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Split femto code into two libraries
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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#include "AliGenHBTosl.h"
19#include "AliLog.h"
20
21//__________________________________________________________
22/////////////////////////////////////////////////////////////
23// //
24// class AliGenHBTosl //
25// //
26// Genarator simulating particle correlations //
27// //
28// The main idea of the generator is to produce particles //
29// according to some distribution of two particle //
30// property. In HBT they are qout,qsie and qlong. //
31// In order to be able to generate signal that produces //
32// given two particle correlation background must be //
33// known before in order to produce the shape of signal //
34// to randomize given distribution from. //
35// //
36// The generator works as follows: //
37// 1. Coarse Background (fQCoarseBackground) is generated //
38// ade from the particles //
39// given by the external generator (variable //
40// fGenerator) by the mixing technique. //
41// 2. Coarse signal is prduced by multiplying Coarse //
42// background by a required function //
43// See method FillCoarseSignal //
44// 3. Signal is randomized out of the coarse signal //
45// histogram (two particle property). First particle //
46// is taken from the external generator, and the //
47// second one is CALCULATED on the basis of the first //
48// one and the two particle property (qout,qside,qlong)//
49// Background is made by the mixing out of the //
50// genereted signal events. //
51// This step is cotinued up to the moment signal //
52// histogram has enough statistics (data member //
53// fMinFill) //
54// See method StartSignalPass1() //
55// 4. chi is calculated for each bin (chiarray variqable) //
56// (not the chi2 because sign is important) //
57// Two particle prioperty //
58// (qout,qside,qlong) is chosen at the points that //
59// chi is the smallest. First particle is taken from //
60// the the external generator (fGenerator) and second's /
61// momenta are caclulated out of their momenta and //
62// (qout,qside,qlong). Background is updated //
63// continuesely for all the events. This step is //
64// continued until stability conditions are fullfiled //
65// or maximum number of iteration is reached. //
66// 5. The same as step 4 but events are stored. //
67// //
68////////////////////////////////////////////////////////////
69
70#include <TCanvas.h>
71
72
73#include <TH3D.h>
74#include <TList.h>
75#include <TPDGCode.h>
76#include <TParticle.h>
77#include <AliStack.h>
78#include <TMath.h>
79#include <TVector3.h>
80#include <TStopwatch.h>
81#include <TFile.h>
82
83#include "AliGenCocktailAfterBurner.h"
84#include "AliGeVSimParticle.h"
85#include "AliGenGeVSim.h"
86#include "AliGenHIJINGpara.h"
87
88
89/***********************************************************/
90ClassImp(AliGenHBTosl)
91
92AliGenHBTosl::AliGenHBTosl():
93 AliGenerator(),
94 fQCoarseBackground(0x0),
95 fQCoarseSignal(0x0),
96 fQSignal(0x0),
97 fQBackground(0x0),
98 fQSecondSignal(0x0),
99 fQSecondBackground(0x0),
100 fQRange(0.06),
101 fQNBins(60),
102 fGenerator(0x0),
103 fStackBuffer(0),
104 fBufferSize(5),
105 fNBinsToScale(Int_t(fQNBins*0.1)),
106 fDebug(0),
107 fSignalShapeCreated(0),
108 fMaxIterations(1000),
109 fMaxChiSquereChange(0.01),
110 fMaxChiSquerePerNDF(1.5),
111 fQRadius(8.0),
112 fPID(kPiPlus),
113 fSamplePhiMin(-0.01),
114 fSamplePhiMax(TMath::TwoPi()+0.01),
115 fSignalRegion(0.0),
116 fMinFill(1000),
117 fSwapped(0),
118 fLogFile(0x0)
119{
120//default constructor
121}
122/***********************************************************/
123
124AliGenHBTosl::AliGenHBTosl(Int_t n, Int_t pid):
125 AliGenerator(n),
126 fQCoarseBackground(0x0),
127 fQCoarseSignal(0x0),
128 fQSignal(0x0),
129 fQBackground(0x0),
130 fQSecondSignal(0x0),
131 fQSecondBackground(0x0),
132 fQRange(0.06),
133 fQNBins(60),
134 fGenerator(0x0),
135 fStackBuffer(0),
136 fBufferSize(5),
137 fNBinsToScale(Int_t(fQNBins*0.1)),
138 fDebug(0),
139 fSignalShapeCreated(kFALSE),
140 fMaxIterations(1000),
141 fMaxChiSquereChange(0.01),
142 fMaxChiSquerePerNDF(1.5),
143 fQRadius(8.0),
144 fPID(pid),
145 fSamplePhiMin(-0.01),
146 fSamplePhiMax(TMath::TwoPi()+0.01),
147 fSignalRegion(0.0),
148 fMinFill(1000),
149 fSwapped(0),
150 fLogFile(0x0)
151{
152//default constructor
153}
154
155AliGenHBTosl::AliGenHBTosl(const AliGenHBTosl & hbt):
156 AliGenerator(-1),
157 fQCoarseBackground(0x0),
158 fQCoarseSignal(0x0),
159 fQSignal(0x0),
160 fQBackground(0x0),
161 fQSecondSignal(0x0),
162 fQSecondBackground(0x0),
163 fQRange(0.06),
164 fQNBins(60),
165 fGenerator(0x0),
166 fStackBuffer(0),
167 fBufferSize(5),
168 fNBinsToScale(Int_t(fQNBins*0.1)),
169 fDebug(0),
170 fSignalShapeCreated(kFALSE),
171 fMaxIterations(1000),
172 fMaxChiSquereChange(0.01),
173 fMaxChiSquerePerNDF(1.5),
174 fQRadius(8.0),
175 fPID(kPiPlus),
176 fSamplePhiMin(-0.01),
177 fSamplePhiMax(TMath::TwoPi()+0.01),
178 fSignalRegion(0.0),
179 fMinFill(1000),
180 fSwapped(0),
181 fLogFile(0x0)
182{
183// Copy constructor
184 hbt.Copy(*this);
185}
186/***********************************************************/
187
188AliGenHBTosl::~AliGenHBTosl()
189{
190//destructor
191 delete fQCoarseSignal;
192 delete fQCoarseBackground;
193 delete fQSignal;
194 delete fQBackground;
195 delete fGenerator;
196 delete fQSecondSignal;
197 delete fQSecondBackground;
198 delete fLogFile;
199}
200/***********************************************************/
201
202void AliGenHBTosl::Init()
203{
204 //Initializes generator
205 if (fGenerator == 0x0)
206 {
207
208 AliGenHIJINGpara* bkggen = new AliGenHIJINGpara(fNpart*4);
209 fGenerator = bkggen;
210
211/*
212 AliGenGeVSim * gevsim = new AliGenGeVSim(0.0);
213 AliGeVSimParticle* kplus = new AliGeVSimParticle(fPID,1,fNpart, 0.17, 0.9);
214 gevsim->AddParticleType(kplus);
215
216 fGenerator = gevsim;
217*/
218
219/*
220
221 AliMevSimConfig *c = new AliMevSimConfig(1);
222 c->SetRectPlane(1); // reaction plane control, model 4
223 c->SetGrid(80,80);
224
225 AliGenMevSim *mevsim = new AliGenMevSim(c);
226 mevsim->SetPtRange(0.001, 3);
227 mevsim->SetMomentumRange(0.1, 3);
228 mevsim->SetTrackingFlag(0);
229 mevsim->SetOrigin(0.0, 0.0, 0.0);
230 mevsim->SetSigma(0.0, 0.0, 0.0);
231 AliMevSimParticle *kplus = new AliMevSimParticle(kKPlus, fNpart, 0, 0.25, 0.0, 2, 0.15, 0.0, 0.0 );
232 mevsim->AddParticleType(kplus);
233 fGenerator = mevsim;
234*/
235
236 fGenerator->SetOrigin(fOrigin[0],fOrigin[1],fOrigin[2]);
237 static const Double_t kDegToRadCF = 180./TMath::Pi();
238 fGenerator->SetMomentumRange(fPtMin,fPtMax);
239 fGenerator->SetPhiRange(kDegToRadCF*fPhiMin,kDegToRadCF*fPhiMax);
240 fGenerator->SetYRange(fYMin,fYMax);
241 fGenerator->SetThetaRange(kDegToRadCF*fThetaMin,kDegToRadCF*fThetaMax);
242 fGenerator->Init();
243
244 }
245
246// fQCoarseBackground = new TH3D("fQCoarseBackground","",fQNBins,-fQRange,fQRange, fQNBins,-fQRange,fQRange, fQNBins,-fQRange,fQRange);
247// fQCoarseSignal = new TH3D("fQCoarseSignal","fQCoarseSignal",fQNBins,-fQRange,fQRange, fQNBins,-fQRange,fQRange, fQNBins,-fQRange,fQRange);
248// fQCoarseBackground->Sumw2();
249// fQCoarseSignal->Sumw2();
250
251 fQSignal = new TH3D("fQSignal1","fQSignal",fQNBins,-fQRange,fQRange, fQNBins,-fQRange,fQRange, fQNBins,-fQRange,fQRange);
252 fQBackground = new TH3D("fQBackground1","fQBackground",fQNBins,-fQRange,fQRange, fQNBins,-fQRange,fQRange, fQNBins,-fQRange,fQRange);
253
254 fQSecondSignal = new TH3D("fQSignal2","fQSignal",fQNBins,-fQRange,fQRange, fQNBins,-fQRange,fQRange, fQNBins,-fQRange,fQRange);
255 fQSecondBackground = new TH3D("fQBackground2","fQBackground",fQNBins,-fQRange,fQRange, fQNBins,-fQRange,fQRange, fQNBins,-fQRange,fQRange);
256
257 fQSignal->Sumw2();
258 fQBackground->Sumw2();
259 fQSecondSignal->Sumw2();
260 fQSecondBackground->Sumw2();
261
262 fLogFile = new ofstream("BadEvent",ios::out);
263
264}
265/***********************************************************/
266
267void AliGenHBTosl::Generate()
268{
269 //the main method
270
271 ofstream& logfile = *fLogFile;
272 logfile<<"Generate"<<"Attempts to generate "<<fNpart<<" particles.";
273
274
275 if (fStackBuffer == 0x0) fStackBuffer = new TList();
276 //Here is initialization level
277 if (fSignalShapeCreated == kFALSE)
278 {
279 TH3D *hs = 0x0, *hb = 0x0;
280 TFile* file;
281
282 file = TFile::Open("QTSignal.root");
283 if (file)
284 {
285 hs = (TH3D*)file->Get("fQSignal1");
286 if (hs) hs->SetDirectory(0x0);
287 }
288 delete file;
289
290 file = TFile::Open("QTBackground.root");
291 if (file)
292 {
293 hb = (TH3D*)file->Get("fQBackground1");
294 if (hb) hb->SetDirectory(0x0);
295 }
296 delete file;
297
298 if (hs && hb)
299 {
300 Info("Generate","**********************************");
301 Info("Generate","Found starting histograms in files");
302 Info("Generate","**********************************");
303 delete fQSignal;
304 delete fQBackground;
305 fQSignal = hs;
306 fQBackground = hb;
307 }
308 else
309 {
310 TH3D *cs = 0x0, *cb = 0x0;
311 file = TFile::Open("QTCoarseBackground.root");
312 if (file)
313 {
314 cb = (TH3D*)file->Get("fQCoarseBackground");
315 if (cb) cb->SetDirectory(0x0);
316 }
317 delete file;
318
319 file = TFile::Open("QTCoarseSignal.root");
320 if (file)
321 {
322 cs = (TH3D*)file->Get("fQCoarseSignal");
323 if (cs) cs->SetDirectory(0x0);
324 }
325 delete file;
326
327 if (cs && cb)
328 {
329
330 Info("Generate","Got Coarse signal and bkg from files");
331 delete fQCoarseBackground;
332 delete fQCoarseSignal;
333 fQCoarseSignal = cs;
334 fQCoarseBackground = cb;
335 }
336 else
337 {
338 if (cb)
339 {
340 Info("Generate","Got Coarse bkg from file");
341 delete fQCoarseBackground;
342 fQCoarseBackground = cb;
343 }
344 else
345 {
346 fQCoarseBackground = new TH3D("fQCoarseBackground","",fQNBins,-fQRange,fQRange, fQNBins,-fQRange,fQRange, fQNBins,-fQRange,fQRange);
347 fQCoarseBackground->Sumw2();
348
349 FillCoarse(); //create coarse background - just to know the spectrum
350 }
351
352 fQCoarseSignal = new TH3D("fQCoarseSignal","fQCoarseSignal",fQNBins,-fQRange,fQRange, fQNBins,-fQRange,fQRange, fQNBins,-fQRange,fQRange);
353 fQCoarseSignal->Sumw2();
354 FillCoarseSignal();//create first coarse signal by brutal multplication coarse background and required function shape
355 }
356
357 StartSignal(); //Initilizes the stack that is used for generation
358 }
359 fSignalShapeCreated = kTRUE;
360 }
361
362 AliStack* stack = RotateStack();
363
364 AliStack* genstack = fGenerator->GetStack();
365 if (genstack == 0x0)
366 {
367 genstack = new AliStack(fNpart);
368 fGenerator->SetStack(genstack);
369 }
370 else
371 {
372 genstack->Reset();
373 }
374
375 fGenerator->Generate();
376 Int_t j = 0, ntr = 0;
377 if ( genstack->GetNtrack() < fNpart/2)
378 {
379 Warning("Generate","************************************************************");
380 Warning("Generate","Generator generated (%d) less particles then expected (%d).",
381 stack->GetNtrack(),fNpart/2);
382 Warning("Generate","************************************************************");
383 }
384
385 TH3D* work = new TH3D("work","work",fQNBins,-fQRange,fQRange,fQNBins,-fQRange,fQRange,fQNBins,-fQRange,fQRange);
386 work->SetDirectory(0x0);
387 work->Sumw2();
388
389 Double_t*** chiarray = new Double_t** [fQNBins+1];
390 Double_t*** sigarray = new Double_t** [fQNBins+1];
391
392 for (Int_t i = 1; i<=fQNBins; i++)
393 {
394 chiarray[i] = new Double_t* [fQNBins+1];
395 sigarray[i] = new Double_t* [fQNBins+1];
396
397 for (Int_t k = 1; k<=fQNBins; k++)
398 {
399 chiarray[i][k] = new Double_t [fQNBins+1];
400 sigarray[i][k] = new Double_t [fQNBins+1];
401 }
402 }
403
404
405 Double_t scale = Scale(fQSignal,fQBackground);
406 work->Divide(fQSignal,fQBackground,scale);
407
408 Double_t binwdh = work->GetBinWidth(1)/2.;
409
410 for (Int_t k = 1; k<=fQNBins; k++)
411 {
412 Double_t z = work->GetZaxis()->GetBinCenter(k);
413 for (Int_t j = 1; j<=fQNBins; j++)
414 {
415 Double_t y = work->GetYaxis()->GetBinCenter(j);
416 for (Int_t i = 1; i<=fQNBins; i++)
417 {
418 sigarray[i][j][k] = fQSignal->GetBinContent(i,j,k);//store current value of signal histogram
419 Double_t x = work->GetXaxis()->GetBinCenter(i);//get center value of a bin (qinv)
420 Double_t v = GetQOutQSideQLongCorrTheorValue(x,y,z);//get expected value of CF in that qinv
421 Double_t diff = v - work->GetBinContent(i,j,k);//store difference betweeon current value, and desired value
422 chiarray[i][j][k] = diff; // no-x x is a weight to get good distribution
423 }
424 }
425 }
426
427 char msg[1000];
428 logfile<<endl;
429 sprintf(msg,"\n");
430 Int_t middlebin = fQNBins/2;
431
432 for (Int_t k = middlebin-5; k < middlebin+5; k++)
433 {
434 Double_t tx = work->GetXaxis()->GetBinCenter(30);
435 Double_t ty = work->GetYaxis()->GetBinCenter(30);
436 Double_t tz = work->GetZaxis()->GetBinCenter(k);
437 sprintf(msg,"% 6.5f ",GetQOutQSideQLongCorrTheorValue(tx,ty,tz));
438 logfile<<msg;
439 }
440 logfile<<endl;
441
442 for (Int_t k = middlebin-5; k < middlebin+5; k++)
443 {
444 sprintf(msg,"% 6.5f ",work->GetBinContent(30,30,k));
445 logfile<<msg;
446 }
447 logfile<<endl;
448
449 for (Int_t k = middlebin-5; k < middlebin+5; k++)
450 {
451 sprintf(msg,"% 6.5f ",chiarray[30][30][k]);
452 logfile<<msg;
453 }
454 logfile<<endl;
455
456 TParticle particle(fPID,0,-1,-1,-1,-1,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0);
457 TParticle* second = &particle;
458
459 Bool_t shortloop = kTRUE;
460 Int_t sc = 0;//security check against infinite loop
461
462 while ( (ntr+1) < fNpart)
463 {
464 Int_t xmax = 1;
465 Int_t ymax = 1;
466 Int_t zmax = 1;
467 Double_t qout;
468 Double_t qside;
469 Double_t qlong;
470
471
472 Int_t loopmin;
473 Int_t loopmax;
474
475 if (shortloop)
476 {
477 shortloop = kFALSE;
478 loopmax = fQNBins;
479 loopmin = 1;
480 }
481 else
482 {
483 shortloop = kTRUE;
484 loopmax = fQNBins/2+fQNBins/4;
485 loopmin = fQNBins/2-fQNBins/4;
486 }
487
488
489 for (Int_t k = loopmin; k <=loopmax; k++ )
490 {
491 qlong = work->GetZaxis()->GetBinCenter(k);
492 for (Int_t j = loopmin; j<=loopmax; j++)
493 {
494 qside = work->GetYaxis()->GetBinCenter(j);
495 for (Int_t i = loopmin; i<=loopmax; i++)
496 {
497 qout = work->GetXaxis()->GetBinCenter(i);
498 if (chiarray[xmax][ymax][zmax] < chiarray[i][j][k])
499 {
500 xmax = i;
501 ymax = j;
502 zmax = k;
503 }
504
505// Double_t qdist = TMath::Sqrt(qout*qout + qside*qside + qlong*qlong);
506
507// Double_t fact = chiarray[i][j][k];//chiarray is chi2
508// if (fact > work->GetBinError(i,j,k))//if differece between what we want and
509// { //what we have is bigger than stat. error
510// xmax = i; //we force to fill that bin
511// ymax = j;
512// zmax = k;
513// break;
514// }
515 }
516 }
517 }
518 Double_t qlongc = work->GetZaxis()->GetBinCenter(zmax);
519 Double_t qsidec = work->GetYaxis()->GetBinCenter(ymax);
520 Double_t qoutc = work->GetXaxis()->GetBinCenter(xmax);
521
522
523 sprintf(msg,"Generate Fill bin chi2(%d,%d,%d)=%f",xmax,ymax,zmax,chiarray[xmax][ymax][zmax]);
524 logfile<<msg;
525
526 qout = gRandom->Uniform(qoutc -binwdh, qoutc +binwdh);
527 qside = gRandom->Uniform(qsidec-binwdh, qsidec+binwdh);
528 qlong = gRandom->Uniform(qlongc-binwdh, qlongc+binwdh);
529
530 TParticle* first = 0;
531 while (j < genstack->GetNtrack())
532 {
533 TParticle* tmpp = genstack->Particle(j++);
534 if (tmpp->GetPdgCode() == fPID)
535 {
536 if (CheckParticle(tmpp,0x0,stack) == kFALSE)
537 {
538 first = tmpp;
539 break;
540 }
541 }
542 }
543
544 if (first == 0x0)
545 {
546 if ( fDebug > 2 ) Info("StartSignal","No more particles of that type");
547 break;
548 }
549
550 //Here put the check if this particle do not fall into signal region with other partticle
551
552 Int_t retval = GetThreeD(first,second,qout,qside,qlong);
553 if (retval)
554 {
555 //Info("StartSignal","Can not find momenta for this OSL and particle");
556 continue;
557 }
558 //in case this particle is falling into signal area with another
559 //particle we take a another pair
560 //it can intruduce artificial correlations
561 Bool_t checkresult = CheckParticle(second,first,stack);
562 if ( checkresult && (sc < 10) )
563 {
564 sc++;
565 continue;
566 }
567 sc = 0;
568
569 //Put on output stack
570 SetTrack(first,ntr);
571 SetTrack(second,ntr);
572
573 //Put on internal stack
574 Int_t etmp;
575 SetTrack(first,etmp,stack);
576 SetTrack(second,etmp,stack);
577
578 Double_t y = GetQOutQSideQLongCorrTheorValue(qoutc,qsidec,qlongc);
579
580 sigarray[xmax][ymax][zmax] ++;
581 chiarray[xmax][ymax][zmax] = scale*sigarray[xmax][ymax][zmax]/fQBackground->GetBinContent(xmax,ymax,zmax);
582 chiarray[xmax][ymax][zmax] = (y - chiarray[xmax][ymax][zmax]);
583
584 }
585
586 Mix(fStackBuffer,fQBackground,fQSecondSignal); //upgrate background
587 Mix(stack,fQSignal,fQSecondBackground); //upgrate signal
588
589 delete work;
590
591 for (Int_t i = 1; i<=fQNBins; i++)
592 {
593 for (Int_t k = 1; k<=fQNBins; k++)
594 {
595 delete [] chiarray[i][k];
596 delete [] sigarray[i][k];
597 }
598 delete [] chiarray[i];
599 delete [] sigarray[i];
600 }
601 delete [] chiarray;
602 delete [] sigarray;
603}
604/***********************************************************/
605
606void AliGenHBTosl::GetOneD(TParticle* first, TParticle* second,Double_t qinv)
607{
608//deprecated method that caclulates momenta of the second particle
609// out of qinv and the first particle
610//first particle is rotated that only X is non-zero
611
612
613 Double_t m = first->GetMass();
614 Double_t msqrd = m*m;
615 Double_t fourmassSquered = 4.*msqrd;
616
617 //Condition that R must fullfill to be possible to have qinv less smaller then randomized
618// Double_t rRange = qinv*TMath::Sqrt(qinv*qinv + fourmassSquered)/fourmassSquered;
619// Double_t r = gRandom->Uniform(rRange);
620
621 Double_t r = gRandom->Uniform(qinv);
622 Double_t phi = gRandom->Uniform(TMath::TwoPi());
623
624 Double_t firstPx = first->P();//first particle is rotated that only X is non-zero thus P==Px
625 Double_t px = 2.*msqrd*firstPx + firstPx*qinv*qinv;
626 Double_t temp = qinv*qinv*qinv*qinv + fourmassSquered * (qinv*qinv - r*r );
627 if (temp < 0.0)
628 {
629 Error("GetOneD","temp is less then 0: %f",temp);
630 return;
631 }
632 temp = temp*(msqrd+firstPx*firstPx);
633
634 px = (px - TMath::Sqrt(temp))/(2.*msqrd);
635
636 Double_t py = r*TMath::Sin(phi);
637 Double_t pz = r*TMath::Cos(phi);
638
639 TVector3 firstpvector(first->Px(),first->Py(),first->Pz());
640 TVector3 vector(px,py,pz);
641 Rotate(firstpvector,vector);
642
643 Double_t e = TMath::Sqrt(msqrd + vector.X()*vector.X() + vector.Y()*vector.Y() + vector.Z()*vector.Z());
644 second->SetMomentum(vector.X(),vector.Y(),vector.Z(),e);
645// TParticle* f = new TParticle(first->GetPdgCode(),0,-1,-1,-1,-1, firstPx,0,0,e=TMath::Sqrt(msqrd+firstPx*firstPx),0.0,0.0,0.0,0.0);
646// TParticle(pdg, is, parent, -1, kFirstDaughter, kLastDaughter,
647// px, py, pz, e, vx, vy, vz, tof);
648
649 AliDebug(1,Form("Randomized qinv = %f, obtained = %f",qinv,GetQInv(first,second)));
650
651}
652/***********************************************************/
653
654Int_t AliGenHBTosl::GetThreeD(TParticle* first,TParticle* second, Double_t qout, Double_t qside, Double_t qlong)
655{
656//deprecated method that caclulates momenta of the second particle
657//out of qout qside and qlong and the first particle
658 Double_t m = first->GetMass();
659 Double_t m2 = m*m;
660
661 Double_t px = first->P();//first particle is rotated that only X is non-zero thus P==Px
662 Double_t px2 = px*px;
663
664
665 Double_t qout2 = qout*qout;
666 Double_t qside2 = qside*qside;
667 Double_t qlong2 = qlong*qlong;
668
669
670 Double_t util1 = 4.*px2 - qside2;//4*P1x^2 - Y^2
671 if (util1 < 0)
672 {
673 Info("GetThreeD","4.*px2* - qside2 is negative px: %f, qside: %f",px,qside);
674 return 1;
675 }
676 Double_t util2 = TMath::Sqrt(px2*qout2*util1);
677
678
679 Double_t p2x,p2y,p2z;
680
681// if ( (qside >= 0) && (qout >= 0) && (qlong >= 0))
682 if (qout >= 0)
683 {
684 //p2x
685 Double_t tmp = px*(2.*px2 - qside2);
686 tmp -= util2;
687 p2x = tmp/(2.*px2);
688
689 //p2y
690 tmp = qout - TMath::Sqrt(util1);
691 p2y = - (tmp*qside)/(2.*px);
692
693 //p2z
694 tmp = 4.*m2 + 2.*qout2+qlong2;
695 tmp *= px;
696 tmp -= 2.*util2;//!!!
697 tmp += 4.*px*px2;
698 tmp *= qlong2;
699
700 Double_t m2px2 = m2+px2;
701 Double_t tmp2 = m2px2*tmp;
702
703 tmp = 4.*(m2px2+qout2) + qlong2;
704 tmp *= px;
705 tmp -= 4.*util2;
706 tmp *= 4.*(m2px2) + qlong2;
707 tmp *= qlong2*qlong2;
708 tmp *= m2px2*m2px2;
709 tmp *= px;
710 if (tmp < 0)
711 {
712 Error("","Argument of sqrt is negative");
713 return 1;
714 }
715
716 tmp2 += TMath::Sqrt(tmp);
717
718 tmp = 8.0*px*m2px2*m2px2;
719 p2z = -TMath::Sqrt(tmp2/tmp);
720 if (qlong < 0) p2z = -p2z;
721 }
722 else
723 {
724 //p2x
725 Double_t tmp = px*(2.*px2 - qside2);
726 tmp += util2;
727 p2x = tmp/(2.*px2);
728
729 //p2y
730 tmp = qout - TMath::Sqrt(util1);
731 p2y = - (tmp*qside)/(2.*px);
732
733 //p2z
734 tmp = 4.*m2 + 2.*qout2+qlong2;
735 tmp *= px;
736 tmp += 2.*util2;//!!!
737 tmp += 4.*px*px2;
738 tmp *= qlong2;
739
740 Double_t m2px2 = m2+px2;
741 Double_t tmp2 = m2px2*tmp;
742
743 tmp = 4.*(m2px2+qout2) + qlong2;
744 tmp *= px;
745 tmp += 4.*util2;
746 tmp *= 4.*(m2px2) + qlong2;
747 tmp *= qlong2*qlong2;
748 tmp *= m2px2*m2px2;
749 tmp *= px;
750 if (tmp < 0)
751 {
752 Error("","Argument of sqrt is negative");
753 return 1;
754 }
755
756 tmp2 += TMath::Sqrt(tmp);
757
758 tmp = 8.0*px*m2px2*m2px2;
759 p2z = -TMath::Sqrt(tmp2/tmp);
760 if (qlong < 0) p2z = -p2z;
761 }
762
763// if ( (qside >= 0) && (qout >= 0) && (qlong >= 0)) p2z = -p2z;
764
765 TVector3 firstpvector(first->Px(),first->Py(),first->Pz());
766 TVector3 vector(p2x,p2y,p2z);
767 Rotate(firstpvector,vector);
768
769 Double_t e = TMath::Sqrt(m2 + vector.X()*vector.X() + vector.Y()*vector.Y() + vector.Z()*vector.Z());
770 second->SetMomentum(vector.X(),vector.Y(),vector.Z(),e);
771
772////////////
773 if ( AliDebugLevel() > 3 )
774 {
775 e=TMath::Sqrt(m2+px*px);
776 TParticle* f = new TParticle(first->GetPdgCode(),0,-1,-1,-1,-1, px , 0.0, 0.0, e,0.0,0.0,0.0,0.0);
777
778 e = TMath::Sqrt(m2 + p2x*p2x + p2y*p2y + p2z*p2z);
779 TParticle* s = new TParticle(first->GetPdgCode(),0,-1,-1,-1,-1, p2x, p2y, p2z, e, 0.0, 0.0, 0.0, 0.0);
780
781 Double_t qo, qs, ql;
782 GetQOutQSideQLong(f,s,qo, qs, ql);
783
784 Info("GetThreeD","TEST");
785 f->Print();
786 s->Print();
787 Info("GetThreeD","Required %f %f %f",qout,qside,qlong);
788 Info("GetThreeD","Got %f %f %f",qo,qs,ql);
789 if ( qout == qo)
790 if (qside == qs)
791 if (qlong == ql)
792 Info("GetThreeD","!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
793 }
794/////////////
795 return 0;
796}
797/***********************************************************/
798
799void AliGenHBTosl::StartSignal()
800{
801//Starts the signal histograms
802 ofstream& logfile = *fLogFile;
803 logfile<<"\n\n\n\n";
804 logfile<<"************************************************"<<endl;
805 logfile<<"************************************************"<<endl;
806 logfile<<" StartSignal "<<endl;
807 logfile<<"************************************************"<<endl;
808 logfile<<"************************************************"<<endl;
809
810 AliStack* stack;
811
812 fSwapped = kFALSE;
813
814 TParticle particle(fPID,0,-1,-1,-1,-1,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0);
815 TParticle* second = &particle;
816
817 TIter next(fStackBuffer);
818 while(( stack=(AliStack*)next() ))
819 {
820 stack->Reset();
821 }
822
823 AliStack* genstack = fGenerator->GetStack();
824 if (genstack == 0x0)
825 {
826 genstack = new AliStack(fNpart);
827 fGenerator->SetStack(genstack);
828 }
829 else
830 {
831 genstack->Reset();
832 }
833
834 StartSignalPass1();
835 //We alread have detailed histograms and we do not need Coarse anymore
836 delete fQCoarseSignal;
837 delete fQCoarseBackground;
838 fQCoarseSignal = 0x0;
839 fQCoarseBackground = 0x0;
840
841
842 const Double_t kNDF = fQNBins*fQNBins*fQNBins;
843
844 TH3D* work = new TH3D("work","work",fQNBins,-fQRange,fQRange,fQNBins,-fQRange,fQRange,fQNBins,-fQRange,fQRange);
845 work->Sumw2();
846 work->SetDirectory(0x0);
847
848
849 Double_t binwdh = work->GetBinWidth(1)/2.;
850
851 Double_t*** chiarray = new Double_t** [fQNBins+1];
852 Double_t*** sigarray = new Double_t** [fQNBins+1];
853
854 for (Int_t i = 1; i<=fQNBins; i++)
855 {
856 chiarray[i] = new Double_t* [fQNBins+1];
857 sigarray[i] = new Double_t* [fQNBins+1];
858
859 for (Int_t k = 1; k<=fQNBins; k++)
860 {
861 chiarray[i][k] = new Double_t [fQNBins+1];
862 sigarray[i][k] = new Double_t [fQNBins+1];
863 }
864 }
865
866
867 Float_t chisqrchange = fMaxChiSquereChange + 1.;
868 Float_t chisqrPerDF = fMaxChiSquerePerNDF;
869 Float_t chisqrold = 0.0;
870
871 Int_t counter = 1;
872 Int_t niterations = 1;
873 Int_t rotaxisorder = 1;//defines order of looping over 3D histo (X,Y,Z or Y,Z,X or Z,X,Y)
874
875 Bool_t flag = kTRUE;
876 Bool_t shortloop = kTRUE;
877 TCanvas* c1 = new TCanvas();
878
879
880 printf("\n");
881 Info("StartSignal","\n\n\n\nSecond Pass\n\n\n\n");
882
883 while ( ( (chisqrPerDF > fMaxChiSquereChange) || flag) && (niterations++ < fMaxIterations) )
884 {
885
886 logfile<<"StartSignal\n";
887 logfile<<" Row 1 Theory, 2 current value, 3 Chi2 \n";
888
889 Double_t chisqrnew = 0.0;
890 flag = kFALSE;
891
892 Double_t scale = Scale(fQSignal,fQBackground);
893 work->Divide(fQSignal,fQBackground,scale);
894
895 if ( (counter%100) == 0)
896 {
897 c1->cd();
898 char buff[50];
899 sprintf(buff,"QTWorkPass2.%3d.root",counter);
900 TFile* file = TFile::Open(buff,"update");
901 work->Write();
902 work->SetDirectory(0x0);
903 file->Close();
904 delete file;
905
906 sprintf(buff,"QTBackgroundPass2.%3d.root",counter);
907 file = TFile::Open(buff,"update");
908 fQBackground->Write();
909 fQBackground->SetDirectory(0x0);
910 file->Close();
911 delete file;
912
913 sprintf(buff,"QTSignalPass2.%3d.root",counter);
914 file = TFile::Open(buff,"update");
915 fQSignal->Write();
916 fQSignal->SetDirectory(0x0);
917 file->Close();
918 delete file;
919 }
920
921 counter++;
922 Int_t novertresh = 0;
923 for (Int_t k = 1; k<=fQNBins; k++)
924 {
925 Double_t z = work->GetZaxis()->GetBinCenter(k);
926 for (Int_t j = 1; j<=fQNBins; j++)
927 {
928 Double_t y = work->GetYaxis()->GetBinCenter(j);
929 for (Int_t i = 1; i<=fQNBins; i++)
930 {
931 Double_t x = work->GetXaxis()->GetBinCenter(i);//get center value of a bin (qout)
932 sigarray[i][j][k] = fQSignal->GetBinContent(i,j,k);//store current value of signal histogram
933 Double_t v = GetQOutQSideQLongCorrTheorValue(x,y,z);//get expected value of CF in that qinv
934 Double_t diff = v - work->GetBinContent(i,j,k);//store difference betweeon current value, and desired value
935 chiarray[i][j][k] = diff; // no-x x is a weight to get good distribution
936 Double_t be = work->GetBinError(i,j,k);
937 chisqrnew += diff*diff/(be*be);//add up chisq
938
939 //even if algorithm is stable (chi sqr change less then threshold)
940 //and any bin differs more then 5% from expected value we continue
941 Double_t fact = diff;
942 if (TMath::Abs(fact) > 0.1)
943 {
944 flag = kTRUE;
945 novertresh++;
946 }
947 }
948 }
949 }
950
951
952 char msg[1000];
953
954 printf("\n");
955
956 for (Int_t k = 25; k < 36; k++)
957 {
958 Double_t tx = work->GetXaxis()->GetBinCenter(30);
959 Double_t ty = work->GetYaxis()->GetBinCenter(30);
960 Double_t tz = work->GetZaxis()->GetBinCenter(k);
961 sprintf(msg,"% 6.5f ",GetQOutQSideQLongCorrTheorValue(tx,ty,tz));
962 logfile<<msg;
963 }
964 logfile<<endl;
965
966 for (Int_t k = 25; k < 36; k++)
967 {
968 sprintf(msg,"%6.5f ",work->GetBinContent(30,30,k));
969 logfile<<msg;
970 }
971 logfile<<endl;
972
973 for (Int_t k = 25; k < 36; k++)
974 {
975 sprintf(msg,"% 6.5f ",chiarray[30][30][k]);
976 logfile<<msg;
977 }
978 logfile<<endl;
979
980 chisqrchange = TMath::Abs(chisqrnew - chisqrold)/chisqrnew;
981 chisqrold = chisqrnew;
982
983 chisqrPerDF = chisqrnew/kNDF;
984
985 Info("StartSignal","Iteration %d Chi-sq change %f%%",niterations,chisqrchange*100.0);
986 Info("StartSignal","ChiSq = %f, NDF = %f, ChiSq/NDF = %f",chisqrnew, kNDF, chisqrPerDF );
987 Info("StartSignal","novertresh = %d",novertresh);
988
989
990 stack = RotateStack();
991 genstack->Reset();
992 fGenerator->Generate();
993 Int_t ninputparticle = 0, ntr = 0;
994 if ( genstack->GetNtrack() < fNpart/2)
995 {
996 Warning("StartSignal","**********************************");
997 Warning("StartSignal","Generator generated (%d) less particles then expected (%d).",
998 genstack->GetNtrack(),fNpart/2);
999 Warning("StartSignal","**********************************");
1000 }
1001
1002 Int_t sc = 0; //security check against infinite loop
1003 while ( (ntr+1) < fNpart)//ntr is number of track generated up to now
1004 {
1005 Int_t xmax = 1;
1006 Int_t ymax = 1;
1007 Int_t zmax = 1;
1008 Double_t qout;
1009 Double_t qside;
1010 Double_t qlong;
1011
1012 Int_t i,j,k;
1013
1014 Int_t* cx = 0x0;
1015 Int_t* cy = 0x0;
1016 Int_t* cz = 0x0;
1017
1018 switch (rotaxisorder)
1019 {
1020 case 1:
1021 cx = &i;
1022 cy = &j;
1023 cz = &k;
1024 break;
1025 case 2:
1026 cx = &j;
1027 cy = &k;
1028 cz = &i;
1029 break;
1030 case 3:
1031 cx = &k;
1032 cy = &i;
1033 cz = &j;
1034 break;
1035 }
1036 rotaxisorder++;
1037 if (rotaxisorder > 3) rotaxisorder = 1;
1038 Int_t nrange;
1039
1040 if (shortloop)
1041 {
1042 shortloop = kFALSE;
1043 nrange = fQNBins;
1044 }
1045 else
1046 {
1047 shortloop = kTRUE;
1048 nrange = fQNBins/4;
1049 }
1050
1051// Bool_t force = kFALSE;
1052 for ( k = 1; k <=nrange;k++ )
1053 {
1054 for ( j = 1; j<=nrange; j++)
1055 {
1056 for ( i = 1; i<=nrange; i++)
1057 {
1058 if ( (chiarray[*cx][*cy][*cz]) > (chiarray[xmax][ymax][zmax]) )
1059 {
1060 xmax = *cx;
1061 ymax = *cy;
1062 zmax = *cz;
1063 }
1064
1065// Double_t fact = chiarray[*cx][*cy][*cz];//chiarray is chi2*qinv
1066// if (fact > work->GetBinError(*cx,*cy,*cz))//if differece between what we want and
1067// { //what we have is bigger than stat. error
1068// //we force to fill that bin
1069// qout = work->GetXaxis()->GetBinCenter(*cx);
1070// qside = work->GetYaxis()->GetBinCenter(*cy);
1071// qlong = work->GetZaxis()->GetBinCenter(*cz);
1072
1073// Info("StartSignal"," bin: (%d,%d,%d) loop status (%d,%d,%d) \nUsing Force: chiarray: %f \nq(o,s,l): (%f,%f,%f) signal: %d background: %d binerror: %f",
1074// *cx,*cy,*cz,i,j,k,fact,qout,qside,qlong,
1075// (Int_t)sigarray[*cx][*cy][*cz],(Int_t)fQBackground->GetBinContent(*cx,*cy,*cz),work->GetBinError(*cx,*cy,*cz));
1076// force = kTRUE;
1077// break;
1078// }
1079
1080 }
1081// if (force) break;
1082 }
1083// if (force) break;
1084 }
1085
1086
1087 qout = work->GetXaxis()->GetBinCenter(xmax);
1088 qside = work->GetYaxis()->GetBinCenter(ymax);
1089 qlong = work->GetZaxis()->GetBinCenter(zmax);
1090
1091// Info("StartSignal"," bin: (%d,%d,%d) chiarray: %f \nq(o,s,l): (%f,%f,%f) signal: %d background: %d binerror: %f",
1092// xmax,ymax,zmax,chiarray[xmax][ymax][zmax],qout,qside,qlong,
1093// (Int_t)sigarray[xmax][ymax][zmax],
1094// (Int_t)fQBackground->GetBinContent(xmax,ymax,zmax),
1095// work->GetBinError(xmax,ymax,zmax));
1096
1097 qout = gRandom->Uniform(qout-binwdh,qout+binwdh);
1098 qside = gRandom->Uniform(qside-binwdh,qside+binwdh);
1099 qlong = gRandom->Uniform(qlong-binwdh,qlong+binwdh);
1100
1101 TParticle* first = 0;
1102 while (ninputparticle < genstack->GetNtrack())
1103 {
1104 TParticle* tmpp = genstack->Particle(ninputparticle++);
1105 if (tmpp->GetPdgCode() == fPID)
1106 {
1107 if (CheckParticle(tmpp,0x0,stack) == kFALSE)
1108 {
1109 first = tmpp;
1110 break;
1111 }
1112 }
1113 }
1114
1115 if (first == 0x0)
1116 {
1117 if ( fDebug > 2 ) Info("StartSignal","No more particles of that type");
1118 break;
1119 }
1120
1121 Int_t retval = GetThreeD(first,second,qout,qside,qlong);
1122 if (retval)
1123 {
1124 Info("StartSignal","Can not find momenta for this OSL and particle OSL = %f %f %f",qout,qside,qlong);
1125 first->Print();
1126 second->Print();
1127
1128 continue;
1129 }
1130 //in case this particle is falling into signal area with another
1131 //particle we take a another pair
1132 //it can intruduce artificial correlations
1133 Bool_t checkresult = CheckParticle(second,first,stack);
1134 if ( checkresult && (sc < 10) )
1135 {
1136 sc++;
1137 continue;
1138 }
1139 sc = 0;
1140
1141 //Put on output stack
1142 SetTrack(first,ntr,stack);
1143 SetTrack(second,ntr,stack);
1144
1145 Double_t y = GetQOutQSideQLongCorrTheorValue(qout,qside,qlong);
1146
1147 sigarray[xmax][ymax][zmax] ++;
1148 chiarray[xmax][ymax][zmax] = scale*sigarray[xmax][ymax][zmax]/fQBackground->GetBinContent(xmax,ymax,zmax);
1149 chiarray[xmax][ymax][zmax] = (y - chiarray[xmax][ymax][zmax]);
1150
1151 }
1152 Info("StartSignal","Mixing background...");
1153 Mix(fStackBuffer,fQBackground,fQSecondBackground); //upgrate background
1154 Info("StartSignal","Mixing signal...");
1155 Mix(stack,fQSignal,fQSecondSignal); //upgrate background
1156
1157
1158// if ( (chisqrPerDF < 2.0) && (fSwapped == kFALSE) )
1159// {
1160// SwapGeneratingHistograms();
1161// }
1162
1163 }
1164 TFile* filef = TFile::Open("QTBackground.root","recreate");
1165 fQBackground->Write();
1166 fQBackground->SetDirectory(0x0);
1167 filef->Close();
1168 delete filef;
1169
1170 filef = TFile::Open("QTSignal.root","recreate");
1171 fQSignal->Write();
1172 fQSignal->SetDirectory(0x0);
1173 filef->Close();
1174 delete filef;
1175
1176
1177 delete c1;
1178 delete work;
1179
1180 for (Int_t i = 1; i<=fQNBins; i++)
1181 {
1182 for (Int_t k = 1; k<=fQNBins; k++)
1183 {
1184 delete [] chiarray[i][k];
1185 delete [] sigarray[i][k];
1186 }
1187 delete [] chiarray[i];
1188 delete [] sigarray[i];
1189 }
1190 delete [] chiarray;
1191 delete [] sigarray;
1192
1193}
1194/***********************************************************/
1195
1196void AliGenHBTosl::StartSignalPass1()
1197{
1198 //This method makes first part of the initialization of working histograms
1199 //It randomizes qout, qside and qlong from the coarse signal histogram
1200
1201 Bool_t flag = kTRUE;
1202 TParticle particle(fPID,0,-1,-1,-1,-1,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0);
1203 TParticle* second = &particle;
1204 Double_t qout;
1205 Double_t qside;
1206 Double_t qlong;
1207
1208 Info("StartSignalPass1","\n\nFirst Pass\n\n");
1209
1210 while (flag)
1211 {
1212 Info("StartSignalPass1","NextEvent");
1213 AliStack* stack = RotateStack();
1214 AliStack* genstack = fGenerator->GetStack();
1215 genstack->Reset();
1216 fGenerator->Generate();
1217 Int_t j = 0, ntr = 0;
1218 if ( genstack->GetNtrack() < fNpart/2)
1219 {
1220 Warning("StartSignalPass1","**********************************");
1221 Warning("StartSignalPass1","Generator generated (%d) less particles then expected (%d).",
1222 genstack->GetNtrack(),fNpart/2);
1223 Warning("StartSignalPass1","**********************************");
1224 }
1225
1226 Int_t sc = 0;//security check against infinite loop
1227 while ((ntr+1)<fNpart)
1228 {
1229
1230// Info("StartSignal","Number of track on output stack: = %d", ntr);
1231// Info("StartSignal","Number of track on input stack: = %d\n", j);
1232
1233 TParticle* first = 0;
1234 while (j < genstack->GetNtrack())
1235 {
1236 TParticle* tmpp = genstack->Particle(j++);
1237 if (tmpp->GetPdgCode() == fPID)
1238 {
1239 if (CheckParticle(tmpp,0x0,stack) == kFALSE)
1240 {
1241 first = tmpp;
1242 break;
1243 }
1244 else
1245 {
1246 Info("StartSignalPass1","Particle did not pass the safety check 1");
1247 tmpp->Print();
1248 }
1249 }
1250 }
1251
1252 if (first == 0x0)
1253 {
1254 if ( fDebug > 2 ) Info("StartSignalPass1","No more particles of that type");
1255
1256 break;
1257 }
1258
1259 SetTrack(first,ntr,stack);
1260
1261 fQCoarseSignal->GetRandom3(qout,qside,qlong);
1262
1263 Int_t retval = GetThreeD(first,second,qout,qside,qlong);
1264 if (retval)
1265 {
1266 //Info("StartSignal","Can not find momenta for this OSL and particle");
1267 continue;
1268 }
1269 //in case this particle is falling into signal area with another
1270 //particle we take a another pair
1271 //it can intruduce artificial correlations
1272 Bool_t checkresult = CheckParticle(second,first,stack);
1273 if ( checkresult && (sc < 10) )
1274 {
1275 sc++;
1276 Info("StartSignalPass1","Particle did not pass the safety check 2");
1277 second->Print();
1278 continue;
1279 }
1280
1281 sc = 0;
1282
1283 SetTrack(second,ntr,stack);
1284 }
1285
1286 Mix(stack,fQSignal,fQSecondSignal);
1287 Mix(fStackBuffer,fQBackground,fQSecondBackground);
1288
1289 flag = kFALSE;
1290
1291 for (Int_t k = 1; k<=fQNBins; k++)
1292 {
1293 for (Int_t j = 1; j<=fQNBins; j++)
1294 {
1295 for (Int_t i = 1; i<=fQNBins; i++)
1296 {
1297 if ( (fQBackground->GetBinContent(i,j,k) < fMinFill) )
1298 {
1299 //(fQSignal->GetBinContent(i,j,k) < fMinFill) ||
1300 Info("StartSignalPass1","bin (%d,%d,%d): signal=%f background=%f",i,j,k,
1301 fQSignal->GetBinContent(i,j,k),fQBackground->GetBinContent(i,j,k));
1302 flag = kTRUE;//continue while
1303 break;//breakes for not while
1304 }
1305 }
1306 if (flag == kTRUE) break;
1307 }
1308 if (flag == kTRUE) break;
1309 }
1310
1311 }//while (flag)
1312
1313
1314}
1315/***********************************************************/
1316
1317void AliGenHBTosl::FillCoarseSignal()
1318{
1319 //Makes coarse signal by multiplying the coarse background and required function
1320 Info("FillCoarseSignal","START");
1321 for (Int_t k = 1; k <=fQNBins ;k++ )
1322 {
1323 Double_t z = fQCoarseBackground->GetZaxis()->GetBinCenter(k);
1324 for (Int_t j = 1; j <=fQNBins; j++)
1325 {
1326 Double_t y = fQCoarseBackground->GetYaxis()->GetBinCenter(j);
1327 for (Int_t i = 1; i <=fQNBins; i++)
1328 {
1329 Double_t x = fQCoarseBackground->GetXaxis()->GetBinCenter(i);
1330 Double_t v = GetQOutQSideQLongCorrTheorValue(x,y,z);
1331 Info("FillCoarseSignal","Bin (%d,%d,%d): osl(%f,%f,%f)=%f",i,j,k,x,y,z,v);
1332 fQCoarseSignal->SetBinContent(i,j,k,v*fQCoarseBackground->GetBinContent(i,j,k));
1333 }
1334 }
1335 }
1336
1337 //if (AliDebugLevel())
1338 TestCoarseSignal();
1339
1340 Info("FillCoarseSignal","DONE");
1341}
1342/***********************************************************/
1343
1344void AliGenHBTosl::FillCoarse()
1345{
1346 //creates the statistical background histogram on the base of input from
1347 //fGenerator
1348 Info("FillCoarse","START");
1349
1350 AliStack* stack;
1351 Int_t niter = 0;
1352
1353 Bool_t cont;
1354 TH3D tmph("tmph","tmph",2,0,1,2,0,1,2,0,1);
1355 printf("\n");
1356
1357 do
1358 {
1359// if (niter > 20) break;
1360
1361 cout<<niter++<<" bincont "<<fQCoarseBackground->GetBinContent(30,30,28)
1362 <<" "<<fQCoarseBackground->GetBinContent(30,30,29)
1363 <<" "<<fQCoarseBackground->GetBinContent(30,30,30)
1364 <<" "<<fQCoarseBackground->GetBinContent(30,30,31)
1365 <<" "<<fQCoarseBackground->GetBinContent(30,30,32)
1366 <<"\n";
1367 fflush(0);
1368
1369 stack = RotateStack();
1370 fGenerator->SetStack(stack);
1371 fGenerator->Init();
1372 fGenerator->Generate();
1373
1374 Mix(fStackBuffer,fQCoarseBackground,&tmph);
1375
1376 cont = kFALSE;
1377
1378 Info("FillCoarse","fMinFill = %d",fMinFill);
1379 for (Int_t k = 1; k<=fQNBins; k++)
1380 {
1381 for (Int_t j = 1; j<=fQNBins; j++)
1382 {
1383 for (Int_t i = 1; i<=fQNBins; i++)
1384 {
1385 if ( fQCoarseBackground->GetBinContent(i,j,k) < fMinFill )
1386 {
1387 cont = kTRUE;
1388 Info("FillCoarse","bin (%d,%d,%d)=%f",i,j,k,fQCoarseBackground->GetBinContent(i,j,k));
1389 break;
1390 }
1391
1392 }
1393 if (cont) break;
1394 }
1395 if (cont) break;
1396 }
1397 }while(cont);
1398
1399 printf("\n");
1400 fGenerator->SetStack(0x0);
1401 Info("FillCoarse","DONE");
1402
1403}
1404/***********************************************************/
1405
1406void AliGenHBTosl::Mix(TList* eventbuffer,TH3D* denominator,TH3D* denominator2)
1407{
1408 //Fills denominators
1409 //Mixes events stored in the eventbuffer and fills the background histograms
1410 static TStopwatch stoper;
1411
1412 if (eventbuffer == 0x0)
1413 {
1414 Error("Mix","Buffer List is null.");
1415 return;
1416 }
1417
1418 if (denominator == 0x0)
1419 {
1420 Error("Mix","Denominator histogram is null.");
1421 return;
1422 }
1423
1424 if (denominator2 == 0x0)
1425 {
1426 Error("Mix","Denominator2 histogram is null.");
1427 return;
1428 }
1429
1430 Info("Mix","%s",denominator->GetName());
1431 stoper.Start();
1432
1433 TIter next(eventbuffer);
1434 AliStack* firstevent;
1435 AliStack* secondevent = 0x0;
1436
1437 while(( firstevent=(AliStack*)next() ))
1438 {
1439 if (secondevent == 0x0)
1440 {
1441 secondevent = firstevent;
1442 continue;
1443 }
1444// Info("Mix","Mixing %#x with %#x",firstevent,secondevent);
1445 for(Int_t j = 0; j < firstevent->GetNtrack(); j++ )
1446 {
1447 TParticle* firstpart = firstevent->Particle(j);
1448
1449 Float_t phi = firstpart->Phi();
1450 if ( (phi < fSamplePhiMin) || ( phi > fSamplePhiMax)) continue;
1451
1452// Info("Mix","Mixing %d phi %f min %f max %f",j,phi,fSamplePhiMin,fSamplePhiMax);
1453
1454 for(Int_t i = 0; i < secondevent->GetNtrack(); i++ )
1455 {
1456 TParticle* secondpart = secondevent->Particle(i);
1457 phi = secondpart->Phi();
1458 if ( (phi < fSamplePhiMin) || ( phi > fSamplePhiMax)) continue;
1459
1460 Double_t qout;
1461 Double_t qside;
1462 Double_t qlong;
1463 GetQOutQSideQLong(firstpart,secondpart,qout,qside,qlong);
1464 denominator->Fill(qout,qside,qlong);
1465 denominator2->Fill(qout,qside,qlong);
1466 }
1467 }
1468
1469 secondevent = firstevent;
1470 }
1471 stoper.Stop();
1472 stoper.Print();
1473
1474}
1475/***********************************************************/
1476
1477void AliGenHBTosl::Mix(AliStack* stack, TH3D* numerator, TH3D* numerator2)
1478{
1479//fils numerator with particles from stack
1480 static TStopwatch stoper;
1481 if (stack == 0x0)
1482 {
1483 Error("Mix","Stack is null.");
1484 return;
1485 }
1486
1487 if ( (numerator == 0x0) || (numerator2 == 0x0) )
1488 {
1489 Error("Mix","Numerator histogram is null.");
1490 return;
1491 }
1492
1493 Info("Mix","%s",numerator->GetName());
1494 stoper.Start();
1495
1496 for(Int_t j = 0; j < stack->GetNtrack(); j++ )
1497 {
1498 TParticle* firstpart = stack->Particle(j);
1499 Float_t phi = firstpart->Phi();
1500 if ( (phi < fSamplePhiMin) || ( phi > fSamplePhiMax)) continue;
1501
1502 for(Int_t i = j+1; i < stack->GetNtrack(); i++ )
1503 {
1504 TParticle* secondpart = stack->Particle(i);
1505 phi = secondpart->Phi();
1506 if ( (phi < fSamplePhiMin) || ( phi > fSamplePhiMax)) continue;
1507 Double_t qout;
1508 Double_t qside;
1509 Double_t qlong;
1510 GetQOutQSideQLong(firstpart,secondpart,qout,qside,qlong);
1511 numerator->Fill(qout,qside,qlong);
1512 numerator2->Fill(qout,qside,qlong);
1513 }
1514 }
1515 stoper.Stop();
1516 stoper.Print();
1517
1518}
1519/***********************************************************/
1520
1521Double_t AliGenHBTosl::GetQInv(TParticle* f, TParticle* s)
1522{
1523//calculates qinv
1524// cout<<f->Px()<<" "<<s->Px()<<endl;
1525 Double_t pxdiff = f->Px() - s->Px();
1526 Double_t pydiff = f->Py() - s->Py();
1527 Double_t pzdiff = f->Pz() - s->Pz();
1528 Double_t ediff = f->Energy() - s->Energy();
1529
1530 Double_t qinvl = ediff*ediff - ( pxdiff*pxdiff + pydiff*pydiff + pzdiff*pzdiff );
1531 Double_t qinv = TMath::Sqrt(TMath::Abs(qinvl));
1532 return qinv;
1533}
1534/***********************************************************/
1535
1536void AliGenHBTosl::GetQOutQSideQLong(TParticle* f, TParticle* s,Double_t& out, Double_t& side, Double_t& lon)
1537{
1538 //returns qout,qside and qlong of the pair of particles
1539 out = side = lon = 10e5;
1540
1541 Double_t pxsum = f->Px() + s->Px();
1542 Double_t pysum = f->Py() + s->Py();
1543 Double_t pzsum = f->Pz() + s->Pz();
1544 Double_t esum = f->Energy() + s->Energy();
1545 Double_t pxdiff = f->Px() - s->Px();
1546 Double_t pydiff = f->Py() - s->Py();
1547 Double_t pzdiff = f->Pz() - s->Pz();
1548 Double_t ediff = f->Energy() - s->Energy();
1549 Double_t kt = 0.5*TMath::Hypot(pxsum,pysum);
1550
1551 Double_t k2 = pxsum*pxdiff+pysum*pydiff;
1552
1553 if (kt == 0.0)
1554 {
1555 f->Print();
1556 s->Print();
1557 kt = 10e5;
1558 }
1559 else
1560 {
1561 out = 0.5*k2/kt;
1562 side = (f->Px()*s->Py()-s->Px()*f->Py())/kt;
1563 }
1564
1565 Double_t beta = pzsum/esum;
1566 Double_t gamma = 1.0/TMath::Sqrt(1.0 - beta*beta);
1567
1568 lon = gamma * ( pzdiff - beta*ediff );
1569
1570// out = TMath::Abs(out);
1571// side = TMath::Abs(side);
1572// lon = TMath::Abs(lon);
1573}
1574
1575/***********************************************************/
1576
1577Double_t AliGenHBTosl::Scale(TH3D* num, TH3D* den)
1578{
1579 //Calculates the factor that should be used to scale
1580 //quatience of num and den to 1 at tail
1581
1582 AliDebug(1,"Entered");
1583 if(!num)
1584 {
1585 AliError("No numerator");
1586 return 0.0;
1587 }
1588 if(!den)
1589 {
1590 AliError("No denominator");
1591 return 0.0;
1592 }
1593
1594 if(fNBinsToScale < 1)
1595 {
1596 AliError("Number of bins for scaling is smaller than 1");
1597 return 0.0;
1598 }
1599 Int_t fNBinsToScaleX = fNBinsToScale;
1600 Int_t fNBinsToScaleY = fNBinsToScale;
1601 Int_t fNBinsToScaleZ = fNBinsToScale;
1602
1603 Int_t nbinsX = num->GetNbinsX();
1604 if (fNBinsToScaleX > nbinsX)
1605 {
1606 AliError("Number of X bins for scaling is bigger thnan number of bins in histograms");
1607 return 0.0;
1608 }
1609
1610 Int_t nbinsY = num->GetNbinsX();
1611 if (fNBinsToScaleY > nbinsY)
1612 {
1613 AliError("Number of Y bins for scaling is bigger thnan number of bins in histograms");
1614 return 0.0;
1615 }
1616
1617 Int_t nbinsZ = num->GetNbinsZ();
1618 if (fNBinsToScaleZ > nbinsZ)
1619 {
1620 AliError("Number of Z bins for scaling is bigger thnan number of bins in histograms");
1621 return 0.0;
1622 }
1623
1624 AliDebug(1,"No errors detected");
1625
1626 Int_t offsetX = nbinsX - fNBinsToScaleX - 1; //bin that we start loop over bins in axis X
1627 Int_t offsetY = nbinsY - fNBinsToScaleY - 1; //bin that we start loop over bins in axis Y
1628 Int_t offsetZ = nbinsZ - fNBinsToScaleZ - 1; //bin that we start loop over bins in axis Z
1629
1630 Double_t densum = 0.0;
1631 Double_t numsum = 0.0;
1632
1633 for (Int_t k = offsetZ; k<nbinsZ; k++)
1634 for (Int_t j = offsetY; j<nbinsY; j++)
1635 for (Int_t i = offsetX; i<nbinsX; i++)
1636 {
1637 if ( num->GetBinContent(i,j,k) > 0.0 )
1638 {
1639
1640 densum += den->GetBinContent(i,j,k);
1641 numsum += num->GetBinContent(i,j,k);
1642 }
1643 }
1644
1645 AliDebug(1,Form("numsum=%f densum=%f fNBinsToScaleX=%d fNBinsToScaleY=%d fNBinsToScaleZ=%d",
1646 numsum,densum,fNBinsToScaleX,fNBinsToScaleY,fNBinsToScaleZ));
1647
1648 if (numsum == 0) return 0.0;
1649 Double_t ret = densum/numsum;
1650
1651 AliDebug(1,Form("returning %f",ret));
1652 return ret;
1653
1654}
1655/***********************************************************/
1656
1657void AliGenHBTosl::TestCoarseSignal()
1658{
1659//Tests how works filling from generated histogram shape
1660 TH3D* work = new TH3D("work","work",fQNBins,-fQRange,fQRange,fQNBins,-fQRange,fQRange,fQNBins,-fQRange,fQRange);
1661
1662// for (Int_t i = 0; i < fQCoarseBackground->GetEntries() ;i++)
1663// {
1664// Double_t x,y,z;
1665// fQCoarseSignal->GetRandom3(x,y,z);
1666// work->Fill(x,y,z);
1667// }
1668
1669 TCanvas* c1 = new TCanvas();
1670 c1->cd();
1671 work->Draw();
1672 c1->SaveAs("QTwork.root");
1673 TFile* file = TFile::Open("QTwork.root","update");
1674// work->Write();
1675 work->SetDirectory(0x0);
1676 file->Close();
1677
1678 fQCoarseSignal->Draw();
1679 c1->SaveAs("QTCoarseSignal.root");
1680 file = TFile::Open("QTCoarseSignal.root","update");
1681 fQCoarseSignal->Write();
1682 fQCoarseSignal->SetDirectory(0x0);
1683 file->Close();
1684
1685 fQCoarseBackground->Draw();
1686 c1->SaveAs("QTCoarseBackground.root");
1687 file = TFile::Open("QTCoarseBackground.root","update");
1688 fQCoarseBackground->Write();
1689 fQCoarseBackground->SetDirectory(0x0);
1690 file->Close();
1691
1692 TH1 *result = (TH1*)fQCoarseBackground->Clone("ratio");
1693 result->SetTitle("ratio");
1694 Float_t normfactor = Scale(work,fQCoarseBackground);
1695 result->Divide(work,fQCoarseBackground,normfactor);//work
1696
1697
1698 c1->cd();
1699 result->Draw();
1700 c1->SaveAs("QTresult.root");
1701 file = TFile::Open("QTresult.root","update");
1702 result->Write();
1703 result->SetDirectory(0x0);
1704 file->Close();
1705
1706 delete work;
1707 delete c1;
1708}
1709/***********************************************************/
1710
1711void AliGenHBTosl::SetTrack(TParticle* p, Int_t& ntr)
1712{
1713//Shortcut to PushTrack(bla,bla,bla,bla.............)
1714 if (p->P() == 0.0)
1715 {
1716 Error("SetTrack(TParticle*,Int_t&)","Particle has zero momentum");
1717 return;
1718 }
1719
1720
1721 Int_t pdg = p->GetPdgCode();
1722 Double_t px = p->Px();
1723 Double_t py = p->Py();
1724 Double_t pz = p->Pz();
1725 Double_t e = p->Energy();
1726 Double_t vx = p->Vx();
1727 Double_t vy = p->Vy();
1728 Double_t vz = p->Vz();
1729 Double_t tof = p->T();
1730
1731 TVector3 pol;
1732 p->GetPolarisation(pol);
1733
1734 Double_t polx = pol.X();
1735 Double_t poly = pol.Y();
1736 Double_t polz = pol.Z();
1737 TMCProcess mech = AliGenCocktailAfterBurner::IntToMCProcess(p->GetUniqueID());
1738 Float_t weight = p->GetWeight();
1739
1740 AliGenerator::PushTrack(fTrackIt, -1, pdg, px, py, pz, e, vx, vy, vz, tof,polx, poly, polz, mech, ntr, weight);
1741}
1742/***********************************************************/
1743
1744void AliGenHBTosl::SetTrack(TParticle* p, Int_t& ntr, AliStack* stack) const
1745{
1746//Shortcut to SetTrack(bla,bla,bla,bla.............)
1747 if (p->P() == 0.0)
1748 {
1749 Error("SetTrack(TParticle*,Int_t&,AliStack*)","Particle has zero momentum");
1750 return;
1751 }
1752
1753 Int_t pdg = p->GetPdgCode();
1754 Double_t px = p->Px();
1755 Double_t py = p->Py();
1756 Double_t pz = p->Pz();
1757 Double_t e = p->Energy();
1758
1759 stack->PushTrack(fTrackIt, -1, pdg, px, py, pz, e, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, kPPrimary, ntr,1,0);
1760}
1761/***********************************************************/
1762
1763void AliGenHBTosl::Rotate(TVector3& relvector, TVector3& vector)
1764{
1765//This method rotates vector about the angeles that are needed to rotate
1766//relvector from postion (firstPx,0,0) to its actual positon
1767//In other words: To make equations easier
1768
1769 static TVector3 first;
1770 if (AliDebugLevel()>=1)
1771 {
1772 first.SetXYZ(relvector.x(),relvector.y(),relvector.z());
1773 }
1774
1775 Double_t firstPx = TMath::Sqrt( relvector.x()*relvector.x() +
1776 relvector.y()*relvector.y() +
1777 relvector.z()*relvector.z() );
1778
1779 Double_t rotAngleZ = -TMath::ATan2(relvector.y(),relvector.x());//calculating rot angles
1780 relvector.RotateZ(rotAngleZ);
1781 rotAngleZ = -rotAngleZ;
1782 Double_t rotAngleY = -TMath::ATan2(relvector.z(),relvector.x());
1783
1784 vector.RotateY(rotAngleY);
1785 vector.RotateZ(rotAngleZ);
1786
1787 if (AliDebugLevel()>5)
1788 {
1789 TVector3 test(firstPx,0.0,0.0);
1790 test.RotateY(rotAngleY);
1791 test.RotateZ(rotAngleZ);
1792 AliInfo(Form("Rotation test: px %f %f",first.x(),test.x()));
1793 AliInfo(Form("Rotation test: py %f %f",first.y(),test.y()));
1794 AliInfo(Form("Rotation test: pz %f %f",first.z(),test.z()));
1795 }
1796}
1797/***********************************************************/
1798
1799Double_t AliGenHBTosl::Rotate(Double_t x,Double_t y,Double_t z)
1800{
1801//Rotates vector to base where only x - coordinate is no-zero, and returns that
1802
1803 Double_t xylength = TMath::Hypot(x,y);
1804 Double_t sinphi = -y/xylength;
1805 Double_t cosphi = x/xylength;
1806
1807 Double_t xprime = cosphi*x - sinphi*y;
1808 Double_t yprime = sinphi*x + cosphi*y;
1809
1810 TVector3 v(x,y,z);
1811 Double_t a1 = -TMath::ATan2(v.Y(),v.X());
1812
1813 if (AliDebugLevel()>5)
1814 {
1815 AliInfo(Form("Xpr = %f Ypr = %f",xprime,yprime));
1816 AliInfo(Form("Calc sin = %f, and %f",sinphi,TMath::Sin(a1)));
1817 AliInfo(Form("Calc cos = %f, and %f",cosphi,TMath::Cos(a1)));
1818 }
1819
1820 Double_t xprimezlength = TMath::Hypot(xprime,z);
1821
1822 Double_t sintheta = z/xprimezlength;
1823 Double_t costheta = xprime/xprimezlength;
1824
1825
1826 Double_t xbis = sintheta*z + costheta*(cosphi*x - sinphi*y);
1827
1828 AliInfo(Form("Calculated rot %f, modulus %f",xbis,TMath::Sqrt(x*x+y*y+z*z)));
1829 return xbis;
1830}
1831/***********************************************************/
1832
1833AliStack* AliGenHBTosl::RotateStack()
1834{
1835//swaps to next stack last goes to first and is reseted
1836
1837 AliStack* stack;
1838 if ( fStackBuffer->GetSize() >= fBufferSize )
1839 {
1840 stack = (AliStack*)fStackBuffer->Remove(fStackBuffer->Last());
1841 }
1842 else
1843 {
1844 stack = new AliStack(fNpart);
1845 }
1846
1847 fStackBuffer->AddFirst(stack);
1848 stack->Reset();
1849 return stack;
1850}
1851/***********************************************************/
1852
1853Double_t AliGenHBTosl::GetQInvCorrTheorValue(Double_t qinv) const
1854{
1855//Function (deprecated)
1856 static const Double_t kFactorsqrd = 0.197*0.197;//squared conversion factor SI<->eV
1857
1858 return 1.0 + 0.5*TMath::Exp(-qinv*qinv*fQRadius*fQRadius/kFactorsqrd);
1859}
1860/***********************************************************/
1861
1862Double_t AliGenHBTosl::GetQOutQSideQLongCorrTheorValue(Double_t& out, Double_t& side, Double_t& lon) const
1863{
1864 //Theoretical function. Wa want to get correlation of the shape of this function
1865 static const Double_t kFactorsqrd = 0.197*0.197;//squared conversion factor SI<->eV
1866 return 1.0 + 0.7*TMath::Exp(-fQRadius*fQRadius*(out*out+side*side+lon*lon)/kFactorsqrd);
1867}
1868/***********************************************************/
1869
1870Bool_t AliGenHBTosl::CheckParticle(TParticle* p, TParticle* aupair ,AliStack* stack)
1871{
1872 //Checks if a given particle is falling into signal region with any other particle
1873 //already existing on stack
1874 //PH return kFALSE;
1875
1876 if (fSignalRegion <=0) return kFALSE;
1877
1878 for (Int_t i = 0; i < stack->GetNtrack(); i++)
1879 {
1880 TParticle* part = stack->Particle(i);
1881 if (part == aupair) continue;
1882 Double_t qout = 10e5;
1883 Double_t qside= 10e5;
1884 Double_t qlong= 10e5;
1885 GetQOutQSideQLong(p,part,qout,qside,qlong);
1886
1887 if (TMath::Abs(qout) < fSignalRegion)
1888 if (TMath::Abs(qside) < fSignalRegion)
1889 if (TMath::Abs(qlong) < fSignalRegion)
1890 return kTRUE;
1891 }
1892 return kFALSE;
1893}
1894/***********************************************************/
1895
1896void AliGenHBTosl::SwapGeneratingHistograms()
1897{
1898 //Checks if it is time to swap signal and background histograms
1899 //if yes it swaps them
1900 Int_t threshold = fMinFill;
1901 for (Int_t k = 1; k<=fQNBins; k++)
1902 {
1903 for (Int_t j = 1; j<=fQNBins; j++)
1904 {
1905 for (Int_t i = 1; i<=fQNBins; i++)
1906 {
1907 if ( fQSecondBackground->GetBinContent(i,j,k) < threshold) return;
1908 }
1909 }
1910
1911 }
1912
1913
1914 Info("SwapGeneratingHistograms","*******************************************");
1915 Info("SwapGeneratingHistograms","*******************************************");
1916 Info("SwapGeneratingHistograms","*******************************************");
1917 Info("SwapGeneratingHistograms","**** SWAPPING HISTOGRAMS ****");
1918 Info("SwapGeneratingHistograms","*******************************************");
1919 Info("SwapGeneratingHistograms","*******************************************");
1920 Info("SwapGeneratingHistograms","*******************************************");
1921
1922
1923 TH3D* h = fQSignal;
1924 fQSignal = fQSecondSignal;
1925 fQSecondSignal = h;
1926 fQSecondSignal->Reset();
1927 fQSecondSignal->SetDirectory(0x0);
1928
1929 h = fQBackground;
1930 fQBackground = fQSecondBackground;
1931 fQSecondBackground = h;
1932 fQSecondBackground->Reset();
1933 fQSecondBackground->SetDirectory(0x0);
1934
1935 fSwapped = kTRUE;
1936
1937}
1938
1939AliGenHBTosl& AliGenHBTosl::operator=(const AliGenHBTosl& rhs)
1940{
1941// Assignment operator
1942 rhs.Copy(*this);
1943 return *this;
1944}
1945
1946void AliGenHBTosl::Copy(TObject&) const
1947{
1948 //
1949 // Copy
1950 //
1951 Fatal("Copy","Not implemented!\n");
1952}
1953
1954