doxy: MUON macros, refs, src links, no coll graph
[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
dc3e3e91 35using std::cout;
36using std::endl;
37
cb220f83 38ClassImp(AliGenHydjet)
39
40AliGenHydjet::AliGenHydjet(Int_t npart) :
41 AliGenMC(npart),
42 //initial parameters
cb220f83 43 fFrame("CMS"), // Reference frame
44 fAtomicWeigth(207), // Projectile-Target atomic weight
45 fIfbtype(0), // centrality type
46 fFixImpactParam(0), // fixed impact parameter
47 fMinImpactParam(0.), // minimum impact parameter
48 fMaxImpactParam(1.), // maximum impact parameter
49 fSoftMult(20000), // mean soft multiplicity
50 //hydro parameters
51 fJetProd(2), // flag Jet production (nhsel)
52 fYflow(5.), // max longitudinal flow
53 fTflow(1.), // max transverse flow
54 fSoftFract(1.), // Soft multiplicity fraction
55 // PYTHIA parameters
56 fDijetProd(1), // flag dijet production
57 fMinPtHard(10.), // min pt hard
58 fStructFunction(7), // Structure Function (default CTEQ5M)
59 fMultipleInt(0), // flag multiple interaction
60
61 fHydjet(0),
62
63 fSelectAll(0),
64 fFlavor(0)
65
66{
67// Default PbPb collisions at 5. 5 TeV
68//
e7c989e4 69 fEnergyCMS = 5500.; //Energy cms
cb220f83 70 fName = "Hydjet";
71 fTitle = "Particle Generator using Hydjet";
9731de01 72 // Set random number generator
73 if (!AliPythiaRndm::GetPythiaRandom())
74 AliPythiaRndm::SetPythiaRandom(GetRandom());
cb220f83 75}
76
77AliGenHydjet::~AliGenHydjet()
78{
79// Destructor
cb220f83 80}
81
82void AliGenHydjet::Init()
83{
84// Initialisation
85
86 SetMC(new THydjet(fEnergyCMS, fFrame,fAtomicWeigth,
87 fIfbtype,fMinImpactParam, fMaxImpactParam,
88 fFixImpactParam,fSoftMult));
89
90 fHydjet=(THydjet*) fMCEvGen;
91
92 // init hydro common blocks
93 fHydjet->SetNHSEL(fJetProd);
94 fHydjet->SetYLFL(fYflow);
95 fHydjet->SetYTFL(fTflow);
96 fHydjet->SetFPART(fSoftFract);
97 // init PYTHIA common block
98 fHydjet->SetMSEL(fDijetProd);
99 fHydjet->SetPTMIN(fMinPtHard);
100 fHydjet->SetCKIN(3,fMinPtHard);
101 fHydjet->SetMSTP(51,fStructFunction);
102 fHydjet->SetMSTP(81,0);
103 fHydjet->SetMSTU(21,1);
104 fHydjet->SetPARU(14,1.);
105
106// Initialize Hydjet
107 fHydjet->Initialize();
108
109}
110
111void AliGenHydjet::Generate()
112{
113
114///////////////////////////////////////////////////////////////////////////////////////////
115 Float_t polar[3] = {0,0,0};
116 Float_t origin[3] = {0,0,0};
117 Float_t origin0[3] = {0,0,0};
21391258 118 Float_t time0 = 0.;
cb220f83 119 Float_t p[3];
120 Float_t tof;
121
122// converts from mm/c to s
123 const Float_t kconv = 0.001/2.999792458e8;
124//
125 Int_t nt = 0;
126 Int_t j, kf, ks, imo;
127 kf = 0;
128
129 for (j = 0;j < 3; j++) origin0[j] = fOrigin[j];
21391258 130 time0 = fTimeOrigin;
cb220f83 131 if(fVertexSmear == kPerEvent) {
132 Vertex();
133 for (j=0; j < 3; j++) origin0[j] = fVertex[j];
21391258 134 time0 = fTime;
cb220f83 135 }
136
137 while(1)
138 {
139// Generate one event
140 fHydjet->GenerateEvent();
9731de01 141 fHydjet->ImportParticles(&fParticles,"All");
cb220f83 142
9731de01 143 Int_t np = fParticles.GetEntriesFast();
cb220f83 144 Int_t nc = 0;
145 if (np == 0 ) continue;
146 Int_t i;
147 Int_t* pSelected = new Int_t[np];
148
149 for (i = 0; i < np; i++) {
150 pSelected[i] = 0;
151 }
152
153// Get event vertex
154 fVertex[0] = origin0[0];
155 fVertex[1] = origin0[1];
156 fVertex[2] = origin0[2];
21391258 157 fTime = time0;
cb220f83 158
159//
160// Now select the final state particles
161//
162
163 for(i = 0; i<np; i++){
9731de01 164 TParticle * iparticle = (TParticle *) fParticles.At(i);
cb220f83 165 // Is this a final state particle ?
166 if (!Stable(iparticle)) continue;
167 Bool_t selected = kTRUE;
168 kf = iparticle->GetPdgCode();
169 ks = iparticle->GetStatusCode();
170 if(!fSelectAll) selected = KinematicSelection(iparticle,0)&&SelectFlavor(kf);
171 // Put particle on the stack if selected
172 if(selected) {
173 nc++;
174 pSelected[i] = 1;
175 } // selected
176 } // particle loop final state
177
178
179//
180// Write particles to stack
181//
182
183 for(i = 0; i<np; i++) {
9731de01 184 TParticle * iparticle = (TParticle *) fParticles.At(i);
cb220f83 185 Bool_t hasDaughter = (iparticle->GetFirstDaughter() > 0);
186 if(pSelected[i]){
187 kf = iparticle->GetPdgCode();
188 ks = iparticle->GetStatusCode();
189 p[0] = iparticle->Px();
190 p[1] = iparticle->Py();
191 p[2] = iparticle->Pz();
192 origin[0] = fVertex[0]+iparticle->Vx()/10;
193 origin[1] = fVertex[1]+iparticle->Vy()/10;
194 origin[2] = fVertex[2]+iparticle->Vz()/10;
21391258 195 tof = fTime + kconv*iparticle->T();
cb220f83 196
197 imo = -1;
198 //imo = iparticle->GetFirstMother();
199 //if(imo == 0) imo =-1;
200 Bool_t tFlag = (fTrackIt && !hasDaughter);
201 PushTrack(tFlag,imo,kf,p,origin,polar,tof,kPNoProcess,nt, 1., ks);
202 KeepTrack(nt);
203 } // if selected
204 } // particle loop
205 delete[] pSelected;
206
3f4e7ad8 207 AliInfo(Form("\n I've put %i particles on the stack \n",nc));
cb220f83 208 if (nc > 0) break;
209 } // event loop
210 MakeHeader();
211}
212
213
214Bool_t AliGenHydjet::SelectFlavor(Int_t pid)
215{
216// Select flavor of particle
217// 0: all
218// 4: charm and beauty
219// 5: beauty
220 Bool_t res = 0;
221 if (fFlavor == 0) {
222 res = kTRUE;
223 } else {
224 Int_t ifl = TMath::Abs(pid/100);
225 if (ifl > 10) ifl/=10;
226 res = (fFlavor == ifl);
227 }
228 return res;
229}
230
231Bool_t AliGenHydjet::Stable(TParticle* particle) const
232{
233// Return true for a stable particle
234 if (particle->GetFirstDaughter() == 0 )
235 {
236 return kTRUE;
237 } else {
238 return kFALSE;
239 }
240}
241
242
243///////////////////////////////////
244void AliGenHydjet::MakeHeader()
245{
246// Builds the event header, to be called after each event
247 AliGenEventHeader* header = new AliGenHydjetEventHeader("Hydjet");
248 ((AliGenHydjetEventHeader*) header)->SetNProduced(fHydjet->GetN());
249 ((AliGenHydjetEventHeader*) header)->SetImpactParameter(fHydjet->GetBGEN());
250 ((AliGenHydjetEventHeader*) header)->SetNbcol(fHydjet->GetNBCOL());
251 ((AliGenHydjetEventHeader*) header)->SetNpart(fHydjet->GetNPART());
252 ((AliGenHydjetEventHeader*) header)->SetNpyt(fHydjet->GetNPYT());
253 ((AliGenHydjetEventHeader*) header)->SetNhyd(fHydjet->GetNHYD());
254 // draw generation values
255 cout << "*********Hyflow ********** " << endl;
256 cout << " YTFL " << fHydjet->GetYTFL() << endl;
257 cout << " YLFL " << fHydjet->GetYLFL() << endl;
258 cout << " FPART " << fHydjet->GetFPART() << endl;
259 cout << "*********Hyjpar ********* " << endl;
260 cout << " GetNHSEL() " << fHydjet->GetNHSEL() << endl;
261 cout << " GetPTMIN() " << fHydjet->GetPTMIN() << endl;
262 cout << " GetNJET() " << fHydjet->GetNJET() << endl;
263 cout << "*********Hyfpar ********* " << endl;
264 cout << " GetBGEN() " << fHydjet->GetBGEN() << endl;
265 cout << " GetNBCOL() " << fHydjet->GetNBCOL() << endl;
266 cout << " GetNPART() " << fHydjet->GetNPART() << endl;
267 cout << " GetNPYT() " << fHydjet->GetNPYT() << endl;
268 cout << " GetNHYD() " << fHydjet->GetNHYD() << endl;
269
270
271// Event Vertex
272 header->SetPrimaryVertex(fVertex);
21391258 273 header->SetInteractionTime(fTime);
cb220f83 274 AddHeader(header);
275 fCollisionGeometry = (AliGenHydjetEventHeader*) header;
276}
277
278void AliGenHydjet::AddHeader(AliGenEventHeader* header)
279{
280 // Passes header either to the container or to gAlice
281 if (fContainer) {
282 fContainer->AddHeader(header);
283 } else {
284 gAlice->SetGenEventHeader(header);
285 }
286}
287
288
289void AliGenHydjet::Copy(TObject &) const
290{
291 Fatal("Copy","Not implemented!\n");
292}
293
294AliGenHydjet& AliGenHydjet::operator=(const AliGenHydjet& rhs)
295{
296 rhs.Copy(*this);
297 return (*this);
298}
299