/*
$Log$
+Revision 1.40 2002/02/12 11:05:53 morsch
+Get daughter indices right.
+
+Revision 1.39 2002/02/12 09:16:39 morsch
+Correction in SelectFlavor()
+
+Revision 1.38 2002/02/12 08:53:21 morsch
+SetNoGammas can be used to inhibit writing of gammas and pi0.
+
+Revision 1.37 2002/02/08 16:50:50 morsch
+Add name and title in constructor.
+
+Revision 1.36 2002/01/31 20:17:55 morsch
+Allow for triggered jets with simplified topology: Exact pT, back-to-back
+
+Revision 1.35 2001/12/13 07:56:25 hristov
+Set pointers to zero in the default constructor
+
+Revision 1.34 2001/12/11 16:55:42 morsch
+Correct initialization for jet phi-range.
+
+Revision 1.33 2001/12/05 10:18:51 morsch
+Possibility of kinematic biasing of jet phi range. (J. Klay)
+
+Revision 1.32 2001/11/28 13:51:11 morsch
+Introduce kinematic biasing (etamin, etamax) of jet trigger. Bookkeeping
+(number of trials) done in AliGenHijingEventHeader.
+
+Revision 1.31 2001/11/06 12:30:34 morsch
+Add Boost() method to boost all particles to LHC lab frame. Needed for asymmetric collision systems.
+
+Revision 1.30 2001/10/21 18:35:56 hristov
+Several pointers were set to zero in the default constructors to avoid memory management problems
+
+Revision 1.29 2001/10/15 08:12:24 morsch
+- Vertex smearing with truncated gaussian.
+- Store triggered jet info before and after final state radiation into mc-heade
+
+Revision 1.28 2001/10/08 11:55:25 morsch
+Store 4-momenta of trigegred jets in event header.
+Possibility to switch of initial and final state radiation.
+
+Revision 1.27 2001/10/08 07:13:14 morsch
+Add setter for minimum transverse momentum of triggered jet.
+
+Revision 1.26 2001/10/04 08:12:24 morsch
+Redefinition of stable condition.
+
+Revision 1.25 2001/07/27 17:09:36 morsch
+Use local SetTrack, KeepTrack and SetHighWaterMark methods
+to delegate either to local stack or to stack owned by AliRun.
+(Piotr Skowronski, A.M.)
+
+Revision 1.24 2001/07/20 09:34:56 morsch
+Count the number of spectator neutrons and protons and add information
+to the event header. (Chiara Oppedisano)
+
+Revision 1.23 2001/07/13 17:30:22 morsch
+Derive from AliGenMC.
+
+Revision 1.22 2001/06/11 13:09:23 morsch
+- Store cross-Section and number of binary collisions as a function of impact parameter
+- Pass AliGenHijingEventHeader to gAlice.
+
+Revision 1.21 2001/02/28 17:35:24 morsch
+Consider elastic interactions (ks = 1 and ks = 11) as spectator (Chiara Oppedisano)
+
+Revision 1.20 2001/02/14 15:50:40 hristov
+The last particle in event marked using SetHighWaterMark
+
+Revision 1.19 2000/12/21 16:24:06 morsch
+Coding convention clean-up
+
+Revision 1.18 2000/12/06 17:46:30 morsch
+Avoid random numbers 1 and 0.
+
Revision 1.17 2000/12/04 11:22:03 morsch
Init of sRandom as in 1.15
*/
+
+
+// Generator using HIJING as an external generator
+// The main HIJING options are accessable for the user through this interface.
+// Uses the THijing implementation of TGenerator.
+//
+// andreas.morsch@cern.ch
+
#include "AliGenHijing.h"
#include "AliGenHijingEventHeader.h"
#include "AliRun.h"
+#include "AliPDG.h"
#include <TArrayI.h>
#include <TParticle.h>
#include <THijing.h>
+#include <TGraph.h>
+#include <TLorentzVector.h>
ClassImp(AliGenHijing)
AliGenHijing::AliGenHijing()
- :AliGenerator()
+ :AliGenMC()
{
// Constructor
+ fHijing = 0;
+ fDsigmaDb = 0;
+ fDnDb = 0;
}
AliGenHijing::AliGenHijing(Int_t npart)
- :AliGenerator(npart)
+ :AliGenMC(npart)
{
// Default PbPb collisions at 5. 5 TeV
//
+ fName = "Hijing";
+ fTitle= "Particle Generator using HIJING";
+
SetEnergyCMS();
SetImpactParameterRange();
SetTarget();
SetProjectile();
- fKeep=0;
- fQuench=1;
- fShadowing=1;
- fTrigger=0;
- fDecaysOff=1;
- fEvaluate=0;
- fSelectAll=0;
- fFlavor=0;
- fSpectators=1;
+ SetBoostLHC();
+ SetJetEtaRange();
+ SetJetPhiRange();
+
+ fKeep = 0;
+ fQuench = 1;
+ fShadowing = 1;
+ fTrigger = 0;
+ fDecaysOff = 1;
+ fEvaluate = 0;
+ fSelectAll = 0;
+ fFlavor = 0;
+ fSpectators = 1;
+ fDsigmaDb = 0;
+ fDnDb = 0;
+ fPtMinJet = -2.5;
+ fRadiation = 1;
+ fEventVertex.Set(3);
+//
+ SetSimpleJets();
+ SetNoGammas();
+
//
// Set random number generator
sRandom = fRandom;
+ fHijing = 0;
+
}
AliGenHijing::AliGenHijing(const AliGenHijing & Hijing)
AliGenHijing::~AliGenHijing()
{
// Destructor
+ if ( fDsigmaDb) delete fDsigmaDb;
+ if ( fDnDb) delete fDnDb;
}
void AliGenHijing::Init()
fMinImpactParam, fMaxImpactParam));
fHijing=(THijing*) fgMCEvGen;
-
+ fHijing->SetIHPR2(2, fRadiation);
fHijing->SetIHPR2(3, fTrigger);
- fHijing->SetIHPR2(4, fQuench);
fHijing->SetIHPR2(6, fShadowing);
fHijing->SetIHPR2(12, fDecaysOff);
fHijing->SetIHPR2(21, fKeep);
- fHijing->Rluset(50,0);
- fHijing->Initialize();
-
+ fHijing->SetHIPR1(10, fPtMinJet);
+ fHijing->SetHIPR1(50, fSimpleJet);
+//
+// Quenching
+//
+//
+// fQuench = 0: no quenching
+// fQuench = 1: hijing default
+// fQuench = 2: new LHC parameters for HIPR1(11) and HIPR1(14)
+// fQuench = 3: new RHIC parameters for HIPR1(11) and HIPR1(14)
+// fQuench = 4: new LHC parameters with log(e) dependence
+// fQuench = 5: new RHIC parameters with log(e) dependence
+ fHijing->SetIHPR2(50, 0);
+ if (fQuench > 0)
+ fHijing->SetIHPR2(4, 1);
+ else
+ fHijing->SetIHPR2(4, 0);
+// New LHC parameters from Xin-Nian Wang
+ if (fQuench == 2) {
+ fHijing->SetHIPR1(14, 1.1);
+ fHijing->SetHIPR1(11, 3.7);
+ } else if (fQuench == 3) {
+ fHijing->SetHIPR1(14, 0.20);
+ fHijing->SetHIPR1(11, 2.5);
+ } else if (fQuench == 4) {
+ fHijing->SetIHPR2(50, 1);
+ fHijing->SetHIPR1(14, 4.*0.34);
+ fHijing->SetHIPR1(11, 3.7);
+ } else if (fQuench == 5) {
+ fHijing->SetIHPR2(50, 1);
+ fHijing->SetHIPR1(14, 0.34);
+ fHijing->SetHIPR1(11, 2.5);
+ }
+
+
+//
+// Initialize Hijing
+//
+ fHijing->Initialize();
//
if (fEvaluate) EvaluateCrossSections();
//
{
// Generate one event
- Float_t polar[3] = {0,0,0};
- Float_t origin[3]= {0,0,0};
- Float_t origin0[3]= {0,0,0};
- Float_t p[3], random[6];
- Float_t tof;
+ Float_t polar[3] = {0,0,0};
+ Float_t origin[3] = {0,0,0};
+ Float_t origin0[3] = {0,0,0};
+ Float_t p[3], random[6];
+ Float_t tof;
- static TClonesArray *particles;
+ static TClonesArray *particles;
// converts from mm/c to s
- const Float_t kconv=0.001/2.999792458e8;
+ const Float_t kconv = 0.001/2.999792458e8;
//
- Int_t nt=0;
- Int_t jev=0;
- Int_t j, kf, ks, imo;
- kf=0;
+ Int_t nt = 0;
+ Int_t jev = 0;
+ Int_t j, kf, ks, imo;
+ kf = 0;
- if(!particles) particles=new TClonesArray("TParticle",10000);
+ if(!particles) particles = new TClonesArray("TParticle",10000);
- fTrials=0;
- for (j=0;j<3;j++) origin0[j]=fOrigin[j];
- if(fVertexSmear==kPerEvent) {
- Rndm(random,6);
- for (j=0;j<3;j++) {
- origin0[j]+=fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())*
- TMath::Sqrt(-2*TMath::Log(random[2*j+1]));
+ fTrials = 0;
+ for (j = 0;j < 3; j++) origin0[j] = fOrigin[j];
+ if(fVertexSmear == kPerEvent) {
+ Float_t dv[3];
+ dv[2] = 1.e10;
+ while(TMath::Abs(dv[2]) > fCutVertexZ*fOsigma[2]) {
+ Rndm(random,6);
+ for (j=0; j < 3; j++) {
+ dv[j] = fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())*
+ TMath::Sqrt(-2*TMath::Log(random[2*j+1]));
+ }
+ }
+ for (j=0; j < 3; j++) origin0[j] += dv[j];
+ } else if (fVertexSmear == kPerTrack) {
// fHijing->SetMSTP(151,0);
- }
- } else if (fVertexSmear==kPerTrack) {
-// fHijing->SetMSTP(151,0);
- for (j=0;j<3;j++) {
-// fHijing->SetPARP(151+j, fOsigma[j]*10.);
- }
- }
- while(1)
- {
-
- fHijing->GenerateEvent();
- fTrials++;
- fHijing->ImportParticles(particles,"All");
- Int_t np = particles->GetEntriesFast();
- printf("\n **************************************************%d\n",np);
- Int_t nc=0;
- if (np == 0 ) continue;
- Int_t i;
- Int_t * newPos = new Int_t[np];
-
- for (i = 0; i<np; i++) *(newPos+i)=i;
+ for (j = 0; j < 3; j++) {
+// fHijing->SetPARP(151+j, fOsigma[j]*10.);
+ }
+ }
+ while(1)
+ {
+// Generate one event
+// --------------------------------------------------------------------------
+ fSpecn = 0;
+ fSpecp = 0;
+// --------------------------------------------------------------------------
+ fHijing->GenerateEvent();
+ fTrials++;
+ if (fTrigger != kNoTrigger) {
+ if (!CheckTrigger()) continue;
+ }
+
+ fHijing->ImportParticles(particles,"All");
+ if (fLHC) Boost(particles);
+
+
+ Int_t np = particles->GetEntriesFast();
+ printf("\n **************************************************%d\n",np);
+ Int_t nc = 0;
+ if (np == 0 ) continue;
+ Int_t i;
+ Int_t* newPos = new Int_t[np];
+ Int_t* pSelected = new Int_t[np];
+
+ for (i = 0; i < np; i++) {
+ newPos[i] = i;
+ pSelected[i] = 0;
+ }
+
+// Get event vertex
//
-// First write parent particles
+ TParticle * iparticle = (TParticle *) particles->At(0);
+ fEventVertex[0] = origin0[0];
+ fEventVertex[1] = origin0[1];
+ fEventVertex[2] = origin0[2];
+
+//
+// First select parent particles
//
- for (i = 0; i<np; i++) {
- TParticle * iparticle = (TParticle *) particles->At(i);
+ for (i = 0; i < np; i++) {
+ iparticle = (TParticle *) particles->At(i);
// Is this a parent particle ?
- if (Stable(iparticle)) continue;
+ if (Stable(iparticle)) continue;
//
- Bool_t hasMother = (iparticle->GetFirstMother() >=0);
- Bool_t selected = kTRUE;
- Bool_t hasSelectedDaughters = kFALSE;
-
+ Bool_t selected = kTRUE;
+ Bool_t hasSelectedDaughters = kFALSE;
+
+
+ kf = iparticle->GetPdgCode();
+ ks = iparticle->GetStatusCode();
+ if (kf == 92) continue;
- kf = iparticle->GetPdgCode();
- ks = iparticle->GetStatusCode();
- if (kf == 92) continue;
-
- if (!fSelectAll) selected = KinematicSelection(iparticle)&&SelectFlavor(kf);
- hasSelectedDaughters = DaughtersSelection(iparticle, particles);
-//
-// Put particle on the stack if it is either selected or it is the mother of at least one seleted particle
-//
- if (selected || hasSelectedDaughters) {
- nc++;
- p[0]=iparticle->Px();
- p[1]=iparticle->Py();
- p[2]=iparticle->Pz();
- origin[0]=origin0[0]+iparticle->Vx()/10;
- origin[1]=origin0[1]+iparticle->Vy()/10;
- origin[2]=origin0[2]+iparticle->Vz()/10;
- tof=kconv*iparticle->T();
- imo=-1;
- if (hasMother) {
- imo=iparticle->GetFirstMother();
- TParticle* mother= (TParticle *) particles->At(imo);
- imo = (mother->GetPdgCode() != 92) ? imo=*(newPos+imo) : -1;
- }
-// Put particle on the stack ...
-// printf("\n set track mother: %d %d %d %d %d %d ",i,imo, kf, nt+1, selected, hasSelectedDaughters);
-
- gAlice->SetTrack(0,imo,kf,p,origin,polar,
- tof,kPPrimary,nt);
-// ... and keep it there
- gAlice->KeepTrack(nt);
-//
- *(newPos+i)=nt;
- } // selected
- } // particle loop parents
-//
-// Now write the final state particles
-//
-
- for (i = 0; i<np; i++) {
- TParticle * iparticle = (TParticle *) particles->At(i);
-// Is this a final state particle ?
- if (!Stable(iparticle)) continue;
-//
- Bool_t hasMother = (iparticle->GetFirstMother() >=0);
- Bool_t selected = kTRUE;
- kf = iparticle->GetPdgCode();
- ks = iparticle->GetStatusCode();
- if (!fSelectAll) {
- selected = KinematicSelection(iparticle)&&SelectFlavor(kf);
- if (!fSpectators && selected) selected = (ks != 0 && ks != 10);
- }
-//
-// Put particle on the stack if selected
+ if (!fSelectAll) selected = KinematicSelection(iparticle, 0) &&
+ SelectFlavor(kf);
+ hasSelectedDaughters = DaughtersSelection(iparticle, particles);
//
- if (selected) {
- nc++;
- p[0]=iparticle->Px();
- p[1]=iparticle->Py();
- p[2]=iparticle->Pz();
- origin[0]=origin0[0]+iparticle->Vx()/10;
- origin[1]=origin0[1]+iparticle->Vy()/10;
- origin[2]=origin0[2]+iparticle->Vz()/10;
- tof=kconv*iparticle->T();
- imo=-1;
-
- if (hasMother) {
- imo=iparticle->GetFirstMother();
- TParticle* mother= (TParticle *) particles->At(imo);
- imo = (mother->GetPdgCode() != 92) ? imo=*(newPos+imo) : -1;
- }
-// Put particle on the stack
- gAlice->SetTrack(fTrackIt,imo,kf,p,origin,polar,
- tof,kPNoProcess,nt);
-// tof,"Secondary",nt);
-
-// printf("\n set track final: %d %d %d",imo, kf, nt);
- gAlice->KeepTrack(nt);
- *(newPos+i)=nt;
- } // selected
- } // particle loop final state
-
- delete newPos;
-
- printf("\n I've put %i particles on the stack \n",nc);
- if (nc > 0) {
- jev+=nc;
- if (jev >= fNpart || fNpart == -1) {
- fKineBias=Float_t(fNpart)/Float_t(fTrials);
- printf("\n Trials: %i %i %i\n",fTrials, fNpart, jev);
- break;
- }
- }
- } // event loop
- fHijing->Rluget(50,-1);
-}
-
-Bool_t AliGenHijing::KinematicSelection(TParticle *particle)
-{
-// Perform kinematic selection
- Double_t px=particle->Px();
- Double_t py=particle->Py();
- Double_t pz=particle->Pz();
- Double_t e=particle->Energy();
-
+// Put particle on the stack if it is either selected or
+// it is the mother of at least one seleted particle
//
-// transverse momentum cut
- Double_t pt=TMath::Sqrt(px*px+py*py);
- if (pt > fPtMax || pt < fPtMin)
- {
-// printf("\n failed pt cut %f %f %f \n",pt,fPtMin,fPtMax);
- return kFALSE;
- }
+ if (selected || hasSelectedDaughters) {
+ nc++;
+ pSelected[i] = 1;
+ } // selected
+ } // particle loop parents
//
-// momentum cut
- Double_t p=TMath::Sqrt(px*px+py*py+pz*pz);
- if (p > fPMax || p < fPMin)
- {
-// printf("\n failed p cut %f %f %f \n",p,fPMin,fPMax);
- return kFALSE;
- }
-
+// Now select the final state particles
//
-// theta cut
- Double_t theta = Double_t(TMath::ATan2(Double_t(pt),Double_t(pz)));
- if (theta > fThetaMax || theta < fThetaMin)
- {
-
-// printf("\n failed theta cut %f %f %f \n",theta,fThetaMin,fThetaMax);
- return kFALSE;
- }
+ for (i = 0; i<np; i++) {
+ TParticle * iparticle = (TParticle *) particles->At(i);
+// Is this a final state particle ?
+ if (!Stable(iparticle)) continue;
+
+ Bool_t selected = kTRUE;
+ kf = iparticle->GetPdgCode();
+ ks = iparticle->GetStatusCode();
+// --------------------------------------------------------------------------
+// Count spectator neutrons and protons
+ if(ks == 0 || ks == 1 || ks == 10 || ks == 11){
+ if(kf == kNeutron) fSpecn += 1;
+ if(kf == kProton) fSpecp += 1;
+ }
+// --------------------------------------------------------------------------
+//
+ if (!fSelectAll) {
+ selected = KinematicSelection(iparticle,0)&&SelectFlavor(kf);
+ if (!fSpectators && selected) selected = (ks != 0 && ks != 1 && ks != 10
+ && ks != 11);
+ }
//
-// rapidity cut
- Double_t y;
- if(e<=pz) y = 99;
- else if (e<=-pz) y = -99;
- else y = 0.5*TMath::Log((e+pz)/(e-pz));
- if (y > fYMax || y < fYMin)
- {
-// printf("\n failed y cut %f %f %f \n",y,fYMin,fYMax);
- return kFALSE;
- }
-
+// Put particle on the stack if selected
//
-// phi cut
- Double_t phi=Double_t(TMath::ATan2(Double_t(py),Double_t(px)));
- if (phi > fPhiMax || phi < fPhiMin)
- {
-// printf("\n failed phi cut %f %f %f \n",phi,fPhiMin,fPhiMax);
- return kFALSE;
- }
-
- return kTRUE;
+ if (selected) {
+ nc++;
+ pSelected[i] = 1;
+ } // selected
+ } // particle loop final state
+//
+// Write particles to stack
+//
+ for (i = 0; i<np; i++) {
+ TParticle * iparticle = (TParticle *) particles->At(i);
+ Bool_t hasMother = (iparticle->GetFirstMother() >=0);
+ Bool_t hasDaughter = (iparticle->GetFirstDaughter() >=0);
+
+ if (pSelected[i]) {
+ kf = iparticle->GetPdgCode();
+ p[0] = iparticle->Px();
+ p[1] = iparticle->Py();
+ p[2] = iparticle->Pz();
+ origin[0] = origin0[0]+iparticle->Vx()/10;
+ origin[1] = origin0[1]+iparticle->Vy()/10;
+ origin[2] = origin0[2]+iparticle->Vz()/10;
+ tof = kconv*iparticle->T();
+ imo = -1;
+ TParticle* mother = 0;
+ if (hasMother) {
+ imo = iparticle->GetFirstMother();
+ mother = (TParticle *) particles->At(imo);
+ imo = (mother->GetPdgCode() != 92) ? imo = newPos[imo] : -1;
+ } // if has mother
+ Bool_t tFlag = (fTrackIt && !hasDaughter);
+ SetTrack(tFlag,imo,kf,p,origin,polar,
+ tof,kPNoProcess,nt);
+ KeepTrack(nt);
+ newPos[i] = nt;
+ } // if selected
+ } // particle loop
+ delete[] newPos;
+ delete[] pSelected;
+
+ printf("\n I've put %i particles on the stack \n",nc);
+ if (nc > 0) {
+ jev += nc;
+ if (jev >= fNpart || fNpart == -1) {
+ fKineBias = Float_t(fNpart)/Float_t(fTrials);
+ printf("\n Trials: %i %i %i\n",fTrials, fNpart, jev);
+ break;
+ }
+ }
+ } // event loop
+ MakeHeader();
+ SetHighWaterMark(nt);
}
void AliGenHijing::KeepFullEvent()
{
// Glauber Calculation of geometrical x-section
//
- Float_t xTot=0.; // barn
- Float_t xTotHard=0.; // barn
- Float_t xPart=0.; // barn
- Float_t xPartHard=0.; // barn
- Float_t sigmaHard=0.1; // mbarn
- Float_t bMin=0.;
- Float_t bMax=fHijing->GetHIPR1(34)+fHijing->GetHIPR1(35);
- const Float_t kdib=0.2;
- Int_t kMax=Int_t((bMax-bMin)/kdib)+1;
+ Float_t xTot = 0.; // barn
+ Float_t xTotHard = 0.; // barn
+ Float_t xPart = 0.; // barn
+ Float_t xPartHard = 0.; // barn
+ Float_t sigmaHard = 0.1; // mbarn
+ Float_t bMin = 0.;
+ Float_t bMax = fHijing->GetHIPR1(34)+fHijing->GetHIPR1(35);
+ const Float_t kdib = 0.2;
+ Int_t kMax = Int_t((bMax-bMin)/kdib)+1;
printf("\n Projectile Radius (fm): %f \n",fHijing->GetHIPR1(34));
printf("\n Target Radius (fm): %f \n",fHijing->GetHIPR1(35));
Int_t i;
- Float_t oldvalue=0.;
+ Float_t oldvalue= 0.;
+
+ Float_t* b = new Float_t[kMax];
+ Float_t* si1 = new Float_t[kMax];
+ Float_t* si2 = new Float_t[kMax];
- for (i=0; i<kMax; i++)
+ for (i = 0; i < kMax; i++)
{
- Float_t xb=bMin+i*kdib;
+ Float_t xb = bMin+i*kdib;
Float_t ov;
ov=fHijing->Profile(xb);
- Float_t gb = 2.*0.01*fHijing->GetHIPR1(40)*kdib*xb*(1.-TMath::Exp(-fHijing->GetHINT1(12)*ov));
- Float_t gbh = 2.*0.01*fHijing->GetHIPR1(40)*kdib*xb*sigmaHard*ov;
+ Float_t gb = 2.*0.01*fHijing->GetHIPR1(40)*kdib*xb*(1.-TMath::Exp(-fHijing->GetHINT1(12)*ov));
+ Float_t gbh = 2.*0.01*fHijing->GetHIPR1(40)*kdib*xb*sigmaHard*ov;
xTot+=gb;
- xTotHard+=gbh;
+ xTotHard += gbh;
if (xb > fMinImpactParam && xb < fMaxImpactParam)
{
- xPart+=gb;
- xPartHard+=gbh;
+ xPart += gb;
+ xPartHard += gbh;
}
if(oldvalue) if ((xTot-oldvalue)/oldvalue<0.0001) break;
- oldvalue=xTot;
+ oldvalue = xTot;
printf("\n Total cross section (barn): %d %f %f \n",i, xb, xTot);
printf("\n Hard cross section (barn): %d %f %f \n\n",i, xb, xTotHard);
+ if (i>0) {
+ si1[i] = gb/kdib;
+ si2[i] = gbh/gb;
+ b[i] = xb;
+ }
}
+
printf("\n Total cross section (barn): %f \n",xTot);
printf("\n Hard cross section (barn): %f \n \n",xTotHard);
printf("\n Partial cross section (barn): %f %f \n",xPart, xPart/xTot*100.);
printf("\n Partial hard cross section (barn): %f %f \n",xPartHard, xPartHard/xTotHard*100.);
+
+// Store result as a graph
+ b[0] = 0;
+ si1[0] = 0;
+ si2[0]=si2[1];
+
+ fDsigmaDb = new TGraph(i, b, si1);
+ fDnDb = new TGraph(i, b, si2);
}
Bool_t AliGenHijing::DaughtersSelection(TParticle* iparticle, TClonesArray* particles)
// Looks recursively if one of the daughters has been selected
//
// printf("\n Consider daughters %d:",iparticle->GetPdgCode());
- Int_t imin=-1;
- Int_t imax=-1;
+ Int_t imin = -1;
+ Int_t imax = -1;
Int_t i;
- Bool_t hasDaughters= (iparticle->GetFirstDaughter() >=0);
- Bool_t selected=kFALSE;
+ Bool_t hasDaughters = (iparticle->GetFirstDaughter() >=0);
+ Bool_t selected = kFALSE;
if (hasDaughters) {
- imin=iparticle->GetFirstDaughter();
- imax=iparticle->GetLastDaughter();
- for (i=imin; i<= imax; i++){
- TParticle * jparticle = (TParticle *) particles->At(i);
- Int_t ip=jparticle->GetPdgCode();
- if (KinematicSelection(jparticle)&&SelectFlavor(ip)) {
+ imin = iparticle->GetFirstDaughter();
+ imax = iparticle->GetLastDaughter();
+ for (i = imin; i <= imax; i++){
+ TParticle * jparticle = (TParticle *) particles->At(i);
+ Int_t ip = jparticle->GetPdgCode();
+ if (KinematicSelection(jparticle,0)&&SelectFlavor(ip)) {
selected=kTRUE; break;
}
if (DaughtersSelection(jparticle, particles)) {selected=kTRUE; break; }
} else {
return kFALSE;
}
-
return selected;
}
// 0: all
// 4: charm and beauty
// 5: beauty
- if (fFlavor == 0) return kTRUE;
+ Bool_t res = 0;
- Int_t ifl=TMath::Abs(pid/100);
- if (ifl > 10) ifl/=10;
- return (fFlavor == ifl);
+ if (fFlavor == 0) {
+ res = kTRUE;
+ } else {
+ Int_t ifl = TMath::Abs(pid/100);
+ if (ifl > 10) ifl/=10;
+ res = (fFlavor == ifl);
+ }
+//
+// This part if gamma writing is inhibited
+ if (fNoGammas)
+ res = res && (pid != kGamma && pid != kPi0);
+//
+ return res;
}
Bool_t AliGenHijing::Stable(TParticle* particle)
{
- Int_t kf = TMath::Abs(particle->GetPdgCode());
+// Return true for a stable particle
+//
- if ( (particle->GetFirstDaughter() < 0 ) || (kf == 1000*fFlavor+122))
-
+ if (particle->GetFirstDaughter() < 0 )
{
return kTRUE;
} else {
}
}
+
+void AliGenHijing::Boost(TClonesArray* particles)
+{
+//
+// Boost cms into LHC lab frame
+//
+ Double_t dy = - 0.5 * TMath::Log(Double_t(fZProjectile) * Double_t(fATarget) /
+ (Double_t(fZTarget) * Double_t(fAProjectile)));
+ Double_t beta = TMath::TanH(dy);
+ Double_t gamma = 1./TMath::Sqrt(1.-beta*beta);
+ Double_t gb = gamma * beta;
+
+ printf("\n Boosting particles to lab frame %f %f %f", dy, beta, gamma);
+
+ Int_t i;
+ Int_t np = particles->GetEntriesFast();
+ for (i = 0; i < np; i++)
+ {
+ TParticle* iparticle = (TParticle*) particles->At(i);
+
+ Double_t e = iparticle->Energy();
+ Double_t px = iparticle->Px();
+ Double_t py = iparticle->Py();
+ Double_t pz = iparticle->Pz();
+
+ Double_t eb = gamma * e - gb * pz;
+ Double_t pzb = -gb * e + gamma * pz;
+
+ iparticle->SetMomentum(px, py, pzb, eb);
+ }
+}
+
+
void AliGenHijing::MakeHeader()
{
// Builds the event header, to be called after each event
- AliGenHijingEventHeader* header = new AliGenHijingEventHeader("Hijing");
-// header->SetDate(date);
-// header->SetRunNumber(run);
-// header->SetEventNumber(event);
- header->SetNProduced(fHijing->GetNATT());
- header->SetImpactParameter(fHijing->GetHINT1(19));
- header->SetTotalEnergy(fHijing->GetEATT());
- header->SetHardScatters(fHijing->GetJATT());
- header->SetParticipants(fHijing->GetNP(), fHijing->GetNT());
- header->SetCollisions(fHijing->GetN0(),
- fHijing->GetN01(),
- fHijing->GetN10(),
- fHijing->GetN11());
+ AliGenEventHeader* header = new AliGenHijingEventHeader("Hijing");
+ ((AliGenHijingEventHeader*) header)->SetNProduced(fHijing->GetNATT());
+ ((AliGenHijingEventHeader*) header)->SetImpactParameter(fHijing->GetHINT1(19));
+ ((AliGenHijingEventHeader*) header)->SetTotalEnergy(fHijing->GetEATT());
+ ((AliGenHijingEventHeader*) header)->SetHardScatters(fHijing->GetJATT());
+ ((AliGenHijingEventHeader*) header)->SetParticipants(fHijing->GetNP(), fHijing->GetNT());
+ ((AliGenHijingEventHeader*) header)->SetCollisions(fHijing->GetN0(),
+ fHijing->GetN01(),
+ fHijing->GetN10(),
+ fHijing->GetN11());
+ ((AliGenHijingEventHeader*) header)->SetSpectators(fSpecn, fSpecp);
+
+// 4-momentum vectors of the triggered jets.
+//
+// Before final state gluon radiation.
+ TLorentzVector* jet1 = new TLorentzVector(fHijing->GetHINT1(21),
+ fHijing->GetHINT1(22),
+ fHijing->GetHINT1(23),
+ fHijing->GetHINT1(24));
+
+ TLorentzVector* jet2 = new TLorentzVector(fHijing->GetHINT1(31),
+ fHijing->GetHINT1(32),
+ fHijing->GetHINT1(33),
+ fHijing->GetHINT1(34));
+// After final state gluon radiation.
+ TLorentzVector* jet3 = new TLorentzVector(fHijing->GetHINT1(26),
+ fHijing->GetHINT1(27),
+ fHijing->GetHINT1(28),
+ fHijing->GetHINT1(29));
+
+ TLorentzVector* jet4 = new TLorentzVector(fHijing->GetHINT1(36),
+ fHijing->GetHINT1(37),
+ fHijing->GetHINT1(38),
+ fHijing->GetHINT1(39));
+ ((AliGenHijingEventHeader*) header)->SetJets(jet1, jet2, jet3, jet4);
+// Bookkeeping for kinematic bias
+ ((AliGenHijingEventHeader*) header)->SetTrials(fTrials);
+// Event Vertex
+ header->SetPrimaryVertex(fEventVertex);
+ gAlice->SetGenEventHeader(header);
}
+Bool_t AliGenHijing::CheckTrigger()
+{
+// Check the kinematic trigger condition
+//
+ TLorentzVector* jet1 = new TLorentzVector(fHijing->GetHINT1(26),
+ fHijing->GetHINT1(27),
+ fHijing->GetHINT1(28),
+ fHijing->GetHINT1(29));
+
+ TLorentzVector* jet2 = new TLorentzVector(fHijing->GetHINT1(36),
+ fHijing->GetHINT1(37),
+ fHijing->GetHINT1(38),
+ fHijing->GetHINT1(39));
+ Double_t eta1 = jet1->Eta();
+ Double_t eta2 = jet2->Eta();
+ Double_t phi1 = jet1->Phi();
+ Double_t phi2 = jet2->Phi();
+ Bool_t triggered = kFALSE;
+// printf("\n Trigger: %f %f %f %f",
+// fEtaMinJet, fEtaMaxJet, fPhiMinJet, fPhiMaxJet);
+// printf("\n Jet1: %f %f", phi1, eta1);
+// printf("\n Jet2: %f %f", phi2, eta2);
+
+
+ if (
+ (eta1 < fEtaMaxJet && eta1 > fEtaMinJet &&
+ phi1 < fPhiMaxJet && phi1 > fPhiMinJet)
+ ||
+ (eta2 < fEtaMaxJet && eta2 > fEtaMinJet &&
+ phi2 < fPhiMaxJet && phi2 > fPhiMinJet)
+ )
+ triggered = kTRUE;
+
+ return triggered;
+}
+
+
+
+
AliGenHijing& AliGenHijing::operator=(const AliGenHijing& rhs)
{
// Assignment operator
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff