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0c6af5c9 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-2003, 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 | **************************************************************************/ | |
d531b7a1 | 15 | #include "AliITSVertexerZ.h" |
0c6af5c9 | 16 | #include<TBranch.h> |
7299b7a8 | 17 | #include<TClonesArray.h> |
0c6af5c9 | 18 | #include<TH1.h> |
d531b7a1 | 19 | #include <TString.h> |
0c6af5c9 | 20 | #include<TTree.h> |
308c2f7c | 21 | #include "AliESDVertex.h" |
32e63e47 | 22 | #include "AliITSgeomTGeo.h" |
d531b7a1 | 23 | #include "AliITSRecPoint.h" |
b21c1af0 | 24 | #include "AliITSRecPointContainer.h" |
7299b7a8 | 25 | #include "AliITSZPoint.h" |
0c6af5c9 | 26 | |
27 | ///////////////////////////////////////////////////////////////// | |
28 | // this class implements a fast method to determine | |
29 | // the Z coordinate of the primary vertex | |
30 | // for p-p collisions it seems to give comparable or better results | |
31 | // with respect to what obtained with AliITSVertexerPPZ | |
32 | // It can be used successfully with Pb-Pb collisions | |
33 | //////////////////////////////////////////////////////////////// | |
34 | ||
fe7d86eb | 35 | using std::endl; |
36 | using std::cout; | |
0c6af5c9 | 37 | ClassImp(AliITSVertexerZ) |
38 | ||
39 | ||
40 | ||
41 | //______________________________________________________________________ | |
8221b41b | 42 | AliITSVertexerZ::AliITSVertexerZ():AliITSVertexer(), |
43 | fFirstL1(0), | |
44 | fLastL1(0), | |
45 | fFirstL2(0), | |
46 | fLastL2(0), | |
47 | fDiffPhiMax(0), | |
8221b41b | 48 | fZFound(0), |
49 | fZsig(0.), | |
50 | fZCombc(0), | |
8221b41b | 51 | fLowLim(0.), |
52 | fHighLim(0.), | |
53 | fStepCoarse(0), | |
8221b41b | 54 | fTolerance(0.), |
7299b7a8 | 55 | fMaxIter(0), |
1e6316d8 | 56 | fWindowWidth(0), |
57 | fSearchForPileup(kTRUE) | |
58 | { | |
0c6af5c9 | 59 | // Default constructor |
7299b7a8 | 60 | SetDiffPhiMax(); |
61 | SetFirstLayerModules(); | |
62 | SetSecondLayerModules(); | |
63 | SetLowLimit(); | |
64 | SetHighLimit(); | |
65 | SetBinWidthCoarse(); | |
66 | SetTolerance(); | |
67 | SetPPsetting(); | |
6fd990e3 | 68 | ConfigIterations(); |
7299b7a8 | 69 | SetWindowWidth(); |
0c6af5c9 | 70 | } |
71 | ||
72 | //______________________________________________________________________ | |
308c2f7c | 73 | AliITSVertexerZ::AliITSVertexerZ(Float_t x0, Float_t y0):AliITSVertexer(), |
8221b41b | 74 | fFirstL1(0), |
75 | fLastL1(0), | |
76 | fFirstL2(0), | |
77 | fLastL2(0), | |
78 | fDiffPhiMax(0), | |
8221b41b | 79 | fZFound(0), |
80 | fZsig(0.), | |
81 | fZCombc(0), | |
8221b41b | 82 | fLowLim(0.), |
83 | fHighLim(0.), | |
84 | fStepCoarse(0), | |
8221b41b | 85 | fTolerance(0.), |
7299b7a8 | 86 | fMaxIter(0), |
1e6316d8 | 87 | fWindowWidth(0), |
88 | fSearchForPileup(kTRUE) | |
89 | { | |
0c6af5c9 | 90 | // Standard Constructor |
91 | SetDiffPhiMax(); | |
0c6af5c9 | 92 | SetFirstLayerModules(); |
93 | SetSecondLayerModules(); | |
0c6af5c9 | 94 | SetLowLimit(); |
95 | SetHighLimit(); | |
96 | SetBinWidthCoarse(); | |
0c6af5c9 | 97 | SetTolerance(); |
ecc64c3f | 98 | SetPPsetting(); |
6fd990e3 | 99 | ConfigIterations(); |
7299b7a8 | 100 | SetWindowWidth(); |
60b9526b | 101 | SetVtxStart((Double_t)x0,(Double_t)y0,0.); |
0c6af5c9 | 102 | |
103 | } | |
104 | ||
0c6af5c9 | 105 | //______________________________________________________________________ |
106 | AliITSVertexerZ::~AliITSVertexerZ() { | |
ecc64c3f | 107 | // Destructor |
108 | delete fZCombc; | |
0c6af5c9 | 109 | } |
110 | ||
6fd990e3 | 111 | //______________________________________________________________________ |
112 | void AliITSVertexerZ::ConfigIterations(Int_t noiter,Float_t *ptr){ | |
113 | // configure the iterative procedure to gain efficiency for | |
114 | // pp events with very low multiplicity | |
bf2e0ad4 | 115 | Float_t defaults[5]={0.02,0.05,0.1,0.2,0.3}; |
6fd990e3 | 116 | fMaxIter=noiter; |
117 | if(noiter>5){ | |
118 | Error("ConfigIterations","Maximum number of iterations is 5\n"); | |
119 | fMaxIter=5; | |
120 | } | |
121 | for(Int_t j=0;j<5;j++)fPhiDiffIter[j]=defaults[j]; | |
122 | if(ptr)for(Int_t j=0;j<fMaxIter;j++)fPhiDiffIter[j]=ptr[j]; | |
123 | } | |
124 | ||
debb3dde | 125 | //______________________________________________________________________ |
8c32ba44 | 126 | Int_t AliITSVertexerZ::GetPeakRegion(TH1F*h, Int_t &binmin, Int_t &binmax){ |
debb3dde | 127 | // Finds a region around a peak in the Z histogram |
128 | // Case of 2 peaks is treated | |
129 | Int_t imax=h->GetNbinsX(); | |
130 | Float_t maxval=0; | |
131 | Int_t bi1=h->GetMaximumBin(); | |
132 | Int_t bi2=0; | |
133 | for(Int_t i=imax;i>=1;i--){ | |
134 | if(h->GetBinContent(i)>maxval){ | |
135 | maxval=h->GetBinContent(i); | |
136 | bi2=i; | |
137 | } | |
138 | } | |
139 | Int_t npeaks=0; | |
140 | ||
141 | if(bi1==bi2){ | |
142 | binmin=bi1-3; | |
143 | binmax=bi1+3; | |
144 | npeaks=1; | |
145 | }else{ | |
146 | TH1F *copy = new TH1F(*h); | |
147 | copy->SetBinContent(bi1,0.); | |
148 | copy->SetBinContent(bi2,0.); | |
149 | Int_t l1=TMath::Max(bi1-3,1); | |
150 | Int_t l2=TMath::Min(bi1+3,h->GetNbinsX()); | |
151 | Float_t cont1=copy->Integral(l1,l2); | |
152 | Int_t ll1=TMath::Max(bi2-3,1); | |
153 | Int_t ll2=TMath::Min(bi2+3,h->GetNbinsX()); | |
154 | Float_t cont2=copy->Integral(ll1,ll2); | |
155 | if(cont1>cont2){ | |
156 | binmin=l1; | |
157 | binmax=l2; | |
158 | npeaks=1; | |
159 | } | |
160 | if(cont2>cont1){ | |
161 | binmin=ll1; | |
162 | binmax=ll2; | |
163 | npeaks=1; | |
164 | } | |
165 | if(cont1==cont2){ | |
166 | binmin=l1; | |
167 | binmax=ll2; | |
168 | if(bi2-bi1==1) npeaks=1; | |
169 | else npeaks=2; | |
170 | } | |
171 | delete copy; | |
172 | } | |
173 | return npeaks; | |
174 | } | |
0c6af5c9 | 175 | //______________________________________________________________________ |
308c2f7c | 176 | AliESDVertex* AliITSVertexerZ::FindVertexForCurrentEvent(TTree *itsClusterTree){ |
d681bb2d | 177 | // Defines the AliESDVertex for the current event |
308c2f7c | 178 | VertexZFinder(itsClusterTree); |
6fd990e3 | 179 | Int_t ntrackl=0; |
180 | for(Int_t iteraz=0;iteraz<fMaxIter;iteraz++){ | |
181 | if(fCurrentVertex) ntrackl=fCurrentVertex->GetNContributors(); | |
182 | if(!fCurrentVertex || ntrackl==0 || ntrackl==-1){ | |
183 | Float_t diffPhiMaxOrig=fDiffPhiMax; | |
184 | fDiffPhiMax=GetPhiMaxIter(iteraz); | |
308c2f7c | 185 | VertexZFinder(itsClusterTree); |
6fd990e3 | 186 | fDiffPhiMax=diffPhiMaxOrig; |
187 | } | |
188 | } | |
1ff24d0a | 189 | if(fComputeMultiplicity) FindMultiplicity(itsClusterTree); |
6fd990e3 | 190 | return fCurrentVertex; |
191 | } | |
192 | ||
193 | //______________________________________________________________________ | |
308c2f7c | 194 | void AliITSVertexerZ::VertexZFinder(TTree *itsClusterTree){ |
6fd990e3 | 195 | // Defines the AliESDVertex for the current event |
0c6af5c9 | 196 | fCurrentVertex = 0; |
5279841d | 197 | Double_t startPos[3]={GetNominalPos()[0],GetNominalPos()[1],GetNominalPos()[2]}; |
198 | Double_t startCov[6]={GetNominalCov()[0],GetNominalCov()[1],GetNominalCov()[2], | |
199 | GetNominalCov()[3],GetNominalCov()[4],GetNominalCov()[5]}; | |
6b4d9537 | 200 | ResetVertex(); |
0c6af5c9 | 201 | TClonesArray *itsRec = 0; |
27167524 | 202 | // lc1 and gc1 are local and global coordinates for layer 1 |
54f95b99 | 203 | Float_t gc1[3]={0.,0.,0.}; // ; for(Int_t ii=0; ii<3; ii++) gc1[ii]=0.; |
ecc64c3f | 204 | // lc2 and gc2 are local and global coordinates for layer 2 |
54f95b99 | 205 | Float_t gc2[3]={0.,0.,0.}; //; for(Int_t ii=0; ii<3; ii++) gc2[ii]=0.; |
b21c1af0 | 206 | AliITSRecPointContainer* rpcont=AliITSRecPointContainer::Instance(); |
3457dd2d | 207 | rpcont->FetchClusters(0,itsClusterTree); |
b21c1af0 | 208 | if(!rpcont->IsSPDActive()){ |
fea0ad94 | 209 | AliWarning("Null pointer for RecPoints branch, vertex not calculated"); |
210 | ResetHistograms(); | |
5279841d | 211 | fCurrentVertex = new AliESDVertex(startPos,startCov,99999.,-2); |
fea0ad94 | 212 | return; |
213 | } | |
0c6af5c9 | 214 | |
0c6af5c9 | 215 | Int_t nrpL1 = 0; |
216 | Int_t nrpL2 = 0; | |
1cc75a0b | 217 | nrpL1=rpcont->GetNClustersInLayerFast(1); |
218 | nrpL2=rpcont->GetNClustersInLayerFast(2); | |
27167524 | 219 | |
0c6af5c9 | 220 | if(nrpL1 == 0 || nrpL2 == 0){ |
fea0ad94 | 221 | AliDebug(1,Form("No RecPoints in at least one SPD layer (%d %d)",nrpL1,nrpL2)); |
0c6af5c9 | 222 | ResetHistograms(); |
5279841d | 223 | fCurrentVertex = new AliESDVertex(startPos,startCov,99999.,-2); |
6fd990e3 | 224 | return; |
0c6af5c9 | 225 | } |
ecc64c3f | 226 | // Force a coarse bin size of 200 microns if the number of clusters on layer 2 |
227 | // is low | |
228 | if(nrpL2<fPPsetting[0])SetBinWidthCoarse(fPPsetting[1]); | |
ecc64c3f | 229 | // By default nbincoarse=(10+10)/0.01=2000 |
230 | Int_t nbincoarse = static_cast<Int_t>((fHighLim-fLowLim)/fStepCoarse); | |
ecc64c3f | 231 | if(fZCombc)delete fZCombc; |
232 | fZCombc = new TH1F("fZCombc","Z",nbincoarse,fLowLim,fLowLim+nbincoarse*fStepCoarse); | |
7299b7a8 | 233 | |
27167524 | 234 | /* Test the ffect of mutiple scatternig on error. Negligible |
7299b7a8 | 235 | // Multiple scattering |
236 | Float_t beta=1.,pmed=0.875; //pmed=875 MeV (for tracks with dphi<0.01 rad) | |
237 | Float_t beta2=beta*beta; | |
238 | Float_t p2=pmed*pmed; | |
239 | Float_t rBP=3; //Beam Pipe radius = 3cm | |
240 | Float_t dBP=0.08/35.3; // 800 um of Be | |
241 | Float_t dL1=0.01; //approx. 1% of radiation length | |
242 | Float_t theta2BP=14.1*14.1/(beta2*p2*1e6)*TMath::Abs(dBP); | |
243 | Float_t theta2L1=14.1*14.1/(beta2*p2*1e6)*TMath::Abs(dL1); | |
244 | */ | |
54f95b99 | 245 | Int_t nEntriesMod[kNSPDMod]; |
246 | TClonesArray* recpArr[kNSPDMod]; | |
247 | for(Int_t modul=0; modul<kNSPDMod; ++modul) { | |
248 | if(!fUseModule[modul]) { | |
249 | nEntriesMod[modul]=0; | |
250 | recpArr[modul]=0; | |
251 | } else { | |
252 | recpArr[modul]=rpcont->UncheckedGetClusters(modul); | |
253 | nEntriesMod[modul]=recpArr[modul]->GetEntriesFast(); | |
254 | } | |
255 | } | |
256 | ||
27167524 | 257 | Int_t maxdim=TMath::Min(nrpL1*nrpL2,50000); // temporary; to limit the size in PbPb |
f5f6da22 | 258 | static TClonesArray points("AliITSZPoint",maxdim); |
7299b7a8 | 259 | Int_t nopoints =0; |
27167524 | 260 | for(Int_t modul1= fFirstL1; modul1<=fLastL1;modul1++){ // Loop on modules of layer 1 |
8c42830a | 261 | if(!fUseModule[modul1]) continue; |
27167524 | 262 | UShort_t ladder=int(modul1/4)+1; // ladders are numbered starting from 1 |
54f95b99 | 263 | TClonesArray *prpl1=recpArr[modul1]; //rpcont->UncheckedGetClusters(modul1); |
264 | Int_t nrecp1 = nEntriesMod[modul1]; //prpl1->GetEntries(); | |
27167524 | 265 | for(Int_t j1=0;j1<nrecp1;j1++){ |
54f95b99 | 266 | AliITSRecPoint *recp1 = (AliITSRecPoint*)prpl1->At(j1); |
267 | recp1->GetGlobalXYZ(gc1); | |
308c2f7c | 268 | gc1[0]-=GetNominalPos()[0]; // Possible beam offset in the bending plane |
269 | gc1[1]-=GetNominalPos()[1]; // " " | |
27167524 | 270 | Float_t phi1 = TMath::ATan2(gc1[1],gc1[0]); |
54f95b99 | 271 | if(phi1<0)phi1+=TMath::TwoPi(); |
27167524 | 272 | for(Int_t ladl2=0 ; ladl2<fLadOnLay2*2+1;ladl2++){ |
273 | for(Int_t k=0;k<4;k++){ | |
274 | Int_t ladmod=fLadders[ladder-1]+ladl2; | |
32e63e47 | 275 | if(ladmod>AliITSgeomTGeo::GetNLadders(2)) ladmod=ladmod-AliITSgeomTGeo::GetNLadders(2); |
276 | Int_t modul2=AliITSgeomTGeo::GetModuleIndex(2,ladmod,k+1); | |
e917bef4 | 277 | if(modul2<0)continue; |
8c42830a | 278 | if(!fUseModule[modul2]) continue; |
54f95b99 | 279 | itsRec=recpArr[modul2]; // rpcont->UncheckedGetClusters(modul2); |
280 | Int_t nrecp2 = nEntriesMod[modul2]; // itsRec->GetEntries(); | |
27167524 | 281 | for(Int_t j2=0;j2<nrecp2;j2++){ |
54f95b99 | 282 | AliITSRecPoint *recp2 = (AliITSRecPoint*)itsRec->At(j2); |
283 | recp2->GetGlobalXYZ(gc2); | |
308c2f7c | 284 | gc2[0]-=GetNominalPos()[0]; |
285 | gc2[1]-=GetNominalPos()[1]; | |
27167524 | 286 | Float_t phi2 = TMath::ATan2(gc2[1],gc2[0]); |
54f95b99 | 287 | if(phi2<0)phi2+=TMath::TwoPi(); |
27167524 | 288 | |
289 | Float_t diff = TMath::Abs(phi2-phi1); | |
54f95b99 | 290 | if(diff>TMath::Pi())diff=TMath::TwoPi()-diff; |
27167524 | 291 | if(diff<fDiffPhiMax){ |
54f95b99 | 292 | Float_t r1=TMath::Sqrt(gc1[0]*gc1[0]+gc1[1]*gc1[1]); |
293 | Float_t zc1=gc1[2]; | |
294 | Float_t erz1=recp1->GetSigmaZ2(); | |
295 | Float_t r2=TMath::Sqrt(gc2[0]*gc2[0]+gc2[1]*gc2[1]); | |
296 | Float_t zc2=gc2[2]; | |
297 | Float_t erz2=recp2->GetSigmaZ2(); | |
27167524 | 298 | // Float_t tgth=(zc2[j]-zc1[i])/(r2-r1); // slope (used for multiple scattering) |
299 | Float_t zr0=(r2*zc1-r1*zc2)/(r2-r1); //Z @ null radius | |
54f95b99 | 300 | Float_t ezr0q=(r2*r2*erz1+r1*r1*erz2)/((r2-r1)*(r2-r1)); //error on Z @ null radius |
301 | /* | |
302 | // Multiple scattering | |
303 | ezr0q+=r1*r1*(1+tgth*tgth)*theta2L1/2; // multiple scattering in layer 1 | |
304 | ezr0q+=rBP*rBP*(1+tgth*tgth)*theta2BP/2; // multiple scattering in beam pipe | |
305 | */ | |
f5f6da22 | 306 | if(nopoints<maxdim) new(points[nopoints++])AliITSZPoint(zr0,ezr0q); |
27167524 | 307 | fZCombc->Fill(zr0); |
308 | } | |
309 | } | |
27167524 | 310 | } |
0c6af5c9 | 311 | } |
312 | } | |
313 | } | |
7299b7a8 | 314 | |
f5f6da22 | 315 | points.Sort(); |
7299b7a8 | 316 | |
6fd990e3 | 317 | Double_t contents = fZCombc->GetEntries()- fZCombc->GetBinContent(0)-fZCombc->GetBinContent(nbincoarse+1); |
318 | if(contents<1.){ | |
319 | // Warning("FindVertexForCurrentEvent","Insufficient number of rec. points\n"); | |
0c6af5c9 | 320 | ResetHistograms(); |
5279841d | 321 | fCurrentVertex = new AliESDVertex(startPos,startCov,99999.,-1); |
f5f6da22 | 322 | points.Clear(); |
6fd990e3 | 323 | return; |
0c6af5c9 | 324 | } |
ecc64c3f | 325 | |
326 | TH1F *hc = fZCombc; | |
ecc64c3f | 327 | |
ecc64c3f | 328 | |
8c42830a | 329 | if(hc->GetBinContent(hc->GetMaximumBin())<3)hc->Rebin(4); |
debb3dde | 330 | Int_t binmin,binmax; |
331 | Int_t nPeaks=GetPeakRegion(hc,binmin,binmax); | |
4be14da5 | 332 | if(nPeaks==2)AliDebug(2,"2 peaks found"); |
7299b7a8 | 333 | Float_t zm =0.; |
334 | Float_t ezm =0.; | |
335 | Float_t lim1 = hc->GetBinLowEdge(binmin); | |
336 | Float_t lim2 = hc->GetBinLowEdge(binmax)+hc->GetBinWidth(binmax); | |
4be14da5 | 337 | Float_t widthSR=lim2-lim1; |
7299b7a8 | 338 | |
339 | if(nPeaks ==1 && (lim2-lim1)<fWindowWidth){ | |
340 | Float_t c=(lim1+lim2)/2.; | |
341 | lim1=c-fWindowWidth/2.; | |
342 | lim2=c+fWindowWidth/2.; | |
ecc64c3f | 343 | } |
7299b7a8 | 344 | Int_t niter = 0, ncontr=0; |
345 | do { | |
346 | // symmetrization | |
347 | if(zm !=0.){ | |
348 | Float_t semilarg=TMath::Min((lim2-zm),(zm-lim1)); | |
349 | lim1=zm - semilarg; | |
350 | lim2=zm + semilarg; | |
0c6af5c9 | 351 | } |
7299b7a8 | 352 | |
353 | zm=0.; | |
354 | ezm=0.; | |
355 | ncontr=0; | |
896141ab | 356 | for(Int_t i =0; i<points.GetEntriesFast(); i++){ |
f5f6da22 | 357 | AliITSZPoint* p=(AliITSZPoint*)points.UncheckedAt(i); |
7299b7a8 | 358 | if(p->GetZ()>lim1 && p->GetZ()<lim2){ |
359 | Float_t deno = p->GetErrZ(); | |
360 | zm+=p->GetZ()/deno; | |
361 | ezm+=1./deno; | |
362 | ncontr++; | |
ecc64c3f | 363 | } |
364 | } | |
2b8b4286 | 365 | if(ezm>0) { |
366 | zm/=ezm; | |
367 | ezm=TMath::Sqrt(1./ezm); | |
368 | } | |
7299b7a8 | 369 | niter++; |
370 | } while(niter<10 && TMath::Abs((zm-lim1)-(lim2-zm))>fTolerance); | |
4be14da5 | 371 | if(nPeaks==2) ezm=widthSR; |
5279841d | 372 | Double_t position[3]={GetNominalPos()[0],GetNominalPos()[1],zm}; |
373 | Double_t covmatrix[6]={GetNominalCov()[0],0.,GetNominalCov()[2],0.,0.,ezm}; | |
374 | fCurrentVertex = new AliESDVertex(position,covmatrix,99999.,ncontr); | |
12e3ead8 | 375 | fCurrentVertex->SetTitle("vertexer: Z"); |
bf2e0ad4 | 376 | fCurrentVertex->SetDispersion(fDiffPhiMax); |
6b4d9537 | 377 | fNoVertices=1; |
f5f6da22 | 378 | points.Clear(); |
1e6316d8 | 379 | if(fSearchForPileup && ncontr>fMinTrackletsForPilup){ |
8c32ba44 | 380 | Float_t secPeakPos; |
381 | Int_t ncontr2=FindSecondPeak(fZCombc,binmin,binmax,secPeakPos); | |
382 | if(ncontr2>=fMinTrackletsForPilup){ | |
383 | fIsPileup=kTRUE; | |
6b4d9537 | 384 | fNoVertices=2; |
8c32ba44 | 385 | fZpuv=secPeakPos; |
386 | fNTrpuv=ncontr2; | |
6b4d9537 | 387 | AliESDVertex secondVert(secPeakPos,0.1,ncontr2); |
388 | fVertArray = new AliESDVertex[2]; | |
389 | fVertArray[0]=(*fCurrentVertex); | |
390 | fVertArray[1]=secondVert; | |
8c32ba44 | 391 | } |
2c3a7cd0 | 392 | } |
6b4d9537 | 393 | if(fNoVertices==1){ |
394 | fVertArray = new AliESDVertex[1]; | |
395 | fVertArray[0]=(*fCurrentVertex); | |
396 | } | |
397 | ||
0c6af5c9 | 398 | ResetHistograms(); |
6fd990e3 | 399 | return; |
0c6af5c9 | 400 | } |
401 | ||
8c32ba44 | 402 | //_____________________________________________________________________ |
f510fd70 | 403 | Int_t AliITSVertexerZ::FindSecondPeak(TH1F* h, Int_t binmin,Int_t binmax, Float_t& secPeakPos){ |
404 | // Resets bin contents between binmin and binmax and then search | |
405 | // for a second peak position | |
8c32ba44 | 406 | for(Int_t i=binmin-1;i<=binmax+1;i++){ |
407 | h->SetBinContent(i,0.); | |
408 | } | |
409 | Int_t secPeakBin=h->GetMaximumBin(); | |
410 | secPeakPos=h->GetBinCenter(secPeakBin); | |
70a3283c | 411 | Int_t secPeakCont=(Int_t)h->GetBinContent(secPeakBin); |
412 | secPeakCont+=(Int_t)h->GetBinContent(secPeakBin-1); | |
413 | secPeakCont+=(Int_t)h->GetBinContent(secPeakBin+1); | |
414 | secPeakCont+=(Int_t)h->GetBinContent(secPeakBin-2); | |
415 | secPeakCont+=(Int_t)h->GetBinContent(secPeakBin+2); | |
8c32ba44 | 416 | return secPeakCont; |
417 | } | |
418 | ||
0c6af5c9 | 419 | //_____________________________________________________________________ |
420 | void AliITSVertexerZ::ResetHistograms(){ | |
421 | // delete TH1 data members | |
422 | if(fZCombc)delete fZCombc; | |
0c6af5c9 | 423 | fZCombc = 0; |
0c6af5c9 | 424 | } |
425 | ||
0c6af5c9 | 426 | //________________________________________________________ |
427 | void AliITSVertexerZ::PrintStatus() const { | |
428 | // Print current status | |
429 | cout <<"=======================================================\n"; | |
430 | cout <<" First layer first and last modules: "<<fFirstL1<<", "; | |
431 | cout <<fLastL1<<endl; | |
432 | cout <<" Second layer first and last modules: "<<fFirstL2<<", "; | |
433 | cout <<fLastL2<<endl; | |
434 | cout <<" Max Phi difference: "<<fDiffPhiMax<<endl; | |
435 | cout <<"Limits for Z histograms: "<<fLowLim<<"; "<<fHighLim<<endl; | |
7299b7a8 | 436 | cout <<"Bin sizes for coarse z histos "<<fStepCoarse<<endl; |
0c6af5c9 | 437 | cout <<" Current Z "<<fZFound<<"; Z sig "<<fZsig<<endl; |
ecc64c3f | 438 | if(fZCombc){ |
439 | cout<<"fZCombc exists - entries="<<fZCombc->GetEntries()<<endl; | |
440 | } | |
441 | else{ | |
442 | cout<<"fZCombc does not exist\n"; | |
443 | } | |
0c6af5c9 | 444 | |
445 | cout <<"=======================================================\n"; | |
446 | } | |
447 |