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ca28c5f5 | 1 | /**************************************************************************** |
2 | * Very important, delicate and rather obscure macro. * | |
3 | * * | |
4 | * Creates list of "findable" V0s, * | |
5 | * calculates efficiency, resolutions etc. * | |
6 | * * | |
7 | * Origin: I.Belikov, IReS, Strasbourg, Jouri.Belikov@cern.ch * | |
8 | ****************************************************************************/ | |
9 | ||
566abf75 | 10 | #if !defined(__CINT__) || defined(__MAKECINT__) |
548b1270 | 11 | #include "Riostream.h" |
ca28c5f5 | 12 | #include <fstream.h> |
13 | ||
566abf75 | 14 | #include "AliRun.h" |
15 | #include "AliHeader.h" | |
16 | #include "AliRunLoader.h" | |
17 | #include "AliITSLoader.h" | |
18 | ||
ca28c5f5 | 19 | #include "TH1.h" |
20 | #include "TFile.h" | |
21 | #include "TTree.h" | |
22 | #include "TObjArray.h" | |
23 | #include "TStyle.h" | |
24 | #include "TCanvas.h" | |
25 | #include "TLine.h" | |
26 | #include "TText.h" | |
27 | #include "TParticle.h" | |
28 | #include "TStopwatch.h" | |
29 | ||
30 | #include "AliRun.h" | |
31 | #include "AliPDG.h" | |
32 | #include "AliV0vertex.h" | |
33 | #endif | |
34 | ||
35 | struct GoodVertex { | |
36 | Int_t nlab,plab; | |
37 | Int_t code; | |
38 | Float_t px,py,pz; | |
39 | Float_t x,y,z; | |
40 | }; | |
41 | Int_t good_vertices(GoodVertex *gt, Int_t max); | |
42 | ||
566abf75 | 43 | extern AliRun *gAlice; |
44 | ||
ca28c5f5 | 45 | Int_t AliV0Comparison(Int_t code=310) { //Lambda=3122, LambdaBar=-3122 |
46 | cerr<<"Doing comparison...\n"; | |
47 | ||
566abf75 | 48 | TStopwatch timer; |
49 | ||
04b2a5f1 | 50 | const Double_t V0window=0.05; |
51 | Double_t ptncut=0.13, ptpcut=0.13, kinecut=0.03; | |
52 | Double_t V0mass=0.497672, V0width=0.020; | |
ca28c5f5 | 53 | switch (code) { |
04b2a5f1 | 54 | case kK0Short: |
55 | break; | |
56 | case kLambda0: | |
57 | V0mass=1.115683; V0width=0.015; ptpcut=0.50; kinecut=0.002; | |
58 | break; | |
59 | case kLambda0Bar: | |
60 | V0mass=1.115683; V0width=0.015; ptncut=0.50; kinecut=0.002; | |
61 | break; | |
ca28c5f5 | 62 | default: cerr<<"Invalid PDG code !\n"; return 1; |
63 | } | |
64 | ||
566abf75 | 65 | TH1F *hp=new TH1F("hp","Angular Resolution",30,-30.,30.); //phi resolution |
66 | hp->SetXTitle("(mrad)"); hp->SetFillColor(2); | |
67 | TH1F *hl=new TH1F("hl","Lambda Resolution",30,-30,30); | |
68 | hl->SetXTitle("(mrad)"); hl->SetFillColor(1); hl->SetFillStyle(3013); | |
69 | TH1F *hpt=new TH1F("hpt","Relative Pt Resolution",30,-10.,10.); | |
70 | hpt->SetXTitle("(%)"); hpt->SetFillColor(2); | |
71 | ||
72 | TH1F *hx=new TH1F("hx","Position Resolution (X,Y)",30,-3.,3.); //x res. | |
73 | hx->SetXTitle("(mm)"); hx->SetFillColor(6); | |
74 | TH1F *hy=new TH1F("hy","Position Resolution (Y)",30,-3.,3.); //y res | |
75 | hy->SetXTitle("(mm)"); hy->SetFillColor(1); hy->SetFillStyle(3013); | |
76 | TH1F *hz=new TH1F("hz","Position Resolution (Z)",30,-3.,3.); //z res. | |
77 | hz->SetXTitle("(mm)"); hz->SetFillColor(6); | |
78 | ||
79 | ||
80 | Double_t pmin=0.2, pmax=4.2; Int_t nchan=20; | |
81 | TH1F *hgood=new TH1F("hgood","Good Vertices",nchan,pmin,pmax); | |
82 | TH1F *hfound=new TH1F("hfound","Found Vertices",nchan,pmin,pmax); | |
83 | TH1F *hfake=new TH1F("hfake","Fake Vertices",nchan,pmin,pmax); | |
84 | TH1F *hg=new TH1F("hg","Efficiency for Good Vertices",nchan,pmin,pmax); | |
85 | hg->SetLineColor(4); hg->SetLineWidth(2); | |
86 | TH1F *hf=new TH1F("hf","Probability of Fake Vertices",nchan,pmin,pmax); | |
87 | hf->SetFillColor(1); hf->SetFillStyle(3013); hf->SetLineWidth(2); | |
88 | ||
89 | Double_t mmin=V0mass-V0window, mmax=V0mass+V0window; | |
90 | TH1F *v0s =new TH1F("v0s","V0s Effective Mass",40, mmin, mmax); | |
91 | v0s->SetXTitle("(GeV)"); | |
92 | v0s->SetLineColor(4); v0s->SetLineWidth(4); | |
93 | TH1F *v0sf =new TH1F("v0sf","Fake V0s Effective Mass",40, mmin, mmax); | |
94 | v0sf->SetXTitle("(GeV)"); v0sf->SetFillColor(6); | |
95 | ||
96 | ||
97 | if (gAlice) { | |
98 | delete gAlice->GetRunLoader(); | |
99 | delete gAlice; | |
100 | gAlice=0; | |
101 | } | |
102 | AliRunLoader *rl = AliRunLoader::Open("galice.root"); | |
103 | if (!rl) { | |
104 | cerr<<"AliV0Comparison.C :Can't start sesion !\n"; | |
105 | return 1; | |
106 | } | |
107 | AliITSLoader* itsl = (AliITSLoader*)rl->GetLoader("ITSLoader"); | |
108 | if (itsl == 0x0) { | |
109 | cerr<<"AliV0Comparison.C : Can not find the ITSLoader\n"; | |
110 | delete rl; | |
111 | return 2; | |
112 | } | |
ca28c5f5 | 113 | |
114 | /*** Load reconstructed vertices ***/ | |
ca28c5f5 | 115 | TObjArray varray(1000); |
566abf75 | 116 | itsl->LoadV0s(); |
117 | TTree *vTree=itsl->TreeV0(); | |
ca28c5f5 | 118 | TBranch *branch=vTree->GetBranch("vertices"); |
119 | Int_t nentr=(Int_t)vTree->GetEntries(); | |
120 | for (Int_t i=0; i<nentr; i++) { | |
121 | AliV0vertex *iovertex=new AliV0vertex; branch->SetAddress(&iovertex); | |
122 | vTree->GetEvent(i); | |
123 | varray.AddLast(iovertex); | |
124 | } | |
125 | ||
126 | /*** Check if the file with the "good" vertices exists ***/ | |
127 | GoodVertex gv[1000]; | |
128 | Int_t ngood=0; | |
129 | ifstream in("good_vertices"); | |
130 | if (in) { | |
131 | cerr<<"Reading good vertices...\n"; | |
132 | while (in>>gv[ngood].nlab>>gv[ngood].plab>>gv[ngood].code>> | |
133 | gv[ngood].px>>gv[ngood].py>>gv[ngood].pz>> | |
134 | gv[ngood].x >>gv[ngood].y >>gv[ngood].z) { | |
135 | ngood++; | |
136 | cerr<<ngood<<'\r'; | |
137 | if (ngood==1000) { | |
138 | cerr<<"Too many good vertices !\n"; | |
139 | break; | |
140 | } | |
141 | } | |
142 | if (!in.eof()) cerr<<"Read error (good_vertices) !\n"; | |
143 | } else { | |
144 | /*** generate a file with the "good" vertices ***/ | |
145 | cerr<<"Marking good vertices (this will take a while)...\n"; | |
146 | ngood=good_vertices(gv,1000); | |
147 | ofstream out("good_vertices"); | |
148 | if (out) { | |
149 | for (Int_t ngd=0; ngd<ngood; ngd++) | |
150 | out<<gv[ngd].nlab<<' '<<gv[ngd].plab<<' '<<gv[ngd].code<<' '<< | |
151 | gv[ngd].px<<' '<<gv[ngd].py<<' '<<gv[ngd].pz<<' '<< | |
152 | gv[ngd].x <<' '<<gv[ngd].y <<' '<<gv[ngd].z <<endl; | |
153 | } else cerr<<"Can not open file (good_vertices) !\n"; | |
154 | out.close(); | |
155 | } | |
156 | ||
ca28c5f5 | 157 | |
158 | Double_t pxg=0.,pyg=0.,ptg=0.; | |
159 | Int_t nlab=-1, plab=-1; | |
160 | Int_t i; | |
161 | for (i=0; i<nentr; i++) { | |
162 | AliV0vertex *vertex=(AliV0vertex*)varray.UncheckedAt(i); | |
163 | nlab=TMath::Abs(vertex->GetNlabel()); | |
164 | plab=TMath::Abs(vertex->GetPlabel()); | |
165 | ||
04b2a5f1 | 166 | /** Kinematical cuts **/ |
167 | Double_t pxn,pyn,pzn; vertex->GetNPxPyPz(pxn,pyn,pzn); | |
168 | Double_t ptn=TMath::Sqrt(pxn*pxn + pyn*pyn); | |
169 | if (ptn < ptncut) continue; | |
170 | Double_t pxp,pyp,pzp; vertex->GetPPxPyPz(pxp,pyp,pzp); | |
171 | Double_t ptp=TMath::Sqrt(pxp*pxp + pyp*pyp); | |
172 | if (ptp < ptpcut) continue; | |
173 | Double_t kine=vertex->ChangeMassHypothesis(code); | |
174 | //if (TMath::Abs(kine)>kinecut) continue; | |
ca28c5f5 | 175 | |
176 | Double_t mass=vertex->GetEffMass(); | |
177 | v0s->Fill(mass); | |
04b2a5f1 | 178 | v0sf->Fill(mass); |
ca28c5f5 | 179 | |
180 | Int_t j; | |
181 | for (j=0; j<ngood; j++) { | |
182 | if (gv[j].code != vertex->GetPdgCode()) continue; | |
183 | if (gv[j].nlab == nlab) | |
184 | if (gv[j].plab == plab) break; | |
185 | } | |
186 | ||
187 | if (TMath::Abs(mass-V0mass)>V0width) continue; | |
188 | ||
189 | Double_t px,py,pz; vertex->GetPxPyPz(px,py,pz); | |
190 | Double_t pt=TMath::Sqrt(px*px+py*py); | |
191 | ||
192 | if (j==ngood) { | |
193 | hfake->Fill(pt); | |
194 | cerr<<"Fake vertex: ("<<nlab<<","<<plab<<")\n"; | |
195 | continue; | |
196 | } | |
04b2a5f1 | 197 | v0sf->Fill(mass,-1); |
ca28c5f5 | 198 | |
199 | pxg=gv[j].px; pyg=gv[j].py; ptg=TMath::Sqrt(pxg*pxg+pyg*pyg); | |
200 | Double_t phig=TMath::ATan2(pyg,pxg), phi=TMath::ATan2(py,px); | |
201 | Double_t lamg=TMath::ATan2(gv[j].pz,ptg), lam=TMath::ATan2(pz,pt); | |
202 | hp->Fill((phi - phig)*1000.); | |
203 | hl->Fill((lam - lamg)*1000.); | |
204 | hpt->Fill((1/pt - 1/ptg)/(1/ptg)*100.); | |
205 | ||
206 | Double_t x,y,z; vertex->GetXYZ(x,y,z); | |
207 | hx->Fill((x-gv[j].x)*10); | |
208 | hy->Fill((y-gv[j].y)*10); | |
209 | hz->Fill((z-gv[j].z)*10); | |
210 | ||
211 | hfound->Fill(ptg); | |
212 | gv[j].nlab=-1; | |
213 | ||
214 | } | |
215 | for (i=0; i<ngood; i++) { | |
216 | if (gv[i].code != code) continue; | |
217 | pxg=gv[i].px; pyg=gv[i].py; ptg=TMath::Sqrt(pxg*pxg+pyg*pyg); | |
218 | hgood->Fill(ptg); | |
219 | nlab=gv[i].nlab; plab=gv[i].plab; | |
220 | if (nlab < 0) continue; | |
221 | cerr<<"Vertex ("<<nlab<<','<<plab<<") has not been found !\n"; | |
222 | } | |
223 | ||
224 | varray.Delete(); | |
225 | ||
226 | Stat_t ng=hgood->GetEntries(); | |
227 | Stat_t nf=hfound->GetEntries(); | |
228 | ||
229 | cerr<<"Number of found vertices: "<<nentr<<" ("<<nf<<" in the peak)\n"; | |
230 | cerr<<"Number of good vertices: "<<ng<<endl; | |
231 | ||
232 | if (ng!=0) | |
233 | cerr<<"Integral efficiency is about "<<nf/ng*100.<<" %\n"; | |
234 | ||
235 | gStyle->SetOptStat(111110); | |
236 | gStyle->SetOptFit(1); | |
237 | ||
238 | TCanvas *c1=new TCanvas("c1","",0,0,580,610); | |
239 | c1->Divide(2,2); | |
240 | ||
241 | c1->cd(1); | |
242 | gPad->SetFillColor(42); gPad->SetFrameFillColor(10); | |
243 | //hp->Fit("gaus"); | |
244 | hp->Draw(); | |
245 | hl->Draw("same"); c1->cd(); | |
246 | ||
247 | c1->cd(2); | |
248 | gPad->SetFillColor(42); gPad->SetFrameFillColor(10); | |
249 | //hpt->Fit("gaus"); c1->cd(); | |
250 | hpt->Draw(); c1->cd(); | |
251 | ||
252 | c1->cd(3); | |
253 | gPad->SetFillColor(42); gPad->SetFrameFillColor(10); | |
254 | //hx->Fit("gaus"); | |
255 | hx->Draw(); | |
256 | hy->Draw("same"); c1->cd(); | |
257 | ||
258 | c1->cd(4); | |
259 | gPad->SetFillColor(42); gPad->SetFrameFillColor(10); | |
260 | //hz->Fit("gaus"); | |
261 | hz->Draw(); | |
262 | ||
263 | ||
264 | TCanvas *c2=new TCanvas("c2","",600,0,580,610); | |
265 | c2->Divide(1,2); | |
266 | ||
267 | c2->cd(1); | |
268 | gPad->SetFillColor(42); gPad->SetFrameFillColor(10); | |
269 | hfound->Sumw2(); hgood->Sumw2(); hfake->Sumw2(); | |
270 | hg->Divide(hfound,hgood,1,1.,"b"); | |
271 | hf->Divide(hfake,hgood,1,1.,"b"); | |
272 | hg->SetMaximum(1.4); | |
273 | hg->SetYTitle("V0 reconstruction efficiency"); | |
274 | hg->SetXTitle("Pt (GeV/c)"); | |
275 | hg->Draw(); | |
276 | ||
277 | TLine *line1 = new TLine(pmin,1.0,pmax,1.0); line1->SetLineStyle(4); | |
278 | line1->Draw("same"); | |
279 | TLine *line2 = new TLine(pmin,0.9,pmax,0.9); line2->SetLineStyle(4); | |
280 | line2->Draw("same"); | |
281 | ||
282 | hf->SetFillColor(1); | |
283 | hf->SetFillStyle(3013); | |
284 | hf->SetLineColor(2); | |
285 | hf->SetLineWidth(2); | |
286 | hf->Draw("histsame"); | |
287 | TText *text = new TText(0.461176,0.248448,"Fake vertices"); | |
288 | text->SetTextSize(0.05); | |
289 | text->Draw(); | |
290 | text = new TText(0.453919,1.11408,"Good vertices"); | |
291 | text->SetTextSize(0.05); | |
292 | text->Draw(); | |
293 | ||
294 | ||
295 | c2->cd(2); | |
296 | gPad->SetFillColor(42); gPad->SetFrameFillColor(10); | |
04b2a5f1 | 297 | //v0s->Fit("gaus","","",V0mass-V0width,V0mass+V0width); |
298 | v0s->Draw(); | |
299 | v0sf->Draw("same"); | |
ca28c5f5 | 300 | Double_t max=v0s->GetMaximum(); |
301 | TLine *line3 = new TLine(V0mass-V0width,0.,V0mass-V0width,max); | |
302 | line3->Draw("same"); | |
303 | TLine *line4 = new TLine(V0mass+V0width,0.,V0mass+V0width,max); | |
304 | line4->Draw("same"); | |
305 | ||
306 | timer.Stop(); timer.Print(); | |
307 | ||
566abf75 | 308 | delete rl; |
309 | ||
ca28c5f5 | 310 | return 0; |
311 | } | |
312 | ||
313 | Int_t good_vertices(GoodVertex *gv, Int_t max) { | |
314 | Int_t nv=0; | |
315 | /*** Get information about the cuts ***/ | |
316 | Double_t r2min=0.9*0.9; | |
317 | Double_t r2max=2.9*2.9; | |
318 | ||
319 | /*** Get labels of the "good" tracks ***/ | |
320 | Double_t dd; Int_t id, label[15000], ngt=0; | |
321 | ifstream in("good_tracks_its"); | |
322 | if (!in) { | |
323 | cerr<<"Can't open the file good_tracks_its \n"; | |
324 | return nv; | |
325 | } | |
326 | while (in>>label[ngt]>>id>>dd>>dd>>dd>>dd>>dd>>dd) { | |
327 | ngt++; | |
328 | if (ngt>=15000) { | |
329 | cerr<<"Too many good ITS tracks !\n"; | |
330 | return nv; | |
331 | } | |
332 | } | |
333 | if (!in.eof()) { | |
334 | cerr<<"Read error (good_tracks_its) !\n"; | |
335 | return nv; | |
336 | } | |
337 | ||
338 | /*** Get an access to the kinematics ***/ | |
566abf75 | 339 | AliRunLoader *rl = |
340 | AliRunLoader::GetRunLoader(AliConfig::fgkDefaultEventFolderName); | |
341 | if (rl == 0x0) { | |
342 | ::Fatal("AliV0Comparison.C::good_vertices","Can not find Run Loader !"); | |
343 | } | |
ca28c5f5 | 344 | |
566abf75 | 345 | AliITSLoader* itsl = (AliITSLoader*)rl->GetLoader("ITSLoader"); |
346 | if (itsl == 0x0) { | |
347 | cerr<<"AliITSComparisonV2.C : Can not find TPCLoader\n"; | |
348 | delete rl; | |
349 | return 1; | |
ca28c5f5 | 350 | } |
566abf75 | 351 | rl->LoadgAlice(); |
352 | rl->LoadHeader(); | |
353 | rl->LoadKinematics(); | |
354 | Int_t np = rl->GetHeader()->GetNtrack(); | |
ca28c5f5 | 355 | |
ca28c5f5 | 356 | while (np--) { |
357 | cerr<<np<<'\r'; | |
358 | TParticle *p0=gAlice->Particle(np); | |
359 | ||
360 | /*** only these V0s are "good" ***/ | |
361 | Int_t code=p0->GetPdgCode(); | |
362 | if (code!=kK0Short) | |
363 | if (code!=kLambda0) | |
364 | if (code!=kLambda0Bar) continue; | |
365 | ||
366 | /*** daughter tracks should be "good" ***/ | |
367 | Int_t plab=p0->GetFirstDaughter(), nlab=p0->GetLastDaughter(); | |
368 | if (nlab==plab) continue; | |
369 | if (nlab<0) continue; | |
370 | if (plab<0) continue; | |
371 | Int_t i; | |
372 | for (i=0; i<ngt; i++) if (label[i]==nlab) break; | |
373 | if (i==ngt) continue; | |
374 | for (i=0; i<ngt; i++) if (label[i]==plab) break; | |
375 | if (i==ngt) continue; | |
376 | ||
377 | /*** fiducial volume ***/ | |
378 | TParticle *p=gAlice->Particle(nlab); | |
379 | Double_t x=p->Vx(), y=p->Vy(), z=p->Vz(), r2=x*x+y*y; | |
380 | if (r2<r2min) continue; | |
381 | if (r2>r2max) continue; | |
382 | ||
383 | if (gAlice->Particle(plab)->GetPDG()->Charge() < 0.) { | |
384 | i=plab; plab=nlab; nlab=i; | |
385 | } | |
386 | ||
387 | gv[nv].code=code; | |
388 | gv[nv].plab=plab; gv[nv].nlab=nlab; | |
389 | gv[nv].px=p0->Px(); gv[nv].py=p0->Py(); gv[nv].pz=p0->Pz(); | |
390 | gv[nv].x=x; gv[nv].y=y; gv[nv].z=z; | |
391 | nv++; | |
392 | } | |
393 | ||
566abf75 | 394 | delete rl; |
ca28c5f5 | 395 | |
396 | return nv; | |
397 | } |