]>
Commit | Line | Data |
---|---|---|
2c890605 | 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 | // Class to generate correlated Heavy Flavor hadron pairs (one or several pairs | |
19 | // per event) using paramtrized kinematics of quark pairs from some generator | |
20 | // and quark fragmentation functions. | |
21 | // Is a generalisation of AliGenParam class for correlated pairs of hadrons. | |
22 | // In this version quark pairs and fragmentation functions are obtained from | |
b33adf51 | 23 | // ~2.10^6 Pythia6.214 events generated with kCharmppMNRwmi & kBeautyppMNRwmi, |
9fd56238 | 24 | // CTEQ5L PDF and Pt_hard = 2.76 GeV/c for p-p collisions at 7, 10 and 14 TeV, |
25 | // and with kCharmppMNR (Pt_hard = 2.10 GeV/c) & kBeautyppMNR (Pt_hard = 2.75 GeV/c), | |
26 | // CTEQ4L PDF for Pb-Pb at 3.94 TeV, for p-Pb & Pb-p at 8.8 TeV. | |
b33adf51 | 27 | // Decays are performed by Pythia. |
2c890605 | 28 | // Author: S. Grigoryan, LPC Clermont-Fd & YerPhI, Smbat.Grigoryan@cern.ch |
b44c3901 | 29 | // July 07: added quarks in the stack (B. Vulpescu) |
b33adf51 | 30 | // April 09: added energy choice between 10 and 14 TeV (S. Grigoryan) |
9fd56238 | 31 | // Sept 09: added hadron pair composition probabilities via 2D histo (X.M. Zhang) |
32 | // Oct 09: added energy choice between 7, 10, 14 TeV (for p-p), 4 TeV (for Pb-Pb), | |
33 | // 9 TeV (for p-Pb) and -9 TeV (for Pb-p) (S. Grigoryan) | |
5cc3bcd2 | 34 | // April 10: removed "static" from definition of some variables (B. Vulpescu) |
7455632e | 35 | // May 11: added Flag for transportation of background particles while using |
36 | // SetForceDecay() function (L. Manceau) | |
37 | // June 11: added modifications allowing the setting of cuts on HF-hadron children. | |
38 | // Quarks, hadrons and decay particles are loaded in the stack outside the loop | |
39 | // of HF-hadrons, when the cuts on their children are satisfied (L. Manceau) | |
40 | // Oct 11: added Pb-Pb at 2.76 TeV (S. Grigoryan) | |
4bac9bd3 | 41 | // June 12: added p-Pb & Pb-p at 5 TeV (S. Grigoryan) |
826fd892 | 42 | // |
2c890605 | 43 | //------------------------------------------------------------------------- |
b33adf51 | 44 | // How it works (for the given flavor and p-p energy): |
2c890605 | 45 | // |
5cc3bcd2 | 46 | // 1) Reads QQbar kinematical grid (TTree) from the Input file and generates |
2c890605 | 47 | // quark pairs according to the weights of the cells. |
48 | // It is a 5D grid in y1,y2,pt1,pt2 and deltaphi, with occupancy weights | |
49 | // of the cells obtained from Pythia (see details in GetQuarkPair). | |
50 | // 2) Reads "soft" and "hard" fragmentation functions (12 2D-histograms each, | |
51 | // for 12 pt bins) from the Input file, applies to quarks and produces hadrons | |
52 | // (only lower states, with proportions of species obtained from Pythia). | |
53 | // Fragmentation functions are the same for all hadron species and depend | |
54 | // on 2 variables - light cone energy-momentum fractions: | |
55 | // z1=(E_H + Pz_H)/(E_Q + Pz_Q), z2=(E_H - Pz_H)/(E_Q - Pz_Q). | |
56 | // "soft" & "hard" FFs correspond to "slower" & "faster" quark of a pair | |
b33adf51 | 57 | // (see details in GetHadronPair). Fragmentation does not depend on p-p energy. |
2c890605 | 58 | // 3) Decays the hadrons and saves all the particles in the event stack in the |
59 | // following order: HF hadron from Q, then its decay products, then HF hadron | |
60 | // from Qbar, then its decay productes, then next HF hadon pair (if any) | |
61 | // in the same way, etc... | |
62 | // 4) It is fast, e.g., generates the same number of events with a beauty pair | |
63 | // ~15 times faster than AliGenPythia with kBeautyppMNRwmi (w/o tracking) | |
64 | // | |
b33adf51 | 65 | // An Input file for each quark flavor and p-p energy is in EVGEN/dataCorrHF/ |
2c890605 | 66 | // One can use also user-defined Input files. |
67 | // | |
68 | // More details could be found in my presentation at DiMuonNet Workshop, Dec 2006: | |
b33adf51 | 69 | // http://www-dapnia.cea.fr/Sphn/Alice/DiMuonNet. |
2c890605 | 70 | // |
71 | //------------------------------------------------------------------------- | |
72 | // How to use it: | |
73 | // | |
74 | // add the following typical lines in Config.C | |
75 | /* | |
76 | if (!strcmp(option,"corr")) { | |
9fd56238 | 77 | // An example for correlated charm or beauty hadron pair production at 14 TeV |
2c890605 | 78 | |
b33adf51 | 79 | // AliGenCorrHF *gener = new AliGenCorrHF(1, 4, 14); // for charm, 1 pair per event |
80 | AliGenCorrHF *gener = new AliGenCorrHF(1, 5, 14); // for beauty, 1 pair per event | |
2c890605 | 81 | |
82 | gener->SetMomentumRange(0,9999); | |
9fd56238 | 83 | gener->SetCutOnChild(0); // 1/0 means cuts on children enable/disable |
2c890605 | 84 | gener->SetChildThetaRange(171.0,178.0); |
85 | gener->SetOrigin(0,0,0); //vertex position | |
86 | gener->SetSigma(0,0,0); //Sigma in (X,Y,Z) (cm) on IP position | |
87 | gener->SetForceDecay(kSemiMuonic); | |
88 | gener->SetTrackingFlag(0); | |
89 | gener->Init(); | |
90 | } | |
91 | */ | |
92 | // and in aliroot do e.g. gAlice->Run(10,"Config.C") to produce 10 events. | |
93 | // One can include AliGenCorrHF in an AliGenCocktail generator. | |
94 | //-------------------------------------------------------------------------- | |
95 | ||
7ca4655f | 96 | #include <Riostream.h> |
97 | #include <TCanvas.h> | |
98 | #include <TClonesArray.h> | |
99 | #include <TDatabasePDG.h> | |
2c890605 | 100 | #include <TFile.h> |
2c890605 | 101 | #include <TH2F.h> |
2c890605 | 102 | #include <TLorentzVector.h> |
7ca4655f | 103 | #include <TMath.h> |
2c890605 | 104 | #include <TParticle.h> |
105 | #include <TParticlePDG.h> | |
7ca4655f | 106 | #include <TROOT.h> |
107 | #include <TRandom.h> | |
108 | #include <TTree.h> | |
2c890605 | 109 | #include <TVirtualMC.h> |
b44c3901 | 110 | #include <TVector3.h> |
2c890605 | 111 | |
112 | #include "AliGenCorrHF.h" | |
113 | #include "AliLog.h" | |
114 | #include "AliConst.h" | |
115 | #include "AliDecayer.h" | |
116 | #include "AliMC.h" | |
117 | #include "AliRun.h" | |
84555c93 | 118 | #include "AliGenEventHeader.h" |
2c890605 | 119 | |
120 | ClassImp(AliGenCorrHF) | |
121 | ||
122 | //Begin_Html | |
123 | /* | |
124 | <img src="picts/AliGenCorrHF.gif"> | |
125 | */ | |
126 | //End_Html | |
127 | ||
128 | Double_t AliGenCorrHF::fgdph[19] = {0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180}; | |
129 | Double_t AliGenCorrHF::fgy[31] = {-10,-7, -6.5, -6, -5.5, -5, -4.5, -4, -3.5, -3, -2.5, -2,- 1.5, -1, -0.5, 0, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 10}; | |
b33adf51 | 130 | Double_t AliGenCorrHF::fgpt[51] = {0, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.6, 7.2, 7.8, 8.4, 9, 9.6, 10.3, 11.1, 12, 13, 14, 15, 16, 17, 18, 19, 20.1, 21.5, 23, 24.5, 26, 27.5, 29.1, 31, 33, 35, 37, 39.2, 42, 45, 48, 51, 55.2, 60, 65, 71, 81, 100}; |
2c890605 | 131 | Int_t AliGenCorrHF::fgnptbins = 12; |
132 | Double_t AliGenCorrHF::fgptbmin[12] = {0, 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 7, 9}; | |
133 | Double_t AliGenCorrHF::fgptbmax[12] = {0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 7, 9, 100}; | |
134 | ||
2c890605 | 135 | //____________________________________________________________ |
136 | AliGenCorrHF::AliGenCorrHF(): | |
137 | fFileName(0), | |
138 | fFile(0), | |
139 | fQuark(0), | |
b33adf51 | 140 | fEnergy(0), |
2c890605 | 141 | fBias(0.), |
142 | fTrials(0), | |
18e09c20 | 143 | fSelectAll(kFALSE), |
5cc3bcd2 | 144 | fDecayer(0), |
145 | fgIntegral(0) | |
2c890605 | 146 | { |
147 | // Default constructor | |
148 | } | |
149 | ||
150 | //____________________________________________________________ | |
b33adf51 | 151 | AliGenCorrHF::AliGenCorrHF(Int_t npart, Int_t idquark, Int_t energy): |
2c890605 | 152 | AliGenMC(npart), |
153 | fFileName(0), | |
154 | fFile(0), | |
b33adf51 | 155 | fQuark(idquark), |
156 | fEnergy(energy), | |
2c890605 | 157 | fBias(0.), |
158 | fTrials(0), | |
18e09c20 | 159 | fSelectAll(kFALSE), |
5cc3bcd2 | 160 | fDecayer(0), |
161 | fgIntegral(0) | |
2c890605 | 162 | { |
b33adf51 | 163 | // Constructor using particle number, quark type, energy & default InputFile |
2c890605 | 164 | // |
b33adf51 | 165 | if (fQuark == 5) { |
9fd56238 | 166 | if (fEnergy == 7) |
167 | fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/BeautyPP7PythiaMNRwmi.root"; | |
168 | else if (fEnergy == 10) | |
169 | fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/BeautyPP10PythiaMNRwmi.root"; | |
170 | else if (fEnergy == 14) | |
171 | fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/BeautyPP14PythiaMNRwmi.root"; | |
7455632e | 172 | else if (fEnergy == 3) |
173 | fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/BeautyPbPb276PythiaMNR.root"; | |
9fd56238 | 174 | else if (fEnergy == 4) |
175 | fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/BeautyPbPb394PythiaMNR.root"; | |
4bac9bd3 | 176 | else if (fEnergy == 5 || fEnergy == -5) |
177 | fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/BeautyPPb5PythiaMNR.root"; | |
9fd56238 | 178 | else if (fEnergy == 9 || fEnergy == -9) |
179 | fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/BeautyPPb88PythiaMNR.root"; | |
180 | else fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/BeautyPbPb394PythiaMNR.root"; | |
b33adf51 | 181 | } |
182 | else { | |
183 | fQuark = 4; | |
9fd56238 | 184 | if (fEnergy == 7) |
185 | fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/CharmPP7PythiaMNRwmi.root"; | |
186 | else if (fEnergy == 10) | |
187 | fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/CharmPP10PythiaMNRwmi.root"; | |
188 | else if (fEnergy == 14) | |
189 | fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/CharmPP14PythiaMNRwmi.root"; | |
7455632e | 190 | else if (fEnergy == 3) |
191 | fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/CharmPbPb276PythiaMNR.root"; | |
9fd56238 | 192 | else if (fEnergy == 4) |
193 | fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/CharmPbPb394PythiaMNR.root"; | |
4bac9bd3 | 194 | else if (fEnergy == 5 || fEnergy == -5) |
195 | fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/CharmPPb5PythiaMNR.root"; | |
9fd56238 | 196 | else if (fEnergy == 9 || fEnergy == -9) |
197 | fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/CharmPPb88PythiaMNR.root"; | |
198 | else fFileName = "$ALICE_ROOT/EVGEN/dataCorrHF/CharmPbPb394PythiaMNR.root"; | |
b33adf51 | 199 | } |
2c890605 | 200 | fName = "Default"; |
201 | fTitle= "Generator for correlated pairs of HF hadrons"; | |
202 | ||
203 | fChildSelect.Set(5); | |
204 | for (Int_t i=0; i<5; i++) fChildSelect[i]=0; | |
205 | SetForceDecay(); | |
206 | SetCutOnChild(); | |
207 | SetChildMomentumRange(); | |
208 | SetChildPtRange(); | |
209 | SetChildPhiRange(); | |
210 | SetChildThetaRange(); | |
211 | } | |
212 | ||
213 | //___________________________________________________________________ | |
b33adf51 | 214 | AliGenCorrHF::AliGenCorrHF(char* tname, Int_t npart, Int_t idquark, Int_t energy): |
2c890605 | 215 | AliGenMC(npart), |
216 | fFileName(tname), | |
217 | fFile(0), | |
b33adf51 | 218 | fQuark(idquark), |
219 | fEnergy(energy), | |
2c890605 | 220 | fBias(0.), |
221 | fTrials(0), | |
18e09c20 | 222 | fSelectAll(kFALSE), |
5cc3bcd2 | 223 | fDecayer(0), |
224 | fgIntegral(0) | |
2c890605 | 225 | { |
b33adf51 | 226 | // Constructor using particle number, quark type, energy & user-defined InputFile |
2c890605 | 227 | // |
228 | if (fQuark != 5) fQuark = 4; | |
229 | fName = "UserDefined"; | |
230 | fTitle= "Generator for correlated pairs of HF hadrons"; | |
231 | ||
232 | fChildSelect.Set(5); | |
233 | for (Int_t i=0; i<5; i++) fChildSelect[i]=0; | |
234 | SetForceDecay(); | |
235 | SetCutOnChild(); | |
236 | SetChildMomentumRange(); | |
237 | SetChildPtRange(); | |
238 | SetChildPhiRange(); | |
239 | SetChildThetaRange(); | |
240 | } | |
241 | ||
2c890605 | 242 | //____________________________________________________________ |
243 | AliGenCorrHF::~AliGenCorrHF() | |
244 | { | |
245 | // Destructor | |
246 | delete fFile; | |
247 | } | |
248 | ||
249 | //____________________________________________________________ | |
250 | void AliGenCorrHF::Init() | |
251 | { | |
252 | // Initialisation | |
826fd892 | 253 | AliInfo(Form("Number of HF-hadron pairs = %d",fNpart)); |
2c890605 | 254 | AliInfo(Form(" QQbar kinematics and fragm. functions from: %s",fFileName.Data() )); |
255 | fFile = TFile::Open(fFileName.Data()); | |
256 | if(!fFile->IsOpen()){ | |
257 | AliError(Form("Could not open file %s",fFileName.Data() )); | |
258 | } | |
259 | ||
260 | ComputeIntegral(fFile); | |
b44c3901 | 261 | |
2c890605 | 262 | fParentWeight = 1./fNpart; // fNpart is number of HF-hadron pairs |
263 | ||
264 | // particle decay related initialization | |
265 | ||
266 | if (gMC) fDecayer = gMC->GetDecayer(); | |
267 | fDecayer->SetForceDecay(fForceDecay); | |
268 | fDecayer->Init(); | |
269 | ||
270 | // | |
271 | AliGenMC::Init(); | |
272 | } | |
2c890605 | 273 | //____________________________________________________________ |
274 | void AliGenCorrHF::Generate() | |
275 | { | |
276 | // | |
cb11fd27 | 277 | // Generate fNpart of correlated HF hadron pairs per event |
278 | // in the the desired theta and momentum windows (phi = 0 - 2pi). | |
84555c93 | 279 | // |
cb11fd27 | 280 | |
84555c93 | 281 | // Reinitialize decayer |
2c890605 | 282 | |
84555c93 | 283 | fDecayer->SetForceDecay(fForceDecay); |
284 | fDecayer->Init(); | |
826fd892 | 285 | |
286 | Float_t polar[2][3]; // Polarisation of the parent particle (for GEANT tracking) | |
287 | Float_t origin0[2][3]; // Origin of the generated parent particle (for GEANT tracking) | |
2c890605 | 288 | Float_t pt, pl, ptot; // Transverse, logitudinal and total momenta of the parent particle |
289 | Float_t phi, theta; // Phi and theta spherical angles of the parent particle momentum | |
826fd892 | 290 | Float_t p[2][3]; // Momenta |
291 | Int_t nt, i, j, ihad, ipa, ipa0, ipa1, ihadron[2], iquark[2]; | |
292 | Float_t wgtp[2], wgtch[2], random[6]; | |
293 | Float_t pq[2][3], pc[3]; // Momenta of the two quarks | |
cb11fd27 | 294 | Double_t tanhy2, qm = 0; |
826fd892 | 295 | Int_t np[2]; |
b44c3901 | 296 | Double_t dphi=0, ptq[2], yq[2], pth[2], plh[2], ph[2], phih[2], phiq[2]; |
826fd892 | 297 | Int_t ncsel[2]; |
298 | Int_t** pSelected = new Int_t* [2]; | |
299 | Int_t** trackIt = new Int_t* [2]; | |
300 | ||
2c890605 | 301 | for (i=0; i<2; i++) { |
b44c3901 | 302 | ptq[i] =0; |
303 | yq[i] =0; | |
304 | pth[i] =0; | |
305 | plh[i] =0; | |
306 | phih[i] =0; | |
307 | phiq[i] =0; | |
2c890605 | 308 | ihadron[i] =0; |
84555c93 | 309 | iquark[i] =0; |
826fd892 | 310 | for (j=0; j<3; j++) polar[i][j]=0; |
2c890605 | 311 | } |
312 | ||
cb11fd27 | 313 | // same quarks mass as in the fragmentation functions |
314 | if (fQuark == 4) qm = 1.20; | |
315 | else qm = 4.75; | |
2c890605 | 316 | |
826fd892 | 317 | TClonesArray *particleshad1 = new TClonesArray("TParticle",1000); |
318 | TClonesArray *particleshad2 = new TClonesArray("TParticle",1000); | |
84555c93 | 319 | |
826fd892 | 320 | TList *particleslist = new TList(); |
321 | particleslist->Add(particleshad1); | |
322 | particleslist->Add(particleshad2); | |
323 | ||
324 | TDatabasePDG *pDataBase = TDatabasePDG::Instance(); | |
325 | ||
84555c93 | 326 | // Calculating vertex position per event |
61eb7ba5 | 327 | if (fVertexSmear==kPerEvent) { |
328 | Vertex(); | |
329 | for (i=0;i<2;i++){ | |
826fd892 | 330 | for (j=0;j<3;j++) origin0[i][j]=fVertex[j]; |
331 | } | |
2c890605 | 332 | } |
61eb7ba5 | 333 | else { |
334 | for (i=0;i<2;i++){ | |
335 | for (j=0;j<3;j++) origin0[i][j]=fOrigin[j]; | |
336 | } | |
337 | } | |
2c890605 | 338 | |
826fd892 | 339 | ipa = 0; |
340 | ipa1 = 0; | |
341 | ipa0 = 0; | |
84555c93 | 342 | |
9fd56238 | 343 | // Generating fNpart HF-hadron pairs |
84555c93 | 344 | fNprimaries = 0; |
826fd892 | 345 | |
84555c93 | 346 | while (ipa<2*fNpart) { |
826fd892 | 347 | |
84555c93 | 348 | GetQuarkPair(fFile, fgIntegral, yq[0], yq[1], ptq[0], ptq[1], dphi); |
349 | ||
350 | GetHadronPair(fFile, fQuark, yq[0], yq[1], ptq[0], ptq[1], ihadron[0], ihadron[1], plh[0], plh[1], pth[0], pth[1]); | |
351 | ||
4bac9bd3 | 352 | // Boost particles from c.m.s. to ALICE lab frame for p-Pb & Pb-p collisions |
353 | if (fEnergy == 5 || fEnergy == -5 || fEnergy == 9 || fEnergy == -9) { | |
9fd56238 | 354 | Double_t dyBoost = 0.47; |
355 | Double_t beta = TMath::TanH(dyBoost); | |
356 | Double_t gamma = 1./TMath::Sqrt((1.-beta)*(1.+beta)); | |
357 | Double_t gb = gamma * beta; | |
358 | yq[0] += dyBoost; | |
359 | yq[1] += dyBoost; | |
360 | plh[0] = gb * TMath::Sqrt(plh[0]*plh[0] + pth[0]*pth[0]) + gamma * plh[0]; | |
361 | plh[1] = gb * TMath::Sqrt(plh[1]*plh[1] + pth[1]*pth[1]) + gamma * plh[1]; | |
4bac9bd3 | 362 | if (fEnergy == 5 || fEnergy == 9) { |
9fd56238 | 363 | yq[0] *= -1; |
364 | yq[1] *= -1; | |
365 | plh[0] *= -1; | |
366 | plh[1] *= -1; | |
367 | } | |
368 | } | |
826fd892 | 369 | |
84555c93 | 370 | // Cuts from AliGenerator |
371 | ||
372 | // Cut on theta | |
373 | theta=TMath::ATan2(pth[0],plh[0]); | |
b33adf51 | 374 | if (theta<fThetaMin || theta>fThetaMax) continue; |
84555c93 | 375 | theta=TMath::ATan2(pth[1],plh[1]); |
b33adf51 | 376 | if (theta<fThetaMin || theta>fThetaMax) continue; |
84555c93 | 377 | |
378 | // Cut on momentum | |
379 | ph[0]=TMath::Sqrt(pth[0]*pth[0]+plh[0]*plh[0]); | |
380 | if (ph[0]<fPMin || ph[0]>fPMax) continue; | |
381 | ph[1]=TMath::Sqrt(pth[1]*pth[1]+plh[1]*plh[1]); | |
382 | if (ph[1]<fPMin || ph[1]>fPMax) continue; | |
383 | ||
384 | // Add the quarks in the stack | |
385 | ||
386 | phiq[0] = Rndm()*k2PI; | |
387 | if (Rndm() < 0.5) { | |
b44c3901 | 388 | phiq[1] = phiq[0] + dphi*kDegrad; |
84555c93 | 389 | } else { |
390 | phiq[1] = phiq[0] - dphi*kDegrad; | |
391 | } | |
392 | if (phiq[1] > k2PI) phiq[1] -= k2PI; | |
393 | if (phiq[1] < 0 ) phiq[1] += k2PI; | |
394 | ||
395 | // quarks pdg | |
396 | iquark[0] = +fQuark; | |
397 | iquark[1] = -fQuark; | |
826fd892 | 398 | |
84555c93 | 399 | // px and py |
400 | TVector2 qvect1 = TVector2(); | |
401 | TVector2 qvect2 = TVector2(); | |
402 | qvect1.SetMagPhi(ptq[0],phiq[0]); | |
403 | qvect2.SetMagPhi(ptq[1],phiq[1]); | |
404 | pq[0][0] = qvect1.Px(); | |
405 | pq[0][1] = qvect1.Py(); | |
406 | pq[1][0] = qvect2.Px(); | |
407 | pq[1][1] = qvect2.Py(); | |
826fd892 | 408 | |
84555c93 | 409 | // pz |
cb11fd27 | 410 | tanhy2 = TMath::TanH(yq[0]); |
411 | tanhy2 *= tanhy2; | |
412 | pq[0][2] = TMath::Sqrt((ptq[0]*ptq[0]+qm*qm)*tanhy2/(1-tanhy2)); | |
413 | pq[0][2] = TMath::Sign((Double_t)pq[0][2],yq[0]); | |
414 | tanhy2 = TMath::TanH(yq[1]); | |
415 | tanhy2 *= tanhy2; | |
416 | pq[1][2] = TMath::Sqrt((ptq[1]*ptq[1]+qm*qm)*tanhy2/(1-tanhy2)); | |
417 | pq[1][2] = TMath::Sign((Double_t)pq[1][2],yq[1]); | |
826fd892 | 418 | |
84555c93 | 419 | // Here we assume that |phi_H1 - phi_H2| = |phi_Q1 - phi_Q2| = dphi |
420 | // which is a good approximation for heavy flavors in Pythia | |
421 | // ... moreover, same phi angles as for the quarks ... | |
422 | ||
423 | phih[0] = phiq[0]; | |
424 | phih[1] = phiq[1]; | |
826fd892 | 425 | |
426 | ipa1 = 0; | |
b44c3901 | 427 | |
826fd892 | 428 | for (ihad = 0; ihad < 2; ihad++) { |
429 | while(1) { | |
430 | ||
431 | ipa0=ipa1; | |
84555c93 | 432 | |
826fd892 | 433 | // particle type |
434 | fChildWeight=(fDecayer->GetPartialBranchingRatio(ihadron[ihad]))*fParentWeight; | |
435 | wgtp[ihad]=fParentWeight; | |
436 | wgtch[ihad]=fChildWeight; | |
437 | TParticlePDG *particle = pDataBase->GetParticle(ihadron[ihad]); | |
438 | Float_t am = particle->Mass(); | |
439 | phi = phih[ihad]; | |
440 | pt = pth[ihad]; | |
441 | pl = plh[ihad]; | |
442 | ptot=TMath::Sqrt(pt*pt+pl*pl); | |
84555c93 | 443 | |
826fd892 | 444 | p[ihad][0]=pt*TMath::Cos(phi); |
445 | p[ihad][1]=pt*TMath::Sin(phi); | |
446 | p[ihad][2]=pl; | |
447 | ||
448 | if(fVertexSmear==kPerTrack) { | |
449 | Rndm(random,6); | |
450 | for (j=0;j<3;j++) { | |
451 | origin0[ihad][j]= | |
452 | fOrigin[j]+fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
453 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
454 | } | |
84555c93 | 455 | } |
456 | ||
826fd892 | 457 | // Looking at fForceDecay : |
458 | // if fForceDecay != none Primary particle decays using | |
459 | // AliPythia and children are tracked by GEANT | |
460 | // | |
461 | // if fForceDecay == none Primary particle is tracked by GEANT | |
462 | // (In the latest, make sure that GEANT actually does all the decays you want) | |
463 | ||
464 | if (fForceDecay != kNoDecay) { | |
465 | // Using lujet to decay particle | |
466 | Float_t energy=TMath::Sqrt(ptot*ptot+am*am); | |
467 | TLorentzVector pmom(p[ihad][0], p[ihad][1], p[ihad][2], energy); | |
468 | fDecayer->Decay(ihadron[ihad],&pmom); | |
469 | ||
470 | // select decay particles | |
471 | ||
472 | np[ihad]=fDecayer->ImportParticles((TClonesArray *)particleslist->At(ihad)); | |
473 | ||
474 | // Selecting GeometryAcceptance for particles fPdgCodeParticleforAcceptanceCut; | |
475 | ||
476 | if (fGeometryAcceptance) | |
477 | if (!CheckAcceptanceGeometry(np[ihad],(TClonesArray*)particleslist->At(ihad))) continue; | |
478 | ||
479 | trackIt[ihad] = new Int_t [np[ihad]]; | |
480 | pSelected[ihad] = new Int_t [np[ihad]]; | |
481 | Int_t* pFlag = new Int_t [np[ihad]]; | |
482 | ||
483 | for (i=0; i<np[ihad]; i++) { | |
484 | pFlag[i] = 0; | |
485 | pSelected[ihad][i] = 0; | |
486 | } | |
487 | ||
488 | if (np[ihad] >1) { | |
489 | TParticle* iparticle = 0; | |
490 | Int_t ipF, ipL; | |
84555c93 | 491 | |
826fd892 | 492 | for (i = 1; i<np[ihad] ; i++) { |
493 | trackIt[ihad][i] = 1; | |
494 | iparticle = | |
495 | (TParticle *) ((TClonesArray *) particleslist->At(ihad))->At(i); | |
496 | Int_t kf = iparticle->GetPdgCode(); | |
497 | Int_t ks = iparticle->GetStatusCode(); | |
498 | // flagged particle | |
499 | if (pFlag[i] == 1) { | |
84555c93 | 500 | ipF = iparticle->GetFirstDaughter(); |
501 | ipL = iparticle->GetLastDaughter(); | |
502 | if (ipF > 0) for (j=ipF-1; j<ipL; j++) pFlag[j]=1; | |
826fd892 | 503 | continue; |
2c890605 | 504 | } |
505 | ||
826fd892 | 506 | // flag decay products of particles with long life-time (c tau > .3 mum) |
507 | if (ks != 1) { | |
508 | Double_t lifeTime = fDecayer->GetLifetime(kf); | |
509 | if (lifeTime > (Double_t) fMaxLifeTime) { | |
510 | ipF = iparticle->GetFirstDaughter(); | |
511 | ipL = iparticle->GetLastDaughter(); | |
512 | if (ipF > 0) for (j=ipF-1; j<ipL; j++) pFlag[j]=1; | |
513 | } else { | |
514 | trackIt[ihad][i] = 0; | |
515 | pSelected[ihad][i] = 1; | |
516 | } | |
517 | } // ks==1 ? | |
518 | // | |
519 | // children | |
520 | if ((ChildSelected(TMath::Abs(kf)) || fForceDecay == kAll || fSelectAll) && trackIt[ihad][i]) | |
521 | { | |
522 | if (fCutOnChild) { | |
523 | pc[0]=iparticle->Px(); | |
524 | pc[1]=iparticle->Py(); | |
525 | pc[2]=iparticle->Pz(); | |
526 | //printf("px %f py %f pz %f\n",pc[0],pc[1],pc[2]); | |
527 | Bool_t childok = KinematicSelection(iparticle, 1); | |
528 | if(childok) { | |
529 | pSelected[ihad][i] = 1; | |
530 | ncsel[ihad]++; | |
531 | } else { | |
532 | ncsel[ihad]=-1; | |
533 | break; | |
534 | } // child kine cuts | |
535 | } else { | |
536 | pSelected[ihad][i] = 1; | |
537 | ncsel[ihad]++; | |
538 | } // if child selection | |
539 | } // select muon | |
540 | } // decay particle loop | |
541 | } // if decay products | |
542 | ||
543 | if ((fCutOnChild && ncsel[ihad] >0) || !fCutOnChild) ipa1++; | |
544 | ||
545 | if (pFlag) delete[] pFlag; | |
546 | ||
547 | } // kinematic selection | |
548 | else // nodecay option, so parent will be tracked by GEANT (pions, kaons, eta, omegas, baryons) | |
549 | { | |
550 | gAlice->GetMCApp()-> | |
551 | PushTrack(fTrackIt,-1,ihadron[ihad],p[ihad],origin0[ihad],polar[ihad],0,kPPrimary,nt,wgtp[ihad]); | |
552 | ipa1++; | |
553 | fNprimaries++; | |
554 | ||
555 | } | |
556 | break; | |
557 | } // while(1) loop | |
558 | if (ipa1<ipa0+1){ | |
559 | ipa1=0; | |
560 | if (pSelected[ihad]) delete pSelected[ihad]; | |
561 | if (trackIt[ihad]) delete trackIt[ihad]; | |
562 | particleshad1->Clear(); | |
563 | particleshad2->Clear(); | |
564 | break; | |
565 | }//go out of loop and generate new pair if at least one hadron is rejected | |
84555c93 | 566 | } // hadron pair loop |
826fd892 | 567 | if(ipa1==2){ |
568 | ||
569 | ipa=ipa+ipa1; | |
570 | ||
571 | if(fForceDecay != kNoDecay){ | |
572 | for(ihad=0;ihad<2;ihad++){ | |
573 | ||
574 | //load tracks in the stack if both hadrons of the pair accepted | |
575 | LoadTracks(iquark[ihad],pq[ihad],ihadron[ihad],p[ihad],np[ihad], | |
576 | (TClonesArray *)particleslist->At(ihad),origin0[ihad], | |
577 | polar[ihad],wgtp[ihad],wgtch[ihad],nt,ncsel[ihad], | |
578 | pSelected[ihad],trackIt[ihad]); | |
579 | ||
580 | if (pSelected[ihad]) delete pSelected[ihad]; | |
581 | if (trackIt[ihad]) delete trackIt[ihad]; | |
9fd56238 | 582 | |
826fd892 | 583 | } |
584 | particleshad1->Clear(); | |
585 | particleshad2->Clear(); | |
586 | } | |
587 | } | |
588 | } // while (ipa<2*fNpart) loop | |
589 | ||
2c890605 | 590 | SetHighWaterMark(nt); |
84555c93 | 591 | |
cb11fd27 | 592 | AliGenEventHeader* header = new AliGenEventHeader("CorrHF"); |
84555c93 | 593 | header->SetPrimaryVertex(fVertex); |
594 | header->SetNProduced(fNprimaries); | |
595 | AddHeader(header); | |
826fd892 | 596 | |
597 | ||
598 | delete particleshad1; | |
599 | delete particleshad2; | |
600 | delete particleslist; | |
601 | ||
00fce64a | 602 | delete[] pSelected; |
603 | delete[] trackIt; | |
84555c93 | 604 | } |
2c890605 | 605 | //____________________________________________________________________________________ |
9fd56238 | 606 | void AliGenCorrHF::IpCharm(TH2F *hProbHH, Int_t &pdg3, Int_t &pdg4) |
2c890605 | 607 | { |
9fd56238 | 608 | // Composition of a lower state charm hadron pair from a ccbar quark pair |
609 | Int_t pdgH[] = {411, 421, 431, 4122, 4132, 4232, 4332}; | |
610 | ||
611 | Double_t id3, id4; | |
612 | hProbHH->GetRandom2(id3, id4); | |
613 | pdg3 = pdgH[(Int_t)TMath::Floor(id3)]; | |
614 | pdg4 = -1*pdgH[(Int_t)TMath::Floor(id4)]; | |
615 | ||
616 | return; | |
2c890605 | 617 | } |
618 | ||
9fd56238 | 619 | void AliGenCorrHF::IpBeauty(TH2F *hProbHH, Int_t &pdg3, Int_t &pdg4) |
2c890605 | 620 | { |
9fd56238 | 621 | // Composition of a lower state beauty hadron pair from a bbbar quark pair |
622 | // B-Bbar mixing will be done by Pythia at their decay point | |
623 | Int_t pdgH[] = {511, 521, 531, 5122, 5132, 5232, 5332}; | |
624 | ||
625 | Double_t id3, id4; | |
626 | hProbHH->GetRandom2(id3, id4); | |
627 | pdg3 = pdgH[(Int_t)TMath::Floor(id3)]; | |
628 | pdg4 = -1*pdgH[(Int_t)TMath::Floor(id4)]; | |
629 | ||
630 | if ( (pdg3== 511) || (pdg3== 521) || (pdg3== 531) ) pdg3 *= -1; | |
631 | if ( (pdg4==-511) || (pdg4==-521) || (pdg4==-531) ) pdg4 *= -1; | |
632 | ||
633 | return; | |
2c890605 | 634 | } |
635 | ||
636 | //____________________________________________________________________________________ | |
637 | Double_t AliGenCorrHF::ComputeIntegral(TFile* fG) // needed by GetQuarkPair | |
638 | { | |
639 | // Read QQbar kinematical 5D grid's cell occupancy weights | |
4c111067 | 640 | Int_t cell[6]; // cell[6]={wght,iy1,iy2,ipt1,ipt2,idph} |
2c890605 | 641 | TTree* tG = (TTree*) fG->Get("tGqq"); |
4c111067 | 642 | tG->GetBranch("cell")->SetAddress(&cell); |
2c890605 | 643 | Int_t nbins = tG->GetEntries(); |
644 | ||
645 | // delete previously computed integral (if any) | |
646 | if(fgIntegral) delete [] fgIntegral; | |
647 | ||
648 | fgIntegral = new Double_t[nbins+1]; | |
649 | fgIntegral[0] = 0; | |
650 | Int_t bin; | |
651 | for(bin=0;bin<nbins;bin++) { | |
652 | tG->GetEvent(bin); | |
653 | fgIntegral[bin+1] = fgIntegral[bin] + cell[0]; | |
654 | } | |
655 | // Normalize integral to 1 | |
656 | if (fgIntegral[nbins] == 0 ) { | |
657 | return 0; | |
658 | } | |
659 | for (bin=1;bin<=nbins;bin++) fgIntegral[bin] /= fgIntegral[nbins]; | |
660 | ||
661 | return fgIntegral[nbins]; | |
662 | } | |
663 | ||
826fd892 | 664 | |
2c890605 | 665 | //____________________________________________________________________________________ |
666 | void AliGenCorrHF::GetQuarkPair(TFile* fG, Double_t* fInt, Double_t &y1, Double_t &y2, Double_t &pt1, Double_t &pt2, Double_t &dphi) | |
667 | // modification of ROOT's TH3::GetRandom3 for 5D | |
668 | { | |
669 | // Read QQbar kinematical 5D grid's cell coordinates | |
4c111067 | 670 | Int_t cell[6]; // cell[6]={wght,iy1,iy2,ipt1,ipt2,idph} |
2c890605 | 671 | TTree* tG = (TTree*) fG->Get("tGqq"); |
4c111067 | 672 | tG->GetBranch("cell")->SetAddress(&cell); |
2c890605 | 673 | Int_t nbins = tG->GetEntries(); |
674 | Double_t rand[6]; | |
675 | gRandom->RndmArray(6,rand); | |
676 | Int_t ibin = TMath::BinarySearch(nbins,fInt,rand[0]); | |
677 | tG->GetEvent(ibin); | |
678 | y1 = fgy[cell[1]] + (fgy[cell[1]+1]-fgy[cell[1]])*rand[1]; | |
679 | y2 = fgy[cell[2]] + (fgy[cell[2]+1]-fgy[cell[2]])*rand[2]; | |
680 | pt1 = fgpt[cell[3]] + (fgpt[cell[3]+1]-fgpt[cell[3]])*rand[3]; | |
681 | pt2 = fgpt[cell[4]] + (fgpt[cell[4]+1]-fgpt[cell[4]])*rand[4]; | |
682 | dphi = fgdph[cell[5]]+ (fgdph[cell[5]+1]-fgdph[cell[5]])*rand[5]; | |
683 | } | |
684 | ||
685 | //____________________________________________________________________________________ | |
686 | void AliGenCorrHF::GetHadronPair(TFile* fG, Int_t idq, Double_t y1, Double_t y2, Double_t pt1, Double_t pt2, Int_t &id3, Int_t &id4, Double_t &pz3, Double_t &pz4, Double_t &pt3, Double_t &pt4) | |
687 | { | |
688 | // Generate a hadron pair | |
9fd56238 | 689 | void (*fIpParaFunc)(TH2F *, Int_t &, Int_t &);//Pointer to hadron pair composition function |
2c890605 | 690 | fIpParaFunc = IpCharm; |
691 | Double_t mq = 1.2; // c & b quark masses (used in AliPythia) | |
692 | if (idq == 5) { | |
693 | fIpParaFunc = IpBeauty; | |
694 | mq = 4.75; | |
695 | } | |
08bffa4d | 696 | Double_t z11 = 0.; |
697 | Double_t z12 = 0.; | |
698 | Double_t z21 = 0.; | |
699 | Double_t z22 = 0.; | |
700 | Double_t pz1, pz2, e1, e2, mh, ptemp, rand[2]; | |
2c890605 | 701 | char tag[100]; |
9fd56238 | 702 | TH2F *h2h[12], *h2s[12], *hProbHH; // hard & soft fragmentation and HH-probability functions |
2c890605 | 703 | for (Int_t ipt = 0; ipt<fgnptbins; ipt++) { |
09298f0c | 704 | snprintf(tag,100, "h2h_pt%d",ipt); |
2c890605 | 705 | h2h[ipt] = (TH2F*) fG->Get(tag); |
09298f0c | 706 | snprintf(tag,100, "h2s_pt%d",ipt); |
2c890605 | 707 | h2s[ipt] = (TH2F*) fG->Get(tag); |
708 | } | |
709 | ||
710 | if (y1*y2 < 0) { | |
711 | for (Int_t ipt = 0; ipt<fgnptbins; ipt++) { | |
712 | if(pt1 >= fgptbmin[ipt] && pt1 < fgptbmax[ipt]) | |
713 | h2h[ipt]->GetRandom2(z11, z21); | |
714 | if(pt2 >= fgptbmin[ipt] && pt2 < fgptbmax[ipt]) | |
715 | h2h[ipt]->GetRandom2(z12, z22); | |
716 | } | |
717 | } | |
718 | else { | |
719 | if (TMath::Abs(y1) > TMath::Abs(y2)) { | |
720 | for (Int_t ipt = 0; ipt<fgnptbins; ipt++) { | |
721 | if(pt1 >= fgptbmin[ipt] && pt1 < fgptbmax[ipt]) | |
722 | h2h[ipt]->GetRandom2(z11, z21); | |
723 | if(pt2 >= fgptbmin[ipt] && pt2 < fgptbmax[ipt]) | |
724 | h2s[ipt]->GetRandom2(z12, z22); | |
725 | } | |
726 | } | |
727 | else { | |
728 | for (Int_t ipt = 0; ipt<fgnptbins; ipt++) { | |
729 | if(pt1 >= fgptbmin[ipt] && pt1 < fgptbmax[ipt]) | |
730 | h2s[ipt]->GetRandom2(z11, z21); | |
731 | if(pt2 >= fgptbmin[ipt] && pt2 < fgptbmax[ipt]) | |
732 | h2h[ipt]->GetRandom2(z12, z22); | |
733 | } | |
734 | } | |
735 | } | |
736 | gRandom->RndmArray(2,rand); | |
737 | ptemp = TMath::Sqrt(pt1*pt1 + mq*mq); | |
738 | pz1 = ptemp*TMath::SinH(y1); | |
739 | e1 = ptemp*TMath::CosH(y1); | |
740 | ptemp = TMath::Sqrt(pt2*pt2 + mq*mq); | |
741 | pz2 = ptemp*TMath::SinH(y2); | |
742 | e2 = ptemp*TMath::CosH(y2); | |
743 | ||
9fd56238 | 744 | hProbHH = (TH2F*)fG->Get("hProbHH"); |
745 | fIpParaFunc(hProbHH, id3, id4); | |
2c890605 | 746 | mh = TDatabasePDG::Instance()->GetParticle(id3)->Mass(); |
747 | ptemp = z11*z21*(e1*e1-pz1*pz1) - mh*mh; | |
b33adf51 | 748 | if (idq==5) pt3 = pt1; // an approximation at low pt, try better |
9fd56238 | 749 | else pt3 = rand[0]; // pt3=pt1 gives less D-hadrons at low pt |
2c890605 | 750 | if (ptemp > 0) pt3 = TMath::Sqrt(ptemp); |
751 | if (pz1 > 0) pz3 = (z11*(e1 + pz1) - z21*(e1 - pz1)) / 2; | |
752 | else pz3 = (z21*(e1 + pz1) - z11*(e1 - pz1)) / 2; | |
753 | e1 = TMath::Sqrt(pz3*pz3 + pt3*pt3 + mh*mh); | |
754 | ||
2c890605 | 755 | mh = TDatabasePDG::Instance()->GetParticle(id4)->Mass(); |
756 | ptemp = z12*z22*(e2*e2-pz2*pz2) - mh*mh; | |
b33adf51 | 757 | if (idq==5) pt4 = pt2; // an approximation at low pt, try better |
758 | else pt4 = rand[1]; | |
2c890605 | 759 | if (ptemp > 0) pt4 = TMath::Sqrt(ptemp); |
760 | if (pz2 > 0) pz4 = (z12*(e2 + pz2) - z22*(e2 - pz2)) / 2; | |
761 | else pz4 = (z22*(e2 + pz2) - z12*(e2 - pz2)) / 2; | |
762 | e2 = TMath::Sqrt(pz4*pz4 + pt4*pt4 + mh*mh); | |
763 | ||
764 | // small corr. instead of using Frag. Func. depending on yQ (in addition to ptQ) | |
765 | Float_t ycorr = 0.2, y3, y4; | |
766 | gRandom->RndmArray(2,rand); | |
767 | y3 = 0.5 * TMath::Log((e1 + pz3 + 1.e-13)/(e1 - pz3 + 1.e-13)); | |
768 | y4 = 0.5 * TMath::Log((e2 + pz4 + 1.e-13)/(e2 - pz4 + 1.e-13)); | |
769 | if(TMath::Abs(y3)<ycorr && TMath::Abs(y4)<ycorr && rand[0]>0.5) { | |
bfd20868 | 770 | ptemp = TMath::Sqrt((e1-pz3)*(e1+pz3)); |
2c890605 | 771 | y3 = 4*(1 - 2*rand[1]); |
772 | pz3 = ptemp*TMath::SinH(y3); | |
773 | pz4 = pz3; | |
774 | } | |
775 | } | |
5cc3bcd2 | 776 | |
826fd892 | 777 | |
778 | //____________________________________________________________________________________ | |
779 | void AliGenCorrHF::LoadTracks(Int_t iquark, Float_t *pq, | |
780 | Int_t iPart, Float_t *p, | |
781 | Int_t np, TClonesArray *particles, | |
782 | Float_t *origin0, Float_t *polar, | |
783 | Float_t wgtp, Float_t wgtch, | |
784 | Int_t &nt, Int_t ncsel, Int_t *pSelected, | |
785 | Int_t *trackIt){ | |
786 | Int_t i; | |
787 | Int_t ntq=-1; | |
788 | Int_t* pParent = new Int_t[np]; | |
789 | Float_t pc[3], och[3]; | |
790 | Int_t iparent; | |
791 | ||
792 | for(i=0;i<np;i++) pParent[i]=-1; | |
793 | ||
794 | if ((fCutOnChild && ncsel >0) || !fCutOnChild){ | |
795 | // Parents | |
796 | // quark | |
797 | PushTrack(0, -1, iquark, pq, origin0, polar, 0, kPPrimary, nt, wgtp); | |
798 | KeepTrack(nt); | |
799 | ntq = nt; | |
800 | // hadron | |
801 | PushTrack(0, ntq, iPart, p, origin0, polar, 0, kPDecay, nt, wgtp); | |
802 | pParent[0] = nt; | |
803 | KeepTrack(nt); | |
804 | fNprimaries++; | |
805 | ||
806 | // Decay Products | |
807 | for (i = 1; i < np; i++) { | |
808 | if (pSelected[i]) { | |
809 | ||
810 | TParticle* iparticle = (TParticle *) particles->At(i); | |
811 | Int_t kf = iparticle->GetPdgCode(); | |
812 | Int_t jpa = iparticle->GetFirstMother()-1; | |
774ceaaf | 813 | // RS: note, the conversion mm->cm is done now in the decayer. The time is ignored here! |
814 | och[0] = origin0[0]+iparticle->Vx(); | |
815 | och[1] = origin0[1]+iparticle->Vy(); | |
816 | och[2] = origin0[2]+iparticle->Vz(); | |
826fd892 | 817 | pc[0] = iparticle->Px(); |
818 | pc[1] = iparticle->Py(); | |
819 | pc[2] = iparticle->Pz(); | |
820 | ||
821 | if (jpa > -1) { | |
822 | iparent = pParent[jpa]; | |
823 | } else { | |
824 | iparent = -1; | |
825 | } | |
826 | ||
827 | PushTrack(fTrackIt*trackIt[i], iparent, kf, | |
828 | pc, och, polar, | |
829 | 0, kPDecay, nt, wgtch); | |
830 | pParent[i] = nt; | |
831 | KeepTrack(nt); | |
832 | fNprimaries++; | |
833 | ||
834 | } // Selected | |
835 | } // Particle loop | |
836 | } | |
837 | if (pParent) delete[] pParent; | |
838 | ||
839 | return; | |
840 | } | |
841 |