinSize3DCoarseMesh(fBinsize3dCoarse);
348 thbtp->SetNBins3DFineProjectMesh(fN3dFineProject);
350 thbtp->SetPrintFull(fPrintFull);
353 /*******************************************************************/
355 void AliGenHBTprocessor::Generate()
358 AliGenCocktailAfterBurner* cab = GetGenerator();
361 Fatal("Generate()","AliGenHBTprocessor needs AliGenCocktailAfterBurner to be main generator");
364 if (cab->GetNumberOfEvents() <2)
367 "HBT Processor needs more than 1 event to work properly,\
368 but there is only %d set", cab->GetNumberOfEvents());
372 fHBTprocessor->Initialize(); //reset all fields of common blocks
373 //in case there are many HBT processors
374 //run one after one (i.e. in AliCocktailAfterBurner)
375 //between Init() called and Generate there might
376 Init(); //be different instance running - be sure that we have our settings
378 InitStatusCodes(); //Init status codes
380 fHBTprocessor->GenerateEvent(); //Generates event
382 CleanStatusCodes(); //Clean Status codes - thet are not needed anymore
385 /*******************************************************************/
388 /*******************************************************************/
389 void AliGenHBTprocessor::GetParticles(TClonesArray * particles) const
394 Error("GetParticles","Particles has to be initialized");
397 fHBTprocessor->ImportParticles(particles);
400 /*******************************************************************/
402 Int_t AliGenHBTprocessor::GetHbtPStatusCode(Int_t part) const
404 //returns the status code of the given particle in the active event
405 //see SetActiveEvent in the bottom of AliGenHBTprocessor.cxx
406 //and in AliCocktailAfterBurner
408 GetTrackEventIndex(part,ev,idx);
409 if ( (ev<0) || (idx<0) )
411 Error("GetHbtPStatusCode","GetTrackEventIndex returned error");
414 return fHbtPStatCodes[ev][idx];
418 /*******************************************************************/
419 void AliGenHBTprocessor::SetHbtPStatusCode(Int_t hbtstatcode, Int_t part)
421 //Sets the given status code to given particle number (part) in the active event
423 GetTrackEventIndex(part,ev,idx);
424 if ( (ev<0) || (idx<0) )
426 Error("GetHbtPStatusCode","GetTrackEventIndex returned error");
429 else fHbtPStatCodes[ev][idx] = hbtstatcode;
432 /*******************************************************************/
434 void AliGenHBTprocessor::SetTrackRejectionFactor(Float_t trf) //def 1.0
436 //Sets the Track Rejection Factor
437 //variates in range 0.0 <-> 1.0
438 //Describes the factor of particles rejected from the output.
439 //Used only in case of low muliplicity particles e.g. lambdas.
440 //Processor generates addisional particles and builds the
441 //correletions on such a statistics.
442 //At the end these particels are left in the event according
443 //to this factor: 1==all particles are left
444 // 0==all are removed
446 fTrackRejectionFactor=trf;
447 fHBTprocessor->SetTrackRejectionFactor(trf);
449 /*******************************************************************/
451 void AliGenHBTprocessor::SetRefControl(Int_t rc) //default 2
453 //Sets the Refernce Control Switch
454 //switch wether read reference histograms from file =1
455 // compute from input events =2 - default
456 fReferenceControl=rc;
457 fHBTprocessor->SetRefControl(rc);
459 /*******************************************************************/
461 void AliGenHBTprocessor::SetPIDs(Int_t pid1,Int_t pid2)
464 //Sets PDG Codes of particles to be processed, default \\Pi^{+} and \\Pi^{-}
465 //This method accepts PDG codes which is
466 //in opposite to THBBProcessor which accepts GEANT PID
467 if ( (pid1 == 0) && (pid2 == 0) )
469 Error("AliGenHBTprocessor::SetPIDs","Sensless Particle Types setting: 0 0, Ignoring\n");
477 fHBTprocessor->SetPIDs(IdFromPDG(pid1) ,0);
483 fHBTprocessor->SetPIDs(IdFromPDG(pid1) ,IdFromPDG(pid2));
487 /*******************************************************************/
489 void AliGenHBTprocessor::SetNPIDtypes(Int_t npidt)
491 //Number ofparticle types to be processed - default 2
492 //see AliGenHBTprocessor::SetPIDs
495 fHBTprocessor->SetNPIDtypes(npidt);
497 /*******************************************************************/
499 void AliGenHBTprocessor::SetDeltap(Float_t deltp)
502 //maximum range for random momentum shifts in GeV/c;
503 //px,py,pz independent; Default = 0.1 GeV/c.
505 fHBTprocessor->SetDeltap(deltp);
507 /*******************************************************************/
509 void AliGenHBTprocessor::SetMaxIterations(Int_t maxiter)
511 //maximum # allowed iterations thru all the
512 //tracks for each event. Default = 50.
513 //If maxit=0, then calculate the correlations
514 //for the input set of events without doing the
515 //track adjustment procedure.
518 fHBTprocessor->SetMaxIterations(maxiter);
521 /*******************************************************************/
522 void AliGenHBTprocessor::SetDelChi(Float_t dc)
524 //min % change in total chi-square for which
525 //the track adjustment iterations may stop,
529 fHBTprocessor->SetDelChi(dc);
531 /*******************************************************************/
533 void AliGenHBTprocessor::SetIRand(Int_t irnd)
535 //if fact dummy - used only for compatibility
536 //we are using AliRoot built in RNG
537 //dummy in fact since we are using aliroot build-in RNG
538 //Sets renaodom number generator
540 fHBTprocessor->SetIRand(irnd);
542 /*******************************************************************/
544 void AliGenHBTprocessor::SetLambda(Float_t lam)
547 // Sets Chaoticity Parameter
549 fHBTprocessor->SetLambda(lam);
551 /*******************************************************************/
552 void AliGenHBTprocessor::SetR1d(Float_t r)
555 //Sets Spherical source model radius (fm)
557 fHBTprocessor->SetR1d(r);
559 /*******************************************************************/
560 void AliGenHBTprocessor::SetRSide(Float_t rs)
563 //Rside,Rout,Rlong = Non-spherical Bertsch-Pratt source model (fm)
566 fHBTprocessor->SetRSide(rs);
568 /*******************************************************************/
569 void AliGenHBTprocessor::SetROut(Float_t ro)
572 //Rside,Rout,Rlong = Non-spherical Bertsch-Pratt source model (fm)
574 fHBTprocessor->SetROut(ro);
576 /*******************************************************************/
577 void AliGenHBTprocessor::SetRLong(Float_t rl)
580 //Rside,Rout,Rlong = Non-spherical Bertsch-Pratt source model (fm)
582 fHBTprocessor->SetRLong(rl);
584 /*******************************************************************/
585 void AliGenHBTprocessor::SetRPerp(Float_t rp)
588 //Rperp,Rparallel,R0= Non-spherical Yano-Koonin-Podgoretski source model (fm).
590 fHBTprocessor->SetRPerp(rp);
592 /*******************************************************************/
593 void AliGenHBTprocessor::SetRParallel(Float_t rprl)
596 //Rperp,Rparallel,R0= Non-spherical Yano-Koonin-Podgoretski source model (fm).
598 fHBTprocessor->SetRParallel(rprl);
600 /*******************************************************************/
601 void AliGenHBTprocessor::SetR0(Float_t r0)
604 //Rperp,Rparallel,R0= Non-spherical Yano-Koonin-Podgoretski source model (fm).
606 fHBTprocessor->SetR0(r0);
608 /*******************************************************************/
609 void AliGenHBTprocessor::SetQ0(Float_t q0)
612 //Sets Q0 = NA35 Coulomb parameter for finite source size in (GeV/c)
613 // if fSwitchCoulomb = 2
614 // = Spherical Coulomb source radius in (fm)
615 // if switchCoulomb = 3, used to interpolate the
616 // input Pratt/Cramer discrete Coulomb source
619 fHBTprocessor->SetQ0(q0);
622 /*******************************************************************/
623 void AliGenHBTprocessor::SetSwitch1D(Int_t s1d)
627 // = 0 to not compute the 1D two-body //orrelations.
628 // = 1 to compute this using Q-invariant
629 // = 2 to compute this using Q-total
630 // = 3 to compute this using Q-3-ve//tor
633 fHBTprocessor->SetSwitch1D(s1d);
635 /*******************************************************************/
636 void AliGenHBTprocessor::SetSwitch3D(Int_t s3d)
640 // = 0 to not compute the 3D two-body correlations.
641 // = 1 to compute this using the side-out-long form
642 // = 2 to compute this using the Yanno-Koonin-Pogoredskij form.
645 fHBTprocessor->SetSwitch3D(s3d);
647 /*******************************************************************/
648 void AliGenHBTprocessor::SetSwitchType(Int_t st)
651 // Sets switch_type = 1 to fit only the like pair correlations
652 // = 2 to fit only the unlike pair correlations
653 // = 3 to fit both the like and unlike pair correl.
654 //See SetPIDs and Init
655 //If only one particle type is set, unly==1 makes sens
658 fHBTprocessor->SetSwitchType(st);
660 /*******************************************************************/
661 void AliGenHBTprocessor::SetSwitchCoherence(Int_t sc)
664 // switchCoherence = 0 for purely incoherent source (but can have
666 // = 1 for mixed incoherent and coherent source
668 fSwitchCoherence = sc;
669 fHBTprocessor->SetSwitchCoherence(sc);
671 /*******************************************************************/
672 void AliGenHBTprocessor::SetSwitchCoulomb(Int_t scol)
675 // switchCoulomb = 0 no Coulomb correction
676 // = 1 Point source Gamow correction only
677 // = 2 NA35 finite source size correction
678 // = 3 Pratt/Cramer finite source size correction;
679 // interpolated from input tables.
680 fSwitchCoulomb =scol;
681 fHBTprocessor->SetSwitchCoulomb(scol);
683 /*******************************************************************/
684 void AliGenHBTprocessor::SetSwitchFermiBose(Int_t sfb)
687 // switchFermiBose = 1 Boson pairs
688 // = -1 Fermion pairs
690 fSwitchFermiBose = sfb;
691 fHBTprocessor->SetSwitchFermiBose(sfb);
693 /*******************************************************************/
694 void AliGenHBTprocessor::SetPtRange(Float_t ptmin, Float_t ptmax)
696 // default ptmin = 0.1, ptmax = 0.98
697 //Sets Pt range (GeV)
698 AliGenerator::SetPtRange(ptmin,ptmax);
699 fHBTprocessor->SetPtRange(ptmin,ptmax);
702 /*******************************************************************/
703 void AliGenHBTprocessor::SetPxRange(Float_t pxmin, Float_t pxmax)
705 //default pxmin = -1.0, pxmax = 1.0
709 fHBTprocessor->SetPxRange(pxmin,pxmax);
711 /*******************************************************************/
712 void AliGenHBTprocessor::SetPyRange(Float_t pymin, Float_t pymax)
714 //default pymin = -1.0, pymax = 1.0
718 fHBTprocessor->SetPyRange(pymin,pymax);
720 /*******************************************************************/
721 void AliGenHBTprocessor::SetPzRange(Float_t pzmin, Float_t pzmax)
723 //default pzmin = -3.6, pzmax = 3.6
727 fHBTprocessor->SetPzRange(pzmin,pzmax);
729 void AliGenHBTprocessor::SetMomentumRange(Float_t /*pmin*/, Float_t /*pmax*/)
731 //default pmin=0, pmax=0
732 //Do not use this method!
733 MayNotUse("AliGenHBTprocessor::SetMomentumRange Method is Dummy");
736 /*******************************************************************/
737 void AliGenHBTprocessor::SetPhiRange(Float_t phimin, Float_t phimax)
741 AliGenerator::SetPhiRange(phimin,phimax);
743 fHBTprocessor->SetPhiRange(phimin+180.0,phimax+180.0);
745 /*******************************************************************/
746 void AliGenHBTprocessor::SetEtaRange(Float_t etamin, Float_t etamax)
748 //default etamin = -1.5, etamax = 1.5
752 fHBTprocessor->SetEtaRange(etamin,etamax);
754 //set the azimothal angle range in the AliGeneraor -
755 //to keep coherency between azimuthal angle and pseudorapidity
756 //DO NOT CALL this->SetThetaRange, because it calls this method (where we are)
757 //which must cause INFINITE LOOP
758 AliGenerator::SetThetaRange(RadiansToDegrees(EtaToTheta(fEtaMin)),
759 RadiansToDegrees(EtaToTheta(fEtaMax)));
762 /*******************************************************************/
763 void AliGenHBTprocessor::SetThetaRange(Float_t thetamin, Float_t thetamax)
765 //default thetamin = 0, thetamax = 180
766 //Azimuthal angle, override AliGenerator method which uses widely (i.e. wrapper generators)
767 //core fortran HBTProcessor uses Eta (pseudorapidity)
768 //so these methods has to be synchronized
770 AliGenerator::SetThetaRange(thetamin,thetamax);
772 SetEtaRange( ThetaToEta(fThetaMin) , ThetaToEta(fThetaMax) );
776 /*******************************************************************/
777 void AliGenHBTprocessor::SetNPtBins(Int_t nptbin)
779 //default nptbin = 50
780 //set number of Pt bins
782 fHBTprocessor->SetNPtBins(nptbin);
784 /*******************************************************************/
785 void AliGenHBTprocessor::SetNPhiBins(Int_t nphibin)
787 //default nphibin = 50
788 //set number of Phi bins
790 fHBTprocessor->SetNPhiBins(nphibin);
792 /*******************************************************************/
793 void AliGenHBTprocessor::SetNEtaBins(Int_t netabin)
795 //default netabin = 50
796 //set number of Eta bins
798 fHBTprocessor->SetNEtaBins(netabin);
800 /*******************************************************************/
801 void AliGenHBTprocessor::SetNPxBins(Int_t npxbin)
803 //default npxbin = 20
804 //set number of Px bins
806 fHBTprocessor->SetNPxBins(npxbin);
808 /*******************************************************************/
809 void AliGenHBTprocessor::SetNPyBins(Int_t npybin)
811 //default npybin = 20
812 //set number of Py bins
814 fHBTprocessor->SetNPyBins(npybin);
816 /*******************************************************************/
817 void AliGenHBTprocessor::SetNPzBins(Int_t npzbin)
819 //default npzbin = 70
820 //set number of Pz bins
822 fHBTprocessor->SetNPzBins(npzbin);
824 /*******************************************************************/
825 void AliGenHBTprocessor::SetNBins1DFineMesh(Int_t n)
828 //Sets the number of bins in the 1D mesh
830 fHBTprocessor->SetNBins1DFineMesh(n);
833 /*******************************************************************/
834 void AliGenHBTprocessor::SetBinSize1DFineMesh(Float_t x)
837 //Sets the bin size in the 1D mesh
839 fHBTprocessor->SetBinSize1DFineMesh(x);
841 /*******************************************************************/
843 void AliGenHBTprocessor::SetNBins1DCoarseMesh(Int_t n)
846 //Sets the number of bins in the coarse 1D mesh
848 fHBTprocessor->SetNBins1DCoarseMesh(n);
850 /*******************************************************************/
851 void AliGenHBTprocessor::SetBinSize1DCoarseMesh(Float_t x)
854 //Sets the bin size in the coarse 1D mesh
856 fHBTprocessor->SetBinSize1DCoarseMesh(x);
858 /*******************************************************************/
860 void AliGenHBTprocessor::SetNBins3DFineMesh(Int_t n)
863 //Sets the number of bins in the 3D mesh
865 fHBTprocessor->SetNBins3DFineMesh(n);
867 /*******************************************************************/
868 void AliGenHBTprocessor::SetBinSize3DFineMesh(Float_t x)
871 //Sets the bin size in the 3D mesh
873 fHBTprocessor->SetBinSize3DFineMesh(x);
875 /*******************************************************************/
877 void AliGenHBTprocessor::SetNBins3DCoarseMesh(Int_t n)
880 //Sets the number of bins in the coarse 3D mesh
883 fHBTprocessor->SetNBins3DCoarseMesh(n);
885 /*******************************************************************/
886 void AliGenHBTprocessor::SetBinSize3DCoarseMesh(Float_t x)
889 //Sets the bin size in the coarse 3D mesh
890 fBinsize3dCoarse = x;
891 fHBTprocessor->SetBinSize3DCoarseMesh(x);
893 /*******************************************************************/
895 void AliGenHBTprocessor::SetNBins3DFineProjectMesh(Int_t n )
898 //Sets the number of bins in the fine project mesh
900 fHBTprocessor->SetNBins3DFineProjectMesh(n);
902 /*******************************************************************/
903 void AliGenHBTprocessor::SetPrintFull(Int_t flag)
905 //sets the print full flag
907 fHBTprocessor->SetPrintFull(flag);
911 /*******************************************************************/
913 Int_t AliGenHBTprocessor::GetNumberOfEvents()
915 //returns number of available events
916 AliGenerator* g = gAlice->GetMCApp()->Generator();
917 AliGenCocktailAfterBurner* cab = (g)?dynamic_cast<AliGenCocktailAfterBurner*>(g):0x0;
920 Fatal("GetNumberOfEvents","Master Generator is not an AliGenCocktailAfterBurner");
923 return (Int_t)TMath::Ceil(cab->GetNumberOfEvents()/((Float_t)fEventMerge));
926 /*******************************************************************/
928 void AliGenHBTprocessor::SetActiveEventNumber(Int_t n)
930 //sets the active event
931 fActiveStack = n*fEventMerge;
932 AliDebug(1,Form("Settimg active event %d passed %d",fActiveStack,n));
934 /*******************************************************************/
936 Int_t AliGenHBTprocessor::GetNumberOfTracks()
938 //returns number of tracks in active event
939 AliGenerator* g = gAlice->GetMCApp()->Generator();
940 AliGenCocktailAfterBurner* cab = (g)?dynamic_cast<AliGenCocktailAfterBurner*>(g):0x0;
943 Fatal("GetNumberOfEvents","Master Generator is not an AliGenCocktailAfterBurner");
947 for (Int_t i = fActiveStack;i < fActiveStack+fEventMerge; i++)
949 if (i >= GetNumberOfEvents()) break; //protection not to overshoot nb of events
950 AliStack* stack = cab->GetStack(i);
952 Error("GetNumberOfTracks","There is no stack %d",i);
955 n+=stack->GetNprimary();
959 /*******************************************************************/
961 void AliGenHBTprocessor::SetNEventsToMerge(Int_t nev)
963 //sets number of events to merge
964 if (nev > 0 ) fEventMerge = nev;
966 /*******************************************************************/
968 TParticle* AliGenHBTprocessor::GetTrack(Int_t n)
970 //returns track that hbtp thinks is n in active event
971 AliDebug(5,Form("n = %d",n));
972 AliGenerator* g = gAlice->GetMCApp()->Generator();
973 AliGenCocktailAfterBurner* cab = (g)?dynamic_cast<AliGenCocktailAfterBurner*>(g):0x0;
976 Fatal("GetTrackEventIndex","Master Generator is not an AliGenCocktailAfterBurner");
981 GetTrackEventIndex(n,ev,idx);
982 AliDebug(5,Form("Event = %d Particle = %d",ev,idx));
983 if ( (ev<0) || (idx<0) )
985 Error("GetTrack","GetTrackEventIndex returned error");
988 AliDebug(5,Form("Number of Tracks in Event(%d) = %d",ev,cab->GetStack(ev)->GetNprimary()));
989 return cab->GetStack(ev)->Particle(idx);//safe - in case stack does not exist
991 /*******************************************************************/
993 void AliGenHBTprocessor::GetTrackEventIndex(Int_t n, Int_t &evno, Int_t &index) const
995 //returns event(stack) number and particle index
996 AliGenerator* g = gAlice->GetMCApp()->Generator();
997 AliGenCocktailAfterBurner* cab = (g)?dynamic_cast<AliGenCocktailAfterBurner*>(g):0x0;
1000 Fatal("GetTrackEventIndex","Master Generator is not an AliGenCocktailAfterBurner");
1006 for (Int_t i = fActiveStack;i < fActiveStack+fEventMerge; i++)
1008 AliStack* stack = cab->GetStack(i);
1011 Error("GetTrackEventIndex","There is no stack %d",i);
1015 Int_t ntracks = stack->GetNprimary();
1016 AliDebug(10,Form("Event %d has %d tracks. n = %d",i,ntracks,n));
1030 Error("GetTrackEventIndex","Could not find given track");
1033 /*******************************************************************/
1034 /*******************************************************************/
1035 /*******************************************************************/
1041 void AliGenHBTprocessor::DefineParticles()
1044 // Load standard numbers for GEANT particles and PDG conversion
1045 fNPDGCodes = 0; //this is done in the constructor - but in any case ...
1047 fPDGCode[fNPDGCodes++]=-99; // 0 = unused location
1048 fPDGCode[fNPDGCodes++]=22; // 1 = photon
1049 fPDGCode[fNPDGCodes++]=-11; // 2 = positron
1050 fPDGCode[fNPDGCodes++]=11; // 3 = electron
1051 fPDGCode[fNPDGCodes++]=12; // 4 = neutrino e
1052 fPDGCode[fNPDGCodes++]=-13; // 5 = muon +
1053 fPDGCode[fNPDGCodes++]=13; // 6 = muon -
1054 fPDGCode[fNPDGCodes++]=111; // 7 = pi0
1055 fPDGCode[fNPDGCodes++]=211; // 8 = pi+
1056 fPDGCode[fNPDGCodes++]=-211; // 9 = pi-
1057 fPDGCode[fNPDGCodes++]=130; // 10 = Kaon Long
1058 fPDGCode[fNPDGCodes++]=321; // 11 = Kaon +
1059 fPDGCode[fNPDGCodes++]=-321; // 12 = Kaon -
1060 fPDGCode[fNPDGCodes++]=2112; // 13 = Neutron
1061 fPDGCode[fNPDGCodes++]=2212; // 14 = Proton
1062 fPDGCode[fNPDGCodes++]=-2212; // 15 = Anti Proton
1063 fPDGCode[fNPDGCodes++]=310; // 16 = Kaon Short
1064 fPDGCode[fNPDGCodes++]=221; // 17 = Eta
1065 fPDGCode[fNPDGCodes++]=3122; // 18 = Lambda
1066 fPDGCode[fNPDGCodes++]=3222; // 19 = Sigma +
1067 fPDGCode[fNPDGCodes++]=3212; // 20 = Sigma 0
1068 fPDGCode[fNPDGCodes++]=3112; // 21 = Sigma -
1069 fPDGCode[fNPDGCodes++]=3322; // 22 = Xi0
1070 fPDGCode[fNPDGCodes++]=3312; // 23 = Xi-
1071 fPDGCode[fNPDGCodes++]=3334; // 24 = Omega-
1072 fPDGCode[fNPDGCodes++]=-2112; // 25 = Anti Proton
1073 fPDGCode[fNPDGCodes++]=-3122; // 26 = Anti Proton
1074 fPDGCode[fNPDGCodes++]=-3222; // 27 = Anti Sigma -
1075 fPDGCode[fNPDGCodes++]=-3212; // 28 = Anti Sigma 0
1076 fPDGCode[fNPDGCodes++]=-3112; // 29 = Anti Sigma 0
1077 fPDGCode[fNPDGCodes++]=-3322; // 30 = Anti Xi 0
1078 fPDGCode[fNPDGCodes++]=-3312; // 31 = Anti Xi +
1079 fPDGCode[fNPDGCodes++]=-3334; // 32 = Anti Omega +
1082 /*******************************************************************/
1083 Int_t AliGenHBTprocessor::IdFromPDG(Int_t pdg) const
1086 // Return Geant3 code from PDG and pseudo ENDF code
1088 for(Int_t i=0;i<fNPDGCodes;++i)
1089 if(pdg==fPDGCode[i]) return i;
1092 Int_t AliGenHBTprocessor::PDGFromId(Int_t id) const
1095 // Return PDG code and pseudo ENDF code from Geant3 code
1097 if(id>0 && id<fNPDGCodes) return fPDGCode[id];
1100 Double_t AliGenHBTprocessor::ThetaToEta(Double_t arg)
1102 //converts etha(azimuthal angle) to Eta (pseudorapidity). Argument in radians
1104 if(arg>= TMath::Pi()) return 708.0;//This number is the biggest wich not crashes exp(x)
1105 if(arg<= 0.0) return -708.0;//
1106 if(arg == TMath::Pi()/2.) return 0.0;//
1110 return TMath::Log( TMath::Tan(arg/2.)) ;
1114 return -TMath::Log( TMath::Tan(-arg/2.)) ;
1118 /*******************************************************************/
1119 /****** ROUTINES USED FOR COMMUNUCATION ********/
1120 /******************** WITH FORTRAN ********************/
1121 /*******************************************************************/
1124 # define hbtpran hbtpran_
1125 # define alihbtp_puttrack alihbtp_puttrack_
1126 # define alihbtp_gettrack alihbtp_gettrack_
1127 # define alihbtp_getnumberevents alihbtp_getnumberevents_
1128 # define alihbtp_getnumbertracks alihbtp_getnumbertracks_
1129 # define alihbtp_initialize alihbtp_initialize_
1130 # define alihbtp_setactiveeventnumber alihbtp_setactiveeventnumber_
1131 # define alihbtp_setparameters alihbtp_setparameters_
1132 # define type_ofCall
1135 # define hbtpran HBTPRAN
1136 # define alihbtp_puttrack ALIHBTP_PUTTRACK
1137 # define alihbtp_gettrack ALIHBTP_GETTRACK
1138 # define alihbtp_getnumberevents ALIHBTP_GETNUMBEREVENTS
1139 # define alihbtp_getnumbertracks ALIHBTP_GETNUMBERTRACKS
1140 # define alihbtp_initialize ALIHBTP_INITIALIZE
1141 # define alihbtp_setactiveeventnumber ALIHBTP_SETACTIVEEVENTNUMBER
1142 # define alihbtp_setparameters ALIHBTP_SETPARAMETERS
1143 # define type_ofCall _stdcall
1146 /*******************************************************************/
1148 AliGenCocktailAfterBurner* GetGenerator()
1150 // This function has two tasks:
1151 // Check if environment is OK (exist gAlice and generator)
1152 // Returns pointer to genrator
1153 //to be changed with TFolders
1157 ::Error("AliGenHBTprocessor.cxx: GetGenerator()",
1158 "There is NO gALICE! Check what you are doing!");
1159 ::Fatal("AliGenHBTprocessor.cxx: GetGenerator()",
1160 "Running HBT Processor without gAlice... Exiting \n");
1161 return 0x0;//pro forma
1163 AliGenerator * gen = gAlice->GetMCApp()->Generator();
1167 ::Fatal("AliGenHBTprocessor.cxx: GetGenerator()",
1168 "There is no generator in gAlice, exiting\n");
1172 //we do not sure actual type of the genetator
1173 //and simple casting is risky - we use ROOT machinery to do safe cast
1175 TClass* cabclass = AliGenCocktailAfterBurner::Class(); //get AliGenCocktailAfterBurner TClass
1176 TClass* genclass = gen->IsA();//get TClass of the generator we got from galice
1177 //use casting implemented in TClass
1178 //cast gen to cabclass
1179 AliGenCocktailAfterBurner* cab=(AliGenCocktailAfterBurner*)genclass->DynamicCast(cabclass,gen);
1181 if (cab == 0x0)//if generator that we got is not AliGenCocktailAfterBurner or its descendant we get null
1182 { //then quit with error
1183 ::Fatal("AliGenHBTprocessor.cxx: GetGenerator()",
1184 "The main Generator is not a AliGenCocktailAfterBurner, exiting\n");
1189 /*******************************************************************/
1191 AliGenHBTprocessor* GetAliGenHBTprocessor()
1193 //returns pointer to the current instance of AliGenHBTprocessor in
1194 //AliGenCocktailAfterBurner (can be more than one)
1196 AliGenCocktailAfterBurner* gen = GetGenerator();
1197 AliGenerator* g = gen->GetCurrentGenerator();
1200 ::Fatal("AliGenHBTprocessor.cxx: GetAliGenHBTprocessor()",
1201 "Can not get the current generator. Exiting");
1202 return 0x0;//pro forma
1205 TClass* hbtpclass = AliGenHBTprocessor::Class(); //get AliGenCocktailAfterBurner TClass
1206 TClass* gclass = g->IsA();//get TClass of the current generator we got from CAB
1207 AliGenHBTprocessor* hbtp = (AliGenHBTprocessor*)gclass->DynamicCast(hbtpclass,g);//try to cast
1210 ::Fatal("AliGenHBTprocessor.cxx: GetAliGenHBTprocessor()",
1211 "\nCurrernt generator in AliGenCocktailAfterBurner is not a AliGenHBTprocessor, exiting\n");
1217 /*******************************************************************/
1218 extern "C" void type_ofCall alihbtp_setparameters()
1223 extern "C" void type_ofCall alihbtp_initialize()
1228 /*******************************************************************/
1230 extern "C" void type_ofCall alihbtp_getnumberevents(Int_t &nev)
1232 //passes number of events to the fortran
1233 if(AliGenHBTprocessor::GetDebug())
1234 AliInfoGeneral("alihbtp_getnumberevents",Form("(%d) ....",nev));
1236 AliGenHBTprocessor* gen = GetAliGenHBTprocessor();//we dont check because it is done in function
1237 nev = gen->GetNumberOfEvents();
1239 if(AliGenHBTprocessor::GetDebug()>5)
1240 AliInfoGeneral("alihbtp_getnumberevents",Form("EXITED N Ev = %d",nev));
1243 /*******************************************************************/
1245 extern "C" void type_ofCall alihbtp_setactiveeventnumber(Int_t & nev)
1247 //sets active event in generator (AliGenCocktailAfterBurner)
1249 if(AliGenHBTprocessor::GetDebug()>5)
1250 ::Info("AliGenHBTpocessor.cxx: alihbtp_setactiveeventnumber","(%d)",nev);
1251 if(AliGenHBTprocessor::GetDebug()>0)
1252 ::Info("AliGenHBTpocessor.cxx: alihbtp_setactiveeventnumber","Asked for event %d",nev-1);
1254 AliGenHBTprocessor* gen = GetAliGenHBTprocessor();//we dont check because it is done in function
1256 gen->SetActiveEventNumber(nev - 1); //fortran numerates events from 1 to N
1258 if(AliGenHBTprocessor::GetDebug()>5)
1259 ::Info("AliGenHBTpocessor.cxx: alihbtp_setactiveeventnumber","EXITED returned %d",nev);
1261 /*******************************************************************/
1263 extern "C" void type_ofCall alihbtp_getnumbertracks(Int_t &ntracks)
1265 //passes number of particles in active event to the fortran
1266 if(AliGenHBTprocessor::GetDebug()>5)
1267 ::Info("AliGenHBTpocessor.cxx: alihbtp_getnumbertracks","(%d)",ntracks);
1269 AliGenHBTprocessor* gen = GetAliGenHBTprocessor();//we dont check because it is done in function
1271 ntracks = gen->GetNumberOfTracks();
1272 if(AliGenHBTprocessor::GetDebug()>5)
1273 ::Info("AliGenHBTpocessor.cxx: alihbtp_getnumbertracks","EXITED Ntracks = %d",ntracks);
1276 /*******************************************************************/
1278 extern "C" void type_ofCall
1279 alihbtp_puttrack(Int_t & n,Int_t& flag, Float_t& px,
1280 Float_t& py, Float_t& pz, Int_t& geantpid)
1282 //sets new parameters (momenta) in track number n
1283 // in the active event
1284 // n - number of the track in active event
1285 // flag - flag of the track
1286 // px,py,pz - momenta
1287 // geantpid - type of the particle - Geant Particle ID
1289 if(AliGenHBTprocessor::GetDebug()>5)
1290 ::Info("AliGenHBTpocessor.cxx: alihbtp_puttrack","(%d)",n);
1292 AliGenHBTprocessor* gen = GetAliGenHBTprocessor();//we dont check because it is done in function
1294 TParticle * track = gen->GetTrack(n-1);
1297 ::Error("AliGenHBTprocessor.cxx","Can not get track from AliGenHBTprocessor");
1301 //check to be deleted
1302 if (geantpid != (gen->IdFromPDG( track->GetPdgCode() )))
1304 ::Error("AliGenHBTprocessor.cxx: alihbtp_puttrack",
1305 "SOMETHING IS GOING BAD:\n GEANTPIDS ARE NOT THE SAME");
1308 if(AliGenHBTprocessor::GetDebug()>0)
1309 if (px != track->Px())
1310 ::Info("AliGenHBTprocessor.cxx: alihbtp_puttrack",
1311 "Px diff. = %f", px - track->Px());
1313 if(AliGenHBTprocessor::GetDebug()>3)
1314 ::Info("AliGenHBTprocessor.cxx: alihbtp_puttrack",
1315 "track->GetPdgCode() --> %d",track->GetPdgCode());
1319 Float_t m = track->GetMass();
1320 Float_t e = TMath::Sqrt(m*m+px*px+py*py+pz*pz);
1321 track->SetMomentum(px,py,pz,e);
1323 gen->SetHbtPStatusCode(flag,n-1);
1325 if(AliGenHBTprocessor::GetDebug()>5) ::Info("AliGenHBTprocessor.cxx: alihbtp_puttrack","EXITED ");
1328 /*******************************************************************/
1330 extern "C" void type_ofCall
1331 alihbtp_gettrack(Int_t & n,Int_t & flag, Float_t & px,
1332 Float_t & py, Float_t & pz, Int_t & geantpid)
1335 //passes track parameters to the fortran
1336 // n - number of the track in active event
1337 // flag - flag of the track
1338 // px,py,pz - momenta
1339 // geantpid - type of the particle - Geant Particle ID
1341 if(AliGenHBTprocessor::GetDebug()>5) ::Info("AliGenHBTprocessor.cxx: alihbtp_gettrack","(%d)",n);
1342 AliGenHBTprocessor* g = GetAliGenHBTprocessor();
1344 TParticle * track = g->GetTrack(n-1);
1346 flag = g->GetHbtPStatusCode(n-1);
1348 px = (Float_t)track->Px();
1349 py = (Float_t)track->Py();
1350 pz = (Float_t)track->Pz();
1352 geantpid = g->IdFromPDG( track->GetPdgCode() );
1354 if(AliGenHBTprocessor::GetDebug()>5) ::Info("AliGenHBTprocessor.cxx: alihbtp_gettrack","EXITED");
1357 /*******************************************************************/
1358 extern "C" Float_t type_ofCall hbtpran(Int_t &)
1360 //interface to the random number generator
1361 return gAliRandom->Rndm();
1364 /*******************************************************************/
1367 /*******************************************************************/