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ca28c5f5 | 1 | /**************************************************************************** |
2 | * Very important, delicate and rather obscure macro. * | |
3 | * * | |
4 | * Creates list of "findable" cascades, * | |
5 | * calculates efficiency, resolutions etc. * | |
6 | * * | |
7 | * Origin: Christian Kuhn, IReS, Strasbourg, christian.kuhn@ires.in2p3.fr * | |
8 | ****************************************************************************/ | |
9 | ||
566abf75 | 10 | #if !defined(__CINT__) || defined(__MAKECINT__) |
ddae8318 | 11 | #include <Riostream.h> |
ca28c5f5 | 12 | #include <fstream.h> |
13 | ||
566abf75 | 14 | #include "AliRun.h" |
5102bab6 | 15 | #include "AliMC.h" |
566abf75 | 16 | #include "AliHeader.h" |
17 | #include "AliRunLoader.h" | |
18 | #include "AliITSLoader.h" | |
19 | ||
ca28c5f5 | 20 | #include "TH1.h" |
21 | #include "TFile.h" | |
5102bab6 | 22 | #include "TKey.h" |
ca28c5f5 | 23 | #include "TObjArray.h" |
24 | #include "TStyle.h" | |
25 | #include "TCanvas.h" | |
26 | #include "TLine.h" | |
27 | #include "TText.h" | |
28 | #include "TParticle.h" | |
29 | #include "TStopwatch.h" | |
ad6e4d9a | 30 | #include "TPDGCode.h" |
ca28c5f5 | 31 | |
32 | #include "AliRun.h" | |
5102bab6 | 33 | #include "AliESD.h" |
ca28c5f5 | 34 | #include "AliCascadeVertex.h" |
35 | #endif | |
36 | ||
37 | struct GoodCascade { | |
38 | Int_t nlab,plab; // V0's daughter labels | |
39 | Int_t blab; // Bachelor label | |
40 | Int_t code; | |
41 | Float_t px,py,pz; | |
42 | Float_t x,y,z; | |
43 | }; | |
44 | Int_t good_cascades(GoodCascade *gt, Int_t max); | |
45 | ||
566abf75 | 46 | extern AliRun *gAlice; |
47 | ||
ca28c5f5 | 48 | Int_t AliCascadeComparison(Int_t code=3312) { |
49 | //code= 3312; //kXiMinus | |
50 | //code=-3312; //kXiPlusBar | |
51 | //code= 3334; //kOmegaMinus | |
52 | //code=-3334; //kOmegaPlusBar | |
ca28c5f5 | 53 | cerr<<"Doing comparison...\n"; |
566abf75 | 54 | TStopwatch timer; |
55 | ||
5102bab6 | 56 | /*** Check if the file with the "good" cascades exists ***/ |
57 | GoodCascade gc[100]; | |
58 | Int_t ngood=0; | |
59 | ifstream in("good_cascades"); | |
60 | if (in) { | |
61 | cerr<<"Reading good cascades...\n"; | |
62 | while (in>>gc[ngood].nlab>>gc[ngood].plab>> | |
63 | gc[ngood].blab>>gc[ngood].code>> | |
64 | gc[ngood].px>>gc[ngood].py>>gc[ngood].pz>> | |
65 | gc[ngood].x >>gc[ngood].y >>gc[ngood].z) { | |
66 | ngood++; | |
67 | cerr<<ngood<<'\r'; | |
68 | if (ngood==100) { | |
69 | cerr<<"Too many good cascades !\n"; | |
70 | break; | |
71 | } | |
72 | } | |
73 | if (!in.eof()) cerr<<"Read error (good_cascades) !\n"; | |
74 | } else { | |
75 | /*** generate a file with the "good" cascades ***/ | |
76 | cerr<<"Marking good cascades (this will take a while)...\n"; | |
77 | ngood=good_cascades(gc,100); | |
78 | ofstream out("good_cascades"); | |
79 | if (out) { | |
80 | for (Int_t ngd=0; ngd<ngood; ngd++) | |
81 | out<<gc[ngd].nlab<<' '<<gc[ngd].plab<<' '<< | |
82 | gc[ngd].blab<<' '<<gc[ngd].code<<' '<< | |
83 | gc[ngd].px<<' '<<gc[ngd].py<<' '<<gc[ngd].pz<<' '<< | |
84 | gc[ngd].x <<' '<<gc[ngd].y <<' '<<gc[ngd].z <<endl; | |
85 | } else cerr<<"Can not open file (good_cascades) !\n"; | |
86 | out.close(); | |
87 | } | |
88 | ||
89 | AliESD *event=0; | |
90 | { /*** Load reconstructed vertices ***/ | |
91 | TFile *ef=TFile::Open("AliESDcas.root"); | |
92 | if ((!ef)||(!ef->IsOpen())) { | |
93 | cerr<<"AliCascadeComparison.C: Can't open AliESDcas.root !\n"; | |
94 | return 1; | |
95 | } | |
96 | TKey *key=0; | |
97 | TIter next(ef->GetListOfKeys()); | |
98 | if ((key=(TKey*)next())!=0) event=(AliESD*)key->ReadObj(); | |
99 | ef->Close(); | |
100 | } | |
101 | Int_t nentr=event->GetNumberOfCascades(); | |
102 | ||
103 | ||
ca28c5f5 | 104 | const Double_t cascadeWindow=0.05, cascadeWidth=0.015; |
04b2a5f1 | 105 | Double_t ptncut=0.12, ptpcut=0.33, kine0cut=0.003; |
106 | Double_t ptbcut=0.11, kinecut=0.002; | |
107 | Double_t cascadeMass=1.32131; | |
ca28c5f5 | 108 | switch (code) { |
109 | case kXiMinus: | |
04b2a5f1 | 110 | break; |
111 | case kXiPlusBar: | |
112 | ptncut=0.33; ptpcut=0.12; | |
113 | break; | |
ca28c5f5 | 114 | case kOmegaMinus: |
04b2a5f1 | 115 | cascadeMass=1.67245; |
116 | kine0cut=0.001; | |
117 | ptbcut=0.22; kinecut=0.006; | |
118 | break; | |
119 | case kOmegaPlusBar: | |
120 | cascadeMass=1.67245; | |
121 | kine0cut=0.001; | |
122 | ptncut=0.33; ptpcut=0.12; | |
123 | ptbcut=0.22; kinecut=0.006; | |
124 | break; | |
ca28c5f5 | 125 | default: cerr<<"Invalid PDG code !\n"; return 1; |
126 | } | |
127 | ||
566abf75 | 128 | /*** create some histograms ***/ |
129 | TH1F *hp=new TH1F("hp","Angular Resolution",30,-30.,30.); //phi resolution | |
130 | hp->SetXTitle("(mrad)"); hp->SetFillColor(2); | |
131 | TH1F *hl=new TH1F("hl","Lambda Resolution",30,-30,30); | |
132 | hl->SetXTitle("(mrad)"); hl->SetFillColor(1); hl->SetFillStyle(3013); | |
133 | TH1F *hpt=new TH1F("hpt","Relative Pt Resolution",30,-10.,10.); | |
134 | hpt->SetXTitle("(%)"); hpt->SetFillColor(2); | |
135 | ||
136 | TH1F *hx=new TH1F("hx","Position Resolution (X,Y)",30,-3.,3.); //x res. | |
137 | hx->SetXTitle("(mm)"); hx->SetFillColor(6); | |
138 | TH1F *hy=new TH1F("hy","Position Resolution (Y)",30,-3.,3.); //y res | |
139 | hy->SetXTitle("(mm)"); hy->SetFillColor(1); hy->SetFillStyle(3013); | |
140 | TH1F *hz=new TH1F("hz","Position Resolution (Z)",30,-3.,3.); //z res. | |
141 | hz->SetXTitle("(mm)"); hz->SetFillColor(6); | |
142 | ||
143 | Double_t pmin=0.2, pmax=4.2; Int_t nchan=20; | |
144 | TH1F *hgood=new TH1F("hgood","Good Cascades",nchan,pmin,pmax); | |
145 | TH1F *hfound=new TH1F("hfound","Found Cascades",nchan,pmin,pmax); | |
146 | TH1F *hfake=new TH1F("hfake","Fake Cascades",nchan,pmin,pmax); | |
147 | TH1F *hg=new TH1F("hg","Efficiency for Good Cascades",nchan,pmin,pmax); | |
148 | hg->SetLineColor(4); hg->SetLineWidth(2); | |
149 | TH1F *hf=new TH1F("hf","Probability of Fake Cascades",nchan,pmin,pmax); | |
150 | hf->SetFillColor(1); hf->SetFillStyle(3013); hf->SetLineWidth(2); | |
151 | ||
152 | Double_t mmin=cascadeMass-cascadeWindow, mmax=cascadeMass+cascadeWindow; | |
153 | TH1F *cs =new TH1F("cs","Cascade Effective Mass",40, mmin, mmax); | |
154 | cs->SetXTitle("(GeV)"); | |
155 | cs->SetLineColor(4); cs->SetLineWidth(4); | |
156 | TH1F *csf =new TH1F("csf","Fake Cascade Effective Mass",40, mmin, mmax); | |
157 | csf->SetXTitle("(GeV)"); csf->SetFillColor(6); | |
158 | ||
ca28c5f5 | 159 | Double_t pxg=0.,pyg=0.,ptg=0.; |
160 | Int_t nlab=-1, plab=-1, blab=-1; | |
161 | Int_t i; | |
162 | for (i=0; i<nentr; i++) { | |
5102bab6 | 163 | AliESDcascade *cascade=event->GetCascade(i); |
164 | ||
165 | Int_t nidx=TMath::Abs(cascade->GetNindex()); | |
166 | Int_t pidx=TMath::Abs(cascade->GetPindex()); | |
167 | Int_t bidx=TMath::Abs(cascade->GetBindex()); | |
168 | ||
169 | AliESDtrack *ntrack=event->GetTrack(nidx); | |
170 | AliESDtrack *ptrack=event->GetTrack(pidx); | |
171 | AliESDtrack *btrack=event->GetTrack(bidx); | |
172 | ||
173 | nlab=TMath::Abs(ntrack->GetLabel()); | |
174 | plab=TMath::Abs(ptrack->GetLabel()); | |
175 | blab=TMath::Abs(btrack->GetLabel()); | |
04b2a5f1 | 176 | |
177 | /** Kinematical cuts **/ | |
178 | Double_t pxn,pyn,pzn; cascade->GetNPxPyPz(pxn,pyn,pzn); | |
179 | Double_t ptn=TMath::Sqrt(pxn*pxn + pyn*pyn); | |
180 | if (ptn < ptncut) continue; | |
181 | Double_t pxp,pyp,pzp; cascade->GetPPxPyPz(pxp,pyp,pzp); | |
182 | Double_t ptp=TMath::Sqrt(pxp*pxp + pyp*pyp); | |
183 | if (ptp < ptpcut) continue; | |
184 | Double_t pxb,pyb,pzb; cascade->GetBPxPyPz(pxb,pyb,pzb); | |
185 | Double_t ptb=TMath::Sqrt(pxb*pxb + pyb*pyb); | |
186 | if (ptb < ptbcut) continue; | |
187 | Double_t kine0; | |
188 | Double_t kine=cascade->ChangeMassHypothesis(kine0,code); | |
189 | if (TMath::Abs(kine0)>kine0cut) continue; | |
190 | //if (TMath::Abs(kine)>kinecut) continue; | |
ca28c5f5 | 191 | |
192 | Double_t mass=cascade->GetEffMass(); | |
193 | cs->Fill(mass); | |
04b2a5f1 | 194 | csf->Fill(mass); |
ca28c5f5 | 195 | |
196 | if (TMath::Abs(mass-cascadeMass)>cascadeWidth) continue; | |
197 | ||
198 | Int_t j; | |
199 | for (j=0; j<ngood; j++) { | |
200 | if (gc[j].code != cascade->GetPdgCode()) continue; | |
201 | if (gc[j].nlab == nlab) | |
202 | if (gc[j].plab == plab) | |
203 | if (gc[j].blab == blab) break; | |
204 | } | |
205 | ||
206 | Double_t px,py,pz; cascade->GetPxPyPz(px,py,pz); | |
207 | Double_t pt=TMath::Sqrt(px*px+py*py); | |
208 | ||
209 | if (j==ngood) { | |
210 | hfake->Fill(pt); | |
211 | cerr<<"Fake cascade: ("<<nlab<<","<<plab<<","<<blab<<")\n"; | |
212 | continue; | |
213 | } | |
04b2a5f1 | 214 | csf->Fill(mass,-1); |
ca28c5f5 | 215 | |
216 | pxg=gc[j].px; pyg=gc[j].py; ptg=TMath::Sqrt(pxg*pxg+pyg*pyg); | |
217 | Double_t phig=TMath::ATan2(pyg,pxg), phi=TMath::ATan2(py,px); | |
218 | Double_t lamg=TMath::ATan2(gc[j].pz,ptg), lam=TMath::ATan2(pz,pt); | |
219 | hp->Fill((phi - phig)*1000.); | |
220 | hl->Fill((lam - lamg)*1000.); | |
221 | hpt->Fill((1/pt - 1/ptg)/(1/ptg)*100.); | |
222 | ||
223 | Double_t x,y,z; cascade->GetXYZ(x,y,z); | |
224 | hx->Fill((x-gc[j].x)*10); | |
225 | hy->Fill((y-gc[j].y)*10); | |
226 | hz->Fill((z-gc[j].z)*10); | |
227 | ||
228 | hfound->Fill(ptg); | |
229 | gc[j].nlab=-1; | |
230 | ||
231 | } | |
232 | for (i=0; i<ngood; i++) { | |
233 | if (gc[i].code != code) continue; | |
234 | pxg=gc[i].px; pyg=gc[i].py; ptg=TMath::Sqrt(pxg*pxg+pyg*pyg); | |
235 | hgood->Fill(ptg); | |
236 | nlab=gc[i].nlab; plab=gc[i].plab; blab=gc[i].blab; | |
237 | if (nlab < 0) continue; | |
238 | cerr<<"Cascade ("<<nlab<<','<<plab<<","<<blab<<") has not been found !\n"; | |
239 | } | |
240 | ||
5102bab6 | 241 | delete event; |
ca28c5f5 | 242 | |
243 | Stat_t ng=hgood->GetEntries(); | |
244 | Stat_t nf=hfound->GetEntries(); | |
245 | ||
246 | cerr<<"Number of found cascades: "<<nentr<<" ("<<nf<<" in the peak)\n"; | |
247 | cerr<<"Number of good cascades: "<<ng<<endl; | |
248 | ||
249 | if (ng!=0) | |
250 | cerr<<"Integral efficiency is about "<<nf/ng*100.<<" %\n"; | |
251 | ||
252 | gStyle->SetOptStat(111110); | |
253 | gStyle->SetOptFit(1); | |
254 | ||
255 | TCanvas *c1=new TCanvas("c1","",0,0,580,610); | |
256 | c1->Divide(2,2); | |
257 | ||
258 | c1->cd(1); | |
259 | gPad->SetFillColor(42); gPad->SetFrameFillColor(10); | |
260 | //hp->Fit("gaus"); | |
261 | hp->Draw(); | |
262 | hl->Draw("same"); c1->cd(); | |
263 | ||
264 | c1->cd(2); | |
265 | gPad->SetFillColor(42); gPad->SetFrameFillColor(10); | |
266 | //hpt->Fit("gaus"); c1->cd(); | |
267 | hpt->Draw(); c1->cd(); | |
268 | ||
269 | c1->cd(3); | |
270 | gPad->SetFillColor(42); gPad->SetFrameFillColor(10); | |
271 | //hx->Fit("gaus"); | |
272 | hx->Draw(); | |
273 | hy->Draw("same"); c1->cd(); | |
274 | ||
275 | c1->cd(4); | |
276 | gPad->SetFillColor(42); gPad->SetFrameFillColor(10); | |
277 | //hz->Fit("gaus"); | |
278 | hz->Draw(); | |
279 | ||
280 | ||
281 | TCanvas *c2=new TCanvas("c2","",600,0,580,610); | |
282 | c2->Divide(1,2); | |
283 | ||
284 | c2->cd(1); | |
285 | gPad->SetFillColor(42); gPad->SetFrameFillColor(10); | |
286 | hfound->Sumw2(); hgood->Sumw2(); hfake->Sumw2(); | |
287 | hg->Divide(hfound,hgood,1,1.,"b"); | |
288 | hf->Divide(hfake,hgood,1,1.,"b"); | |
289 | hg->SetMaximum(1.4); | |
290 | hg->SetYTitle("Cascade reconstruction efficiency"); | |
291 | hg->SetXTitle("Pt (GeV/c)"); | |
292 | hg->Draw(); | |
293 | ||
294 | TLine *line1 = new TLine(pmin,1.0,pmax,1.0); line1->SetLineStyle(4); | |
295 | line1->Draw("same"); | |
296 | TLine *line2 = new TLine(pmin,0.9,pmax,0.9); line2->SetLineStyle(4); | |
297 | line2->Draw("same"); | |
298 | ||
299 | hf->SetFillColor(1); | |
300 | hf->SetFillStyle(3013); | |
301 | hf->SetLineColor(2); | |
302 | hf->SetLineWidth(2); | |
303 | hf->Draw("histsame"); | |
304 | TText *text = new TText(0.461176,0.248448,"Fake cascades"); | |
305 | text->SetTextSize(0.05); | |
306 | text->Draw(); | |
307 | text = new TText(0.453919,1.11408,"Good cascades"); | |
308 | text->SetTextSize(0.05); | |
309 | text->Draw(); | |
310 | ||
311 | ||
312 | c2->cd(2); | |
313 | gPad->SetFillColor(42); gPad->SetFrameFillColor(10); | |
ca28c5f5 | 314 | //cs->Fit("gaus","","",cascadeMass-cascadeWidth,cascadeMass+cascadeWidth); |
315 | cs->Draw(); | |
04b2a5f1 | 316 | csf->Draw("same"); |
ca28c5f5 | 317 | Double_t max=cs->GetMaximum(); |
318 | TLine *line3 = | |
319 | new TLine(cascadeMass-cascadeWidth,0.,cascadeMass-cascadeWidth,max); | |
320 | line3->Draw("same"); | |
321 | TLine *line4 = | |
322 | new TLine(cascadeMass+cascadeWidth,0.,cascadeMass+cascadeWidth,max); | |
323 | line4->Draw("same"); | |
324 | ||
325 | timer.Stop(); timer.Print(); | |
326 | ||
327 | return 0; | |
328 | } | |
329 | ||
330 | ||
ca28c5f5 | 331 | Int_t good_cascades(GoodCascade *gc, Int_t max) { |
332 | Int_t nc=0; | |
333 | /*** Get information about the cuts ***/ | |
334 | Double_t r2min=0.9*0.9; | |
335 | Double_t r2max=2.9*2.9; | |
336 | ||
337 | /*** Get labels of the "good" tracks ***/ | |
338 | Double_t dd; Int_t id, label[15000], ngt=0; | |
339 | ifstream in("good_tracks_its"); | |
340 | if (!in) { | |
341 | cerr<<"Can't open the file good_tracks_its \n"; | |
342 | return nc; | |
343 | } | |
344 | while (in>>label[ngt]>>id>>dd>>dd>>dd>>dd>>dd>>dd) { | |
345 | ngt++; | |
346 | if (ngt>=15000) { | |
347 | cerr<<"Too many good ITS tracks !\n"; | |
348 | return nc; | |
349 | } | |
350 | } | |
351 | if (!in.eof()) { | |
352 | cerr<<"Read error (good_tracks_its) !\n"; | |
353 | return nc; | |
354 | } | |
355 | ||
356 | /*** Get an access to the kinematics ***/ | |
5102bab6 | 357 | if (gAlice) { |
358 | delete gAlice->GetRunLoader(); | |
359 | delete gAlice; | |
360 | gAlice=0; | |
361 | } | |
362 | AliRunLoader *rl = AliRunLoader::Open("galice.root"); | |
363 | if (!rl) { | |
364 | cerr<<"AliCascadeComparison.C, good_cascades :Can't start session !\n"; | |
566abf75 | 365 | return 1; |
ca28c5f5 | 366 | } |
5102bab6 | 367 | |
566abf75 | 368 | rl->LoadgAlice(); |
369 | rl->LoadHeader(); | |
370 | rl->LoadKinematics(); | |
371 | Int_t np = rl->GetHeader()->GetNtrack(); | |
ca28c5f5 | 372 | |
ca28c5f5 | 373 | while (np--) { |
374 | cerr<<np<<'\r'; | |
0555741a | 375 | TParticle *cp=gAlice->GetMCApp()->Particle(np); |
ca28c5f5 | 376 | |
377 | /*** only these cascades are "good" ***/ | |
378 | Int_t code=cp->GetPdgCode(); | |
379 | if (code!=kXiMinus) if (code!=kXiPlusBar) | |
380 | if (code!=kOmegaMinus) if (code!=kOmegaPlusBar) continue; | |
381 | ||
382 | /*** daughter tracks must be "good" ***/ | |
383 | Int_t v0lab=cp->GetFirstDaughter(), blab=cp->GetLastDaughter(); | |
384 | if (v0lab==blab) continue; | |
385 | if (v0lab<0) continue; | |
386 | if (blab<0) continue; | |
387 | ||
0555741a | 388 | TParticle *p0=gAlice->GetMCApp()->Particle(v0lab); |
389 | TParticle *bp=gAlice->GetMCApp()->Particle(blab); | |
ca28c5f5 | 390 | if ((p0->GetPdgCode()!=kLambda0) && (p0->GetPdgCode()!=kLambda0Bar)) { |
391 | TParticle *p=p0; p0=bp; bp=p; | |
392 | Int_t i=v0lab; v0lab=blab; blab=i; | |
393 | if ((p0->GetPdgCode()!=kLambda0) && (p0->GetPdgCode()!=kLambda0Bar)) | |
394 | continue; | |
395 | } | |
396 | ||
397 | /** is the bachelor "good" ? **/ | |
398 | Int_t i; | |
399 | for (i=0; i<ngt; i++) if (label[i]==blab) break; | |
400 | if (i==ngt) continue; | |
401 | ||
402 | /** is the V0 "good" ? **/ | |
403 | Int_t plab=p0->GetFirstDaughter(), nlab=p0->GetLastDaughter(); | |
404 | if (nlab==plab) continue; | |
405 | if (nlab<0) continue; | |
406 | if (plab<0) continue; | |
407 | ||
408 | for (i=0; i<ngt; i++) if (label[i]==nlab) break; | |
409 | if (i==ngt) continue; | |
410 | for (i=0; i<ngt; i++) if (label[i]==plab) break; | |
411 | if (i==ngt) continue; | |
412 | ||
413 | /*** fiducial volume ***/ | |
414 | Double_t x=bp->Vx(), y=bp->Vy(), r2=x*x+y*y; //bachelor | |
415 | if (r2<r2min) continue; | |
416 | if (r2>r2max) continue; | |
0555741a | 417 | TParticle *pp=gAlice->GetMCApp()->Particle(plab); |
ca28c5f5 | 418 | x=pp->Vx(); y=pp->Vy(); r2=x*x+y*y; //V0 |
419 | if (r2<r2min) continue; | |
420 | if (r2>r2max) continue; | |
421 | ||
0555741a | 422 | if (gAlice->GetMCApp()->Particle(plab)->GetPDG()->Charge() < 0.) { |
ca28c5f5 | 423 | i=plab; plab=nlab; nlab=i; |
424 | } | |
425 | ||
426 | gc[nc].code=code; | |
427 | gc[nc].plab=plab; gc[nc].nlab=nlab; gc[nc].blab=blab; | |
428 | gc[nc].px=cp->Px(); gc[nc].py=cp->Py(); gc[nc].pz=cp->Pz(); | |
429 | gc[nc].x=bp->Vx(); gc[nc].y=bp->Vy(); gc[nc].z=bp->Vz(); | |
430 | nc++; | |
431 | ||
432 | } | |
433 | ||
566abf75 | 434 | delete rl; |
ca28c5f5 | 435 | |
436 | return nc; | |
437 | } |