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f1d945a1 | 1 | /************************************************************************* |
2 | * Copyright(c) 1998-2008, 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 | /* | |
17 | $Log$ | |
18 | */ | |
19 | ||
20 | //#define AliFlowAnalysisWithLYZEventPlane_cxx | |
21 | ||
22 | #include "Riostream.h" //needed as include | |
23 | ||
24 | #include "TFile.h" | |
25 | #include "TComplex.h" //needed as include | |
26 | #include "TCanvas.h" //needed as include | |
27 | #include "TLegend.h" //needed as include | |
28 | #include "TProfile.h" //needed as include | |
29 | ||
30 | class TH1F; | |
31 | ||
32 | #include "AliFlowLYZConstants.h" //needed as include | |
33 | #include "AliFlowCommonConstants.h" //needed as include | |
34 | #include "AliFlowEventSimple.h" | |
35 | #include "AliFlowTrackSimple.h" | |
36 | #include "AliFlowCommonHist.h" | |
37 | #include "AliFlowCommonHistResults.h" | |
38 | #include "AliFlowLYZEventPlane.h" | |
39 | #include "AliFlowAnalysisWithLYZEventPlane.h" | |
40 | ||
41 | class AliFlowVector; | |
42 | ||
43 | // AliFlowAnalysisWithLYZEventPlane: | |
44 | // | |
45 | // Class to do flow analysis with the event plane from the LYZ method | |
46 | // | |
47 | // author: N. van der Kolk (kolk@nikhef.nl) | |
48 | ||
49 | ||
50 | ClassImp(AliFlowAnalysisWithLYZEventPlane) | |
51 | ||
52 | //----------------------------------------------------------------------- | |
53 | ||
54 | AliFlowAnalysisWithLYZEventPlane::AliFlowAnalysisWithLYZEventPlane(): | |
0092f3c2 | 55 | fOutFile(0), |
56 | fFirstRunFile(0), | |
57 | fSecondRunFile(0), | |
58 | fFirstRunFileName(0), | |
59 | fSecondRunFileName(0), | |
60 | fOutFileName(0), | |
61 | fSecondReDtheta(0), | |
62 | fSecondImDtheta(0), | |
63 | fFirstr0theta(0), | |
64 | fSecondVPt(0), | |
65 | fHistProFlow(0), | |
66 | fHistProFlow2(0), | |
67 | fHistProWr(0), | |
68 | fHistProWrCorr(0), | |
69 | fHistFlow(0), | |
70 | fHistDeltaPhi(0), | |
71 | fHistDeltaPhi2(0), | |
72 | fHistDeltaPhihere(0), | |
73 | fHistPhiEP(0), | |
74 | fHistPhiEPhere(0), | |
75 | fHistPhiLYZ(0), | |
76 | fHistPhiLYZ2(0), | |
77 | fHistProR0theta(0), | |
78 | fHistProReDtheta(0), | |
79 | fHistProImDtheta(0), | |
80 | fCommonHists(0), | |
81 | fCommonHistsRes(0), | |
82 | fEventNumber(0), | |
83 | fQ(NULL), | |
84 | fQsum(NULL), | |
85 | fQ2sum(0), | |
86 | fQtheta(0), | |
87 | fTrack(NULL), | |
88 | fLYZEP(NULL) | |
f1d945a1 | 89 | { |
90 | ||
91 | // Constructor. | |
0092f3c2 | 92 | // fQ.Set(0.,0.); // flow vector |
93 | // fQsum.Set(0.,0.); // flow vector sum | |
94 | fQ = new AliFlowVector(); // flow vector | |
95 | fQsum = new TVector2(); // flow vector sum | |
f1d945a1 | 96 | fLYZEP = new AliFlowLYZEventPlane(); |
97 | } | |
98 | ||
99 | ||
100 | ||
101 | //----------------------------------------------------------------------- | |
102 | ||
103 | ||
104 | AliFlowAnalysisWithLYZEventPlane::~AliFlowAnalysisWithLYZEventPlane() | |
105 | { | |
106 | //destructor | |
0092f3c2 | 107 | delete fQ; |
108 | delete fQsum; | |
f1d945a1 | 109 | delete fLYZEP; |
110 | } | |
111 | ||
112 | ||
113 | //----------------------------------------------------------------------- | |
114 | void AliFlowAnalysisWithLYZEventPlane::Init() { | |
115 | ||
116 | //Initialise all histograms | |
117 | cout<<"---Analysis with Lee Yang Zeros Event Plane Method---"<<endl; | |
118 | ||
119 | //input histograms | |
120 | if (fSecondRunFile->IsZombie()){ //check if file exists | |
121 | cout << "Error opening file, run first with fFirstrun = kTRUE" << endl; | |
122 | exit(-1); | |
123 | } else if (fSecondRunFile->IsOpen()){ | |
124 | cout<<"----secondRunFile is open----"<<endl; | |
125 | fSecondVPt = (TProfile*)fSecondRunFile->Get("Flow_Differential_Pt_LYZ"); //to compare to | |
126 | } | |
127 | ||
128 | if (fFirstRunFile->IsZombie()){ //check if file exists | |
129 | cout << "Error opening file, run first with fFirstrun = kTRUE" << endl; | |
130 | exit(-1); | |
131 | } else if (fFirstRunFile->IsOpen()){ | |
132 | cout<<"----firstRunFile is open----"<<endl<<endl; | |
133 | fFirstr0theta = (TProfile*)fFirstRunFile->Get("First_FlowPro_r0theta_LYZ"); | |
134 | } | |
135 | ||
136 | ||
137 | //output file | |
138 | // ********make output file | |
139 | // analysis file (output) | |
140 | fOutFile = new TFile(fOutFileName.Data(),"RECREATE") ; | |
141 | ||
142 | fCommonHists = new AliFlowCommonHist("LYZEP"); | |
143 | fCommonHistsRes = new AliFlowCommonHistResults("LYZEP"); | |
144 | ||
145 | // output histograms | |
146 | Int_t fNtheta = AliFlowLYZConstants::kTheta; | |
147 | Int_t fNbinsPt = AliFlowCommonConstants::GetNbinsPt(); | |
148 | Double_t fPtMin = AliFlowCommonConstants::GetPtMin(); | |
149 | Double_t fPtMax = AliFlowCommonConstants::GetPtMax(); | |
150 | ||
151 | ||
152 | fHistProFlow = new TProfile("FlowPro_VPt_LYZEP","FlowPro_VPt_LYZEP",fNbinsPt,fPtMin,fPtMax); | |
153 | fHistProFlow->SetXTitle("Pt"); | |
154 | fHistProFlow->SetYTitle("v2 (%)"); | |
155 | ||
156 | fHistProWr = new TProfile("FlowPro_Wr_LYZEP","FlowPro_Wr_LYZEP",100,0.,0.25); | |
157 | fHistProWr->SetXTitle("Q"); | |
158 | fHistProWr->SetYTitle("Wr"); | |
159 | ||
160 | fHistDeltaPhi = new TH1F("Flow_DeltaPhi_LYZEP","Flow_DeltaPhi_LYZEP",100,0.,3.14); | |
161 | fHistDeltaPhi->SetXTitle("DeltaPhi"); | |
162 | fHistDeltaPhi->SetYTitle("Counts"); | |
163 | ||
164 | fHistPhiLYZ = new TH1F("Flow_PhiLYZ_LYZEP","Flow_PhiLYZ_LYZEP",100,0.,3.14); | |
165 | fHistPhiLYZ->SetXTitle("Phi from LYZ"); | |
166 | fHistPhiLYZ->SetYTitle("Counts"); | |
167 | ||
168 | fHistPhiEP = new TH1F("Flow_PhiEP_LYZEP","Flow_PhiEP_LYZEP",100,0.,3.14); | |
169 | fHistPhiEP->SetXTitle("Phi from EP"); | |
170 | fHistPhiEP->SetYTitle("Counts"); | |
171 | ||
172 | ||
173 | fHistProR0theta = new TProfile("FlowPro_r0theta_LYZEP","FlowPro_r0theta_LYZEP",fNtheta,-0.5,fNtheta-0.5); | |
174 | fHistProR0theta->SetXTitle("#theta"); | |
175 | fHistProR0theta->SetYTitle("r_{0}^{#theta}"); | |
176 | ||
177 | fHistProReDtheta = new TProfile("FlowPro_ReDtheta_LYZEP","FlowPro_ReDtheta_LYZEP",fNtheta, -0.5, fNtheta-0.5); | |
178 | fHistProReDtheta->SetXTitle("#theta"); | |
179 | fHistProReDtheta->SetYTitle("Re(D^{#theta})"); | |
180 | ||
181 | fHistProImDtheta = new TProfile("FlowPro_ImDtheta_LYZEP","FlowPro_ImDtheta_LYZEP",fNtheta, -0.5, fNtheta-0.5); | |
182 | fHistProImDtheta->SetXTitle("#theta"); | |
183 | fHistProImDtheta->SetYTitle("Im(D^{#theta})"); | |
184 | ||
185 | fEventNumber = 0; //set number of events to zero | |
186 | ||
187 | ||
188 | } | |
189 | ||
190 | //----------------------------------------------------------------------- | |
191 | ||
8232a5ec | 192 | void AliFlowAnalysisWithLYZEventPlane::Make(AliFlowEventSimple* anEvent, AliFlowLYZEventPlane* fLYZEP) { |
193 | //void AliFlowAnalysisWithLYZEventPlane::Make(AliFlowEventSimple* anEvent) { | |
f1d945a1 | 194 | |
195 | //Get the event plane and weight for each event | |
8232a5ec | 196 | if (anEvent) { |
f1d945a1 | 197 | |
198 | //fill control histograms | |
8232a5ec | 199 | fCommonHists->FillControlHistograms(anEvent); |
f1d945a1 | 200 | |
201 | //get the Q vector from the FlowEvent | |
0092f3c2 | 202 | *fQ = anEvent->GetQ(); |
f1d945a1 | 203 | //Weight with the multiplicity |
7d1e46b8 | 204 | Double_t fQX = 0.; |
205 | Double_t fQY = 0.; | |
0092f3c2 | 206 | if (fQ->GetMult()!=0.) { |
207 | fQX = fQ->X()/fQ->GetMult(); | |
208 | fQY = fQ->Y()/fQ->GetMult(); | |
209 | } else {cerr<<"fQ->GetMult() is zero!"<<endl; } | |
210 | fQ->Set(fQX,fQY); | |
211 | //cout<<"fQ->Mod() = " << fQ->Mod() << endl; | |
f1d945a1 | 212 | //for chi calculation: |
0092f3c2 | 213 | *fQsum += *fQ; |
f1d945a1 | 214 | //cout<<"fQsum.Mod() = "<<fQsum.Mod()<<endl; |
0092f3c2 | 215 | fQ2sum += fQ->Mod2(); |
f1d945a1 | 216 | cout<<"fQ2sum = "<<fQ2sum<<endl; |
217 | ||
218 | //call AliFlowLYZEventPlane::CalculateRPandW() here! | |
0092f3c2 | 219 | fLYZEP->CalculateRPandW(*fQ); |
f1d945a1 | 220 | |
221 | Double_t fWR = fLYZEP->GetWR(); | |
222 | Double_t fRP = fLYZEP->GetPsi(); | |
223 | ||
224 | //fHistProWr->Fill(fQ.Mod(),fWR); //this weight is always positive | |
225 | fHistPhiLYZ->Fill(fRP); | |
226 | ||
227 | //plot difference between event plane from EP-method and LYZ-method | |
0092f3c2 | 228 | Double_t fRPEP = fQ->Phi()/2; //gives distribution from (0 to pi) |
f1d945a1 | 229 | //Float_t fRPEP = 0.5*TMath::ATan2(fQ.Y(),fQ.X()); //gives distribution from (-pi/2 to pi/2) |
230 | //cout<<"fRPEP = "<< fRPEP <<endl; | |
231 | fHistPhiEP->Fill(fRPEP); | |
232 | ||
233 | Double_t fDeltaPhi = fRPEP - fRP; | |
234 | if (fDeltaPhi < 0.) { fDeltaPhi += TMath::Pi(); } //to shift distribution from (-pi/2 to pi/2) to (0 to pi) | |
235 | //cout<<"fDeltaPhi = "<<fDeltaPhi<<endl; | |
236 | fHistDeltaPhi->Fill(fDeltaPhi); | |
237 | ||
238 | //Flip sign of WR | |
239 | Double_t low = TMath::Pi()/4.; | |
240 | Double_t high = 3.*(TMath::Pi()/4.); | |
241 | if ((fDeltaPhi > low) && (fDeltaPhi < high)){ | |
242 | fRP -= (TMath::Pi()/2); | |
243 | fWR = -fWR; | |
244 | cerr<<"*** fRP modified ***"<<endl; | |
245 | } | |
0092f3c2 | 246 | fHistProWr->Fill(fQ->Mod(),fWR); //corrected weight |
f1d945a1 | 247 | |
248 | //calculate flow | |
249 | //loop over the tracks of the event | |
8232a5ec | 250 | Int_t fNumberOfTracks = anEvent->NumberOfTracks(); |
f1d945a1 | 251 | for (Int_t i=0;i<fNumberOfTracks;i++) |
252 | { | |
8232a5ec | 253 | fTrack = anEvent->GetTrack(i) ; |
f1d945a1 | 254 | if (fTrack){ |
255 | if (fTrack->UseForDifferentialFlow()) { | |
256 | Double_t fPhi = fTrack->Phi(); | |
257 | //if (fPhi<0.) fPhi+=2*TMath::Pi(); | |
258 | //calculate flow v2: | |
259 | Double_t fv2 = fWR * TMath::Cos(2*(fPhi-fRP)); | |
260 | Double_t fPt = fTrack->Pt(); | |
261 | //fill histogram | |
262 | fHistProFlow->Fill(fPt,100*fv2); | |
263 | } | |
264 | }//track selected | |
265 | }//loop over tracks | |
266 | ||
267 | fEventNumber++; | |
268 | cout<<"@@@@@ "<<fEventNumber<<" events processed"<<endl; | |
269 | } | |
270 | } | |
271 | ||
272 | //-------------------------------------------------------------------- | |
273 | void AliFlowAnalysisWithLYZEventPlane::Finish() { | |
274 | ||
275 | //plot histograms etc. | |
276 | cout<<"AliFlowAnalysisWithLYZEventPlane::Terminate()"<<endl; | |
277 | //constands: | |
278 | Double_t fJ01 = 2.405; | |
279 | Int_t fNtheta = AliFlowLYZConstants::kTheta; | |
280 | Int_t fNbinsPt = AliFlowCommonConstants::GetNbinsPt(); | |
281 | //Double_t fErr2difcomb = 0.; | |
282 | //Double_t fErrdifcomb = 0.; | |
283 | ||
284 | //calculate fV the mean of fVtheta | |
285 | Double_t fVtheta = 0; | |
286 | Double_t fV = 0; | |
287 | for (Int_t theta=0;theta<fNtheta;theta++) { | |
288 | Double_t fR0 = fFirstr0theta->GetBinContent(theta+1); | |
289 | if (fR0!=0.) { fVtheta = fJ01/fR0 ;} | |
290 | fV += fVtheta; | |
291 | } | |
292 | fV /= fNtheta; | |
293 | ||
294 | //calculate fChi | |
295 | Double_t fSigma2 = 0; | |
296 | Double_t fChi= 0; | |
297 | if (fEventNumber!=0) { | |
0092f3c2 | 298 | *fQsum /= fEventNumber; |
f1d945a1 | 299 | //cerr<<"fQsum.X() = "<<fQsum.X()<<endl; |
300 | //cerr<<"fQsum.Y() = "<<fQsum.Y()<<endl; | |
301 | fQ2sum /= fEventNumber; | |
302 | cerr<<"fEventNumber = "<<fEventNumber<<endl; | |
303 | cerr<<"fQ2sum = "<<fQ2sum<<endl; | |
0092f3c2 | 304 | fSigma2 = fQ2sum - TMath::Power(fQsum->X(),2.) - TMath::Power(fQsum->Y(),2.) - TMath::Power(fV,2.); //BP eq. 62 |
f1d945a1 | 305 | if (fSigma2>0) fChi = fV/TMath::Sqrt(fSigma2); |
306 | else fChi = -1.; | |
307 | fCommonHistsRes->FillChi(fChi); | |
308 | cerr<<"fV = "<<fV<<" and chi = "<<fChi<<endl; | |
309 | } | |
310 | ||
311 | for(Int_t b=0;b<fNbinsPt;b++){ | |
312 | Double_t fv2pro = 0.; | |
313 | Double_t fErr2difcomb = 0.; | |
314 | Double_t fErrdifcomb = 0.; | |
315 | if(fHistProFlow) { | |
316 | fv2pro = fHistProFlow->GetBinContent(b); | |
317 | //calculate error | |
318 | for (Int_t theta=0;theta<fNtheta;theta++) { | |
319 | Double_t fTheta = ((double)theta/fNtheta)*TMath::Pi(); | |
320 | Int_t fNprime = TMath::Nint(fHistProFlow->GetBinEntries(b)); | |
321 | //cerr<<"fNprime = "<<fNprime<<endl; | |
322 | if (fNprime!=0.) { | |
323 | Double_t fApluscomb = TMath::Exp((fJ01*fJ01)/(2*fChi*fChi)* | |
324 | TMath::Cos(fTheta)); | |
325 | Double_t fAmincomb = TMath::Exp(-(fJ01*fJ01)/(2*fChi*fChi)* | |
326 | TMath::Cos(fTheta)); | |
327 | fErr2difcomb += (TMath::Cos(fTheta)/(4*fNprime*TMath::BesselJ1(fJ01)* | |
328 | TMath::BesselJ1(fJ01)))* | |
329 | ((fApluscomb*TMath::BesselJ0(2*fJ01*TMath::Sin(fTheta/2))) - | |
330 | (fAmincomb*TMath::BesselJ0(2*fJ01*TMath::Cos(fTheta/2)))); | |
331 | } //if !=0 | |
332 | //else { cout<<"fNprime = 0."<<endl; } | |
333 | } //loop over theta | |
334 | ||
335 | if (fErr2difcomb!=0.) { | |
336 | fErr2difcomb /= fNtheta; | |
337 | fErrdifcomb = TMath::Sqrt(fErr2difcomb)*100; | |
338 | //cerr<<"fErrdifcomb = "<<fErrdifcomb<<endl; | |
339 | } | |
340 | else {fErrdifcomb = 0.; } | |
341 | ||
342 | //fill TH1D | |
343 | fCommonHistsRes->FillDifferentialFlow(b, fv2pro, fErrdifcomb); | |
344 | ||
345 | } //if fHistProFLow | |
346 | else { | |
347 | cout << "Profile Hist missing" << endl; | |
348 | break; | |
349 | } | |
350 | ||
351 | } //loop over b | |
352 | ||
353 | // write to file | |
354 | fOutFile->Write(); | |
355 | ||
356 | cout<<"Making some plots to check the results:"<<endl<<endl; | |
357 | ||
358 | TCanvas *canvas = new TCanvas("canvas","compare v2 vs pt",800,800); | |
359 | canvas->cd(); | |
360 | fSecondVPt->SetLineColor(3); | |
361 | fSecondVPt->SetLineWidth(2); | |
362 | fSecondVPt->Draw(); | |
363 | fHistFlow = fCommonHistsRes->GetfHistDiffFlow(); | |
364 | fHistFlow->Draw("SAME"); | |
365 | // draw the legend | |
366 | TLegend *legend2 = new TLegend(0.6,0.65,0.88,0.85); | |
367 | legend2->SetTextFont(72); | |
368 | legend2->SetTextSize(0.04); | |
369 | legend2->AddEntry(fSecondVPt,"stand. LYZ","lpe"); | |
370 | legend2->AddEntry(fHistFlow,"new LYZ with calculated errors","lpe"); | |
371 | legend2->Draw(); | |
372 | ||
373 | TCanvas *canvas5 = new TCanvas("canvas5","phi and Delta Phi",800,600); | |
374 | canvas5->Divide(3,1); | |
375 | canvas5->cd(1); | |
376 | fHistDeltaPhi->Draw(); | |
377 | canvas5->cd(2); | |
378 | fHistPhiLYZ->Draw(); | |
379 | canvas5->cd(3); | |
380 | fHistPhiEP->Draw(); | |
381 | ||
382 | cout<<".....finished"<<endl; | |
383 | } |