PWGLF/RESONANCES/extra/AliXiStar.cxx

   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 ////////////////////////////////////////////////////////////////////////////////
  17 //
  18 //  This class is used to reconstruct the neutral Xi(1530) resonance.
  19 //  This class essentially combines charged Xi candidates from the Xi Vertexer
  20 //  with primary charged pions.
  21 //
  22 //  authors: Dhevan Gangadharan (dhevan.raja.gangadharan@cern.ch)
  23 //
  24 ////////////////////////////////////////////////////////////////////////////////
  25
  26
  27
  28 #include <iostream>
  29 #include <math.h>
  30 #include "TChain.h"
  31 #include "TFile.h"
  32 #include "TKey.h"
  33 #include "TObject.h"
  34 #include "TObjString.h"
  35 #include "TList.h"
  36 #include "TTree.h"
  37 #include "TH1F.h"
  38 #include "TH1D.h"
  39 #include "TH2D.h"
  40 #include "TH3D.h"
  41 #include "TProfile.h"
  42 #include "TCanvas.h"
  43
  44 #include "AliAnalysisTask.h"
  45 #include "AliAnalysisManager.h"
  46
  47
  48 #include "AliESDEvent.h"
  49 #include "AliESDInputHandler.h"
  50 #include "AliESDtrackCuts.h"
  51 #include "AliMCEventHandler.h"
  52 #include "AliMCEvent.h"
  53 #include "AliStack.h"
  54
  55 #include "AliAODEvent.h"
  56 #include "AliAODInputHandler.h"
  57 #include "AliAODMCParticle.h"
  58 #include "AliAODcascade.h"
  59 #include "AliESDcascade.h"
  60 #include "AliV0vertexer.h"
  61 #include "AliCascadeVertexer.h"
  62
  63 #include "AliXiStar.h"
  64
  65 #define PI 3.1415927
  66
  67
  68 // Author: Dhevan Gangadharan
  69
  70 ClassImp(AliXiStar)
  71
  72 //________________________________________________________________________
  73 AliXiStar::AliXiStar():
  74 AliAnalysisTaskSE(),
  75   fname(0),
  76   fAOD(0x0),
  77   fESD(0x0),
  78   fOutputList(0x0),
  79   fTrackCut(0x0),
  80   fPIDResponse(0x0),
  81   fEC(0x0),
  82   fEvt(0x0),
  83   fTempStruct(0x0),
  84   fZvertexBins(0),
  85   fEventsToMix(0),
  86   fMultBins(0),
  87   fMCcase(0),
  88   fAODcase(0),
  89   fEventCounter(0),
  90   fMaxDecayLength(0),
  91   fMassWindow(0),
  92   fTrueMassPr(0),
  93   fTrueMassPi(0),
  94   fTrueMassK(0),
  95   fTrueMassLam(0),
  96   fTrueMassXi(0),
  97   fESDTrack4(0x0),
  98   fXiTrack(0x0),
  99   fCutList(0)
 100 {
 101   // Default Constructor
 102   for (Int_t i=0; i<21; i++){
 103     fCovMatrix[i]=-99999.;
 104     if (i<12) fMultLimits[i] = 0;
 105   }
 106   for (Int_t i=0; i<kNCuts; i++){
 107     fDecayParameters[i]=0;
 108     for (Int_t j=0; j<kNCutVariations; j++){
 109       fCutValues[j][i]=0;
 110     }
 111   }
 112   //
 113   for (Int_t cv=0; cv<kNCutVariations; cv++){
 114     CutVar[cv].fXi=0x0;
 115     CutVar[cv].fXibar=0x0;
 116     CutVar[cv].fXiMinusPiPlus=0x0;
 117     CutVar[cv].fXiMinusPiMinus=0x0;
 118     CutVar[cv].fXiPlusPiPlus=0x0;
 119     CutVar[cv].fXiPlusPiMinus=0x0;
 120     //
 121     CutVar[cv].fXiMinusPiPlusbkg=0x0;
 122     CutVar[cv].fXiMinusPiMinusbkg=0x0;
 123     CutVar[cv].fXiPlusPiPlusbkg=0x0;
 124     CutVar[cv].fXiPlusPiMinusbkg=0x0;
 125     //
 126     CutVar[cv].fMCrecXi=0x0;
 127     CutVar[cv].fMCrecXibar=0x0;
 128     CutVar[cv].fMCrecXiMinusPiPlus=0x0;
 129     CutVar[cv].fMCrecXiPlusPiMinus=0x0;
 130   }
 131
 132 }
 133 //________________________________________________________________________
 134 AliXiStar::AliXiStar(const char *name, Bool_t AODdecision, Bool_t MCdecision, Int_t CutListOption)
 135   : AliAnalysisTaskSE(name),
 136     fname(name),
 137     fAOD(0x0),
 138     fESD(0x0),
 139     fOutputList(0x0),
 140     fTrackCut(0x0),
 141     fPIDResponse(0x0),
 142     fEC(0x0),
 143     fEvt(0x0),
 144     fTempStruct(0x0),
 145     fZvertexBins(0),
 146     fEventsToMix(0),
 147     fMultBins(0),
 148     fMCcase(MCdecision),
 149     fAODcase(AODdecision),
 150     fEventCounter(0),
 151     fMaxDecayLength(0),
 152     fMassWindow(0),
 153     fTrueMassPr(0),
 154     fTrueMassPi(0),
 155     fTrueMassK(0),
 156     fTrueMassLam(0),
 157     fTrueMassXi(0),
 158     fESDTrack4(0x0),
 159     fXiTrack(0x0),
 160     fCutList(CutListOption)
 161
 162 {
 163   // Main Constructor
 164   for (Int_t i=0; i<21; i++){
 165     fCovMatrix[i]=-99999.;
 166     if (i<12) fMultLimits[i] = 0;
 167   }
 168   for (Int_t i=0; i<kNCuts; i++){
 169     fDecayParameters[i]=0;
 170     for (Int_t j=0; j<kNCutVariations; j++){
 171       fCutValues[j][i]=0;
 172     }
 173   }
 174   //
 175   for (Int_t cv=0; cv<kNCutVariations; cv++){
 176     CutVar[cv].fXi=0x0;
 177     CutVar[cv].fXibar=0x0;
 178     CutVar[cv].fXiMinusPiPlus=0x0;
 179     CutVar[cv].fXiMinusPiMinus=0x0;
 180     CutVar[cv].fXiPlusPiPlus=0x0;
 181     CutVar[cv].fXiPlusPiMinus=0x0;
 182     //
 183     CutVar[cv].fXiMinusPiPlusbkg=0x0;
 184     CutVar[cv].fXiMinusPiMinusbkg=0x0;
 185     CutVar[cv].fXiPlusPiPlusbkg=0x0;
 186     CutVar[cv].fXiPlusPiMinusbkg=0x0;
 187     //
 188     CutVar[cv].fMCrecXi=0x0;
 189     CutVar[cv].fMCrecXibar=0x0;
 190     CutVar[cv].fMCrecXiMinusPiPlus=0x0;
 191     CutVar[cv].fMCrecXiPlusPiMinus=0x0;
 192   }
 193
 194
 195   // Define output slots here
 196   // Output slot #1
 197   DefineOutput(1, TList::Class());
 198
 199 }
 200 //________________________________________________________________________
 201 AliXiStar::AliXiStar(const AliXiStar &obj)
 202   : AliAnalysisTaskSE(obj.fname),
 203     fname(obj.fname),
 204     fAOD(obj.fAOD),
 205     fESD(obj.fESD),
 206     fOutputList(obj.fOutputList),
 207     fTrackCut(obj.fTrackCut),
 208     fPIDResponse(obj.fPIDResponse),
 209     fEC(obj.fEC),
 210     fEvt(obj.fEvt),
 211     fTempStruct(obj.fTempStruct),
 212     fZvertexBins(obj.fZvertexBins),
 213     fEventsToMix(obj.fEventsToMix),
 214     fMultBins(obj.fMultBins),
 215     fMultLimits(),
 216     fMCcase(obj.fMCcase),
 217     fAODcase(obj.fAODcase),
 218     fEventCounter(obj.fEventCounter),
 219     fMaxDecayLength(obj.fMaxDecayLength),
 220     fMassWindow(obj.fMassWindow),
 221     fTrueMassPr(obj.fTrueMassPr),
 222     fTrueMassPi(obj.fTrueMassPi),
 223     fTrueMassK(obj.fTrueMassK),
 224     fTrueMassLam(obj.fTrueMassLam),
 225     fTrueMassXi(obj.fTrueMassXi),
 226     fESDTrack4(obj.fESDTrack4),
 227     fXiTrack(obj.fXiTrack),
 228     fCutList(obj.fCutList)
 229
 230 {
 231   // Copy constructor
 232   for (Int_t i=0; i<21; i++){
 233     fCovMatrix[i]=obj.fCovMatrix[i];
 234     if (i<12) fMultLimits[i]=obj.fMultLimits[i];
 235   }
 236   for (Int_t i=0; i<kNCuts; i++){
 237     fDecayParameters[i]=obj.fDecayParameters[i];
 238     for (Int_t j=0; j<kNCutVariations; j++){
 239       fCutValues[j][i]=obj.fCutValues[j][i];
 240     }
 241   }
 242
 243 }
 244 //________________________________________________________________________
 245 AliXiStar &AliXiStar::operator=(const AliXiStar &obj)
 246 {
 247   // Assignment operator
 248   if (this == &obj)
 249     return *this;
 250
 251   fname = obj.fname;
 252   fAOD = obj.fAOD;
 253   fESD = obj.fESD;
 254   fOutputList = obj.fOutputList;
 255   fTrackCut = obj.fTrackCut;
 256   fPIDResponse = obj.fPIDResponse;
 257   fEC = obj.fEC;
 258   fEvt = obj.fEvt;
 259   fTempStruct = obj.fTempStruct;
 260   fZvertexBins = obj.fZvertexBins;
 261   fEventsToMix = obj.fEventsToMix;
 262   fMultBins = obj.fMultBins;
 263   for (Int_t i=0; i<12; i++){
 264     fMultLimits[i]=obj.fMultLimits[i];
 265   }
 266   fMCcase = obj.fMCcase;
 267   fAODcase = obj.fAODcase;
 268   fEventCounter = obj.fEventCounter;
 269   fMaxDecayLength = obj.fMaxDecayLength;
 270   fMassWindow = obj.fMassWindow;
 271   for (Int_t i=0; i<21; i++){
 272     fCovMatrix[i]=obj.fCovMatrix[i];
 273   }
 274   fTrueMassPr = obj.fTrueMassPr;
 275   fTrueMassPi = obj.fTrueMassPi;
 276   fTrueMassK = obj.fTrueMassK;
 277   fTrueMassLam = obj.fTrueMassLam;
 278   fTrueMassXi = obj.fTrueMassXi;
 279   fESDTrack4 = obj.fESDTrack4;
 280   fXiTrack = obj.fXiTrack;
 281   fCutList = obj.fCutList;
 282
 283   for (Int_t i=0; i<kNCuts; i++){
 284     fDecayParameters[i]=obj.fDecayParameters[i];
 285     for (Int_t j=0; j<kNCutVariations; j++){
 286       fCutValues[j][i]=obj.fCutValues[j][i];
 287     }
 288   }
 289
 290
 291   return (*this);
 292 }
 293 //________________________________________________________________________
 294 AliXiStar::~AliXiStar()
 295 {
 296   // Destructor
 297   if(fAOD) delete fAOD;
 298   if(fESD) delete fESD;
 299   if(fOutputList) delete fOutputList;
 300   if(fTrackCut) delete fTrackCut;
 301   if(fPIDResponse) delete fPIDResponse;
 302   if(fEC) delete fEC;
 303   if(fEvt) delete fEvt;
 304   if(fTempStruct) delete fTempStruct;
 305   if(fESDTrack4) delete fESDTrack4;
 306   if(fXiTrack) delete fXiTrack;
 307
 308   for (Int_t cv=0; cv<kNCutVariations; cv++){
 309     if(CutVar[cv].fXi) delete CutVar[cv].fXi;
 310     if(CutVar[cv].fXibar) delete CutVar[cv].fXibar;
 311     if(CutVar[cv].fXiMinusPiPlus) delete CutVar[cv].fXiMinusPiPlus;
 312     if(CutVar[cv].fXiMinusPiMinus) delete CutVar[cv].fXiMinusPiMinus;
 313     if(CutVar[cv].fXiPlusPiPlus) delete CutVar[cv].fXiPlusPiPlus;
 314     if(CutVar[cv].fXiPlusPiMinus) delete CutVar[cv].fXiPlusPiMinus;
 315     //
 316     if(CutVar[cv].fXiMinusPiPlusbkg) delete CutVar[cv].fXiMinusPiPlusbkg;
 317     if(CutVar[cv].fXiMinusPiMinusbkg) delete CutVar[cv].fXiMinusPiMinusbkg;
 318     if(CutVar[cv].fXiPlusPiPlusbkg) delete CutVar[cv].fXiPlusPiPlusbkg;
 319     if(CutVar[cv].fXiPlusPiMinusbkg) delete CutVar[cv].fXiPlusPiMinusbkg;
 320     //
 321     if(CutVar[cv].fMCrecXi) delete CutVar[cv].fMCrecXi;
 322     if(CutVar[cv].fMCrecXibar) delete CutVar[cv].fMCrecXibar;
 323     if(CutVar[cv].fMCrecXiMinusPiPlus) delete CutVar[cv].fMCrecXiMinusPiPlus;
 324     if(CutVar[cv].fMCrecXiPlusPiMinus) delete CutVar[cv].fMCrecXiPlusPiMinus;
 325   }
 326
 327 }
 328 //________________________________________________________________________
 329 void AliXiStar::XiStarInit()
 330 {
 331   //
 332   //Inits cuts and analysis settings
 333   //
 334
 335   fEventCounter=0;// event counter initialization
 336   cout<<"AliXiStar XiStarInit() call"<<endl;
 337
 338
 339   ///////////////////////////////////////////////
 340   // Track Cuts for ESD analysis
 341   fTrackCut = new AliESDtrackCuts();
 342   fTrackCut->SetPtRange(.15,1000);
 343   fTrackCut->SetAcceptKinkDaughters(kFALSE);
 344   //fTrackCut->SetMinNClustersTPC(70);
 345   fTrackCut->SetRequireTPCRefit(kTRUE);
 346   ////////////////////////////////////////////////
 347
 348   fZvertexBins = 20;
 349   fMultBins = 11;// This must also be set in AliXiStar.h
 350   if(fMCcase) fEventsToMix = 0;
 351   else fEventsToMix = 40;
 352
 353   // multiplicity edges for event mixing bins
 354   fMultLimits[0]=0, fMultLimits[1]=5, fMultLimits[2]=10, fMultLimits[3]=15, fMultLimits[4]=20, fMultLimits[5]=25;
 355   fMultLimits[6]=30, fMultLimits[7]=35, fMultLimits[8]=40, fMultLimits[9]=45, fMultLimits[10]=50, fMultLimits[11]=150;
 356
 357
 358   fEC = new AliXiStarEventCollection **[fZvertexBins];
 359   for(unsigned short i=0; i<fZvertexBins; i++){
 360
 361     fEC[i] = new AliXiStarEventCollection *[fMultBins];
 362
 363     for(unsigned short j=0; j<fMultBins; j++){
 364
 365       fEC[i][j] = new AliXiStarEventCollection(fEventsToMix+1);
 366     }
 367   }
 368
 369
 370   fTempStruct = new AliXiStarTrackStruct[kNbinsM];
 371
 372   fESDTrack4 = new AliESDtrack();
 373   fXiTrack = new AliESDtrack();
 374
 375
 376   fMaxDecayLength = 100.;
 377   fMassWindow = 0.006;
 378
 379   /////////////////////////////////////////////////////////////////////////////////////
 380   ///////////////////////
 381   // DecayParameters Key (number represents array index)
 382   // NclustersTPC: 0=proton, 1=pion first, 2=pion second, 3=pion third
 383   // DCAVtx: 4=proton, 5=pion first, 6=pion second, 7=lambda, 8=pion third
 384   // 9 = DCA proton-pion
 385   // 10 = DCA Lambda-pion
 386   // 11 = Rxy Lambda
 387   // 12 = Rxy Xi
 388   // 13 = Cos PA Lambda
 389   // 14 = Cos PA Xi
 390
 391   // Set Standard Reconstruction cut values
 392   fCutValues[0][0] = 70; fCutValues[0][1] = 70; fCutValues[0][2] = 70; fCutValues[0][3] = 70;
 393   fCutValues[0][4] = 0.04; fCutValues[0][5] = 0.04; fCutValues[0][6] = 0.05; fCutValues[0][7] = 0.07; fCutValues[0][8] = 2.0;
 394   fCutValues[0][9] = 1.6;
 395   fCutValues[0][10] = 1.6;
 396   fCutValues[0][11] = 1.4;
 397   fCutValues[0][12] = 0.8;
 398   fCutValues[0][13] = 0.97;
 399   fCutValues[0][14] = 0.97;
 400   for(int cv=1; cv<kNCutVariations; cv++){
 401     for(int ct=0; ct<kNCuts; ct++){
 402       fCutValues[cv][ct] = fCutValues[0][ct];
 403     }
 404   }
 405   // Set Systematic Variations
 406   fCutValues[1][0] = 80; fCutValues[1][1] = 80; fCutValues[1][2] = 80; fCutValues[1][3] = 80;// 80
 407   fCutValues[2][4] = 0.104;// 0.104
 408   fCutValues[3][5] = 0.104;// 0.104
 409   fCutValues[4][6] = 0.08;// 0.08
 410   fCutValues[5][7] = 0.1;// 0.1
 411   fCutValues[6][8] = 1.0;// 1.0
 412   fCutValues[7][9] = 0.94;// 0.94
 413   fCutValues[8][10] = 1.41;// 1.41
 414   fCutValues[9][11] = 4.39;// 4.39
 415   fCutValues[10][12] = 0.95;// 0.95
 416   fCutValues[11][13] = 0.99;// 0.99
 417   fCutValues[12][14] = 0.985;// 0.085
 418
 419
 420
 421
 422
 423   // PDG mass values
 424   fTrueMassPr=.93827, fTrueMassPi=.13957, fTrueMassK=.493677, fTrueMassLam=1.11568, fTrueMassXi=1.32171;
 425
 426   // The following CovMatrix is set so that PropogateToDCA() ignores track errors. Only used to propagate Xi to third pion for XiStar reconstruction
 427   for(Int_t i=0; i<21; i++) fCovMatrix[i]=0;
 428   fCovMatrix[0]=1, fCovMatrix[2]=1, fCovMatrix[5]=1, fCovMatrix[9]=1, fCovMatrix[14]=1, fCovMatrix[20]=1;
 429
 430
 431 }
 432 //________________________________________________________________________
 433 void AliXiStar::UserCreateOutputObjects()
 434 {
 435
 436   XiStarInit();// Initialize settings
 437
 438   // Create histograms
 439   fOutputList = new TList();
 440   fOutputList->SetOwner();
 441
 442   TH3F *fVertexDist1 = new TH3F("fVertexDist1","Vertex Distribution",20,-1,1, 20,-1,1, 600,-30,30);
 443   fVertexDist1->GetXaxis()->SetTitle("X Vertex (cm)");
 444   fVertexDist1->GetYaxis()->SetTitle("Y Vertex (cm)");
 445   fVertexDist1->GetZaxis()->SetTitle("Z Vertex (cm)");
 446   fOutputList->Add(fVertexDist1);
 447
 448   TH3F *fVertexDist3 = new TH3F("fVertexDist3","Vertex Distribution",20,-1,1, 20,-1,1, 600,-30,30);
 449   fVertexDist3->GetXaxis()->SetTitle("X Vertex (cm)");
 450   fVertexDist3->GetYaxis()->SetTitle("Y Vertex (cm)");
 451   fVertexDist3->GetZaxis()->SetTitle("Z Vertex (cm)");
 452   fOutputList->Add(fVertexDist3);
 453
 454   TH2F *fDCADist = new TH2F("fDCADist","DCA distribution",kNbinsM,-.5,kNbinsM-.5, 100,0,10);
 455   fOutputList->Add(fDCADist);
 456
 457
 458   TH3F *fMultDist3d = new TH3F("fMultDist3d","Multiplicity Distribution",kNbinsM,-.5,kNbinsM-.5, kNbinsM,-.5,kNbinsM-.5, kNbinsM,-.5,kNbinsM-.5);
 459   fMultDist3d->GetXaxis()->SetTitle("Multiplicity");
 460   fMultDist3d->GetYaxis()->SetTitle("Positive Multiplicity");
 461   fMultDist3d->GetZaxis()->SetTitle("Negative Multiplicity");
 462   fMultDist3d->SetMarkerStyle(kFullCircle);
 463   fOutputList->Add(fMultDist3d);
 464
 465
 466   TH1F *fMultDist1 = new TH1F("fMultDist1","Multiplicity Distribution",kNbinsM,-.5,kNbinsM-.5);
 467   fMultDist1->GetXaxis()->SetTitle("Multiplicity");
 468   fOutputList->Add(fMultDist1);
 469
 470   TH1F *fMultDist2 = new TH1F("fMultDist2","Multiplicity Distribution",kNbinsM,-.5,kNbinsM-.5);
 471   fMultDist2->GetXaxis()->SetTitle("Multiplicity");
 472   fOutputList->Add(fMultDist2);
 473
 474   TH1F *fMultDist3 = new TH1F("fMultDist3","Multiplicity Distribution",kNbinsM,-.5,kNbinsM-.5);
 475   fMultDist3->GetXaxis()->SetTitle("Multiplicity");
 476   fOutputList->Add(fMultDist3);
 477
 478   TH1F *fMultDist4 = new TH1F("fMultDist4","Multiplicity Distribution",kNbinsM,-.5,kNbinsM-.5);
 479   fMultDist4->GetXaxis()->SetTitle("Multiplicity");
 480   fOutputList->Add(fMultDist4);
 481
 482   TH1F *fMultDist5 = new TH1F("fMultDist5","Multiplicity Distribution",kNbinsM,-.5,kNbinsM-.5);
 483   fMultDist5->GetXaxis()->SetTitle("Multiplicity");
 484   fOutputList->Add(fMultDist5);
 485
 486
 487   TH3F *fPtEtaDist = new TH3F("fPtEtaDist","PtEtaDist",2,-1.1,1.1, 300,0,3., 28,-1.4,1.4);
 488   fOutputList->Add(fPtEtaDist);
 489
 490   TH3F *fPhiPtDist = new TH3F("fPhiPtDist","PhiPtDist",2,-1.1,1.1, 120,0,2*PI, 300,0,3.);
 491   fOutputList->Add(fPhiPtDist);
 492
 493
 494   for(Int_t cv=0; cv<kNCutVariations; cv++){
 495
 496     if(cv==0){
 497       TString *nameXi=new TString("fXi_");
 498       TString *nameXibar=new TString("fXibar_");
 499       *nameXi += cv;
 500       *nameXibar += cv;
 501       CutVar[cv].fXi = new TH3F(nameXi->Data(),"Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.2,1.4);
 502       fOutputList->Add(CutVar[cv].fXi);
 503       CutVar[cv].fXibar = new TH3F(nameXibar->Data(),"Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.2,1.4);
 504       fOutputList->Add(CutVar[cv].fXibar);
 505       //
 506       TString *nameMCrecXi = new TString("fMCrecXi_");
 507       TString *nameMCrecXibar = new TString("fMCrecXi_");
 508       *nameMCrecXi += cv;
 509       *nameMCrecXibar += cv;
 510       CutVar[cv].fMCrecXi = new TH3F(nameMCrecXi->Data(),"Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.2,1.4);
 511       CutVar[cv].fMCrecXibar = new TH3F(nameMCrecXibar->Data(),"Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.2,1.4);
 512       fOutputList->Add(CutVar[cv].fMCrecXi);
 513       fOutputList->Add(CutVar[cv].fMCrecXibar);
 514     }
 515     //
 516     TString *nameXiMinusPiPlus = new TString("fXiMinusPiPlus_");
 517     TString *nameXiMinusPiMinus = new TString("fXiMinusPiMinus_");
 518     TString *nameXiPlusPiPlus = new TString("fXiPlusPiPlus_");
 519     TString *nameXiPlusPiMinus = new TString("fXiPlusPiMinus_");
 520     TString *nameXiMinusPiPlusbkg = new TString("fXiMinusPiPlusbkg_");
 521     TString *nameXiMinusPiMinusbkg = new TString("fXiMinusPiMinusbkg_");
 522     TString *nameXiPlusPiPlusbkg = new TString("fXiPlusPiPlusbkg_");
 523     TString *nameXiPlusPiMinusbkg = new TString("fXiPlusPiMinusbkg_");
 524     *nameXiMinusPiPlus += cv;
 525     *nameXiMinusPiMinus += cv;
 526     *nameXiPlusPiPlus += cv;
 527     *nameXiPlusPiMinus += cv;
 528     *nameXiMinusPiPlusbkg += cv;
 529     *nameXiMinusPiMinusbkg += cv;
 530     *nameXiPlusPiPlusbkg += cv;
 531     *nameXiPlusPiMinusbkg += cv;
 532     CutVar[cv].fXiMinusPiPlus  = new TH3F(nameXiMinusPiPlus->Data(),"Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.4,1.6);
 533     CutVar[cv].fXiMinusPiMinus = new TH3F(nameXiMinusPiMinus->Data(),"Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.4,1.6);
 534     CutVar[cv].fXiPlusPiPlus   = new TH3F(nameXiPlusPiPlus->Data(),"Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.4,1.6);
 535     CutVar[cv].fXiPlusPiMinus  = new TH3F(nameXiPlusPiMinus->Data(),"Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.4,1.6);
 536     CutVar[cv].fXiMinusPiPlusbkg  = new TH3F(nameXiMinusPiPlusbkg->Data(),"Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.4,1.6);
 537     CutVar[cv].fXiMinusPiMinusbkg = new TH3F(nameXiMinusPiMinusbkg->Data(),"Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.4,1.6);
 538     CutVar[cv].fXiPlusPiPlusbkg   = new TH3F(nameXiPlusPiPlusbkg->Data(),"Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.4,1.6);
 539     CutVar[cv].fXiPlusPiMinusbkg  = new TH3F(nameXiPlusPiMinusbkg->Data(),"Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.4,1.6);
 540
 541     fOutputList->Add(CutVar[cv].fXiMinusPiPlus);
 542     fOutputList->Add(CutVar[cv].fXiMinusPiMinus);
 543     fOutputList->Add(CutVar[cv].fXiPlusPiPlus);
 544     fOutputList->Add(CutVar[cv].fXiPlusPiMinus);
 545     fOutputList->Add(CutVar[cv].fXiMinusPiPlusbkg);
 546     fOutputList->Add(CutVar[cv].fXiMinusPiMinusbkg);
 547     fOutputList->Add(CutVar[cv].fXiPlusPiPlusbkg);
 548     fOutputList->Add(CutVar[cv].fXiPlusPiMinusbkg);
 549     //
 550
 551
 552     TString *nameMCrecXiMinusPiPlus = new TString("fMCrecXiMinusPiPlus_");
 553     TString *nameMCrecXiPlusPiMinus = new TString("fMCrecXiPlusPiMinus_");
 554     *nameMCrecXiMinusPiPlus += cv;
 555     *nameMCrecXiPlusPiMinus += cv;
 556     CutVar[cv].fMCrecXiMinusPiPlus  = new TH3F(nameMCrecXiMinusPiPlus->Data(),"Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.4,1.6);
 557     CutVar[cv].fMCrecXiPlusPiMinus  = new TH3F(nameMCrecXiPlusPiMinus->Data(),"Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.4,1.6);
 558     fOutputList->Add(CutVar[cv].fMCrecXiMinusPiPlus);
 559     fOutputList->Add(CutVar[cv].fMCrecXiPlusPiMinus);
 560     //
 561
 562     /*
 563     CutVar[cv].fMCrecXiStarxiy = new TH2F("fMCrecXiStarxiy","y distribution",80,-2,2, 80,-2,2);
 564     CutVar[cv].fMCrecXiStarpiony = new TH2F("fMCrecXiStarpiony","y distribution",80,-2,2, 80,-2,2);
 565     fOutputList->Add(CutVar[cv].fMCrecXiStarxiy);
 566     fOutputList->Add(CutVar[cv].fMCrecXiStarpiony);
 567     CutVar[cv].fMCrecXilambday = new TH2F("fMCrecXilambday","y distribution",80,-2,2, 80,-2,2);
 568     CutVar[cv].fMCrecXipiony = new TH2F("fMCrecXipiony","y distribution",80,-2,2, 80,-2,2);
 569     fOutputList->Add(CutVar[cv].fMCrecXilambday);
 570     fOutputList->Add(CutVar[cv].fMCrecXipiony);
 571     CutVar[cv].fMCrecLamprotony = new TH2F("fMCrecLamprotony","y distribution",80,-2,2, 80,-2,2);
 572     CutVar[cv].fMCrecLampiony = new TH2F("fMCrecLampiony","y distribution",80,-2,2, 80,-2,2);
 573     fOutputList->Add(CutVar[cv].fMCrecLamprotony);
 574     fOutputList->Add(CutVar[cv].fMCrecLampiony);
 575     */
 576   }
 577
 578
 579
 580
 581   //////////////////////
 582   // MC input histos
 583   TH3F *fMCinputXiStar = new TH3F("fMCinputXiStar","Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.4,1.6);
 584   TH3F *fMCinputXiStarbar = new TH3F("fMCinputXiStarbar","Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.4,1.6);
 585   fOutputList->Add(fMCinputXiStar);
 586   fOutputList->Add(fMCinputXiStarbar);
 587
 588   TH3F *fMCinputXi = new TH3F("fMCinputXi","Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.2,1.4);
 589   TH3F *fMCinputXibar = new TH3F("fMCinputXibar","Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.2,1.4);
 590   fOutputList->Add(fMCinputXi);
 591   fOutputList->Add(fMCinputXibar);
 592
 593   //
 594
 595   TH3F *fMCinputTotalXiStar1 = new TH3F("fMCinputTotalXiStar1","Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.4,1.6);
 596   TH3F *fMCinputTotalXiStarbar1 = new TH3F("fMCinputTotalXiStarbar1","Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.4,1.6);
 597   fOutputList->Add(fMCinputTotalXiStar1);
 598   fOutputList->Add(fMCinputTotalXiStarbar1);
 599
 600   TH3F *fMCinputTotalXi1 = new TH3F("fMCinputTotalXi1","Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.2,1.4);
 601   TH3F *fMCinputTotalXibar1 = new TH3F("fMCinputTotalXibar1","Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.2,1.4);
 602   fOutputList->Add(fMCinputTotalXi1);
 603   fOutputList->Add(fMCinputTotalXibar1);
 604
 605   //
 606
 607   TH3F *fMCinputTotalXiStar3 = new TH3F("fMCinputTotalXiStar3","Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.4,1.6);
 608   TH3F *fMCinputTotalXiStarbar3 = new TH3F("fMCinputTotalXiStarbar3","Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.4,1.6);
 609   fOutputList->Add(fMCinputTotalXiStar3);
 610   fOutputList->Add(fMCinputTotalXiStarbar3);
 611
 612   TH3F *fMCinputTotalXi3 = new TH3F("fMCinputTotalXi3","Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.2,1.4);
 613   TH3F *fMCinputTotalXibar3 = new TH3F("fMCinputTotalXibar3","Invariant Mass Distribution", 100,0,10, 40,-2,2, 200,1.2,1.4);
 614   fOutputList->Add(fMCinputTotalXi3);
 615   fOutputList->Add(fMCinputTotalXibar3);
 616
 617   //
 618
 619   TH2F *fMCinputXiStarxiy = new TH2F("fMCinputXiStarxiy","y distribution",80,-2,2, 80,-2,2);
 620   TH2F *fMCinputXiStarpiony = new TH2F("fMCinputXiStarpiony","y distribution",80,-2,2, 80,-2,2);
 621   fOutputList->Add(fMCinputXiStarxiy);
 622   fOutputList->Add(fMCinputXiStarpiony);
 623   TH2F *fMCinputXilambday = new TH2F("fMCinputXilambday","y distribution",80,-2,2, 80,-2,2);
 624   TH2F *fMCinputXipiony = new TH2F("fMCinputXipiony","y distribution",80,-2,2, 80,-2,2);
 625   fOutputList->Add(fMCinputXilambday);
 626   fOutputList->Add(fMCinputXipiony);
 627   TH2F *fMCinputLamprotony = new TH2F("fMCinputLamprotony","y distribution",80,-2,2, 80,-2,2);
 628   TH2F *fMCinputLampiony = new TH2F("fMCinputLampiony","y distribution",80,-2,2, 80,-2,2);
 629   fOutputList->Add(fMCinputLamprotony);
 630   fOutputList->Add(fMCinputLampiony);
 631
 632
 633   ///////////////////////////////////
 634
 635   PostData(1, fOutputList);
 636 }
 637
 638 //________________________________________________________________________
 639 void AliXiStar::Exec(Option_t *)
 640 {
 641   // Main loop
 642   // Called for each event
 643   cout<<"===========  Event # "<<fEventCounter+1<<"  ==========="<<endl;
 644   fEventCounter++;
 645
 646   if(fAODcase) {cout<<"AODs not fully supported! Exiting event."<<endl; return;}
 647
 648   if(fAODcase) fAOD = dynamic_cast<AliAODEvent*> (InputEvent());
 649   else fESD = dynamic_cast<AliESDEvent*> (InputEvent());
 650
 651   if(fAODcase) {if (!fAOD) {Printf("ERROR: fAOD not available"); return;}}
 652   else {if (!fESD) {Printf("ERROR: fESD not available"); return;}}
 653
 654
 655   // ESD Trigger Cut
 656   if(!fAODcase){
 657     if(!(((AliInputEventHandler*)(AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler()))->IsEventSelected())) {cout<<"Event Rejected"<<endl; return;}
 658   }
 659
 660   ///////////////////////////////////////////////////////////
 661   const AliAODVertex *PrimaryVertexAOD;
 662   const AliESDVertex *PrimaryVertexESD;
 663
 664   AliAnalysisManager *man=AliAnalysisManager::GetAnalysisManager();
 665   AliInputEventHandler* inputHandler = (AliInputEventHandler*) (man->GetInputEventHandler());
 666   fPIDResponse = inputHandler->GetPIDResponse();
 667
 668
 669   TClonesArray *mcArray       = 0x0;
 670   //AliAODMCParticle *mcXi;
 671   //AliAODMCParticle *mcXiStarD2;
 672   //AliAODMCParticle *mcXiStar;
 673   AliMCEvent  *mcEvent        = 0x0;
 674   AliStack    *mcstack        = 0x0;
 675   TParticle   *MCLamD1esd     = 0x0;
 676   TParticle   *MCLamD2esd     = 0x0;
 677   TParticle   *MCLamesd       = 0x0;
 678   TParticle   *MCXiD2esd      = 0x0;
 679   TParticle   *MCXiesd        = 0x0;
 680   TParticle   *MCXiStarD2esd  = 0x0;
 681   TParticle   *MCXiStaresd    = 0x0;
 682
 683   Double_t px1,py1,pz1, px2,py2,pz2;
 684   Double_t p1sq,p2sq,e1,e2,angle;
 685   Double_t dca3d;
 686   Float_t dca2[2];
 687   Double_t xiVtx[3];//, xiStarVtx[3];
 688   Double_t xiP[3], xiStarP[3];
 689   Double_t xiStarMom;
 690   Double_t xiMass, xiStarMass;
 691   Double_t xiPt, xiStarPt;
 692   Double_t xiY, xiStarY;
 693   Double_t xiCharge;
 694   Double_t decayLengthXY;
 695   Double_t pDaughter1[3];
 696   Double_t pDaughter2[3];
 697   Double_t xDaughter1[3];
 698   Double_t xDaughter2[3];
 699   //
 700   Double_t bField=0;
 701   UInt_t status=0;
 702   Int_t positiveTracks=0, negativeTracks=0;
 703   Int_t myTracks=0;
 704   //
 705   Double_t primaryVtx[3]={0};
 706   Int_t mBin=0;
 707   Int_t zBin=0;
 708   Double_t zStep=2*10/Double_t(fZvertexBins), zStart=-10.;
 709   //
 710   Bool_t mcXiFilled=kFALSE;// So that mctracks are never used uninitialized
 711
 712   if(fMCcase){
 713     if(fAODcase){
 714       mcArray = (TClonesArray*)fAOD->FindListObject(AliAODMCParticle::StdBranchName());
 715       if(!mcArray){
 716         cout<<"No MC particle branch found"<<endl;
 717         return;
 718       }
 719     }else {
 720       mcEvent = MCEvent();
 721       if (!mcEvent) {Printf("ERROR: Could not retrieve MC event"); return;}
 722
 723       mcstack = mcEvent->Stack();
 724       if (!mcstack) {Printf("ERROR: Could not retrieve the stack"); return;}
 725     }
 726   }
 727
 728
 729   /////////////////////////////////////////////////
 730
 731
 732
 733   if(fAODcase){// AOD case
 734     ////////////////////////////////
 735     // Vertexing
 736     ((TH1F*)fOutputList->FindObject("fMultDist1"))->Fill(fAOD->GetNumberOfTracks());
 737     PrimaryVertexAOD = fAOD->GetPrimaryVertex();
 738     if(!PrimaryVertexAOD) return;
 739
 740     if(fMCcase){
 741       for (Int_t it = 0; it < mcArray->GetEntriesFast(); it++) {
 742         AliAODMCParticle *mcInputTrack = (AliAODMCParticle*)mcArray->At(it);
 743         if (!mcInputTrack) {
 744           Error("UserExec", "Could not receive track %d", it);
 745           continue;
 746         }
 747
 748         if(!mcInputTrack->IsPhysicalPrimary()) continue;
 749
 750         // Xi
 751         if(mcInputTrack->GetPdgCode() == +kXiCode) ((TH3F*)fOutputList->FindObject("fMCinputTotalXi1"))->Fill(mcInputTrack->Pt(), mcInputTrack->Y(), mcInputTrack->GetCalcMass());
 752         if(mcInputTrack->GetPdgCode() == -kXiCode) ((TH3F*)fOutputList->FindObject("fMCinputTotalXibar1"))->Fill(mcInputTrack->Pt(), mcInputTrack->Y(), mcInputTrack->GetCalcMass());
 753
 754         // XiStar
 755         if(mcInputTrack->GetPdgCode() == +kXiStarCode) ((TH3F*)fOutputList->FindObject("fMCinputTotalXiStar1"))->Fill(mcInputTrack->Pt(), mcInputTrack->Y(), mcInputTrack->GetCalcMass());
 756         if(mcInputTrack->GetPdgCode() == -kXiStarCode) ((TH3F*)fOutputList->FindObject("fMCinputTotalXiStarbar1"))->Fill(mcInputTrack->Pt(), mcInputTrack->Y(), mcInputTrack->GetCalcMass());
 757       }
 758     }
 759
 760
 761
 762     primaryVtx[0]=PrimaryVertexAOD->GetX(); primaryVtx[1]=PrimaryVertexAOD->GetY(); primaryVtx[2]=PrimaryVertexAOD->GetZ();
 763     ((TH3F*)fOutputList->FindObject("fVertexDist1"))->Fill(primaryVtx[0], primaryVtx[1], primaryVtx[2]);
 764     if(fabs(primaryVtx[2]) > 10.) return; // Z-Vertex Cut
 765     ((TH1F*)fOutputList->FindObject("fMultDist2"))->Fill(fAOD->GetNumberOfTracks());
 766
 767
 768     if(fAOD->IsPileupFromSPD()) return; // Reject Pile-up events
 769
 770     ((TH1F*)fOutputList->FindObject("fMultDist3"))->Fill(fAOD->GetNumberOfTracks());
 771     ((TH3F*)fOutputList->FindObject("fVertexDist3"))->Fill(primaryVtx[0], primaryVtx[1], primaryVtx[2]);
 772
 773     if(PrimaryVertexAOD->GetNContributors() >= 1) ((TH1F*)fOutputList->FindObject("fMultDist4"))->Fill(fAOD->GetNumberOfTracks());
 774
 775
 776
 777     Printf("There are %d tracks in this event", fAOD->GetNumberOfTracks());
 778     // fNtracks Cut
 779     if(fAOD->GetNumberOfTracks() > kNbinsM) {cout<<"More tracks than limit"<<endl; return;}
 780     bField = fAOD->GetMagneticField();
 781
 782     // Track loop
 783     for (Int_t i = 0; i < fAOD->GetNumberOfTracks(); i++) {
 784       AliAODTrack* aodtrack = fAOD->GetTrack(i);
 785       if (!aodtrack) continue;
 786
 787       status=aodtrack->GetStatus();
 788
 789
 790       if( (status&AliESDtrack::kTPCrefit)==0) continue;// Require tpcrefit
 791       if( aodtrack->GetTPCNcls() < 70) continue;// TPC Ncluster cut
 792       if(aodtrack->Pt() < 0.15) continue;
 793       AliAODVertex *VtxType=aodtrack->GetProdVertex();
 794       if((VtxType->GetType())==AliAODVertex::kKink) continue;// Reject Kinks
 795
 796       Bool_t goodMomentum = aodtrack->GetPxPyPz( fTempStruct[myTracks].fP);
 797       if(!goodMomentum) continue;
 798       aodtrack->GetXYZ( fTempStruct[myTracks].fX);
 799
 800
 801       aodtrack->GetCovarianceXYZPxPyPz( fTempStruct[myTracks].fCov);
 802
 803       dca2[0] = sqrt( pow(fTempStruct[myTracks].fX[0] - primaryVtx[0],2) + pow(fTempStruct[myTracks].fX[1] - primaryVtx[1],2));
 804       dca2[1] = sqrt( pow(fTempStruct[myTracks].fX[2] - primaryVtx[2],2));
 805       dca3d = sqrt( pow(dca2[0],2) + pow(dca2[1],2));
 806
 807       ((TH1F*)fOutputList->FindObject("fDCADist"))->Fill(fAOD->GetNumberOfTracks(), dca3d);
 808       ((TH3F*)fOutputList->FindObject("fPhiPtDist"))->Fill(aodtrack->Charge(), aodtrack->Phi(), aodtrack->Pt());
 809       ((TH3F*)fOutputList->FindObject("fPtEtaDist"))->Fill(aodtrack->Charge(), aodtrack->Pt(), aodtrack->Eta());
 810
 811
 812
 813
 814       fTempStruct[myTracks].fStatus = status;
 815       fTempStruct[myTracks].fFilterMap = aodtrack->GetFilterMap();
 816       fTempStruct[myTracks].fID = aodtrack->GetID();
 817       fTempStruct[myTracks].fLabel = aodtrack->GetLabel();
 818       fTempStruct[myTracks].fPhi = atan2(fTempStruct[myTracks].fP[1], fTempStruct[myTracks].fP[0]);
 819       if(fTempStruct[myTracks].fPhi < 0) fTempStruct[myTracks].fPhi += 2*PI;
 820       fTempStruct[myTracks].fPt = sqrt(pow(fTempStruct[myTracks].fP[0],2) + pow(fTempStruct[myTracks].fP[1],2));
 821       fTempStruct[myTracks].fMom = sqrt( pow(fTempStruct[myTracks].fPt,2) + pow(fTempStruct[myTracks].fP[2],2) );
 822       fTempStruct[myTracks].fEta = aodtrack->Eta();
 823       fTempStruct[myTracks].fCharge = aodtrack->Charge();
 824       fTempStruct[myTracks].fDCAXY = dca2[0];
 825       fTempStruct[myTracks].fDCAZ = dca2[1];
 826       fTempStruct[myTracks].fDCA = dca3d;
 827       fTempStruct[myTracks].fNSigmaPi = fabs(fPIDResponse->NumberOfSigmasTPC(aodtrack,AliPID::kPion));
 828       fTempStruct[myTracks].fNSigmaK = fabs(fPIDResponse->NumberOfSigmasTPC(aodtrack,AliPID::kKaon));
 829       fTempStruct[myTracks].fNSigmaPr = fabs(fPIDResponse->NumberOfSigmasTPC(aodtrack,AliPID::kProton));
 830
 831
 832       if(aodtrack->Charge() > 0) positiveTracks++;
 833       else negativeTracks++;
 834
 835
 836       myTracks++;
 837     }
 838   }else {// ESDs
 839
 840     ((TH1F*)fOutputList->FindObject("fMultDist1"))->Fill(fESD->GetNumberOfTracks());
 841     PrimaryVertexESD = fESD->GetPrimaryVertex();
 842     if(!PrimaryVertexESD) return;
 843
 844     primaryVtx[0]=PrimaryVertexESD->GetX(); primaryVtx[1]=PrimaryVertexESD->GetY(); primaryVtx[2]=PrimaryVertexESD->GetZ();
 845     ((TH3F*)fOutputList->FindObject("fVertexDist1"))->Fill(primaryVtx[0], primaryVtx[1], primaryVtx[2]);
 846
 847     if(fMCcase){
 848       /////////////////////////////////////////////////
 849       // Lam mc input
 850       /////////////////////////////////////////////////
 851       for (Int_t it = 0; it < mcstack->GetNprimary(); it++) {
 852         TParticle *mcInputTrack = (TParticle*)mcstack->Particle(it);
 853         if (!mcInputTrack) {
 854           Error("UserExec", "Could not receive track %d", it);
 855           continue;
 856         }
 857
 858
 859         // Xi
 860         if(mcInputTrack->GetPdgCode() == +kXiCode) ((TH3F*)fOutputList->FindObject("fMCinputTotalXi1"))->Fill(mcInputTrack->Pt(), mcInputTrack->Y(), mcInputTrack->GetCalcMass());
 861         if(mcInputTrack->GetPdgCode() == -kXiCode) ((TH3F*)fOutputList->FindObject("fMCinputTotalXibar1"))->Fill(mcInputTrack->Pt(), mcInputTrack->Y(), mcInputTrack->GetCalcMass());
 862
 863         // XiStar
 864         if(mcInputTrack->GetPdgCode() == +kXiStarCode) ((TH3F*)fOutputList->FindObject("fMCinputTotalXiStar1"))->Fill(mcInputTrack->Pt(), mcInputTrack->Y(), mcInputTrack->GetCalcMass());
 865         if(mcInputTrack->GetPdgCode() == -kXiStarCode) ((TH3F*)fOutputList->FindObject("fMCinputTotalXiStarbar1"))->Fill(mcInputTrack->Pt(), mcInputTrack->Y(), mcInputTrack->GetCalcMass());
 866
 867       }
 868
 869
 870     }
 871
 872
 873
 874     if(fabs(primaryVtx[2]) > 10.) return; // Z-Vertex Cut
 875     ((TH1F*)fOutputList->FindObject("fMultDist2"))->Fill(fESD->GetNumberOfTracks());
 876
 877
 878     if(fESD->IsPileupFromSPD()) return; // Reject Pile-up events
 879
 880     ((TH1F*)fOutputList->FindObject("fMultDist3"))->Fill(fESD->GetNumberOfTracks());
 881     ((TH3F*)fOutputList->FindObject("fVertexDist3"))->Fill(primaryVtx[0], primaryVtx[1], primaryVtx[2]);
 882
 883     if(PrimaryVertexESD->GetNContributors() >= 1) ((TH1F*)fOutputList->FindObject("fMultDist4"))->Fill(fESD->GetNumberOfTracks());
 884
 885     Printf("There are %d tracks in this event", fESD->GetNumberOfTracks());
 886     // fNtracks Cut
 887     if(fESD->GetNumberOfTracks() > kNbinsM) {cout<<"More tracks than limit"<<endl; return;}
 888     bField = fESD->GetMagneticField();
 889
 890
 891     // Track loop
 892     for (Int_t i = 0; i < fESD->GetNumberOfTracks(); i++) {
 893       AliESDtrack* esdtrack = fESD->GetTrack(i);
 894       if (!esdtrack) continue;
 895
 896       status=esdtrack->GetStatus();
 897
 898       if(!fTrackCut->AcceptTrack(esdtrack)) continue;
 899
 900       Bool_t goodMomentum = esdtrack->GetPxPyPz( fTempStruct[myTracks].fP);
 901       if(!goodMomentum) continue;
 902       esdtrack->GetXYZ( fTempStruct[myTracks].fX);
 903
 904
 905       esdtrack->GetCovarianceXYZPxPyPz( fTempStruct[myTracks].fCov);
 906       //esdtrack->GetImpactParameters(dca2, cov);
 907       dca2[0] = sqrt( pow(fTempStruct[myTracks].fX[0] - primaryVtx[0],2) + pow(fTempStruct[myTracks].fX[1] - primaryVtx[1],2));
 908       dca2[1] = sqrt( pow(fTempStruct[myTracks].fX[2] - primaryVtx[2],2));
 909       dca3d = sqrt( pow(dca2[0],2) + pow(dca2[1],2));
 910
 911       ((TH1F*)fOutputList->FindObject("fDCADist"))->Fill(fESD->GetNumberOfTracks(), dca3d);
 912       ((TH3F*)fOutputList->FindObject("fPhiPtDist"))->Fill(esdtrack->Charge(), esdtrack->Phi(), esdtrack->Pt());
 913       ((TH3F*)fOutputList->FindObject("fPtEtaDist"))->Fill(esdtrack->Charge(), esdtrack->Pt(), esdtrack->Eta());
 914
 915
 916
 917       fTempStruct[myTracks].fStatus = status;
 918       fTempStruct[myTracks].fID = esdtrack->GetID();
 919       fTempStruct[myTracks].fLabel = esdtrack->GetLabel();
 920       fTempStruct[myTracks].fPhi = atan2(fTempStruct[myTracks].fP[1], fTempStruct[myTracks].fP[0]);
 921       if(fTempStruct[myTracks].fPhi < 0) fTempStruct[myTracks].fPhi += 2*PI;
 922       fTempStruct[myTracks].fPt = sqrt(pow(fTempStruct[myTracks].fP[0],2) + pow(fTempStruct[myTracks].fP[1],2));
 923       fTempStruct[myTracks].fMom = sqrt( pow(fTempStruct[myTracks].fPt,2) + pow(fTempStruct[myTracks].fP[2],2) );
 924       fTempStruct[myTracks].fEta = esdtrack->Eta();
 925       fTempStruct[myTracks].fCharge = esdtrack->Charge();
 926       fTempStruct[myTracks].fDCAXY = dca2[0];
 927       fTempStruct[myTracks].fDCAZ = dca2[1];
 928       fTempStruct[myTracks].fDCA = dca3d;
 929       fTempStruct[myTracks].fNSigmaPi = fabs(fPIDResponse->NumberOfSigmasTPC(esdtrack,AliPID::kPion));
 930       fTempStruct[myTracks].fNSigmaK = fabs(fPIDResponse->NumberOfSigmasTPC(esdtrack,AliPID::kKaon));
 931       fTempStruct[myTracks].fNSigmaPr = fabs(fPIDResponse->NumberOfSigmasTPC(esdtrack,AliPID::kProton));
 932       fTempStruct[myTracks].fNclusTPC = esdtrack->GetTPCNcls();
 933
 934
 935       if(esdtrack->Charge() > 0) positiveTracks++;
 936       else negativeTracks++;
 937
 938       myTracks++;
 939     }
 940
 941   }// end of ESD case
 942
 943
 944
 945   if(myTracks >= 1) {
 946     ((TH1F*)fOutputList->FindObject("fMultDist5"))->Fill(myTracks);
 947     ((TH3F*)fOutputList->FindObject("fMultDist3d"))->Fill(positiveTracks+negativeTracks, positiveTracks, negativeTracks);
 948   }
 949
 950
 951   cout<<"There are "<<myTracks<<"  myTracks"<<endl;
 952
 953   // set Z Vertex bin
 954   for(Int_t i=0; i<fZvertexBins; i++){
 955     if( (primaryVtx[2] > zStart+i*zStep) && (primaryVtx[2] < zStart+(i+1)*zStep) ){
 956       zBin=i;
 957       break;
 958     }
 959   }
 960
 961   // set Multiplicity bin
 962   for(Int_t i=0; i<fMultBins; i++){
 963     if( ( myTracks > fMultLimits[i]) && ( myTracks <= fMultLimits[i+1]) ) { mBin=i; break;}
 964   }
 965
 966
 967
 968   ////////////////////////////////////
 969   // Add event to buffer if > 0 tracks
 970   if(myTracks > 0){
 971     fEC[zBin][mBin]->FIFOShift();
 972     (fEvt) = fEC[zBin][mBin]->fEvtStr;
 973     (fEvt)->fNTracks = myTracks;
 974     for(Int_t i=0; i<myTracks; i++) (fEvt)->fTracks[i] = fTempStruct[i];
 975   }
 976
 977
 978
 979
 980   if(fMCcase && fAODcase){// get Input MC information for AOD case
 981
 982     /////////////////////////////////////////////////
 983     // Xi mc input
 984     /////////////////////////////////////////////////
 985     for (Int_t it = 0; it < mcArray->GetEntriesFast(); it++) {
 986       AliAODMCParticle *mcInputTrackXi = (AliAODMCParticle*)mcArray->At(it);
 987
 988       if (!mcInputTrackXi) {
 989         Error("UserExec", "Could not receive track %d", it);
 990         continue;
 991       }
 992
 993       if(abs(mcInputTrackXi->GetPdgCode())!=kXiCode) continue;
 994       if(!mcInputTrackXi->IsPhysicalPrimary()) continue;
 995
 996
 997       if(mcInputTrackXi->GetPdgCode() == +kXiCode) ((TH3F*)fOutputList->FindObject("fMCinputTotalXi3"))->Fill(mcInputTrackXi->Pt(), mcInputTrackXi->Y(), mcInputTrackXi->GetCalcMass());
 998       else ((TH3F*)fOutputList->FindObject("fMCinputTotalXibar3"))->Fill(mcInputTrackXi->Pt(), mcInputTrackXi->Y(), mcInputTrackXi->GetCalcMass());
 999
1000
1001
1002       AliAODMCParticle *mcInputTrackXiD1 = (AliAODMCParticle*)mcArray->At(abs(mcInputTrackXi->GetDaughter(0)));
1003       AliAODMCParticle *mcInputTrackXiD2 = (AliAODMCParticle*)mcArray->At(abs(mcInputTrackXi->GetDaughter(1)));
1004
1005       if(abs(mcInputTrackXiD1->GetPdgCode())!=kLambdaCode && abs(mcInputTrackXiD2->GetPdgCode())!=kLambdaCode) continue;
1006       if(abs(mcInputTrackXiD1->GetPdgCode())!=kPionCode && abs(mcInputTrackXiD2->GetPdgCode())!=kPionCode) continue;
1007
1008
1009       // At this point we have the right Xi decay channel
1010
1011       AliAODMCParticle *mcInputTrackLamD1;
1012       AliAODMCParticle *mcInputTrackLamD2;
1013
1014       if(abs(mcInputTrackXiD1->GetPdgCode())==kLambdaCode) {
1015         mcInputTrackLamD1 = (AliAODMCParticle*)mcArray->At(abs(mcInputTrackXiD1->GetDaughter(0)));
1016         mcInputTrackLamD2 = (AliAODMCParticle*)mcArray->At(abs(mcInputTrackXiD1->GetDaughter(1)));
1017       }
1018       else{
1019         mcInputTrackLamD1 = (AliAODMCParticle*)mcArray->At(abs(mcInputTrackXiD2->GetDaughter(0)));
1020         mcInputTrackLamD2 = (AliAODMCParticle*)mcArray->At(abs(mcInputTrackXiD2->GetDaughter(1)));
1021       }
1022
1023
1024       if(abs(mcInputTrackLamD1->GetPdgCode())!=kProtonCode && abs(mcInputTrackLamD2->GetPdgCode())!=kProtonCode) continue;
1025       if(abs(mcInputTrackLamD1->GetPdgCode())!=kPionCode && abs(mcInputTrackLamD2->GetPdgCode())!=kPionCode) continue;
1026
1027       // At this point we have the right Lambda decay channel
1028
1029       if(mcInputTrackXi->GetPdgCode() == +kXiCode) ((TH3F*)fOutputList->FindObject("fMCinputXi"))->Fill(mcInputTrackXi->Pt(), mcInputTrackXi->Y(), mcInputTrackXi->GetCalcMass());
1030       else ((TH3F*)fOutputList->FindObject("fMCinputXibar"))->Fill(mcInputTrackXi->Pt(), mcInputTrackXi->Y(), mcInputTrackXi->GetCalcMass());
1031
1032     }
1033
1034
1035
1036     /////////////////////////////////////////////////
1037     // XiStar mc input
1038     /////////////////////////////////////////////////
1039     for (Int_t it = 0; it < mcArray->GetEntriesFast(); it++) {
1040       AliAODMCParticle *mcInputTrackXiStar = (AliAODMCParticle*)mcArray->At(it);
1041       if (!mcInputTrackXiStar) {
1042         Error("UserExec", "Could not receive track %d", it);
1043         continue;
1044       }
1045
1046       if(abs(mcInputTrackXiStar->GetPdgCode())!=kXiStarCode) continue;
1047       if(!mcInputTrackXiStar->IsPhysicalPrimary()) continue;
1048
1049       if(mcInputTrackXiStar->GetPdgCode() == +kXiStarCode) ((TH3F*)fOutputList->FindObject("fMCinputTotalXiStar3"))->Fill(mcInputTrackXiStar->Pt(), mcInputTrackXiStar->Y(), mcInputTrackXiStar->GetCalcMass());
1050       else ((TH3F*)fOutputList->FindObject("fMCinputTotalXiStarbar3"))->Fill(mcInputTrackXiStar->Pt(), mcInputTrackXiStar->Y(), mcInputTrackXiStar->GetCalcMass());
1051
1052
1053       AliAODMCParticle *mcInputTrackXiStarD1 = (AliAODMCParticle*)mcArray->At(abs(mcInputTrackXiStar->GetDaughter(0)));
1054       AliAODMCParticle *mcInputTrackXiStarD2 = (AliAODMCParticle*)mcArray->At(abs(mcInputTrackXiStar->GetDaughter(1)));
1055
1056       if(abs(mcInputTrackXiStarD1->GetPdgCode())!=kXiCode && abs(mcInputTrackXiStarD2->GetPdgCode())!=kXiCode) continue;
1057       if(abs(mcInputTrackXiStarD1->GetPdgCode())!=kPionCode && abs(mcInputTrackXiStarD2->GetPdgCode())!=kPionCode) continue;
1058
1059
1060       // At this point we have the right Xi(1530) decay channel
1061
1062       AliAODMCParticle *mcInputTrackXiD1;
1063       AliAODMCParticle *mcInputTrackXiD2;
1064       if(abs(mcInputTrackXiStarD1->GetPdgCode())==kXiCode) {
1065         mcInputTrackXiD1 = (AliAODMCParticle*)mcArray->At(abs(mcInputTrackXiStarD1->GetDaughter(0)));
1066         mcInputTrackXiD2 = (AliAODMCParticle*)mcArray->At(abs(mcInputTrackXiStarD1->GetDaughter(1)));
1067       }
1068       else{
1069         mcInputTrackXiD1 = (AliAODMCParticle*)mcArray->At(abs(mcInputTrackXiStarD2->GetDaughter(0)));
1070         mcInputTrackXiD2 = (AliAODMCParticle*)mcArray->At(abs(mcInputTrackXiStarD2->GetDaughter(1)));
1071       }
1072
1073       if(abs(mcInputTrackXiD1->GetPdgCode())!=kLambdaCode && abs(mcInputTrackXiD2->GetPdgCode())!=kLambdaCode) continue;
1074       if(abs(mcInputTrackXiD1->GetPdgCode())!=kPionCode && abs(mcInputTrackXiD2->GetPdgCode())!=kPionCode) continue;
1075
1076
1077       // At this point we have the right Xi decay channel
1078
1079       AliAODMCParticle *mcInputTrackLamD1;
1080       AliAODMCParticle *mcInputTrackLamD2;
1081
1082       if(abs(mcInputTrackXiD1->GetPdgCode())==kLambdaCode) {
1083         mcInputTrackLamD1 = (AliAODMCParticle*)mcArray->At(abs(mcInputTrackXiD1->GetDaughter(0)));
1084         mcInputTrackLamD2 = (AliAODMCParticle*)mcArray->At(abs(mcInputTrackXiD1->GetDaughter(1)));
1085       }
1086       else{
1087         mcInputTrackLamD1 = (AliAODMCParticle*)mcArray->At(abs(mcInputTrackXiD2->GetDaughter(0)));
1088         mcInputTrackLamD2 = (AliAODMCParticle*)mcArray->At(abs(mcInputTrackXiD2->GetDaughter(1)));
1089       }
1090
1091       if(abs(mcInputTrackLamD1->GetPdgCode())!=kProtonCode && abs(mcInputTrackLamD2->GetPdgCode())!=kProtonCode) continue;
1092       if(abs(mcInputTrackLamD1->GetPdgCode())!=kPionCode && abs(mcInputTrackLamD2->GetPdgCode())!=kPionCode) continue;
1093
1094       // At this point we the right Lambda decay channel
1095
1096       if(mcInputTrackXiStar->GetPdgCode() == +kXiStarCode) ((TH3F*)fOutputList->FindObject("fMCinputXiStar"))->Fill(mcInputTrackXiStar->Pt(), mcInputTrackXiStar->Y(), mcInputTrackXiStar->GetCalcMass());
1097       else ((TH3F*)fOutputList->FindObject("fMCinputXiStarbar"))->Fill(mcInputTrackXiStar->Pt(), mcInputTrackXiStar->Y(), mcInputTrackXiStar->GetCalcMass());
1098
1099       if(abs(mcInputTrackXiStarD1->GetPdgCode())==kXiCode) {
1100         ((TH2F*)fOutputList->FindObject("fMCinputXiStarxiy"))->Fill(mcInputTrackXiStar->Y(), mcInputTrackXiStarD1->Y());
1101         ((TH2F*)fOutputList->FindObject("fMCinputXiStarpiony"))->Fill(mcInputTrackXiStar->Y(), mcInputTrackXiStarD2->Y());
1102       }else{
1103         ((TH2F*)fOutputList->FindObject("fMCinputXiStarxiy"))->Fill(mcInputTrackXiStar->Y(), mcInputTrackXiStarD2->Y());
1104         ((TH2F*)fOutputList->FindObject("fMCinputXiStarpiony"))->Fill(mcInputTrackXiStar->Y(), mcInputTrackXiStarD1->Y());
1105       }
1106       if(abs(mcInputTrackXiD1->GetPdgCode())==kLambdaCode){
1107         ((TH2F*)fOutputList->FindObject("fMCinputXilambday"))->Fill(mcInputTrackXiStar->Y(), mcInputTrackXiD1->Y());
1108         ((TH2F*)fOutputList->FindObject("fMCinputXipiony"))->Fill(mcInputTrackXiStar->Y(), mcInputTrackXiD2->Y());
1109       }else{
1110         ((TH2F*)fOutputList->FindObject("fMCinputXilambday"))->Fill(mcInputTrackXiStar->Y(), mcInputTrackXiD2->Y());
1111         ((TH2F*)fOutputList->FindObject("fMCinputXipiony"))->Fill(mcInputTrackXiStar->Y(), mcInputTrackXiD1->Y());
1112       }
1113       if(abs(mcInputTrackLamD1->GetPdgCode())==kProtonCode){
1114         ((TH2F*)fOutputList->FindObject("fMCinputLamprotony"))->Fill(mcInputTrackXiStar->Y(), mcInputTrackLamD1->Y());
1115         ((TH2F*)fOutputList->FindObject("fMCinputLampiony"))->Fill(mcInputTrackXiStar->Y(), mcInputTrackLamD2->Y());
1116       }else {
1117         ((TH2F*)fOutputList->FindObject("fMCinputLamprotony"))->Fill(mcInputTrackXiStar->Y(), mcInputTrackLamD2->Y());
1118         ((TH2F*)fOutputList->FindObject("fMCinputLampiony"))->Fill(mcInputTrackXiStar->Y(), mcInputTrackLamD1->Y());
1119       }
1120
1121
1122     }
1123   }
1124
1125
1126
1127   if(fMCcase && !fAODcase){// get Input MC information for ESD case
1128
1129     /////////////////////////////////////////////////
1130     // Xi mc input
1131     /////////////////////////////////////////////////
1132     for (Int_t it = 0; it < mcstack->GetNprimary(); it++) {
1133       TParticle *mcInputTrackXi = (TParticle*)mcstack->Particle(it);
1134       if (!mcInputTrackXi) {
1135         Error("UserExec", "Could not receive track %d", it);
1136         continue;
1137       }
1138
1139       //if(!mcstack->IsPhysicalPrimary(it)) continue;
1140       if(abs(mcInputTrackXi->GetPdgCode())!=kXiCode) continue;
1141
1142
1143       if(mcInputTrackXi->GetPdgCode() == +kXiCode) ((TH3F*)fOutputList->FindObject("fMCinputTotalXi3"))->Fill(mcInputTrackXi->Pt(), mcInputTrackXi->Y(), mcInputTrackXi->GetCalcMass());
1144       else ((TH3F*)fOutputList->FindObject("fMCinputTotalXibar3"))->Fill(mcInputTrackXi->Pt(), mcInputTrackXi->Y(), mcInputTrackXi->GetCalcMass());
1145
1146     }
1147
1148
1149     /////////////////////////////////////////////////
1150     // XiStar mc input
1151     /////////////////////////////////////////////////
1152     for (Int_t it = 0; it < mcstack->GetNprimary(); it++) {
1153       TParticle *mcInputTrackXiStar = (TParticle*)mcstack->Particle(it);
1154       if (!mcInputTrackXiStar) {
1155         Error("UserExec", "Could not receive track %d", it);
1156         continue;
1157       }
1158
1159       //if(!mcstack->IsPhysicalPrimary(it)) continue;
1160       if(abs(mcInputTrackXiStar->GetPdgCode())!=kXiStarCode) continue;
1161
1162       if(mcInputTrackXiStar->GetPdgCode() == +kXiStarCode) ((TH3F*)fOutputList->FindObject("fMCinputTotalXiStar3"))->Fill(mcInputTrackXiStar->Pt(), mcInputTrackXiStar->Y(), mcInputTrackXiStar->GetCalcMass());
1163       else ((TH3F*)fOutputList->FindObject("fMCinputTotalXiStarbar3"))->Fill(mcInputTrackXiStar->Pt(), mcInputTrackXiStar->Y(), mcInputTrackXiStar->GetCalcMass());
1164
1165     }
1166   }
1167
1168
1169
1170   if(fAODcase) {cout<<"AOD XiVertexer not currently supported! Exiting event"<<endl; return;}
1171
1172   ////////////////////////////////////////////////
1173   // Reconstruction
1174
1175   for(Int_t i=0; i<fESD->GetNumberOfCascades(); i++){
1176
1177     AliESDcascade *Xicandidate = fESD->GetCascade(i);
1178
1179     if(TMath::Abs( Xicandidate->GetPindex()) == TMath::Abs( Xicandidate->GetNindex())) continue;
1180     if(TMath::Abs( Xicandidate->GetPindex()) == TMath::Abs( Xicandidate->GetBindex())) continue;
1181     if(TMath::Abs( Xicandidate->GetNindex()) == TMath::Abs( Xicandidate->GetBindex())) continue;
1182
1183     AliESDtrack *pTrackXi       = fESD->GetTrack(TMath::Abs( Xicandidate->GetPindex()));
1184     AliESDtrack *nTrackXi       = fESD->GetTrack(TMath::Abs( Xicandidate->GetNindex()));
1185     AliESDtrack *bTrackXi       = fESD->GetTrack(TMath::Abs( Xicandidate->GetBindex()));
1186
1187     // Standard track QA cuts
1188     if(!fTrackCut->AcceptTrack(pTrackXi)) continue;
1189     if(!fTrackCut->AcceptTrack(nTrackXi)) continue;
1190     if(!fTrackCut->AcceptTrack(bTrackXi)) continue;
1191
1192     //////////////////////
1193     // DecayParameters Key (number represents array index)
1194     // NclustersTPC: 0=proton, 1=pion first, 2=pion second, 3=pion third
1195     // DCAVtx: 4=proton, 5=pion first, 6=pion second, 7=lambda, 8=pion third
1196     // 9 = DCA proton-pion
1197     // 10 = DCA Lambda-pion
1198     // 11 = Rxy Lambda
1199     // 12 = Rxy Xi
1200     // 13 = Cos PA Lambda
1201     // 14 = Cos PA Xi
1202
1203
1204     fDecayParameters[2] = bTrackXi->GetTPCNcls();
1205
1206
1207     if(Xicandidate->Charge() == -1){
1208       fDecayParameters[0] = pTrackXi->GetTPCNcls();
1209       fDecayParameters[1] = nTrackXi->GetTPCNcls();
1210       fDecayParameters[4] = fabs(pTrackXi->GetD(primaryVtx[0],primaryVtx[1],bField));// DCA Vtx proton
1211       fDecayParameters[5] = fabs(nTrackXi->GetD(primaryVtx[0],primaryVtx[1],bField));// DCA Vtx pion first
1212     }else{
1213       fDecayParameters[0] = nTrackXi->GetTPCNcls();
1214       fDecayParameters[1] = pTrackXi->GetTPCNcls();
1215       fDecayParameters[4] = fabs(nTrackXi->GetD(primaryVtx[0],primaryVtx[1],bField));// DCA Vtx proton
1216       fDecayParameters[5] = fabs(pTrackXi->GetD(primaryVtx[0],primaryVtx[1],bField));// DCA Vtx pion first
1217     }
1218
1219
1220     fDecayParameters[6] = fabs(bTrackXi->GetD(primaryVtx[0],primaryVtx[1],bField));// DCA Vtx pion second
1221     fDecayParameters[7] = fabs(Xicandidate->GetD(primaryVtx[0],primaryVtx[1],primaryVtx[2]));// DCA Vtx Lambda
1222     fDecayParameters[9] = fabs(Xicandidate->GetDcaV0Daughters());// DCA proton-pion
1223     fDecayParameters[10] = fabs(Xicandidate->GetDcaXiDaughters());// DCA Lambda-pion
1224
1225
1226
1227     Double_t tempX[3]={0};
1228     Xicandidate->GetXYZ(tempX[0], tempX[1], tempX[2]);
1229     fDecayParameters[11] = sqrt( pow(tempX[0],2) + pow(tempX[1],2));// Rxy Lambda
1230     if(sqrt( pow(tempX[0],2) + pow(tempX[1],2) ) > fMaxDecayLength) continue;
1231
1232
1233     fDecayParameters[13] = Xicandidate->GetV0CosineOfPointingAngle(primaryVtx[0],primaryVtx[1],primaryVtx[2]);// Cos PA Lambda
1234     fDecayParameters[14] = Xicandidate->GetCascadeCosineOfPointingAngle(primaryVtx[0],primaryVtx[1],primaryVtx[2]);// Cos PA Xi
1235
1236     xiP[0] = Xicandidate->Px();
1237     xiP[1] = Xicandidate->Py();
1238     xiP[2] = Xicandidate->Pz();
1239     xiVtx[0] = Xicandidate->Xv();
1240     xiVtx[1] = Xicandidate->Yv();
1241     xiVtx[2] = Xicandidate->Zv();
1242     xiPt = Xicandidate->Pt();
1243     xiY = Xicandidate->RapXi();
1244     xiMass = Xicandidate->M();
1245     xiCharge = Xicandidate->Charge();
1246
1247     decayLengthXY = sqrt( pow(xiVtx[0]-primaryVtx[0],2) + pow(xiVtx[1]-primaryVtx[1],2) );
1248     fDecayParameters[12] = decayLengthXY;// Rxy Xi
1249     if(decayLengthXY > fMaxDecayLength) continue;// 2d version
1250
1251     Bool_t StandardXi=kTRUE;
1252     if(fDecayParameters[0] < fCutValues[0][0]) StandardXi=kFALSE;// Nclus proton
1253     if(fDecayParameters[1] < fCutValues[0][1]) StandardXi=kFALSE;// Nclus pion first
1254     if(fDecayParameters[2] < fCutValues[0][2]) StandardXi=kFALSE;// Nclus pion second
1255     //
1256     if(fDecayParameters[4] < fCutValues[0][4]) StandardXi=kFALSE;// DCAVtx proton
1257     if(fDecayParameters[5] < fCutValues[0][5]) StandardXi=kFALSE;// DCAVtx pion first
1258     if(fDecayParameters[6] < fCutValues[0][6]) StandardXi=kFALSE;// DCAVtx pion second
1259     if(fDecayParameters[7] < fCutValues[0][7]) StandardXi=kFALSE;// DCAVtx Lambda
1260     //
1261     if(fDecayParameters[9] > fCutValues[0][9]) StandardXi=kFALSE;// DCAV proton-pion
1262     if(fDecayParameters[10] > fCutValues[0][10]) StandardXi=kFALSE;// DCAV Lambda-pion
1263     //
1264     if(fDecayParameters[11] < fCutValues[0][11]) StandardXi=kFALSE;// Rxy Lambda
1265     if(fDecayParameters[12] < fCutValues[0][12]) StandardXi=kFALSE;// Rxy Xi
1266     //
1267     if(fDecayParameters[13] < fCutValues[0][13]) StandardXi=kFALSE;// Cos PA Lambda
1268     if(fDecayParameters[14] < fCutValues[0][14]) StandardXi=kFALSE;// Cos PA Xi
1269
1270     if(StandardXi){
1271       if(xiCharge == -1) CutVar[0].fXi->Fill(xiPt, xiY, xiMass);
1272       else CutVar[0].fXibar->Fill(xiPt, xiY, xiMass);
1273     }
1274
1275     // MC associaton
1276     mcXiFilled = kFALSE;
1277     if(fMCcase && !fAODcase){
1278
1279       MCXiD2esd = (TParticle*)mcstack->Particle(abs(bTrackXi->GetLabel()));
1280
1281       if(abs(MCXiD2esd->GetPdgCode())==kPionCode){
1282
1283         MCLamD1esd = (TParticle*)mcstack->Particle(abs(pTrackXi->GetLabel()));
1284         MCLamD2esd = (TParticle*)mcstack->Particle(abs(nTrackXi->GetLabel()));
1285
1286         if(MCLamD1esd->GetMother(0) == MCLamD2esd->GetMother(0)){
1287           if(abs(MCLamD1esd->GetPdgCode())==kProtonCode || abs(MCLamD2esd->GetPdgCode())==kProtonCode) {
1288             if(abs(MCLamD1esd->GetPdgCode())==kPionCode || abs(MCLamD2esd->GetPdgCode())==kPionCode) {
1289
1290               MCLamesd = (TParticle*)mcstack->Particle(abs(MCLamD1esd->GetMother(0)));
1291               if(abs(MCLamesd->GetPdgCode())==kLambdaCode) {
1292
1293                 if(MCLamesd->GetMother(0) == MCXiD2esd->GetMother(0)){
1294                   MCXiesd = (TParticle*)mcstack->Particle(abs(MCLamesd->GetMother(0)));
1295                   if(abs(MCXiesd->GetPdgCode())==kXiCode) {
1296                     mcXiFilled = kTRUE;
1297
1298                     if(StandardXi){
1299                       if(Xicandidate->Charge() == -1) {
1300                         CutVar[0].fMCrecXi->Fill(xiPt, xiY, xiMass);
1301                       }else {
1302                         CutVar[0].fMCrecXibar->Fill(xiPt, xiY, xiMass);
1303                       }
1304                     }
1305
1306                   }
1307                 }
1308               }
1309             }
1310           }
1311         }
1312       }
1313     }// MC association
1314
1315
1316     if(fabs(xiMass-fTrueMassXi) > fMassWindow) continue;
1317
1318
1319
1320     fXiTrack->Set(xiVtx, xiP, fCovMatrix, Short_t(xiCharge));
1321
1322
1323     //////////////////////////////////////////////////////////
1324     // Reconstruct Xi(1530)
1325     for(Int_t EN=0; EN<fEventsToMix+1; EN++){// Event buffer loop
1326
1327       for(Int_t l=0; l<(fEvt+EN)->fNTracks; l++){// Present(EN=0) and Past(EN from 1 to fEventsToMix) event track loop
1328
1329         if(EN==0) {
1330           if((fEvt+EN)->fTracks[l].fID == pTrackXi->GetID()) continue;
1331           if((fEvt+EN)->fTracks[l].fID == nTrackXi->GetID()) continue;
1332           if((fEvt+EN)->fTracks[l].fID == bTrackXi->GetID()) continue;
1333         }
1334
1335         fXiTrack->Set(xiVtx, xiP, fCovMatrix, Short_t(xiCharge));
1336
1337         if(!fESDTrack4) continue;
1338         fESDTrack4->Set((fEvt+EN)->fTracks[l].fX, (fEvt+EN)->fTracks[l].fP, (fEvt+EN)->fTracks[l].fCov, (fEvt+EN)->fTracks[l].fCharge);
1339         if(fAODcase){
1340           if((Bool_t)(((1<<5) & (fEvt+EN)->fTracks[l].fFilterMap) == 0)) continue;// AOD filterbit cut, "Standard cuts with tight dca"
1341         }else{
1342           fDecayParameters[8] = (fEvt+EN)->fTracks[l].fDCAXY;// DCA Vtx pion third
1343           if((fEvt+EN)->fTracks[l].fDCAZ > 2) continue;
1344           if( (((fEvt+EN)->fTracks[l].fStatus)&AliESDtrack::kITSrefit)==0) continue;// Require itsrefit
1345           // no Chi^2 cut applied for ESDs.  Info not available in my track structure.
1346         }
1347
1348         if(fabs((fEvt+EN)->fTracks[l].fEta) > 0.8) continue;
1349
1350         fDecayParameters[3] = (fEvt+EN)->fTracks[l].fNclusTPC;
1351
1352         AliVertex *XiStarVtx = new AliVertex((fEvt+EN)->fTracks[l].fX,0,0);
1353         //fESDTrack4->PropagateToDCA(fXiTrack, bField);// Propagate tracks to dca, both tracks are budged
1354         if(!(fXiTrack->PropagateToDCA(XiStarVtx, bField, 3))) continue;// Propagate tracks to dca, version which assumes fESDTrack4 is already primary
1355         /////////////
1356         fXiTrack->GetPxPyPz(pDaughter1);
1357         fXiTrack->GetXYZ(xDaughter1);
1358         fESDTrack4->GetPxPyPz(pDaughter2);
1359         fESDTrack4->GetXYZ(xDaughter2);
1360         //////////////////////////
1361
1362
1363
1364         //xiStarVtx[0] = (xDaughter1[0]+xDaughter2[0])/2.;
1365         //xiStarVtx[1] = (xDaughter1[1]+xDaughter2[1])/2.;
1366         //xiStarVtx[2] = (xDaughter1[2]+xDaughter2[2])/2.;
1367         //decayLength = sqrt(pow(xiStarVtx[0]-primaryVtx[0],2)+pow(xiStarVtx[1]-primaryVtx[1],2)+pow(xiStarVtx[2]-primaryVtx[2],2));
1368
1369         px1=pDaughter1[0];
1370         py1=pDaughter1[1];
1371         pz1=pDaughter1[2];
1372         px2=pDaughter2[0];
1373         py2=pDaughter2[1];
1374         pz2=pDaughter2[2];
1375
1376         p1sq=px1*px1+py1*py1+pz1*pz1;
1377         p2sq=px2*px2+py2*py2+pz2*pz2;
1378         if(p1sq <=0 || p2sq <=0) continue;
1379
1380         e1=sqrt(p1sq+fTrueMassXi*fTrueMassXi);
1381         e2=sqrt(p2sq+fTrueMassPi*fTrueMassPi);
1382         angle=px1*px2+py1*py2+pz1*pz2;
1383         xiStarMass=fTrueMassXi*fTrueMassXi+fTrueMassPi*fTrueMassPi+2.*e1*e2-2.*angle;
1384         if(xiStarMass<0.) xiStarMass=1.e-8;
1385         xiStarMass=sqrt(xiStarMass);
1386
1387
1388         xiStarP[0] = px1+px2;
1389         xiStarP[1] = py1+py2;
1390         xiStarP[2] = pz1+pz2;
1391         xiStarMom = sqrt(pow(xiStarP[0],2)+pow(xiStarP[1],2)+pow(xiStarP[2],2));
1392         if(xiStarMom==0) continue; // So one of the following lines doesnt break
1393         xiStarPt = sqrt(xiStarP[0]*xiStarP[0] + xiStarP[1]*xiStarP[1]);
1394         xiStarY = .5*log( ((e1+e2) + xiStarP[2])/((e1+e2) - xiStarP[2]));
1395         //xiStarE = e1 + e2;
1396
1397
1398         //if( (xiStarP[0]*(xiStarVtx[0]-primaryVtx[0]) + xiStarP[1]*(xiStarVtx[1]-primaryVtx[1]) + xiStarP[2]*(xiStarVtx[2]-primaryVtx[2]))/xiStarMom/decayLength < fXiStarCosTheta) continue;
1399
1400         for(int cv=0; cv<kNCutVariations; cv++){
1401           if(fDecayParameters[0] < fCutValues[cv][0]) continue;// Nclus proton
1402           if(fDecayParameters[1] < fCutValues[cv][1]) continue;// Nclus pion first
1403           if(fDecayParameters[2] < fCutValues[cv][2]) continue;// Nclus pion second
1404           if(fDecayParameters[3] < fCutValues[cv][3]) continue;// Nclus pion third
1405           //
1406           if(fDecayParameters[4] < fCutValues[cv][4]) continue;// DCAVtx proton
1407           if(fDecayParameters[5] < fCutValues[cv][5]) continue;// DCAVtx pion first
1408           if(fDecayParameters[6] < fCutValues[cv][6]) continue;// DCAVtx pion second
1409           if(fDecayParameters[7] < fCutValues[cv][7]) continue;// DCAVtx Lambda
1410           if(cv!=8) {if(fDecayParameters[8] > (0.0182 + 0.035/pow((fEvt+EN)->fTracks[l].fPt,1.01))) continue;}// DCAVtx pion third
1411           else {if(fDecayParameters[8] > fCutValues[cv][8]) continue;}// DCAVtx pion third
1412           //
1413           if(fDecayParameters[9] > fCutValues[cv][9]) continue;// DCAV proton-pion
1414           if(fDecayParameters[10] > fCutValues[cv][10]) continue;// DCAV Lambda-pion
1415           //
1416           if(fDecayParameters[11] < fCutValues[cv][11]) continue;// Rxy Lambda
1417           if(fDecayParameters[12] < fCutValues[cv][12]) continue;// Rxy Xi
1418           //
1419           if(fDecayParameters[13] < fCutValues[cv][13]) continue;// Cos PA Lambda
1420           if(fDecayParameters[14] < fCutValues[cv][14]) continue;// Cos PA Xi
1421
1422
1423           if(EN==0){
1424             if(fXiTrack->Charge() == -1 &&  fESDTrack4->Charge() == -1) CutVar[cv].fXiMinusPiMinus->Fill(xiStarPt, xiStarY, xiStarMass);
1425             else if(fXiTrack->Charge() == -1 &&  fESDTrack4->Charge() == +1) CutVar[cv].fXiMinusPiPlus->Fill(xiStarPt, xiStarY, xiStarMass);
1426             else if(fXiTrack->Charge() == +1 &&  fESDTrack4->Charge() == -1) CutVar[cv].fXiPlusPiMinus->Fill(xiStarPt, xiStarY, xiStarMass);
1427             else CutVar[cv].fXiPlusPiPlus->Fill(xiStarPt, xiStarY, xiStarMass);
1428           }else {
1429             if(fXiTrack->Charge() == -1 &&  fESDTrack4->Charge() == -1) CutVar[cv].fXiMinusPiMinusbkg->Fill(xiStarPt, xiStarY, xiStarMass);
1430             else if(fXiTrack->Charge() == -1 &&  fESDTrack4->Charge() == +1) CutVar[cv].fXiMinusPiPlusbkg->Fill(xiStarPt, xiStarY, xiStarMass);
1431             else if(fXiTrack->Charge() == +1 &&  fESDTrack4->Charge() == -1) CutVar[cv].fXiPlusPiMinusbkg->Fill(xiStarPt, xiStarY, xiStarMass);
1432             else CutVar[cv].fXiPlusPiPlusbkg->Fill(xiStarPt, xiStarY, xiStarMass);
1433           }
1434
1435
1436         /*
1437         // MC associaton AOD
1438         if(fMCcase && mcXiFilled && EN==0 && fAODcase){// AOD MC's
1439
1440           MCXiStarD2 = (AliAODMCParticle*)mcArray->At(abs((fEvt)->fTracks[l].fLabel));
1441
1442           if(abs(MCXiStarD2->GetPdgCode())==kPionCode){
1443             if(MCXi->GetMother() == MCXiStarD2->GetMother()){
1444               MCXiStar = (AliAODMCParticle*)mcArray->At(MCXi->GetMother());
1445               if(abs(MCXiStar->GetPdgCode())==kXiStarCode) {
1446
1447                 if(fXiTrack->Charge() == -1 &&  fESDTrack4->Charge() == +1) fMCrecXiMinusPiPlus->Fill(xiStarPt, xiStarY, xiStarMass);
1448                 if(fXiTrack->Charge() == +1 &&  fESDTrack4->Charge() == -1) fMCrecXiPlusPiMinus->Fill(xiStarPt, xiStarY, xiStarMass);
1449
1450               }
1451             }
1452           }
1453         }
1454         */
1455
1456         // MC associaton ESD
1457           if(fMCcase && mcXiFilled && EN==0 && !fAODcase){// ESD MC's
1458             MCXiStarD2esd = (TParticle*)mcstack->Particle(abs((fEvt)->fTracks[l].fLabel));
1459
1460             if(abs(MCXiStarD2esd->GetPdgCode())==kPionCode){
1461               if(MCXiesd->GetMother(0) == MCXiStarD2esd->GetMother(0)){
1462
1463                 MCXiStaresd = (TParticle*)mcstack->Particle(abs(MCXiesd->GetMother(0)));
1464                 if(abs(MCXiStaresd->GetPdgCode())==kXiStarCode) {
1465
1466                   if(fXiTrack->Charge() == -1 &&  fESDTrack4->Charge() == +1) CutVar[cv].fMCrecXiMinusPiPlus->Fill(xiStarPt, xiStarY, xiStarMass);
1467                   if(fXiTrack->Charge() == +1 &&  fESDTrack4->Charge() == -1) CutVar[cv].fMCrecXiPlusPiMinus->Fill(xiStarPt, xiStarY, xiStarMass);
1468
1469                 }
1470               }
1471             }
1472           }
1473
1474         }// Cut Variation loop
1475       }// 3rd pion loop
1476     }// Event mixing loop
1477
1478   }// Xi loop
1479
1480
1481
1482   // Post output data.
1483   PostData(1, fOutputList);
1484
1485 }
1486 //________________________________________________________________________
1487 void AliXiStar::Terminate(Option_t *)
1488 {
1489   cout<<"Done"<<endl;
1490 }
1491 //________________________________________________________________________
1492 Double_t AliXiStar::LinearPropagateToDCA(AliESDtrack *v, AliESDtrack *t, Double_t b) {// Adapted from AliCascadeVertexer.cxx
1493  //--------------------------------------------------------------------
1494   // This function returns the DCA between the V0 and the track
1495   //--------------------------------------------------------------------
1496
1497   Double_t alpha=t->GetAlpha(), cs1=TMath::Cos(alpha), sn1=TMath::Sin(alpha);
1498   Double_t r[3]; t->GetXYZ(r);
1499   Double_t x1=r[0], y1=r[1], z1=r[2];
1500   Double_t p[3]; t->GetPxPyPz(p);
1501   Double_t px1=p[0], py1=p[1], pz1=p[2];
1502
1503   Double_t x2[3]={0};
1504   Double_t p2[3]={0};
1505   Double_t vx2,vy2,vz2;     // position and momentum of V0
1506   Double_t px2,py2,pz2;
1507
1508   v->GetXYZ(x2);
1509   v->GetPxPyPz(p2);
1510   vx2=x2[0], vy2=x2[1], vz2=x2[2];
1511   px2=p2[0], py2=p2[1], pz2=p2[2];
1512
1513 // calculation dca
1514
1515   Double_t dd= Det(vx2-x1,vy2-y1,vz2-z1,px1,py1,pz1,px2,py2,pz2);
1516   Double_t ax= Det(py1,pz1,py2,pz2);
1517   Double_t ay=-Det(px1,pz1,px2,pz2);
1518   Double_t az= Det(px1,py1,px2,py2);
1519
1520   Double_t dca=TMath::Abs(dd)/TMath::Sqrt(ax*ax + ay*ay + az*az);
1521
1522 //points of the DCA
1523   Double_t t1 = Det(vx2-x1,vy2-y1,vz2-z1,px2,py2,pz2,ax,ay,az)/
1524                 Det(px1,py1,pz1,px2,py2,pz2,ax,ay,az);
1525
1526   x1 += px1*t1; y1 += py1*t1; //z1 += pz1*t1;
1527
1528
1529   //propagate track to the points of DCA
1530
1531   x1=x1*cs1 + y1*sn1;
1532   if (!t->PropagateTo(x1,b)) {
1533     Error("PropagateToDCA","Propagation failed !");
1534     return 1.e+33;
1535   }
1536
1537   return dca;
1538 }
1539
1540
1541 //________________________________________________________________________
1542 Double_t AliXiStar::Det(Double_t a00, Double_t a01, Double_t a10, Double_t a11) const {// Taken from AliCascadeVertexer
1543   //--------------------------------------------------------------------
1544   // This function calculates locally a 2x2 determinant
1545   //--------------------------------------------------------------------
1546   return a00*a11 - a01*a10;
1547 }
1548 //________________________________________________________________________
1549 Double_t AliXiStar::Det(Double_t a00,Double_t a01,Double_t a02,
1550                                  Double_t a10,Double_t a11,Double_t a12,
1551                               Double_t a20,Double_t a21,Double_t a22) const {// Taken from AliCascadeVertexer
1552   //--------------------------------------------------------------------
1553   // This function calculates locally a 3x3 determinant
1554   //--------------------------------------------------------------------
1555   return  a00*Det(a11,a12,a21,a22)-a01*Det(a10,a12,a20,a22)+a02*Det(a10,a11,a20,a21);
1556 }
1557
1558
1559