next50 trigger mask in AliHLTGlobalEsdConverterComponent
[u/mrichter/AliRoot.git] / THydjet / AliGenHydjet.cxx
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cb220f83 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
16/* $Id$ */
17
18// Generator using Hydjet as an external generator
19// The main Hydjet options are accessable for the user through this interface.
20// Uses the THydjet implementation of TGenerator.
21// Author:
22// Rafael Diaz Valdes (rafael.diaz.valdes@cern.ch)
23//
24#include <Riostream.h>
25#include <THydjet.h>
26#include <TParticle.h>
27#include <TClonesArray.h>
28
29#include "AliGenHydjet.h"
3f4e7ad8 30#include "AliLog.h"
cb220f83 31#include "AliGenHydjetEventHeader.h"
32#include "AliRun.h"
33#include "AliPythiaRndm.h"
34
35ClassImp(AliGenHydjet)
36
37AliGenHydjet::AliGenHydjet(Int_t npart) :
38 AliGenMC(npart),
39 //initial parameters
cb220f83 40 fFrame("CMS"), // Reference frame
41 fAtomicWeigth(207), // Projectile-Target atomic weight
42 fIfbtype(0), // centrality type
43 fFixImpactParam(0), // fixed impact parameter
44 fMinImpactParam(0.), // minimum impact parameter
45 fMaxImpactParam(1.), // maximum impact parameter
46 fSoftMult(20000), // mean soft multiplicity
47 //hydro parameters
48 fJetProd(2), // flag Jet production (nhsel)
49 fYflow(5.), // max longitudinal flow
50 fTflow(1.), // max transverse flow
51 fSoftFract(1.), // Soft multiplicity fraction
52 // PYTHIA parameters
53 fDijetProd(1), // flag dijet production
54 fMinPtHard(10.), // min pt hard
55 fStructFunction(7), // Structure Function (default CTEQ5M)
56 fMultipleInt(0), // flag multiple interaction
57
58 fHydjet(0),
59
60 fSelectAll(0),
61 fFlavor(0)
62
63{
64// Default PbPb collisions at 5. 5 TeV
65//
e7c989e4 66 fEnergyCMS = 5500.; //Energy cms
cb220f83 67 fName = "Hydjet";
68 fTitle = "Particle Generator using Hydjet";
9731de01 69 // Set random number generator
70 if (!AliPythiaRndm::GetPythiaRandom())
71 AliPythiaRndm::SetPythiaRandom(GetRandom());
cb220f83 72}
73
74AliGenHydjet::~AliGenHydjet()
75{
76// Destructor
cb220f83 77}
78
79void AliGenHydjet::Init()
80{
81// Initialisation
82
83 SetMC(new THydjet(fEnergyCMS, fFrame,fAtomicWeigth,
84 fIfbtype,fMinImpactParam, fMaxImpactParam,
85 fFixImpactParam,fSoftMult));
86
87 fHydjet=(THydjet*) fMCEvGen;
88
89 // init hydro common blocks
90 fHydjet->SetNHSEL(fJetProd);
91 fHydjet->SetYLFL(fYflow);
92 fHydjet->SetYTFL(fTflow);
93 fHydjet->SetFPART(fSoftFract);
94 // init PYTHIA common block
95 fHydjet->SetMSEL(fDijetProd);
96 fHydjet->SetPTMIN(fMinPtHard);
97 fHydjet->SetCKIN(3,fMinPtHard);
98 fHydjet->SetMSTP(51,fStructFunction);
99 fHydjet->SetMSTP(81,0);
100 fHydjet->SetMSTU(21,1);
101 fHydjet->SetPARU(14,1.);
102
103// Initialize Hydjet
104 fHydjet->Initialize();
105
106}
107
108void AliGenHydjet::Generate()
109{
110
111///////////////////////////////////////////////////////////////////////////////////////////
112 Float_t polar[3] = {0,0,0};
113 Float_t origin[3] = {0,0,0};
114 Float_t origin0[3] = {0,0,0};
21391258 115 Float_t time0 = 0.;
cb220f83 116 Float_t p[3];
117 Float_t tof;
118
119// converts from mm/c to s
120 const Float_t kconv = 0.001/2.999792458e8;
121//
122 Int_t nt = 0;
123 Int_t j, kf, ks, imo;
124 kf = 0;
125
126 for (j = 0;j < 3; j++) origin0[j] = fOrigin[j];
21391258 127 time0 = fTimeOrigin;
cb220f83 128 if(fVertexSmear == kPerEvent) {
129 Vertex();
130 for (j=0; j < 3; j++) origin0[j] = fVertex[j];
21391258 131 time0 = fTime;
cb220f83 132 }
133
134 while(1)
135 {
136// Generate one event
137 fHydjet->GenerateEvent();
9731de01 138 fHydjet->ImportParticles(&fParticles,"All");
cb220f83 139
9731de01 140 Int_t np = fParticles.GetEntriesFast();
cb220f83 141 Int_t nc = 0;
142 if (np == 0 ) continue;
143 Int_t i;
144 Int_t* pSelected = new Int_t[np];
145
146 for (i = 0; i < np; i++) {
147 pSelected[i] = 0;
148 }
149
150// Get event vertex
151 fVertex[0] = origin0[0];
152 fVertex[1] = origin0[1];
153 fVertex[2] = origin0[2];
21391258 154 fTime = time0;
cb220f83 155
156//
157// Now select the final state particles
158//
159
160 for(i = 0; i<np; i++){
9731de01 161 TParticle * iparticle = (TParticle *) fParticles.At(i);
cb220f83 162 // Is this a final state particle ?
163 if (!Stable(iparticle)) continue;
164 Bool_t selected = kTRUE;
165 kf = iparticle->GetPdgCode();
166 ks = iparticle->GetStatusCode();
167 if(!fSelectAll) selected = KinematicSelection(iparticle,0)&&SelectFlavor(kf);
168 // Put particle on the stack if selected
169 if(selected) {
170 nc++;
171 pSelected[i] = 1;
172 } // selected
173 } // particle loop final state
174
175
176//
177// Write particles to stack
178//
179
180 for(i = 0; i<np; i++) {
9731de01 181 TParticle * iparticle = (TParticle *) fParticles.At(i);
cb220f83 182 Bool_t hasDaughter = (iparticle->GetFirstDaughter() > 0);
183 if(pSelected[i]){
184 kf = iparticle->GetPdgCode();
185 ks = iparticle->GetStatusCode();
186 p[0] = iparticle->Px();
187 p[1] = iparticle->Py();
188 p[2] = iparticle->Pz();
189 origin[0] = fVertex[0]+iparticle->Vx()/10;
190 origin[1] = fVertex[1]+iparticle->Vy()/10;
191 origin[2] = fVertex[2]+iparticle->Vz()/10;
21391258 192 tof = fTime + kconv*iparticle->T();
cb220f83 193
194 imo = -1;
195 //imo = iparticle->GetFirstMother();
196 //if(imo == 0) imo =-1;
197 Bool_t tFlag = (fTrackIt && !hasDaughter);
198 PushTrack(tFlag,imo,kf,p,origin,polar,tof,kPNoProcess,nt, 1., ks);
199 KeepTrack(nt);
200 } // if selected
201 } // particle loop
202 delete[] pSelected;
203
3f4e7ad8 204 AliInfo(Form("\n I've put %i particles on the stack \n",nc));
cb220f83 205 if (nc > 0) break;
206 } // event loop
207 MakeHeader();
208}
209
210
211Bool_t AliGenHydjet::SelectFlavor(Int_t pid)
212{
213// Select flavor of particle
214// 0: all
215// 4: charm and beauty
216// 5: beauty
217 Bool_t res = 0;
218 if (fFlavor == 0) {
219 res = kTRUE;
220 } else {
221 Int_t ifl = TMath::Abs(pid/100);
222 if (ifl > 10) ifl/=10;
223 res = (fFlavor == ifl);
224 }
225 return res;
226}
227
228Bool_t AliGenHydjet::Stable(TParticle* particle) const
229{
230// Return true for a stable particle
231 if (particle->GetFirstDaughter() == 0 )
232 {
233 return kTRUE;
234 } else {
235 return kFALSE;
236 }
237}
238
239
240///////////////////////////////////
241void AliGenHydjet::MakeHeader()
242{
243// Builds the event header, to be called after each event
244 AliGenEventHeader* header = new AliGenHydjetEventHeader("Hydjet");
245 ((AliGenHydjetEventHeader*) header)->SetNProduced(fHydjet->GetN());
246 ((AliGenHydjetEventHeader*) header)->SetImpactParameter(fHydjet->GetBGEN());
247 ((AliGenHydjetEventHeader*) header)->SetNbcol(fHydjet->GetNBCOL());
248 ((AliGenHydjetEventHeader*) header)->SetNpart(fHydjet->GetNPART());
249 ((AliGenHydjetEventHeader*) header)->SetNpyt(fHydjet->GetNPYT());
250 ((AliGenHydjetEventHeader*) header)->SetNhyd(fHydjet->GetNHYD());
251 // draw generation values
252 cout << "*********Hyflow ********** " << endl;
253 cout << " YTFL " << fHydjet->GetYTFL() << endl;
254 cout << " YLFL " << fHydjet->GetYLFL() << endl;
255 cout << " FPART " << fHydjet->GetFPART() << endl;
256 cout << "*********Hyjpar ********* " << endl;
257 cout << " GetNHSEL() " << fHydjet->GetNHSEL() << endl;
258 cout << " GetPTMIN() " << fHydjet->GetPTMIN() << endl;
259 cout << " GetNJET() " << fHydjet->GetNJET() << endl;
260 cout << "*********Hyfpar ********* " << endl;
261 cout << " GetBGEN() " << fHydjet->GetBGEN() << endl;
262 cout << " GetNBCOL() " << fHydjet->GetNBCOL() << endl;
263 cout << " GetNPART() " << fHydjet->GetNPART() << endl;
264 cout << " GetNPYT() " << fHydjet->GetNPYT() << endl;
265 cout << " GetNHYD() " << fHydjet->GetNHYD() << endl;
266
267
268// Event Vertex
269 header->SetPrimaryVertex(fVertex);
21391258 270 header->SetInteractionTime(fTime);
cb220f83 271 AddHeader(header);
272 fCollisionGeometry = (AliGenHydjetEventHeader*) header;
273}
274
275void AliGenHydjet::AddHeader(AliGenEventHeader* header)
276{
277 // Passes header either to the container or to gAlice
278 if (fContainer) {
279 fContainer->AddHeader(header);
280 } else {
281 gAlice->SetGenEventHeader(header);
282 }
283}
284
285
286void AliGenHydjet::Copy(TObject &) const
287{
288 Fatal("Copy","Not implemented!\n");
289}
290
291AliGenHydjet& AliGenHydjet::operator=(const AliGenHydjet& rhs)
292{
293 rhs.Copy(*this);
294 return (*this);
295}
296