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5b3a5a5d | 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 | ||
88cb7938 | 16 | /* $Id$ */ |
041f7f97 | 17 | // |
65aa45f2 | 18 | // Utility class to make simple Glauber type calculations |
a42548b0 | 19 | // for SYMMETRIC collision geometries (AA): |
041f7f97 | 20 | // Impact parameter, production points, reaction plane dependence |
65aa45f2 | 21 | // |
041f7f97 | 22 | // The SimulateTrigger method can be used for simple MB and hard-process |
23 | // (binary scaling) trigger studies. | |
65aa45f2 | 24 | // |
041f7f97 | 25 | // Some basic quantities can be visualized directly. |
041f7f97 | 26 | // |
65aa45f2 | 27 | // The default set-up for PbPb or AUAu collisions can be read from a file |
28 | // calling Init(1) or Init(2) if you want to read Almonds too. | |
29 | // | |
30 | // ***** If you change settings dont forget to call init afterwards, ***** | |
31 | // ***** in order to update the formulas with the new parameters. ***** | |
041f7f97 | 32 | // |
33 | // Author: andreas.morsch@cern.ch | |
65aa45f2 | 34 | //=================== Added by A. Dainese 11/02/04 =========================== |
35 | // Calculate path length for a parton with production point (x0,y0) | |
36 | // and propagation direction (ux=cos(phi0),uy=sin(phi0)) | |
37 | // in a collision with impact parameter b and functions that make use | |
38 | // of it. | |
39 | //=================== Added by A. Dainese 05/03/04 =========================== | |
40 | // Calculation of line integrals I0 and I1 | |
41 | // integral0 = \int_0^ellCut dl*(T_A*T_B)(x0+l*ux,y0+l*uy) | |
42 | // integral1 = \int_0^ellCut dl*l*(T_A*T_B)(x0+l*ux,y0+l*uy) | |
43 | // mostly for use in the Quenching class | |
44 | //=================== Added by C. Loizdes 27/03/04 =========================== | |
45 | // Handling of AuAu collisions | |
46 | // More get/set functions | |
47 | // Comments, units and clearing of code | |
48 | // | |
5b3a5a5d | 49 | |
50 | // from AliRoot | |
51 | #include "AliFastGlauber.h" | |
52 | // from root | |
a2f2f511 | 53 | #include <TStyle.h> |
5b3a5a5d | 54 | #include <TH1F.h> |
a2f2f511 | 55 | #include <TH2F.h> |
5b3a5a5d | 56 | #include <TF1.h> |
57 | #include <TF2.h> | |
65aa45f2 | 58 | #include <TLegend.h> |
5b3a5a5d | 59 | #include <TCanvas.h> |
60 | #include <TRandom.h> | |
61 | #include <TFile.h> | |
65aa45f2 | 62 | #include <TROOT.h> |
63 | #include <Riostream.h> | |
5b3a5a5d | 64 | |
65 | ClassImp(AliFastGlauber) | |
66 | ||
65aa45f2 | 67 | Float_t AliFastGlauber::fgBMax = 0.; |
041f7f97 | 68 | TF1* AliFastGlauber::fgWSb = NULL; |
69 | TF2* AliFastGlauber::fgWSbz = NULL; | |
70 | TF1* AliFastGlauber::fgWSz = NULL; | |
71 | TF1* AliFastGlauber::fgWSta = NULL; | |
72 | TF2* AliFastGlauber::fgWStarfi = NULL; | |
73 | TF2* AliFastGlauber::fgWAlmond = NULL; | |
74 | TF1* AliFastGlauber::fgWStaa = NULL; | |
75 | TF1* AliFastGlauber::fgWSgeo = NULL; | |
76 | TF1* AliFastGlauber::fgWSbinary = NULL; | |
77 | TF1* AliFastGlauber::fgWSN = NULL; | |
78 | TF1* AliFastGlauber::fgWPathLength0 = NULL; | |
79 | TF1* AliFastGlauber::fgWPathLength = NULL; | |
80 | TF1* AliFastGlauber::fgWEnergyDensity = NULL; | |
81 | TF1* AliFastGlauber::fgWIntRadius = NULL; | |
1bc228f5 | 82 | TF2* AliFastGlauber::fgWKParticipants = NULL; |
83 | TF1* AliFastGlauber::fgWParticipants = NULL; | |
65aa45f2 | 84 | TF2* AliFastGlauber::fgWAlmondCurrent = NULL; |
7f2f270b | 85 | TF2* AliFastGlauber::fgWAlmondFixedB[40]; |
65aa45f2 | 86 | const Int_t AliFastGlauber::fgkMCInts = 100000; |
87 | Int_t AliFastGlauber::fgCounter = 0; | |
5b3a5a5d | 88 | |
65aa45f2 | 89 | AliFastGlauber::AliFastGlauber() : fName() |
5b3a5a5d | 90 | { |
a42548b0 | 91 | // Default Constructor |
65aa45f2 | 92 | fgCounter++; |
93 | if(fgCounter>1) | |
94 | Error("AliFastGlauber","More than more instance (%d) is not supported, check your code!",fgCounter); | |
95 | ||
96 | // Defaults for Pb | |
97 | SetMaxImpact(); | |
98 | SetLengthDefinition(); | |
99 | SetPbPbLHC(); | |
100 | } | |
101 | ||
a42548b0 | 102 | AliFastGlauber::AliFastGlauber(const AliFastGlauber & gl) |
103 | :TObject(gl) | |
104 | { | |
105 | // Copy constructor | |
106 | gl.Copy(*this); | |
107 | } | |
108 | ||
65aa45f2 | 109 | AliFastGlauber::~AliFastGlauber() |
110 | { | |
a42548b0 | 111 | // Destructor |
65aa45f2 | 112 | fgCounter--; |
7f2f270b | 113 | for(Int_t k=0; k<40; k++) delete fgWAlmondFixedB[k]; |
65aa45f2 | 114 | } |
115 | ||
116 | void AliFastGlauber::SetAuAuRhic() | |
117 | { | |
118 | //Set all parameters for RHIC | |
119 | SetWoodSaxonParametersAu(); | |
120 | SetHardCrossSection(); | |
710a8d90 | 121 | SetNNCrossSection(42); |
65aa45f2 | 122 | SetNucleus(197); |
123 | SetFileName("$(ALICE_ROOT)/FASTSIM/data/glauberAuAu.root"); | |
124 | } | |
125 | ||
126 | void AliFastGlauber::SetPbPbLHC() | |
127 | { | |
128 | //Set all parameters for LHC | |
129 | SetWoodSaxonParametersPb(); | |
130 | SetHardCrossSection(); | |
131 | SetNNCrossSection(); | |
132 | SetNucleus(); | |
133 | SetFileName(); | |
5b3a5a5d | 134 | } |
135 | ||
136 | void AliFastGlauber::Init(Int_t mode) | |
137 | { | |
65aa45f2 | 138 | // Initialisation |
139 | // mode = 0; all functions are calculated | |
140 | // mode = 1; overlap function is read from file (for Pb-Pb only) | |
141 | // mode = 2; interaction almond functions are read from file | |
142 | // USE THIS FOR PATH LENGTH CALC.! | |
143 | // | |
a2f2f511 | 144 | |
65aa45f2 | 145 | // |
146 | Reset(); | |
147 | // | |
5b3a5a5d | 148 | |
65aa45f2 | 149 | // |
150 | // Wood-Saxon | |
151 | // | |
152 | fgWSb = new TF1("WSb", WSb, 0, fgBMax, 4); | |
153 | fgWSb->SetParameter(0, fWSr0); | |
154 | fgWSb->SetParameter(1, fWSd); | |
155 | fgWSb->SetParameter(2, fWSw); | |
156 | fgWSb->SetParameter(3, fWSn); | |
157 | ||
fac5662b | 158 | fgWSbz = new TF2("WSbz", WSbz, 0, fgBMax, 0, fgBMax, 4); |
65aa45f2 | 159 | fgWSbz->SetParameter(0, fWSr0); |
160 | fgWSbz->SetParameter(1, fWSd); | |
161 | fgWSbz->SetParameter(2, fWSw); | |
162 | fgWSbz->SetParameter(3, fWSn); | |
163 | ||
164 | fgWSz = new TF1("WSz", WSz, 0, fgBMax, 5); | |
165 | fgWSz->SetParameter(0, fWSr0); | |
166 | fgWSz->SetParameter(1, fWSd); | |
167 | fgWSz->SetParameter(2, fWSw); | |
168 | fgWSz->SetParameter(3, fWSn); | |
169 | ||
170 | // | |
171 | // Thickness | |
172 | // | |
173 | fgWSta = new TF1("WSta", WSta, 0., fgBMax, 0); | |
5b3a5a5d | 174 | |
65aa45f2 | 175 | // |
176 | // Overlap Kernel | |
177 | // | |
178 | fgWStarfi = new TF2("WStarfi", WStarfi, 0., fgBMax, 0., TMath::Pi(), 1); | |
179 | fgWStarfi->SetParameter(0, 0.); | |
180 | fgWStarfi->SetNpx(200); | |
181 | fgWStarfi->SetNpy(20); | |
8de7e046 | 182 | |
65aa45f2 | 183 | // |
184 | // Participants Kernel | |
185 | // | |
186 | fgWKParticipants = new TF2("WKParticipants", WKParticipants, 0., fgBMax, 0., TMath::Pi(), 3); | |
187 | fgWKParticipants->SetParameter(0, 0.); | |
188 | fgWKParticipants->SetParameter(1, fSigmaNN); | |
189 | fgWKParticipants->SetParameter(2, fA); | |
190 | fgWKParticipants->SetNpx(200); | |
191 | fgWKParticipants->SetNpy(20); | |
f3a04204 | 192 | |
65aa45f2 | 193 | // |
194 | // Overlap and Participants | |
195 | // | |
196 | if (!mode) { | |
197 | fgWStaa = new TF1("WStaa", WStaa, 0., fgBMax, 1); | |
198 | fgWStaa->SetNpx(100); | |
199 | fgWStaa->SetParameter(0,fA); | |
200 | fgWStaa->SetNpx(100); | |
201 | fgWParticipants = new TF1("WParticipants", WParticipants, 0., fgBMax, 2); | |
202 | fgWParticipants->SetParameter(0, fSigmaNN); | |
203 | fgWParticipants->SetParameter(1, fA); | |
204 | fgWParticipants->SetNpx(100); | |
205 | } else { | |
206 | Info("Init","Reading overlap function from file %s",fName.Data()); | |
207 | TFile* f = new TFile(fName.Data()); | |
208 | if(!f->IsOpen()){ | |
209 | Fatal("Init", "Could not open file %s",fName.Data()); | |
210 | } | |
211 | fgWStaa = (TF1*) f->Get("WStaa"); | |
212 | fgWParticipants = (TF1*) f->Get("WParticipants"); | |
213 | delete f; | |
214 | } | |
2a103154 | 215 | |
65aa45f2 | 216 | // |
217 | // Energy Density | |
218 | // | |
219 | fgWEnergyDensity = new TF1("WEnergyDensity", WEnergyDensity, 0., 2. * fWSr0, 1); | |
220 | fgWEnergyDensity->SetParameter(0, fWSr0 + 1.); | |
221 | ||
222 | // | |
223 | // Geometrical Cross-Section | |
224 | // | |
225 | fgWSgeo = new TF1("WSgeo", WSgeo, 0., fgBMax, 1); | |
226 | fgWSgeo->SetParameter(0,fSigmaNN); //mbarn | |
227 | fgWSgeo->SetNpx(100); | |
2a103154 | 228 | |
65aa45f2 | 229 | // |
230 | // Hard cross section (binary collisions) | |
231 | // | |
232 | fgWSbinary = new TF1("WSbinary", WSbinary, 0., fgBMax, 1); | |
233 | fgWSbinary->SetParameter(0, fSigmaHard); //mbarn | |
234 | fgWSbinary->SetNpx(100); | |
1bc228f5 | 235 | |
65aa45f2 | 236 | // |
237 | // Hard collisions per event | |
238 | // | |
239 | fgWSN = new TF1("WSN", WSN, 0., fgBMax, 1); | |
240 | fgWSN->SetNpx(100); | |
241 | ||
242 | // | |
243 | // Almond shaped interaction region | |
244 | // | |
245 | fgWAlmond = new TF2("WAlmond", WAlmond, -fgBMax, fgBMax, -fgBMax, fgBMax, 1); | |
246 | fgWAlmond->SetParameter(0, 0.); | |
247 | fgWAlmond->SetNpx(200); | |
248 | fgWAlmond->SetNpy(200); | |
249 | ||
250 | if(mode==2) { | |
251 | Info("Init","Reading interaction almonds from file: %s",fName.Data()); | |
252 | Char_t almondName[100]; | |
253 | TFile* ff = new TFile(fName.Data()); | |
254 | for(Int_t k=0; k<40; k++) { | |
255 | sprintf(almondName,"WAlmondFixedB%d",k); | |
256 | fgWAlmondCurrent = (TF2*)ff->Get(almondName); | |
7f2f270b | 257 | fgWAlmondFixedB[k] = fgWAlmondCurrent; |
5b3a5a5d | 258 | } |
65aa45f2 | 259 | delete ff; |
260 | } | |
261 | ||
262 | fgWIntRadius = new TF1("WIntRadius", WIntRadius, 0., fgBMax, 1); | |
263 | fgWIntRadius->SetParameter(0, 0.); | |
264 | ||
265 | // | |
266 | // Path Length as a function of Phi | |
267 | // | |
268 | fgWPathLength0 = new TF1("WPathLength0", WPathLength0, -TMath::Pi(), TMath::Pi(), 2); | |
269 | fgWPathLength0->SetParameter(0, 0.); | |
270 | fgWPathLength0->SetParameter(1, 0.); //Pathlength definition | |
271 | ||
272 | fgWPathLength = new TF1("WPathLength", WPathLength, -TMath::Pi(), TMath::Pi(), 3); | |
273 | fgWPathLength->SetParameter(0, 0.); //Impact Parameter | |
274 | fgWPathLength->SetParameter(1, 1000.); //Number of interactions used for average | |
275 | fgWPathLength->SetParameter(2, 0); //Pathlength definition | |
276 | } | |
277 | ||
a42548b0 | 278 | void AliFastGlauber::Reset() const |
65aa45f2 | 279 | { |
280 | // | |
281 | // Reset dynamic allocated formulas | |
282 | // in case init is called twice | |
283 | ||
284 | if(fgWSb) delete fgWSb; | |
285 | if(fgWSbz) delete fgWSbz; | |
286 | if(fgWSz) delete fgWSz; | |
287 | if(fgWSta) delete fgWSta; | |
288 | if(fgWStarfi) delete fgWStarfi; | |
289 | if(fgWAlmond) delete fgWAlmond; | |
290 | if(fgWStaa) delete fgWStaa; | |
291 | if(fgWSgeo) delete fgWSgeo; | |
292 | if(fgWSbinary) delete fgWSbinary; | |
293 | if(fgWSN) delete fgWSN; | |
294 | if(fgWPathLength0) delete fgWPathLength0; | |
295 | if(fgWPathLength) delete fgWPathLength; | |
296 | if(fgWEnergyDensity) delete fgWEnergyDensity; | |
297 | if(fgWIntRadius) delete fgWIntRadius; | |
298 | if(fgWKParticipants) delete fgWKParticipants; | |
299 | if(fgWParticipants) delete fgWParticipants; | |
5b3a5a5d | 300 | } |
301 | ||
710a8d90 | 302 | void AliFastGlauber::DrawWSb() const |
5b3a5a5d | 303 | { |
65aa45f2 | 304 | // |
305 | // Draw Wood-Saxon Nuclear Density Function | |
306 | // | |
307 | TCanvas *c1 = new TCanvas("c1","Wood Saxon",400,10,600,700); | |
308 | c1->cd(); | |
309 | Double_t max=fgWSb->GetMaximum(0,fgBMax)*1.01; | |
310 | TH2F *h2f=new TH2F("h2fwsb","Wood Saxon: #rho(r) = n (1-#omega(r/r_{0})^2)/(1+exp((r-r_{0})/d)) [fm^{-3}]",2,0,fgBMax,2,0,max); | |
311 | h2f->SetStats(0); | |
312 | h2f->GetXaxis()->SetTitle("r [fm]"); | |
313 | h2f->GetYaxis()->SetNoExponent(kTRUE); | |
314 | h2f->GetYaxis()->SetTitle("#rho [fm^{-3}]"); | |
315 | h2f->Draw(); | |
316 | fgWSb->Draw("same"); | |
317 | TLegend *l1a = new TLegend(0.45,0.6,.90,0.8); | |
318 | l1a->SetFillStyle(0); | |
319 | l1a->SetBorderSize(0); | |
320 | Char_t label[100]; | |
321 | sprintf(label,"r_{0} = %.2f fm",fWSr0); | |
322 | l1a->AddEntry(fgWSb,label,""); | |
323 | sprintf(label,"d = %.2f fm",fWSd); | |
324 | l1a->AddEntry(fgWSb,label,""); | |
325 | sprintf(label,"n = %.2e fm^{-3}",fWSn); | |
326 | l1a->AddEntry(fgWSb,label,""); | |
327 | sprintf(label,"#omega = %.2f",fWSw); | |
328 | l1a->AddEntry(fgWSb,label,""); | |
329 | l1a->Draw(); | |
330 | c1->Update(); | |
5b3a5a5d | 331 | } |
332 | ||
710a8d90 | 333 | void AliFastGlauber::DrawOverlap() const |
5b3a5a5d | 334 | { |
65aa45f2 | 335 | // |
336 | // Draw Overlap Function | |
337 | // | |
338 | TCanvas *c2 = new TCanvas("c2","Overlap",400,10,600,700); | |
339 | c2->cd(); | |
340 | Double_t max=fgWStaa->GetMaximum(0,fgBMax)*1.01; | |
a42548b0 | 341 | TH2F *h2f=new TH2F("h2ftaa","Overlap function: T_{AB} [mbarn^{-1}]",2,0,fgBMax,2,0, max); |
65aa45f2 | 342 | h2f->SetStats(0); |
343 | h2f->GetXaxis()->SetTitle("b [fm]"); | |
344 | h2f->GetYaxis()->SetTitle("T_{AB} [mbarn^{-1}]"); | |
345 | h2f->Draw(); | |
346 | fgWStaa->Draw("same"); | |
5b3a5a5d | 347 | } |
348 | ||
710a8d90 | 349 | void AliFastGlauber::DrawParticipants() const |
1bc228f5 | 350 | { |
65aa45f2 | 351 | // |
352 | // Draw Number of Participants Npart | |
353 | // | |
354 | TCanvas *c3 = new TCanvas("c3","Participants",400,10,600,700); | |
355 | c3->cd(); | |
356 | Double_t max=fgWParticipants->GetMaximum(0,fgBMax)*1.01; | |
357 | TH2F *h2f=new TH2F("h2fpart","Number of Participants",2,0,fgBMax,2,0,max); | |
358 | h2f->SetStats(0); | |
359 | h2f->GetXaxis()->SetTitle("b [fm]"); | |
360 | h2f->GetYaxis()->SetTitle("N_{part}"); | |
361 | h2f->Draw(); | |
362 | fgWParticipants->Draw("same"); | |
363 | TLegend *l1a = new TLegend(0.50,0.75,.90,0.9); | |
364 | l1a->SetFillStyle(0); | |
365 | l1a->SetBorderSize(0); | |
366 | Char_t label[100]; | |
367 | sprintf(label,"#sigma^{inel.}_{NN} = %.1f mbarn",fSigmaNN); | |
368 | l1a->AddEntry(fgWParticipants,label,""); | |
369 | l1a->Draw(); | |
370 | c3->Update(); | |
1bc228f5 | 371 | } |
372 | ||
710a8d90 | 373 | void AliFastGlauber::DrawThickness() const |
5b3a5a5d | 374 | { |
65aa45f2 | 375 | // |
376 | // Draw Thickness Function | |
377 | // | |
378 | TCanvas *c4 = new TCanvas("c4","Thickness",400,10,600,700); | |
379 | c4->cd(); | |
380 | Double_t max=fgWSta->GetMaximum(0,fgBMax)*1.01; | |
381 | TH2F *h2f=new TH2F("h2fta","Thickness function: T_{A} [fm^{-2}]",2,0,fgBMax,2,0,max); | |
382 | h2f->SetStats(0); | |
383 | h2f->GetXaxis()->SetTitle("b [fm]"); | |
384 | h2f->GetYaxis()->SetTitle("T_{A} [fm^{-2}]"); | |
385 | h2f->Draw(); | |
386 | fgWSta->Draw("same"); | |
5b3a5a5d | 387 | } |
388 | ||
710a8d90 | 389 | void AliFastGlauber::DrawGeo() const |
5b3a5a5d | 390 | { |
65aa45f2 | 391 | // |
392 | // Draw Geometrical Cross-Section | |
393 | // | |
394 | TCanvas *c5 = new TCanvas("c5","Geometrical Cross-Section",400,10,600,700); | |
395 | c5->cd(); | |
396 | Double_t max=fgWSgeo->GetMaximum(0,fgBMax)*1.01; | |
397 | TH2F *h2f=new TH2F("h2fgeo","Differential Geometrical Cross-Section: d#sigma^{geo}_{AB}/db [fm]",2,0,fgBMax,2,0,max); | |
398 | h2f->SetStats(0); | |
399 | h2f->GetXaxis()->SetTitle("b [fm]"); | |
400 | h2f->GetYaxis()->SetTitle("d#sigma^{geo}_{AB}/db [fm]"); | |
401 | h2f->Draw(); | |
402 | fgWSgeo->Draw("same"); | |
403 | TLegend *l1a = new TLegend(0.10,0.8,.40,0.9); | |
404 | l1a->SetFillStyle(0); | |
405 | l1a->SetBorderSize(0); | |
406 | Char_t label[100]; | |
407 | sprintf(label,"#sigma_{NN}^{inel.} = %.1f mbarn",fSigmaNN); | |
408 | l1a->AddEntry(fgWSgeo,label,""); | |
409 | l1a->Draw(); | |
410 | c5->Update(); | |
5b3a5a5d | 411 | } |
412 | ||
710a8d90 | 413 | void AliFastGlauber::DrawBinary() const |
5b3a5a5d | 414 | { |
65aa45f2 | 415 | // |
416 | // Draw Binary Cross-Section | |
417 | // | |
418 | TCanvas *c6 = new TCanvas("c6","Binary Cross-Section",400,10,600,700); | |
419 | c6->cd(); | |
420 | Double_t max=fgWSbinary->GetMaximum(0,fgBMax)*1.01; | |
421 | TH2F *h2f=new TH2F("h2fbinary","Differential Binary Cross-Section: #sigma^{hard}_{NN} dT_{AB}/db [fm]",2,0,fgBMax,2,0,max); | |
422 | h2f->SetStats(0); | |
423 | h2f->GetXaxis()->SetTitle("b [fm]"); | |
424 | h2f->GetYaxis()->SetTitle("d#sigma^{hard}_{AB}/db [fm]"); | |
425 | h2f->Draw(); | |
426 | fgWSbinary->Draw("same"); | |
427 | TLegend *l1a = new TLegend(0.50,0.8,.90,0.9); | |
428 | l1a->SetFillStyle(0); | |
429 | l1a->SetBorderSize(0); | |
430 | Char_t label[100]; | |
431 | sprintf(label,"#sigma_{NN}^{hard} = %.1f mbarn",fSigmaHard); | |
432 | l1a->AddEntry(fgWSb,label,""); | |
433 | l1a->Draw(); | |
434 | c6->Update(); | |
5b3a5a5d | 435 | } |
436 | ||
710a8d90 | 437 | void AliFastGlauber::DrawN() const |
5b3a5a5d | 438 | { |
65aa45f2 | 439 | // |
440 | // Draw Binaries per event (Ncoll) | |
441 | // | |
442 | TCanvas *c7 = new TCanvas("c7","Binaries per event",400,10,600,700); | |
443 | c7->cd(); | |
444 | Double_t max=fgWSN->GetMaximum(0,fgBMax)*1.01; | |
445 | TH2F *h2f=new TH2F("h2fhardcols","Number of hard collisions: T_{AB} #sigma^{hard}_{NN}/#sigma_{AB}^{geo}",2,0,fgBMax,2,0,max); | |
446 | h2f->SetStats(0); | |
447 | h2f->GetXaxis()->SetTitle("b [fm]"); | |
448 | h2f->GetYaxis()->SetTitle("N_{coll}"); | |
449 | h2f->Draw(); | |
450 | fgWSN->Draw("same"); | |
451 | TLegend *l1a = new TLegend(0.50,0.75,.90,0.9); | |
452 | l1a->SetFillStyle(0); | |
453 | l1a->SetBorderSize(0); | |
454 | Char_t label[100]; | |
455 | sprintf(label,"#sigma^{hard}_{NN} = %.1f mbarn",fSigmaHard); | |
456 | l1a->AddEntry(fgWSN,label,""); | |
457 | sprintf(label,"#sigma^{inel.}_{NN} = %.1f mbarn",fSigmaNN); | |
458 | l1a->AddEntry(fgWSN,label,""); | |
459 | l1a->Draw(); | |
460 | c7->Update(); | |
5b3a5a5d | 461 | } |
462 | ||
710a8d90 | 463 | void AliFastGlauber::DrawKernel(Double_t b) const |
5b3a5a5d | 464 | { |
65aa45f2 | 465 | // |
466 | // Draw Kernel | |
467 | // | |
468 | TCanvas *c8 = new TCanvas("c8","Kernel",400,10,600,700); | |
469 | c8->cd(); | |
470 | fgWStarfi->SetParameter(0, b); | |
471 | TH2F *h2f=new TH2F("h2fkernel","Kernel of Overlap function: d^{2}T_{AB}/dr/d#phi [fm^{-3}]",2,0,fgBMax,2,0,TMath::Pi()); | |
472 | h2f->SetStats(0); | |
473 | h2f->GetXaxis()->SetTitle("r [fm]"); | |
474 | h2f->GetYaxis()->SetTitle("#phi [rad]"); | |
475 | h2f->Draw(); | |
476 | fgWStarfi->Draw("same"); | |
477 | TLegend *l1a = new TLegend(0.65,0.8,.90,0.9); | |
478 | l1a->SetFillStyle(0); | |
479 | l1a->SetBorderSize(0); | |
480 | Char_t label[100]; | |
a0e187b1 | 481 | sprintf(label,"b = %.1f fm",b); |
65aa45f2 | 482 | l1a->AddEntry(fgWStarfi,label,""); |
483 | l1a->Draw(); | |
484 | c8->Update(); | |
5b3a5a5d | 485 | } |
486 | ||
710a8d90 | 487 | void AliFastGlauber::DrawAlmond(Double_t b) const |
f3a04204 | 488 | { |
65aa45f2 | 489 | // |
490 | // Draw Interaction Almond | |
491 | // | |
492 | TCanvas *c9 = new TCanvas("c9","Almond",400,10,600,700); | |
493 | c9->cd(); | |
494 | fgWAlmond->SetParameter(0, b); | |
495 | TH2F *h2f=new TH2F("h2falmond","Interaction Almond [fm^{-4}]",2,0,fgBMax,2,0,fgBMax); | |
496 | h2f->SetStats(0); | |
497 | h2f->GetXaxis()->SetTitle("x [fm]"); | |
498 | h2f->GetYaxis()->SetTitle("y [fm]"); | |
499 | h2f->Draw(); | |
500 | fgWAlmond->Draw("same"); | |
501 | TLegend *l1a = new TLegend(0.65,0.8,.90,0.9); | |
502 | l1a->SetFillStyle(0); | |
503 | l1a->SetBorderSize(0); | |
504 | Char_t label[100]; | |
a0e187b1 | 505 | sprintf(label,"b = %.1f fm",b); |
65aa45f2 | 506 | l1a->AddEntry(fgWAlmond,label,""); |
507 | l1a->Draw(); | |
508 | c9->Update(); | |
f3a04204 | 509 | } |
510 | ||
710a8d90 | 511 | void AliFastGlauber::DrawEnergyDensity() const |
f3a04204 | 512 | { |
65aa45f2 | 513 | // |
514 | // Draw energy density | |
515 | // | |
516 | TCanvas *c10 = new TCanvas("c10","Energy Density",400, 10, 600, 700); | |
517 | c10->cd(); | |
518 | fgWEnergyDensity->SetMinimum(0.); | |
519 | Double_t max=fgWEnergyDensity->GetMaximum(0,fgWEnergyDensity->GetParameter(0))*1.01; | |
520 | TH2F *h2f=new TH2F("h2fenergydens","Energy density",2,0,fgBMax,2,0,max); | |
521 | h2f->SetStats(0); | |
522 | h2f->GetXaxis()->SetTitle("b [fm]"); | |
523 | h2f->GetYaxis()->SetTitle("fm^{-4}"); | |
524 | h2f->Draw(); | |
525 | fgWEnergyDensity->Draw("same"); | |
526 | c10->Update(); | |
f3a04204 | 527 | } |
528 | ||
710a8d90 | 529 | void AliFastGlauber::DrawPathLength0(Double_t b, Int_t iopt) const |
f3a04204 | 530 | { |
65aa45f2 | 531 | // |
532 | // Draw Path Length | |
533 | // | |
534 | TCanvas *c11 = new TCanvas("c11","Path Length",400,10,600,700); | |
535 | c11->cd(); | |
536 | fgWPathLength0->SetParameter(0, b); | |
537 | fgWPathLength0->SetParameter(1, Double_t(iopt)); | |
538 | fgWPathLength0->SetMinimum(0.); | |
539 | fgWPathLength0->SetMaximum(10.); | |
540 | TH2F *h2f=new TH2F("h2fpathlength0","Path length",2,-TMath::Pi(), TMath::Pi(),2,0,10.); | |
541 | h2f->SetStats(0); | |
542 | h2f->GetXaxis()->SetTitle("#phi [rad]"); | |
543 | h2f->GetYaxis()->SetTitle("l [fm]"); | |
544 | h2f->Draw(); | |
545 | fgWPathLength0->Draw("same"); | |
f3a04204 | 546 | } |
547 | ||
710a8d90 | 548 | void AliFastGlauber::DrawPathLength(Double_t b , Int_t ni, Int_t iopt) const |
f3a04204 | 549 | { |
65aa45f2 | 550 | // |
551 | // Draw Path Length | |
552 | // | |
553 | TCanvas *c12 = new TCanvas("c12","Path Length",400,10,600,700); | |
554 | c12->cd(); | |
555 | fgWAlmond->SetParameter(0, b); | |
556 | fgWPathLength->SetParameter(0, b); | |
557 | fgWPathLength->SetParameter(1, Double_t (ni)); | |
558 | fgWPathLength->SetParameter(2, Double_t (iopt)); | |
559 | fgWPathLength->SetMinimum(0.); | |
560 | fgWPathLength->SetMaximum(10.); | |
561 | TH2F *h2f=new TH2F("h2fpathlength","Path length",2,-TMath::Pi(), TMath::Pi(),2,0,10.); | |
562 | h2f->SetStats(0); | |
563 | h2f->GetXaxis()->SetTitle("#phi [rad]"); | |
564 | h2f->GetYaxis()->SetTitle("l [fm]"); | |
565 | h2f->Draw(); | |
566 | fgWPathLength->Draw("same"); | |
f3a04204 | 567 | } |
568 | ||
710a8d90 | 569 | void AliFastGlauber::DrawIntRadius(Double_t b) const |
2a103154 | 570 | { |
65aa45f2 | 571 | // |
572 | // Draw Interaction Radius | |
573 | // | |
574 | TCanvas *c13 = new TCanvas("c13","Interaction Radius",400,10,600,700); | |
575 | c13->cd(); | |
576 | fgWIntRadius->SetParameter(0, b); | |
577 | fgWIntRadius->SetMinimum(0); | |
578 | Double_t max=fgWIntRadius->GetMaximum(0,fgBMax)*1.01; | |
579 | TH2F *h2f=new TH2F("h2fintradius","Interaction Density",2,0.,fgBMax,2,0,max); | |
580 | h2f->SetStats(0); | |
581 | h2f->GetXaxis()->SetTitle("r [fm]"); | |
582 | h2f->GetYaxis()->SetTitle("[fm^{-3}]"); | |
583 | h2f->Draw(); | |
584 | fgWIntRadius->Draw("same"); | |
2a103154 | 585 | } |
586 | ||
5b3a5a5d | 587 | Double_t AliFastGlauber::WSb(Double_t* x, Double_t* par) |
588 | { | |
65aa45f2 | 589 | // |
590 | // Woods-Saxon Parameterisation | |
591 | // as a function of radius (xx) | |
592 | // | |
710a8d90 | 593 | const Double_t kxx = x[0]; //fm |
594 | const Double_t kr0 = par[0]; //fm | |
595 | const Double_t kd = par[1]; //fm | |
596 | const Double_t kw = par[2]; //no units | |
597 | const Double_t kn = par[3]; //fm^-3 (used to normalize integral to one) | |
598 | Double_t y = kn * (1.+kw*(kxx/kr0)*(kxx/kr0))/(1.+TMath::Exp((kxx-kr0)/kd)); | |
65aa45f2 | 599 | return y; //fm^-3 |
5b3a5a5d | 600 | } |
601 | ||
602 | Double_t AliFastGlauber::WSbz(Double_t* x, Double_t* par) | |
603 | { | |
65aa45f2 | 604 | // |
605 | // Wood Saxon Parameterisation | |
606 | // as a function of z and b | |
607 | // | |
710a8d90 | 608 | const Double_t kbb = x[0]; //fm |
609 | const Double_t kzz = x[1]; //fm | |
610 | const Double_t kr0 = par[0]; //fm | |
611 | const Double_t kd = par[1]; //fm | |
612 | const Double_t kw = par[2]; //no units | |
613 | const Double_t kn = par[3]; //fm^-3 (used to normalize integral to one) | |
614 | const Double_t kxx = TMath::Sqrt(kbb*kbb+kzz*kzz); | |
615 | Double_t y = kn * (1.+kw*(kxx/kr0)*(kxx/kr0))/(1.+TMath::Exp((kxx-kr0)/kd)); | |
65aa45f2 | 616 | return y; //fm^-3 |
5b3a5a5d | 617 | } |
618 | ||
619 | Double_t AliFastGlauber::WSz(Double_t* x, Double_t* par) | |
620 | { | |
65aa45f2 | 621 | // |
622 | // Wood Saxon Parameterisation | |
623 | // as a function of z for fixed b | |
624 | // | |
710a8d90 | 625 | const Double_t kzz = x[0]; //fm |
626 | const Double_t kr0 = par[0]; //fm | |
627 | const Double_t kd = par[1]; //fm | |
628 | const Double_t kw = par[2]; //no units | |
629 | const Double_t kn = par[3]; //fm^-3 (used to normalize integral to one) | |
630 | const Double_t kbb = par[4]; //fm | |
631 | const Double_t kxx = TMath::Sqrt(kbb*kbb+kzz*kzz); | |
632 | Double_t y = kn * (1.+kw*(kxx/kr0)*(kxx/kr0))/(1.+TMath::Exp((kxx-kr0)/kd)); | |
65aa45f2 | 633 | return y; //fm^-3 |
5b3a5a5d | 634 | } |
635 | ||
f86dad79 | 636 | Double_t AliFastGlauber::WSta(Double_t* x, Double_t* /*par*/) |
5b3a5a5d | 637 | { |
65aa45f2 | 638 | // |
639 | // Thickness function T_A | |
640 | // as a function of b | |
641 | // | |
710a8d90 | 642 | const Double_t kb = x[0]; |
643 | fgWSz->SetParameter(4, kb); | |
644 | Double_t y = 2. * fgWSz->Integral(0., fgBMax); | |
65aa45f2 | 645 | return y; //fm^-2 |
5b3a5a5d | 646 | } |
647 | ||
5b3a5a5d | 648 | Double_t AliFastGlauber::WStarfi(Double_t* x, Double_t* par) |
649 | { | |
65aa45f2 | 650 | // |
651 | // Kernel for overlap function: T_A(s)*T_A(s-b) | |
652 | // as a function of r and phi | |
710a8d90 | 653 | const Double_t kr1 = x[0]; |
654 | const Double_t kphi = x[1]; | |
655 | const Double_t kb = par[0]; | |
656 | const Double_t kr2 = TMath::Sqrt(kr1*kr1 + kb*kb - 2.*kr1*kb*TMath::Cos(kphi)); | |
657 | Double_t y = kr1 * fgWSta->Eval(kr1) * fgWSta->Eval(kr2); | |
65aa45f2 | 658 | return y; //fm^-3 |
659 | } | |
660 | ||
661 | Double_t AliFastGlauber::WStaa(Double_t* x, Double_t* par) | |
662 | { | |
663 | // | |
664 | // Overlap function | |
665 | // T_{AB}=Int d2s T_A(s)*T_B(s-b) | |
666 | // as a function of b | |
667 | // (normalized to fA*fB) | |
668 | // | |
710a8d90 | 669 | const Double_t kb = x[0]; |
670 | const Double_t ka = par[0]; | |
671 | fgWStarfi->SetParameter(0, kb); | |
65aa45f2 | 672 | |
673 | // root integration seems to fail | |
674 | /* | |
675 | Double_t al[2]; | |
676 | Double_t bl[2]; | |
677 | al[0] = 1e-6; | |
678 | al[1] = fgBMax; | |
679 | bl[0] = 0.; | |
680 | bl[1] = TMath::Pi(); | |
681 | Double_t err; | |
682 | ||
683 | Double_t y = 2. * 208. * 208. * fgWStarfi->IntegralMultiple(2, al, bl, 0.001, err); | |
684 | printf("WStaa: %.5e %.5e %.5e\n", b, y, err); | |
685 | */ | |
686 | ||
687 | // | |
688 | // MC Integration | |
689 | // | |
690 | Double_t y = 0; | |
a42548b0 | 691 | |
692 | ||
65aa45f2 | 693 | for (Int_t i = 0; i < fgkMCInts; i++) |
694 | { | |
a42548b0 | 695 | |
710a8d90 | 696 | const Double_t kphi = TMath::Pi() * gRandom->Rndm(); |
697 | const Double_t kb1 = fgBMax * gRandom->Rndm(); | |
698 | y += fgWStarfi->Eval(kb1, kphi); | |
65aa45f2 | 699 | } |
700 | y *= 2. * TMath::Pi() * fgBMax / fgkMCInts; //fm^-2 | |
710a8d90 | 701 | y *= ka * ka * 0.1; //mbarn^-1 |
65aa45f2 | 702 | return y; |
5b3a5a5d | 703 | } |
704 | ||
1bc228f5 | 705 | Double_t AliFastGlauber::WKParticipants(Double_t* x, Double_t* par) |
706 | { | |
65aa45f2 | 707 | // |
708 | // Kernel for number of participants | |
709 | // as a function of r and phi | |
710 | // | |
710a8d90 | 711 | const Double_t kr1 = x[0]; |
712 | const Double_t kphi = x[1]; | |
713 | const Double_t kb = par[0]; //fm | |
714 | const Double_t ksig = par[1]; //mbarn | |
715 | const Double_t ka = par[2]; //mass number | |
716 | const Double_t kr2 = TMath::Sqrt(kr1*kr1 +kb*kb - 2.*kr1*kb*TMath::Cos(kphi)); | |
717 | const Double_t kxsi = fgWSta->Eval(kr2) * ksig * 0.1; //no units | |
65aa45f2 | 718 | /* |
710a8d90 | 719 | Double_t y=(1-TMath::Power((1-xsi),aa)) |
65aa45f2 | 720 | */ |
710a8d90 | 721 | Double_t a = ka; |
722 | Double_t sum = ka * kxsi; | |
65aa45f2 | 723 | Double_t y = sum; |
710a8d90 | 724 | for (Int_t i = 1; i <= ka; i++) |
1bc228f5 | 725 | { |
65aa45f2 | 726 | a--; |
710a8d90 | 727 | sum *= (-kxsi) * a / Float_t(i+1); |
65aa45f2 | 728 | y += sum; |
1bc228f5 | 729 | } |
710a8d90 | 730 | y *= kr1 * fgWSta->Eval(kr1); |
65aa45f2 | 731 | return y; //fm^-1 |
1bc228f5 | 732 | } |
733 | ||
65aa45f2 | 734 | Double_t AliFastGlauber::WParticipants(Double_t* x, Double_t* par) |
735 | { | |
736 | // | |
737 | // Number of Participants as | |
738 | // a function of b | |
739 | // | |
710a8d90 | 740 | const Double_t kb = x[0]; |
741 | const Double_t ksig = par[0]; //mbarn | |
742 | const Double_t ka = par[1]; //mass number | |
743 | fgWKParticipants->SetParameter(0, kb); | |
744 | fgWKParticipants->SetParameter(1, ksig); | |
745 | fgWKParticipants->SetParameter(2, ka); | |
65aa45f2 | 746 | |
747 | // | |
748 | // MC Integration | |
749 | // | |
750 | Double_t y = 0; | |
751 | for (Int_t i = 0; i < fgkMCInts; i++) | |
752 | { | |
710a8d90 | 753 | const Double_t kphi = TMath::Pi() * gRandom->Rndm(); |
754 | const Double_t kb1 = fgBMax * gRandom->Rndm(); | |
755 | y += fgWKParticipants->Eval(kb1, kphi); | |
65aa45f2 | 756 | } |
710a8d90 | 757 | y *= 2. * ka * 2. * TMath::Pi() * fgBMax / fgkMCInts; |
65aa45f2 | 758 | return y; //no units |
759 | } | |
760 | ||
761 | Double_t AliFastGlauber::WSgeo(Double_t* x, Double_t* par) | |
762 | { | |
763 | // | |
764 | // Geometrical Cross-Section | |
765 | // as a function of b | |
766 | // | |
710a8d90 | 767 | const Double_t kb = x[0]; //fm |
768 | const Double_t ksigNN = par[0]; //mbarn | |
769 | const Double_t ktaa = fgWStaa->Eval(kb); //mbarn^-1 | |
770 | Double_t y = 2. * TMath::Pi() * kb * (1. - TMath::Exp(- ksigNN * ktaa)); | |
65aa45f2 | 771 | return y; //fm |
772 | } | |
773 | ||
774 | Double_t AliFastGlauber::WSbinary(Double_t* x, Double_t* par) | |
775 | { | |
776 | // | |
710a8d90 | 777 | // Number of binary hard collisions |
65aa45f2 | 778 | // as a function of b |
779 | // | |
710a8d90 | 780 | const Double_t kb = x[0]; //fm |
781 | const Double_t ksig = par[0]; //mbarn | |
782 | const Double_t ktaa = fgWStaa->Eval(kb); //mbarn^-1 | |
783 | Double_t y = 2. * TMath::Pi() * kb * ksig * ktaa; | |
65aa45f2 | 784 | return y; //fm |
785 | } | |
786 | ||
787 | Double_t AliFastGlauber::WSN(Double_t* x, Double_t* /*par*/) | |
788 | { | |
789 | // | |
790 | // Number of hard processes per event | |
791 | // as a function of b | |
710a8d90 | 792 | const Double_t kb = x[0]; |
793 | Double_t y = fgWSbinary->Eval(kb)/fgWSgeo->Eval(kb); | |
65aa45f2 | 794 | return y; //no units |
795 | } | |
796 | ||
797 | Double_t AliFastGlauber::WEnergyDensity(Double_t* x, Double_t* par) | |
798 | { | |
799 | // | |
800 | // Initial energy density | |
801 | // as a function of the impact parameter | |
802 | // | |
710a8d90 | 803 | const Double_t kb = x[0]; |
804 | const Double_t krA = par[0]; | |
65aa45f2 | 805 | // |
806 | // Attention: area of transverse reaction zone in hard-sphere approximation ! | |
710a8d90 | 807 | const Double_t krA2=krA*krA; |
808 | const Double_t kb2=kb*kb; | |
809 | const Double_t ksaa = (TMath::Pi() - 2. * TMath::ASin(kb/ 2./ krA)) * krA2 | |
810 | - kb * TMath::Sqrt(krA2 - kb2/ 4.); //fm^2 | |
811 | const Double_t ktaa = fgWStaa->Eval(kb); //mbarn^-1 | |
812 | Double_t y=ktaa/ksaa*10; | |
65aa45f2 | 813 | return y; //fm^-4 |
814 | } | |
5b3a5a5d | 815 | |
f3a04204 | 816 | Double_t AliFastGlauber::WAlmond(Double_t* x, Double_t* par) |
817 | { | |
65aa45f2 | 818 | // |
819 | // Almond shaped interaction region | |
820 | // as a function of cartesian x,y. | |
821 | // | |
710a8d90 | 822 | const Double_t kb = par[0]; |
823 | const Double_t kxx = x[0] + kb/2.; | |
824 | const Double_t kyy = x[1]; | |
825 | const Double_t kr1 = TMath::Sqrt(kxx*kxx + kyy*kyy); | |
826 | const Double_t kphi = TMath::ATan2(kyy,kxx); | |
827 | const Double_t kr2 = TMath::Sqrt(kr1*kr1 + kb*kb - 2.*kr1*kb*TMath::Cos(kphi)); | |
65aa45f2 | 828 | // |
829 | // Interaction probability calculated as product of thicknesses | |
830 | // | |
710a8d90 | 831 | Double_t y = fgWSta->Eval(kr1) * fgWSta->Eval(kr2); |
65aa45f2 | 832 | return y; //fm^-4 |
f3a04204 | 833 | } |
834 | ||
835 | Double_t AliFastGlauber::WIntRadius(Double_t* x, Double_t* par) | |
836 | { | |
65aa45f2 | 837 | // |
838 | // Average interaction density over radius | |
839 | // at which interaction takes place | |
840 | // as a function of radius | |
841 | // | |
710a8d90 | 842 | const Double_t kr = x[0]; |
843 | const Double_t kb = par[0]; | |
844 | fgWAlmond->SetParameter(0, kb); | |
65aa45f2 | 845 | // Average over phi in small steps |
710a8d90 | 846 | const Double_t kdphi = 2. * TMath::Pi() / 100.; |
65aa45f2 | 847 | Double_t phi = 0.; |
848 | Double_t y = 0.; | |
849 | for (Int_t i = 0; i < 100; i++) { | |
710a8d90 | 850 | const Double_t kxx = kr * TMath::Cos(phi); |
851 | const Double_t kyy = kr * TMath::Sin(phi); | |
852 | y += fgWAlmond->Eval(kxx,kyy); | |
853 | phi += kdphi; | |
65aa45f2 | 854 | } // phi loop |
855 | // Result multiplied by Jacobian (2 pi r) | |
710a8d90 | 856 | y *= 2. * TMath::Pi() * kr / 100.; |
65aa45f2 | 857 | return y; //fm^-3 |
f3a04204 | 858 | } |
859 | ||
860 | Double_t AliFastGlauber::WPathLength0(Double_t* x, Double_t* par) | |
861 | { | |
65aa45f2 | 862 | // |
863 | // Path Length as a function of phi | |
864 | // for interaction point fixed at (0,0) | |
865 | // as a function of phi-direction | |
866 | // | |
867 | // Phi direction in Almond | |
710a8d90 | 868 | const Double_t kphi0 = x[0]; |
869 | const Double_t kb = par[0]; | |
65aa45f2 | 870 | // Path Length definition |
710a8d90 | 871 | const Int_t kiopt = Int_t(par[1]); |
65aa45f2 | 872 | |
873 | // Step along radial direction phi | |
874 | const Int_t kNp = 100; // Steps in r | |
875 | const Double_t kDr = fgBMax/kNp; | |
876 | Double_t r = 0.; | |
877 | Double_t rw = 0.; | |
878 | Double_t w = 0.; | |
879 | for (Int_t i = 0; i < kNp; i++) { | |
880 | // | |
881 | // Transform into target frame | |
882 | // | |
710a8d90 | 883 | const Double_t kxx = r * TMath::Cos(kphi0) + kb / 2.; |
884 | const Double_t kyy = r * TMath::Sin(kphi0); | |
885 | const Double_t kphi = TMath::ATan2(kyy, kxx); | |
886 | const Double_t kr1 = TMath::Sqrt(kxx*kxx + kyy*kyy); | |
65aa45f2 | 887 | // Radius in projectile frame |
710a8d90 | 888 | const Double_t kr2 = TMath::Sqrt(kr1*kr1 + kb*kb - 2.*kr1*kb*TMath::Cos(kphi)); |
889 | const Double_t ky = fgWSta->Eval(kr1) * fgWSta->Eval(kr2); | |
65aa45f2 | 890 | |
710a8d90 | 891 | rw += ky * r; |
892 | w += ky; | |
65aa45f2 | 893 | r += kDr; |
894 | } // radial steps | |
895 | ||
896 | Double_t y=0.; | |
710a8d90 | 897 | if (!kiopt) // My length definition (is exact for hard disk) |
65aa45f2 | 898 | if(w) y= 2. * rw / w; |
899 | else { | |
710a8d90 | 900 | const Double_t knorm=fgWSta->Eval(1e-4); |
901 | if(knorm) y = TMath::Sqrt(2. * rw * kDr / knorm / knorm); | |
65aa45f2 | 902 | } |
903 | return y; //fm | |
904 | } | |
905 | ||
906 | Double_t AliFastGlauber::WPathLength(Double_t* x, Double_t* par) | |
907 | { | |
908 | // | |
909 | // Path Length as a function of phi | |
910 | // Interaction point from random distribution | |
911 | // as a function of the phi-direction | |
710a8d90 | 912 | const Double_t kphi0 = x[0]; |
913 | const Double_t kb = par[0]; | |
914 | fgWAlmond->SetParameter(0, kb); | |
915 | const Int_t kNpi = Int_t (par[1]); //Number of interactions | |
916 | const Int_t kiopt = Int_t(par[2]); //Path Length definition | |
65aa45f2 | 917 | |
918 | // | |
919 | // r-steps | |
920 | // | |
921 | const Int_t kNp = 100; | |
922 | const Double_t kDr = fgBMax/Double_t(kNp); | |
923 | Double_t l = 0.; // Path length | |
924 | for (Int_t in = 0; in < kNpi; in ++) { | |
f3a04204 | 925 | Double_t rw = 0.; |
926 | Double_t w = 0.; | |
65aa45f2 | 927 | // Interaction point |
928 | Double_t x0, y0; | |
929 | fgWAlmond->GetRandom2(x0, y0); | |
930 | // Initial radius | |
710a8d90 | 931 | const Double_t kr0 = TMath::Sqrt(x0*x0 + y0*y0); |
932 | const Int_t knps = Int_t ((fgBMax - kr0)/kDr) - 1; | |
f3a04204 | 933 | |
65aa45f2 | 934 | // Radial steps |
935 | Double_t r = 0.; | |
710a8d90 | 936 | for (Int_t i = 0; (i < knps ); i++) { |
65aa45f2 | 937 | // Transform into target frame |
710a8d90 | 938 | const Double_t kxx = x0 + r * TMath::Cos(kphi0) + kb / 2.; |
939 | const Double_t kyy = y0 + r * TMath::Sin(kphi0); | |
940 | const Double_t kphi = TMath::ATan2(kyy, kxx); | |
941 | const Double_t kr1 = TMath::Sqrt(kxx*kxx + kyy*kyy); | |
65aa45f2 | 942 | // Radius in projectile frame |
710a8d90 | 943 | const Double_t kr2 = TMath::Sqrt(kr1*kr1 + kb*kb - 2.*kr1*kb*TMath::Cos(kphi)); |
944 | const Double_t ky = fgWSta->Eval(kr1) * fgWSta->Eval(kr2); | |
65aa45f2 | 945 | |
710a8d90 | 946 | rw += ky * r; |
947 | w += ky; | |
65aa45f2 | 948 | r += kDr; |
949 | } // steps | |
950 | // Average over interactions | |
710a8d90 | 951 | if (!kiopt) { |
65aa45f2 | 952 | if(w) l += (2. * rw / w); |
8de7e046 | 953 | } else { |
710a8d90 | 954 | const Double_t knorm=fgWSta->Eval(1e-4); |
955 | if(knorm) l+= 2. * rw * kDr / knorm / knorm; | |
8de7e046 | 956 | } |
65aa45f2 | 957 | } // interactions |
958 | Double_t ret=0; | |
710a8d90 | 959 | if (!kiopt) |
65aa45f2 | 960 | ret= l / kNpi; |
961 | else | |
962 | ret=TMath::Sqrt( l / kNpi); | |
963 | return ret; //fm | |
f3a04204 | 964 | } |
965 | ||
710a8d90 | 966 | Double_t AliFastGlauber::CrossSection(Double_t b1, Double_t b2) const |
f3a04204 | 967 | { |
65aa45f2 | 968 | // |
969 | // Return the geometrical cross-section integrated from b1 to b2 | |
970 | // | |
971 | return fgWSgeo->Integral(b1, b2)*10.; //mbarn | |
972 | } | |
f3a04204 | 973 | |
710a8d90 | 974 | Double_t AliFastGlauber::HardCrossSection(Double_t b1, Double_t b2) const |
5b3a5a5d | 975 | { |
65aa45f2 | 976 | // |
977 | // Return the hard cross-section integrated from b1 to b2 | |
978 | // | |
979 | return fgWSbinary->Integral(b1, b2)*10.; //mbarn | |
5b3a5a5d | 980 | } |
981 | ||
710a8d90 | 982 | Double_t AliFastGlauber::FractionOfHardCrossSection(Double_t b1, Double_t b2) const |
1bc228f5 | 983 | { |
65aa45f2 | 984 | // |
148c5ce5 | 985 | // Return fraction of hard cross-section integrated from b1 to b2 |
65aa45f2 | 986 | // |
987 | return fgWSbinary->Integral(b1, b2)/fgWSbinary->Integral(0., 100.); | |
1bc228f5 | 988 | } |
989 | ||
f762082f | 990 | Double_t AliFastGlauber::NHard(Double_t b1, Double_t b2) const |
991 | { | |
992 | // | |
993 | // Number of binary hard collisions | |
994 | // as a function of b (nucl/ex/0302016 eq. 19) | |
995 | // | |
996 | const Double_t kshard=HardCrossSection(b1,b2); | |
997 | const Double_t ksgeo=CrossSection(b1,b2); | |
998 | if(ksgeo>0) | |
999 | return kshard/ksgeo; | |
1000 | else return -1; | |
1001 | } | |
1002 | ||
710a8d90 | 1003 | Double_t AliFastGlauber::Binaries(Double_t b) const |
5b3a5a5d | 1004 | { |
65aa45f2 | 1005 | // |
710a8d90 | 1006 | // Return number of binary hard collisions normalized to 1 at b=0 |
65aa45f2 | 1007 | // |
1008 | if(b==0) b=1e-4; | |
1009 | return fgWSN->Eval(b)/fgWSN->Eval(1e-4); | |
5b3a5a5d | 1010 | } |
1011 | ||
a42548b0 | 1012 | Double_t AliFastGlauber::MeanOverlap(Double_t b1, Double_t b2) |
1013 | { | |
1014 | // | |
1015 | // Calculate the mean overlap for impact parameter range b1 .. b2 | |
1016 | // | |
1017 | Double_t sum = 0.; | |
1018 | Double_t sumc = 0.; | |
1019 | Double_t b = b1; | |
1020 | ||
1021 | while (b < b2-0.005) { | |
1022 | Double_t nc = GetNumberOfCollisions(b); | |
1023 | sum += 10. * fgWStaa->Eval(b) * fgWSgeo->Eval(b) * 0.01 / (1. - TMath::Exp(-nc)); | |
1024 | sumc += 10. * fgWSgeo->Eval(b) * 0.01; | |
1025 | b += 0.01; | |
1026 | } | |
1027 | return (sum / CrossSection(b1, b2)); | |
1028 | } | |
1029 | ||
1030 | ||
1031 | Double_t AliFastGlauber::MeanNumberOfCollisionsPerEvent(Double_t b1, Double_t b2) | |
1032 | { | |
1033 | // | |
1034 | // Calculate the mean number of collisions per event for impact parameter range b1 .. b2 | |
1035 | // | |
1036 | Double_t sum = 0.; | |
1037 | Double_t sumc = 0.; | |
1038 | Double_t b = b1; | |
1039 | ||
1040 | while (b < b2-0.005) { | |
1041 | Double_t nc = GetNumberOfCollisions(b); | |
1042 | sum += nc / (1. - TMath::Exp(-nc)) * 10. * fgWSgeo->Eval(b) * 0.01; | |
1043 | sumc += 10. * fgWSgeo->Eval(b) * 0.01; | |
1044 | b += 0.01; | |
1045 | } | |
1046 | return (sum / CrossSection(b1, b2)); | |
1047 | } | |
1048 | ||
1049 | ||
710a8d90 | 1050 | Double_t AliFastGlauber::GetNumberOfBinaries(Double_t b) const |
5b3a5a5d | 1051 | { |
65aa45f2 | 1052 | // |
710a8d90 | 1053 | // Return number of binary hard collisions at b |
65aa45f2 | 1054 | // |
1055 | if(b==0) b=1e-4; | |
1056 | return fgWSN->Eval(b); | |
5b3a5a5d | 1057 | } |
1058 | ||
710a8d90 | 1059 | Double_t AliFastGlauber::Participants(Double_t b) const |
5b3a5a5d | 1060 | { |
65aa45f2 | 1061 | // |
1062 | // Return the number of participants normalized to 1 at b=0 | |
1063 | // | |
1064 | if(b==0) b=1e-4; | |
1065 | return (fgWParticipants->Eval(b)/fgWParticipants->Eval(1e-4)); | |
5b3a5a5d | 1066 | } |
1067 | ||
710a8d90 | 1068 | Double_t AliFastGlauber::GetNumberOfParticipants(Double_t b) const |
2a103154 | 1069 | { |
65aa45f2 | 1070 | // |
1071 | // Return the number of participants for impact parameter b | |
1072 | // | |
1073 | if(b==0) b=1e-4; | |
1074 | return (fgWParticipants->Eval(b)); | |
2a103154 | 1075 | } |
1076 | ||
710a8d90 | 1077 | Double_t AliFastGlauber::GetNumberOfCollisions(Double_t b) const |
1078 | { | |
1079 | // | |
1080 | // Return the number of collisions for impact parameter b | |
1081 | // | |
1082 | if(b==0) b=1e-4; | |
1083 | return (fgWStaa->Eval(b)*fSigmaNN); | |
1084 | } | |
1085 | ||
148c5ce5 | 1086 | Double_t AliFastGlauber::GetNumberOfCollisionsPerEvent(Double_t b) const |
1087 | { | |
1088 | // | |
1089 | // Return the number of collisions per event (at least one collision) | |
1090 | // for impact parameter b | |
1091 | // | |
1092 | Double_t n = GetNumberOfCollisions(b); | |
1093 | if (n > 0.) { | |
1094 | return (n / (1. - TMath::Exp(- n))); | |
1095 | } else { | |
1096 | return (0.); | |
1097 | } | |
1098 | } | |
1099 | ||
5b3a5a5d | 1100 | void AliFastGlauber::SimulateTrigger(Int_t n) |
1101 | { | |
65aa45f2 | 1102 | // |
1103 | // Simulates Trigger | |
1104 | // | |
1105 | TH1F* mbtH = new TH1F("mbtH", "MB Trigger b-Distribution", 100, 0., 20.); | |
1106 | TH1F* hdtH = new TH1F("hdtH", "Hard Trigger b-Distribution", 100, 0., 20.); | |
1107 | TH1F* mbmH = new TH1F("mbmH", "MB Trigger Multiplicity Distribution", 100, 0., 8000.); | |
1108 | TH1F* hdmH = new TH1F("hdmH", "Hard Trigger Multiplicity Distribution", 100, 0., 8000.); | |
5b3a5a5d | 1109 | |
65aa45f2 | 1110 | mbtH->SetXTitle("b [fm]"); |
1111 | hdtH->SetXTitle("b [fm]"); | |
1112 | mbmH->SetXTitle("Multiplicity"); | |
1113 | hdmH->SetXTitle("Multiplicity"); | |
5b3a5a5d | 1114 | |
65aa45f2 | 1115 | TCanvas *c0 = new TCanvas("c0","Trigger Simulation",400,10,600,700); |
1116 | c0->Divide(2,1); | |
1117 | TCanvas *c1 = new TCanvas("c1","Trigger Simulation",400,10,600,700); | |
1118 | c1->Divide(1,2); | |
5b3a5a5d | 1119 | |
65aa45f2 | 1120 | // |
1121 | // | |
1122 | Init(1); | |
1123 | for (Int_t iev = 0; iev < n; iev++) | |
5b3a5a5d | 1124 | { |
65aa45f2 | 1125 | Float_t b, p, mult; |
1126 | GetRandom(b, p, mult); | |
1127 | mbtH->Fill(b,1.); | |
1128 | hdtH->Fill(b, p); | |
1129 | mbmH->Fill(mult, 1.); | |
1130 | hdmH->Fill(mult, p); | |
1131 | ||
1132 | c0->cd(1); | |
1133 | mbtH->Draw(); | |
1134 | c0->cd(2); | |
1135 | hdtH->Draw(); | |
1136 | c0->Update(); | |
1137 | ||
1138 | c1->cd(1); | |
1139 | mbmH->Draw(); | |
1140 | c1->cd(2); | |
1141 | hdmH->Draw(); | |
1142 | c1->Update(); | |
5b3a5a5d | 1143 | } |
1144 | } | |
1145 | ||
1146 | void AliFastGlauber::GetRandom(Float_t& b, Float_t& p, Float_t& mult) | |
1147 | { | |
65aa45f2 | 1148 | // |
1149 | // Gives back a random impact parameter, hard trigger probability and multiplicity | |
1150 | // | |
1151 | b = fgWSgeo->GetRandom(); | |
710a8d90 | 1152 | const Float_t kmu = fgWSN->Eval(b); |
1153 | p = 1.-TMath::Exp(-kmu); | |
1154 | mult = 6000./fgWSN->Eval(1.) * kmu; | |
5b3a5a5d | 1155 | } |
1156 | ||
c2140715 | 1157 | void AliFastGlauber::GetRandom(Int_t& bin, Bool_t& hard) |
1158 | { | |
65aa45f2 | 1159 | // |
1160 | // Gives back a random impact parameter bin, and hard trigger decission | |
1161 | // | |
710a8d90 | 1162 | const Float_t kb = fgWSgeo->GetRandom(); |
1163 | const Float_t kmu = fgWSN->Eval(kb) * fSigmaHard; | |
1164 | const Float_t kp = 1.-TMath::Exp(-kmu); | |
1165 | if (kb < 5.) { | |
65aa45f2 | 1166 | bin = 1; |
710a8d90 | 1167 | } else if (kb < 8.6) { |
65aa45f2 | 1168 | bin = 2; |
710a8d90 | 1169 | } else if (kb < 11.2) { |
65aa45f2 | 1170 | bin = 3; |
710a8d90 | 1171 | } else if (kb < 13.2) { |
65aa45f2 | 1172 | bin = 4; |
710a8d90 | 1173 | } else if (kb < 15.0) { |
65aa45f2 | 1174 | bin = 5; |
1175 | } else { | |
1176 | bin = 6; | |
1177 | } | |
1178 | hard = kFALSE; | |
710a8d90 | 1179 | const Float_t kr = gRandom->Rndm(); |
1180 | if (kr < kp) hard = kTRUE; | |
c2140715 | 1181 | } |
1182 | ||
65aa45f2 | 1183 | Double_t AliFastGlauber::GetRandomImpactParameter(Double_t bmin, Double_t bmax) |
5b3a5a5d | 1184 | { |
65aa45f2 | 1185 | // |
1186 | // Gives back a random impact parameter in the range bmin .. bmax | |
1187 | // | |
1188 | Float_t b = -1.; | |
1189 | while(b < bmin || b > bmax) | |
1190 | b = fgWSgeo->GetRandom(); | |
1191 | return b; | |
5b3a5a5d | 1192 | } |
1193 | ||
710a8d90 | 1194 | void AliFastGlauber::StoreFunctions() const |
5b3a5a5d | 1195 | { |
65aa45f2 | 1196 | // |
1197 | // Store in file functions | |
1198 | // | |
1199 | TFile* ff = new TFile(fName.Data(),"recreate"); | |
1200 | fgWStaa->Write("WStaa"); | |
1201 | fgWParticipants->Write("WParticipants"); | |
1202 | ff->Close(); | |
1203 | return; | |
5b3a5a5d | 1204 | } |
1205 | ||
65aa45f2 | 1206 | //=================== Added by A. Dainese 11/02/04 =========================== |
1bc228f5 | 1207 | |
710a8d90 | 1208 | void AliFastGlauber::StoreAlmonds() const |
5b3a5a5d | 1209 | { |
65aa45f2 | 1210 | // |
1211 | // Store in file | |
1212 | // 40 almonds for b = (0.25+k*0.5) fm (k=0->39) | |
1213 | // | |
1214 | Char_t almondName[100]; | |
1215 | TFile* ff = new TFile(fName.Data(),"update"); | |
1216 | for(Int_t k=0; k<40; k++) { | |
1217 | sprintf(almondName,"WAlmondFixedB%d",k); | |
1218 | Double_t b = 0.25+k*0.5; | |
1219 | Info("StoreAlmonds"," b = %f\n",b); | |
1220 | fgWAlmond->SetParameter(0,b); | |
1221 | fgWAlmond->Write(almondName); | |
1222 | } | |
1223 | ff->Close(); | |
1224 | return; | |
5b3a5a5d | 1225 | } |
a2f2f511 | 1226 | |
a2f2f511 | 1227 | void AliFastGlauber::SetCentralityClass(Double_t xsecFrLow,Double_t xsecFrUp) |
1228 | { | |
1229 | // | |
65aa45f2 | 1230 | // Set limits of centrality class as fractions |
1231 | // of the geomtrical cross section | |
a2f2f511 | 1232 | // |
1233 | if(xsecFrLow>1. || xsecFrUp>1. || xsecFrLow>xsecFrUp) { | |
65aa45f2 | 1234 | Error("SetCentralityClass", "Please set 0 <= xsecFrLow <= xsecFrUp <= 1\n"); |
a2f2f511 | 1235 | return; |
1236 | } | |
1237 | ||
1238 | Double_t bLow=0.,bUp=0.; | |
1239 | Double_t xsecFr=0.; | |
710a8d90 | 1240 | const Double_t knorm=fgWSgeo->Integral(0.,100.); |
a2f2f511 | 1241 | while(xsecFr<xsecFrLow) { |
710a8d90 | 1242 | xsecFr = fgWSgeo->Integral(0.,bLow)/knorm; |
a2f2f511 | 1243 | bLow += 0.1; |
1244 | } | |
1245 | bUp = bLow; | |
1246 | while(xsecFr<xsecFrUp) { | |
710a8d90 | 1247 | xsecFr = fgWSgeo->Integral(0.,bUp)/knorm; |
a2f2f511 | 1248 | bUp += 0.1; |
1249 | } | |
1250 | ||
710a8d90 | 1251 | Info("SetCentralityClass", "Centrality class: %4.2f-%4.2f; %4.1f < b < %4.1f fm", |
a2f2f511 | 1252 | xsecFrLow,xsecFrUp,bLow,bUp); |
a2f2f511 | 1253 | fgWSbinary->SetRange(bLow,bUp); |
710a8d90 | 1254 | fBmin=bLow; |
1255 | fBmax=bUp; | |
a2f2f511 | 1256 | return; |
1257 | } | |
1258 | ||
1259 | void AliFastGlauber::GetRandomBHard(Double_t& b) | |
1260 | { | |
1261 | // | |
1262 | // Get random impact parameter according to distribution of | |
1263 | // hard (binary) cross-section, in the range defined by the centrality class | |
1264 | // | |
1265 | b = fgWSbinary->GetRandom(); | |
1266 | Int_t bin = 2*(Int_t)b; | |
1267 | if( (b-(Int_t)b) > 0.5) bin++; | |
7f2f270b | 1268 | fgWAlmondCurrent = fgWAlmondFixedB[bin]; |
a2f2f511 | 1269 | return; |
1270 | } | |
1271 | ||
1272 | void AliFastGlauber::GetRandomXY(Double_t& x,Double_t& y) | |
1273 | { | |
1274 | // | |
1275 | // Get random position of parton production point according to | |
1276 | // product of thickness functions | |
1277 | // | |
65aa45f2 | 1278 | fgWAlmondCurrent->GetRandom2(x,y); |
a2f2f511 | 1279 | return; |
1280 | } | |
1281 | ||
1282 | void AliFastGlauber::GetRandomPhi(Double_t& phi) | |
1283 | { | |
1284 | // | |
1285 | // Get random parton azimuthal propagation direction | |
1286 | // | |
1287 | phi = 2.*TMath::Pi()*gRandom->Rndm(); | |
1288 | return; | |
1289 | } | |
1290 | ||
65aa45f2 | 1291 | Double_t AliFastGlauber::CalculateLength(Double_t b,Double_t x0,Double_t y0,Double_t phi0) |
a2f2f511 | 1292 | { |
1293 | // | |
1294 | // Calculate path length for a parton with production point (x0,y0) | |
1295 | // and propagation direction (ux=cos(phi0),uy=sin(phi0)) | |
1296 | // in a collision with impact parameter b | |
1297 | // | |
1298 | ||
1299 | // number of steps in l | |
1300 | const Int_t kNp = 100; | |
1301 | const Double_t kDl = fgBMax/Double_t(kNp); | |
1302 | ||
a2f2f511 | 1303 | if(fEllDef==1) { |
1304 | // | |
1305 | // Definition 1: | |
1306 | // | |
65aa45f2 | 1307 | // ell = 2 * \int_0^\infty dl*l*(T_A*T_B)(x0+l*ux,y0+l*uy) / |
1308 | // \int_0^\infty dl*(T_A*T_B)(x0+l*ux,y0+l*uy) | |
a2f2f511 | 1309 | // |
a2f2f511 | 1310 | |
a2f2f511 | 1311 | // Initial radius |
710a8d90 | 1312 | const Double_t kr0 = TMath::Sqrt(x0*x0 + y0*y0); |
1313 | const Int_t knps = Int_t ((fgBMax - kr0)/kDl) - 1; | |
65aa45f2 | 1314 | Double_t l = 0.; |
1315 | Double_t integral1 = 0.; | |
1316 | Double_t integral2 = 0.; | |
a2f2f511 | 1317 | // Radial steps |
710a8d90 | 1318 | for (Int_t i = 0; i < knps; i++) { |
a2f2f511 | 1319 | |
1320 | // Transform into target frame | |
710a8d90 | 1321 | const Double_t kxx = x0 + l * TMath::Cos(phi0) + b / 2.; |
1322 | const Double_t kyy = y0 + l * TMath::Sin(phi0); | |
1323 | const Double_t kphi = TMath::ATan2(kyy, kxx); | |
1324 | const Double_t kr1 = TMath::Sqrt(kxx*kxx + kyy*kyy); | |
a2f2f511 | 1325 | // Radius in projectile frame |
710a8d90 | 1326 | const Double_t kr2 = TMath::Sqrt(kr1*kr1 + b*b - 2.*kr1*b*TMath::Cos(kphi)); |
1327 | const Double_t kprodTATB = fgWSta->Eval(kr1) * fgWSta->Eval(kr2); | |
a2f2f511 | 1328 | |
710a8d90 | 1329 | integral1 += kprodTATB * l * kDl; |
1330 | integral2 += kprodTATB * kDl; | |
a2f2f511 | 1331 | l += kDl; |
1332 | } // steps | |
1333 | ||
65aa45f2 | 1334 | Double_t ell=0.; |
1335 | if(integral2) | |
1336 | ell = (2. * integral1 / integral2); | |
a2f2f511 | 1337 | return ell; |
a2f2f511 | 1338 | } else if(fEllDef==2) { |
1339 | // | |
1340 | // Definition 2: | |
1341 | // | |
1342 | // ell = \int_0^\infty dl* | |
65aa45f2 | 1343 | // \Theta((T_A*T_B)(x0+l*ux,y0+l*uy)-0.5*(T_A*T_B)(0,0)) |
a2f2f511 | 1344 | // |
1345 | ||
a2f2f511 | 1346 | // Initial radius |
710a8d90 | 1347 | const Double_t kr0 = TMath::Sqrt(x0*x0 + y0*y0); |
1348 | const Int_t knps = Int_t ((fgBMax - kr0)/kDl) - 1; | |
1349 | const Double_t kprodTATBHalfMax = 0.5*fgWAlmondCurrent->Eval(0.,0.); | |
a2f2f511 | 1350 | // Radial steps |
65aa45f2 | 1351 | Double_t l = 0.; |
1352 | Double_t integral = 0.; | |
710a8d90 | 1353 | for (Int_t i = 0; i < knps; i++) { |
a2f2f511 | 1354 | // Transform into target frame |
710a8d90 | 1355 | const Double_t kxx = x0 + l * TMath::Cos(phi0) + b / 2.; |
1356 | const Double_t kyy = y0 + l * TMath::Sin(phi0); | |
1357 | const Double_t kphi = TMath::ATan2(kyy, kxx); | |
1358 | const Double_t kr1 = TMath::Sqrt(kxx*kxx + kyy*kyy); | |
a2f2f511 | 1359 | // Radius in projectile frame |
710a8d90 | 1360 | const Double_t kr2 = TMath::Sqrt(kr1*kr1 + b*b - 2.*kr1*b*TMath::Cos(kphi)); |
1361 | const Double_t kprodTATB = fgWSta->Eval(kr1) * fgWSta->Eval(kr2); | |
1362 | if(kprodTATB>kprodTATBHalfMax) integral += kDl; | |
a2f2f511 | 1363 | l += kDl; |
1364 | } // steps | |
65aa45f2 | 1365 | Double_t ell = integral; |
a2f2f511 | 1366 | return ell; |
a2f2f511 | 1367 | } else { |
65aa45f2 | 1368 | Error("CalculateLength","Wrong length definition setting: %d !\n",fEllDef); |
a2f2f511 | 1369 | return -1.; |
1370 | } | |
1371 | } | |
1372 | ||
83f67d08 | 1373 | void AliFastGlauber::GetLengthAndPhi(Double_t& ell,Double_t& phi,Double_t b) |
a2f2f511 | 1374 | { |
1375 | // | |
1376 | // Return length from random b, x0, y0, phi0 | |
83f67d08 | 1377 | // Return also phi0 |
a2f2f511 | 1378 | // |
1379 | Double_t x0,y0,phi0; | |
1380 | if(b<0.) GetRandomBHard(b); | |
1381 | GetRandomXY(x0,y0); | |
1382 | GetRandomPhi(phi0); | |
83f67d08 | 1383 | phi = phi0; |
a2f2f511 | 1384 | ell = CalculateLength(b,x0,y0,phi0); |
a2f2f511 | 1385 | return; |
1386 | } | |
1387 | ||
83f67d08 | 1388 | void AliFastGlauber::GetLength(Double_t& ell,Double_t b) |
a2f2f511 | 1389 | { |
1390 | // | |
83f67d08 | 1391 | // Return length from random b, x0, y0, phi0 |
a2f2f511 | 1392 | // |
83f67d08 | 1393 | Double_t phi; |
1394 | GetLengthAndPhi(ell,phi,b); | |
1395 | return; | |
1396 | } | |
1397 | ||
1398 | void AliFastGlauber::GetLengthsBackToBackAndPhi(Double_t& ell1,Double_t& ell2,Double_t &phi,Double_t b) | |
1399 | { | |
1400 | // | |
1401 | // Return 2 lengths back to back from random b, x0, y0, phi0 | |
1402 | // Return also phi0 | |
1403 | // | |
a2f2f511 | 1404 | Double_t x0,y0,phi0; |
1405 | if(b<0.) GetRandomBHard(b); | |
1406 | GetRandomXY(x0,y0); | |
1407 | GetRandomPhi(phi0); | |
710a8d90 | 1408 | const Double_t kphi0plusPi = phi0+TMath::Pi(); |
83f67d08 | 1409 | phi = phi0; |
a2f2f511 | 1410 | ell1 = CalculateLength(b,x0,y0,phi0); |
710a8d90 | 1411 | ell2 = CalculateLength(b,x0,y0,kphi0plusPi); |
a2f2f511 | 1412 | return; |
1413 | } | |
1414 | ||
83f67d08 | 1415 | void AliFastGlauber::GetLengthsBackToBack(Double_t& ell1,Double_t& ell2, |
1416 | Double_t b) | |
1417 | { | |
1418 | // | |
1419 | // Return 2 lengths back to back from random b, x0, y0, phi0 | |
1420 | // | |
1421 | Double_t phi; | |
1422 | GetLengthsBackToBackAndPhi(ell1,ell2,phi,b); | |
1423 | return; | |
1424 | } | |
1425 | ||
1bc228f5 | 1426 | void AliFastGlauber::GetLengthsForPythia(Int_t n,Double_t* phi,Double_t* ell, Double_t b) |
a2f2f511 | 1427 | { |
1428 | // | |
1429 | // Returns lenghts for n partons with azimuthal angles phi[n] | |
1430 | // from random b, x0, y0 | |
1431 | // | |
1bc228f5 | 1432 | Double_t x0, y0; |
1433 | if(b < 0.) GetRandomBHard(b); | |
a2f2f511 | 1434 | GetRandomXY(x0,y0); |
1bc228f5 | 1435 | for(Int_t i = 0; i< n; i++) ell[i] = CalculateLength(b,x0,y0,phi[i]); |
a2f2f511 | 1436 | return; |
1437 | } | |
1438 | ||
1439 | void AliFastGlauber::PlotBDistr(Int_t n) | |
65aa45f2 | 1440 | { |
a2f2f511 | 1441 | // |
1442 | // Plot distribution of n impact parameters | |
1443 | // | |
1444 | Double_t b; | |
1445 | TH1F *hB = new TH1F("hB","dN/db",100,0,fgBMax); | |
1446 | hB->SetXTitle("b [fm]"); | |
1447 | hB->SetYTitle("dN/db [a.u.]"); | |
1448 | hB->SetFillColor(3); | |
a2f2f511 | 1449 | for(Int_t i=0; i<n; i++) { |
1450 | GetRandomBHard(b); | |
1451 | hB->Fill(b); | |
1452 | } | |
a2f2f511 | 1453 | TCanvas *cB = new TCanvas("cB","Impact parameter distribution",0,0,500,500); |
1454 | cB->cd(); | |
1455 | hB->Draw(); | |
a2f2f511 | 1456 | return; |
1457 | } | |
1458 | ||
d3d4a92f | 1459 | void AliFastGlauber::PlotLengthDistr(Int_t n,Bool_t save,const char *fname) |
a2f2f511 | 1460 | { |
1461 | // | |
1462 | // Plot length distribution | |
1463 | // | |
1464 | Double_t ell; | |
710a8d90 | 1465 | TH1F *hEll = new TH1F("hEll","Length distribution",64,-0.5,15); |
a2f2f511 | 1466 | hEll->SetXTitle("Transverse path length, L [fm]"); |
1467 | hEll->SetYTitle("Probability"); | |
1468 | hEll->SetFillColor(2); | |
a2f2f511 | 1469 | for(Int_t i=0; i<n; i++) { |
1470 | GetLength(ell); | |
1471 | hEll->Fill(ell); | |
1472 | } | |
1473 | hEll->Scale(1/(Double_t)n); | |
a2f2f511 | 1474 | TCanvas *cL = new TCanvas("cL","Length distribution",0,0,500,500); |
1475 | cL->cd(); | |
1476 | hEll->Draw(); | |
1477 | ||
1478 | if(save) { | |
1479 | TFile *f = new TFile(fname,"recreate"); | |
1480 | hEll->Write(); | |
1481 | f->Close(); | |
1482 | } | |
1483 | return; | |
1484 | } | |
1485 | ||
d3d4a92f | 1486 | void AliFastGlauber::PlotLengthB2BDistr(Int_t n,Bool_t save,const char *fname) |
a2f2f511 | 1487 | { |
1488 | // | |
1489 | // Plot lengths back-to-back distributions | |
1490 | // | |
1491 | Double_t ell1,ell2; | |
1492 | TH2F *hElls = new TH2F("hElls","Lengths back-to-back",100,0,15,100,0,15); | |
1493 | hElls->SetXTitle("Transverse path length, L [fm]"); | |
1494 | hElls->SetYTitle("Transverse path length, L [fm]"); | |
a2f2f511 | 1495 | for(Int_t i=0; i<n; i++) { |
1496 | GetLengthsBackToBack(ell1,ell2); | |
1497 | hElls->Fill(ell1,ell2); | |
1498 | } | |
1499 | hElls->Scale(1/(Double_t)n); | |
a2f2f511 | 1500 | TCanvas *cLs = new TCanvas("cLs","Length back-to-back distribution",0,0,500,500); |
1501 | gStyle->SetPalette(1,0); | |
1502 | cLs->cd(); | |
1503 | hElls->Draw("col,Z"); | |
a2f2f511 | 1504 | if(save) { |
1505 | TFile *f = new TFile(fname,"recreate"); | |
1506 | hElls->Write(); | |
1507 | f->Close(); | |
1508 | } | |
1509 | return; | |
1510 | } | |
1511 | ||
710a8d90 | 1512 | void AliFastGlauber::PlotAlmonds() const |
1513 | { | |
1514 | // | |
1515 | // Plot almonds for some impact parameters | |
1516 | // | |
1517 | TCanvas *c = new TCanvas("c","Almonds",0,0,500,500); | |
1518 | gStyle->SetPalette(1,0); | |
1519 | c->Divide(2,2); | |
1520 | c->cd(1); | |
7f2f270b | 1521 | fgWAlmondFixedB[0]->Draw("cont1"); |
710a8d90 | 1522 | c->cd(2); |
7f2f270b | 1523 | fgWAlmondFixedB[10]->Draw("cont1"); |
710a8d90 | 1524 | c->cd(3); |
7f2f270b | 1525 | fgWAlmondFixedB[20]->Draw("cont1"); |
710a8d90 | 1526 | c->cd(4); |
7f2f270b | 1527 | fgWAlmondFixedB[30]->Draw("cont1"); |
710a8d90 | 1528 | return; |
1529 | } | |
1530 | ||
65aa45f2 | 1531 | //=================== Added by A. Dainese 05/03/04 =========================== |
1532 | ||
1533 | void AliFastGlauber::CalculateI0I1(Double_t& integral0,Double_t& integral1, | |
1534 | Double_t b,Double_t x0,Double_t y0, | |
710a8d90 | 1535 | Double_t phi0,Double_t ellCut) const |
a2f2f511 | 1536 | { |
65aa45f2 | 1537 | // |
1538 | // Calculate integrals: | |
e9663638 | 1539 | // integral0 = \int_0^ellCut dl*(T_A*T_B)(x0+l*ux,y0+l*uy) |
1540 | // integral1 = \int_0^ellCut dl*l*(T_A*T_B)(x0+l*ux,y0+l*uy) | |
a2f2f511 | 1541 | // |
65aa45f2 | 1542 | // for a parton with production point (x0,y0) |
1543 | // and propagation direction (ux=cos(phi0),uy=sin(phi0)) | |
1544 | // in a collision with impact parameter b | |
1545 | // | |
1546 | ||
1547 | // number of steps in l | |
1548 | const Int_t kNp = 100; | |
1549 | const Double_t kDl = fgBMax/Double_t(kNp); | |
1550 | ||
1551 | // Initial radius | |
710a8d90 | 1552 | const Double_t kr0 = TMath::Sqrt(x0 * x0 + y0 * y0); |
1553 | const Int_t knps = Int_t ((fgBMax - kr0)/kDl) - 1; | |
65aa45f2 | 1554 | |
1555 | // Radial steps | |
1556 | Double_t l = 0.; | |
1557 | integral0 = 0.; | |
1558 | integral1 = 0.; | |
1559 | Int_t i = 0; | |
710a8d90 | 1560 | while((i < knps) && (l < ellCut)) { |
65aa45f2 | 1561 | // Transform into target frame |
710a8d90 | 1562 | const Double_t kxx = x0 + l * TMath::Cos(phi0) + b / 2.; |
1563 | const Double_t kyy = y0 + l * TMath::Sin(phi0); | |
1564 | const Double_t kphi = TMath::ATan2(kyy, kxx); | |
1565 | const Double_t kr1 = TMath::Sqrt(kxx*kxx + kyy*kyy); | |
65aa45f2 | 1566 | // Radius in projectile frame |
710a8d90 | 1567 | const Double_t kr2 = TMath::Sqrt(kr1*kr1 + b*b - 2.*kr1*b*TMath::Cos(kphi)); |
1568 | const Double_t kprodTATB = fgWSta->Eval(kr1) * fgWSta->Eval(kr2); | |
1569 | integral0 += kprodTATB * kDl; | |
1570 | integral1 += kprodTATB * l * kDl; | |
65aa45f2 | 1571 | l += kDl; |
1572 | i++; | |
1573 | } // steps | |
1574 | return; | |
1575 | } | |
1576 | ||
83f67d08 | 1577 | void AliFastGlauber::GetI0I1AndPhi(Double_t& integral0,Double_t& integral1, |
1578 | Double_t& phi, | |
1579 | Double_t ellCut,Double_t b) | |
65aa45f2 | 1580 | { |
a2f2f511 | 1581 | // |
65aa45f2 | 1582 | // Return I0 and I1 from random b, x0, y0, phi0 |
83f67d08 | 1583 | // Return also phi |
65aa45f2 | 1584 | // |
1585 | Double_t x0,y0,phi0; | |
1586 | if(b<0.) GetRandomBHard(b); | |
1587 | GetRandomXY(x0,y0); | |
1588 | GetRandomPhi(phi0); | |
83f67d08 | 1589 | phi = phi0; |
65aa45f2 | 1590 | CalculateI0I1(integral0,integral1,b,x0,y0,phi0,ellCut); |
1591 | return; | |
1592 | } | |
a2f2f511 | 1593 | |
83f67d08 | 1594 | void AliFastGlauber::GetI0I1(Double_t& integral0,Double_t& integral1, |
1595 | Double_t ellCut,Double_t b) | |
1596 | { | |
1597 | // | |
1598 | // Return I0 and I1 from random b, x0, y0, phi0 | |
1599 | // | |
1600 | Double_t phi; | |
1601 | GetI0I1AndPhi(integral0,integral1,phi,ellCut,b); | |
1602 | return; | |
1603 | } | |
1604 | ||
1605 | void AliFastGlauber::GetI0I1BackToBackAndPhi(Double_t& integral01,Double_t& integral11, | |
1606 | Double_t& integral02,Double_t& integral12, | |
1607 | Double_t& phi, | |
1608 | Double_t ellCut,Double_t b) | |
65aa45f2 | 1609 | { |
1610 | // | |
1611 | // Return 2 pairs of I0 and I1 back to back from random b, x0, y0, phi0 | |
83f67d08 | 1612 | // Return also phi0 |
65aa45f2 | 1613 | // |
1614 | Double_t x0,y0,phi0; | |
1615 | if(b<0.) GetRandomBHard(b); | |
1616 | GetRandomXY(x0,y0); | |
1617 | GetRandomPhi(phi0); | |
83f67d08 | 1618 | phi = phi0; |
710a8d90 | 1619 | const Double_t kphi0plusPi = phi0+TMath::Pi(); |
c54404bf | 1620 | CalculateI0I1(integral01,integral11,b,x0,y0,phi0,ellCut); |
1621 | CalculateI0I1(integral02,integral12,b,x0,y0,kphi0plusPi,ellCut); | |
1622 | return; | |
1623 | } | |
1624 | ||
1625 | void AliFastGlauber::GetI0I1BackToBackAndPhiAndXY(Double_t& integral01,Double_t& integral11, | |
1626 | Double_t& integral02,Double_t& integral12, | |
1627 | Double_t& phi,Double_t &x,Double_t &y, | |
1628 | Double_t ellCut,Double_t b) | |
1629 | { | |
1630 | // | |
1631 | // Return 2 pairs of I0 and I1 back to back from random b, x0, y0, phi0 | |
1632 | // Return also phi0 | |
1633 | // | |
1634 | Double_t x0,y0,phi0; | |
1635 | if(b<0.) GetRandomBHard(b); | |
1636 | GetRandomXY(x0,y0); | |
1637 | GetRandomPhi(phi0); | |
1638 | phi = phi0; x=x0; y=y0; | |
1639 | const Double_t kphi0plusPi = phi0+TMath::Pi(); | |
65aa45f2 | 1640 | CalculateI0I1(integral01,integral11,b,x0,y0,phi0,ellCut); |
710a8d90 | 1641 | CalculateI0I1(integral02,integral12,b,x0,y0,kphi0plusPi,ellCut); |
65aa45f2 | 1642 | return; |
1643 | } | |
a2f2f511 | 1644 | |
83f67d08 | 1645 | void AliFastGlauber::GetI0I1BackToBack(Double_t& integral01,Double_t& integral11, |
1646 | Double_t& integral02,Double_t& integral12, | |
1647 | Double_t ellCut,Double_t b) | |
1648 | { | |
1649 | // | |
1650 | // Return 2 pairs of I0 and I1 back to back from random b, x0, y0, phi0 | |
1651 | // | |
1652 | Double_t phi; | |
1653 | GetI0I1BackToBackAndPhi(integral01,integral11,integral02,integral12, | |
1654 | phi,ellCut,b); | |
1655 | return; | |
1656 | } | |
1657 | ||
65aa45f2 | 1658 | void AliFastGlauber::GetI0I1ForPythia(Int_t n,Double_t* phi, |
1659 | Double_t* integral0,Double_t* integral1, | |
1660 | Double_t ellCut,Double_t b) | |
1661 | { | |
1662 | // | |
1663 | // Returns I0 and I1 pairs for n partons with azimuthal angles phi[n] | |
1664 | // from random b, x0, y0 | |
1665 | // | |
1666 | Double_t x0,y0; | |
1667 | if(b<0.) GetRandomBHard(b); | |
1668 | GetRandomXY(x0,y0); | |
1669 | for(Int_t i=0; i<n; i++) | |
1670 | CalculateI0I1(integral0[i],integral1[i],b,x0,y0,phi[i],ellCut); | |
1671 | return; | |
1672 | } | |
1673 | ||
2e3b5c95 | 1674 | void AliFastGlauber::GetI0I1ForPythiaAndXY(Int_t n,Double_t* phi, |
1675 | Double_t* integral0,Double_t* integral1, | |
1676 | Double_t &x,Double_t& y, | |
1677 | Double_t ellCut,Double_t b) | |
1678 | { | |
1679 | // | |
1680 | // Returns I0 and I1 pairs for n partons with azimuthal angles phi[n] | |
1681 | // from random b, x0, y0 and return x0,y0 | |
1682 | // | |
1683 | Double_t x0,y0; | |
1684 | if(b<0.) GetRandomBHard(b); | |
1685 | GetRandomXY(x0,y0); | |
1686 | for(Int_t i=0; i<n; i++) | |
1687 | CalculateI0I1(integral0[i],integral1[i],b,x0,y0,phi[i],ellCut); | |
1688 | x=x0; | |
1689 | y=y0; | |
1690 | return; | |
1691 | } | |
1692 | ||
65aa45f2 | 1693 | void AliFastGlauber::PlotI0I1Distr(Int_t n,Double_t ellCut, |
d3d4a92f | 1694 | Bool_t save,const char *fname) |
65aa45f2 | 1695 | { |
1696 | // | |
bbf8513d | 1697 | // Plot I0-I1 distribution |
65aa45f2 | 1698 | // |
1699 | Double_t i0,i1; | |
bbf8513d | 1700 | TH2F *hI0I1s = new TH2F("hI0I1s","I_{0} versus I_{1}",1000,0,0.001,1000,0,0.01); |
1701 | hI0I1s->SetXTitle("I_{0} [fm^{-3}]"); | |
1702 | hI0I1s->SetYTitle("I_{1} [fm^{-2}]"); | |
1703 | ||
65aa45f2 | 1704 | TH1F *hI0 = new TH1F("hI0","I_{0} = #hat{q}L / k", |
bbf8513d | 1705 | 1000,0,0.001); |
65aa45f2 | 1706 | hI0->SetXTitle("I_{0} [fm^{-3}]"); |
1707 | hI0->SetYTitle("Probability"); | |
1708 | hI0->SetFillColor(3); | |
1709 | TH1F *hI1 = new TH1F("hI1","I_{1} = #omega_{c} / k", | |
bbf8513d | 1710 | 1000,0,0.01); |
65aa45f2 | 1711 | hI1->SetXTitle("I_{1} [fm^{-2}]"); |
1712 | hI1->SetYTitle("Probability"); | |
1713 | hI1->SetFillColor(4); | |
1714 | TH1F *h2 = new TH1F("h2","2 I_{1}^{2}/I_{0} = R / k", | |
1715 | 100,0,0.02); | |
1716 | h2->SetXTitle("2 I_{1}^{2}/I_{0} [fm^{-1}]"); | |
1717 | h2->SetYTitle("Probability"); | |
1718 | h2->SetFillColor(2); | |
1719 | TH1F *h3 = new TH1F("h3","2 I_{1}/I_{0} = L", | |
1720 | 100,0,15); | |
1721 | h3->SetXTitle("2 I_{1}/I_{0} [fm]"); | |
1722 | h3->SetYTitle("Probability"); | |
1723 | h3->SetFillColor(5); | |
1724 | TH1F *h4 = new TH1F("h4","I_{0}^{2}/(2 I_{1}) = #hat{q} / k", | |
1725 | 100,0,0.00015); | |
1726 | h4->SetXTitle("I_{0}^{2}/(2 I_{1}) [fm^{-4}]"); | |
1727 | h4->SetYTitle("Probability"); | |
1728 | h4->SetFillColor(7); | |
1729 | ||
1730 | for(Int_t i=0; i<n; i++) { | |
1731 | GetI0I1(i0,i1,ellCut); | |
bbf8513d | 1732 | hI0I1s->Fill(i0,i1); |
65aa45f2 | 1733 | hI0->Fill(i0); |
1734 | hI1->Fill(i1); | |
1735 | h2->Fill(2.*i1*i1/i0); | |
1736 | h3->Fill(2.*i1/i0); | |
1737 | h4->Fill(i0*i0/2./i1); | |
a2f2f511 | 1738 | } |
65aa45f2 | 1739 | hI0->Scale(1/(Double_t)n); |
1740 | hI1->Scale(1/(Double_t)n); | |
bbf8513d | 1741 | h2->Scale(1/(Double_t)n); |
1742 | h3->Scale(1/(Double_t)n); | |
1743 | h4->Scale(1/(Double_t)n); | |
1744 | hI0I1s->Scale(1/(Double_t)n); | |
65aa45f2 | 1745 | |
1746 | TCanvas *cI0I1 = new TCanvas("cI0I1","I0 and I1",0,0,900,700); | |
1747 | cI0I1->Divide(3,2); | |
1748 | cI0I1->cd(1); | |
1749 | hI0->Draw(); | |
1750 | cI0I1->cd(2); | |
1751 | hI1->Draw(); | |
1752 | cI0I1->cd(3); | |
1753 | h2->Draw(); | |
1754 | cI0I1->cd(4); | |
1755 | h3->Draw(); | |
1756 | cI0I1->cd(5); | |
1757 | h4->Draw(); | |
bbf8513d | 1758 | cI0I1->cd(6); |
1759 | gStyle->SetPalette(1,0); | |
1760 | hI0I1s->Draw("col,Z"); | |
a2f2f511 | 1761 | |
65aa45f2 | 1762 | if(save) { |
1763 | TFile *f = new TFile(fname,"recreate"); | |
bbf8513d | 1764 | hI0I1s->Write(); |
65aa45f2 | 1765 | hI0->Write(); |
1766 | hI1->Write(); | |
1767 | h2->Write(); | |
1768 | h3->Write(); | |
1769 | h4->Write(); | |
1770 | f->Close(); | |
1771 | } | |
a2f2f511 | 1772 | return; |
1773 | } | |
1774 | ||
65aa45f2 | 1775 | void AliFastGlauber::PlotI0I1B2BDistr(Int_t n,Double_t ellCut, |
d3d4a92f | 1776 | Bool_t save,const char *fname) |
a2f2f511 | 1777 | { |
1778 | // | |
bbf8513d | 1779 | // Plot I0-I1 back-to-back distributions |
a2f2f511 | 1780 | // |
65aa45f2 | 1781 | Double_t i01,i11,i02,i12; |
1782 | TH2F *hI0s = new TH2F("hI0s","I_{0}'s back-to-back",100,0,100,100,0,100); | |
1783 | hI0s->SetXTitle("I_{0} [fm^{-3}]"); | |
1784 | hI0s->SetYTitle("I_{0} [fm^{-3}]"); | |
1785 | TH2F *hI1s = new TH2F("hI1s","I_{1}'s back-to-back",100,0,100,100,0,100); | |
1786 | hI1s->SetXTitle("I_{1} [fm^{-2}]"); | |
1787 | hI1s->SetYTitle("I_{1} [fm^{-2}]"); | |
a2f2f511 | 1788 | |
65aa45f2 | 1789 | for(Int_t i=0; i<n; i++) { |
1790 | GetI0I1BackToBack(i01,i11,i02,i12,ellCut); | |
1791 | hI0s->Fill(i01,i02); | |
1792 | hI1s->Fill(i11,i12); | |
1793 | } | |
1794 | hI0s->Scale(1/(Double_t)n); | |
1795 | hI1s->Scale(1/(Double_t)n); | |
1796 | ||
1797 | TCanvas *cI0I1s = new TCanvas("cI0I1s","I0 and I1 back-to-back distributions",0,0,800,400); | |
a2f2f511 | 1798 | gStyle->SetPalette(1,0); |
65aa45f2 | 1799 | cI0I1s->Divide(2,1); |
1800 | cI0I1s->cd(1); | |
1801 | hI0s->Draw("col,Z"); | |
1802 | cI0I1s->cd(2); | |
1803 | hI1s->Draw("col,Z"); | |
a2f2f511 | 1804 | |
65aa45f2 | 1805 | if(save) { |
1806 | TFile *f = new TFile(fname,"recreate"); | |
1807 | hI0s->Write(); | |
1808 | hI1s->Write(); | |
1809 | f->Close(); | |
1810 | } | |
a2f2f511 | 1811 | return; |
1812 | } | |
710a8d90 | 1813 | |
a42548b0 | 1814 | AliFastGlauber& AliFastGlauber::operator=(const AliFastGlauber& rhs) |
1815 | { | |
1816 | // Assignment operator | |
1817 | rhs.Copy(*this); | |
1818 | return *this; | |
1819 | } | |
1820 | ||
1821 | void AliFastGlauber::Copy(TObject&) const | |
1822 | { | |
1823 | // | |
1824 | // Copy | |
1825 | // | |
1826 | Fatal("Copy","Not implemented!\n"); | |
1827 | } | |
1828 |