PWG2/FORWARD/analysis2/AliForwardMultiplicityTask.cxx

   1 //
   2 // Calculate the multiplicity in the forward regions event-by-event
   3 //
   4 // Inputs:
   5 //   - AliESDEvent
   6 //
   7 // Outputs:
   8 //   - AliAODForwardMult
   9 //
  10 // Histograms
  11 //
  12 // Corrections used
  13 //
  14 #include "AliForwardMultiplicityTask.h"
  15 #include "AliTriggerAnalysis.h"
  16 #include "AliPhysicsSelection.h"
  17 #include "AliLog.h"
  18 #include "AliESDEvent.h"
  19 #include "AliAODHandler.h"
  20 #include "AliMultiplicity.h"
  21 #include "AliInputEventHandler.h"
  22 #include "AliForwardCorrectionManager.h"
  23 #include "AliAnalysisManager.h"
  24 #include <TH1.h>
  25 #include <TDirectory.h>
  26 #include <TTree.h>
  27 #include <TROOT.h>
  28
  29
  30 //====================================================================
  31 AliForwardMultiplicityTask::AliForwardMultiplicityTask()
  32   : AliForwardMultiplicityBase(),
  33     fHData(0),
  34     fESDFMD(),
  35     fHistos(),
  36     fAODFMD(),
  37     fEventInspector(),
  38     fEnergyFitter(),
  39     fSharingFilter(),
  40     fDensityCalculator(),
  41     fCorrections(),
  42     fHistCollector(),
  43     fList(0)
  44 {
  45   //
  46   // Constructor
  47   //
  48 }
  49
  50 //____________________________________________________________________
  51 AliForwardMultiplicityTask::AliForwardMultiplicityTask(const char* name)
  52   : AliForwardMultiplicityBase(name),
  53     fHData(0),
  54     fESDFMD(),
  55     fHistos(),
  56     fAODFMD(false),
  57     fEventInspector("event"),
  58     fEnergyFitter("energy"),
  59     fSharingFilter("sharing"),
  60     fDensityCalculator("density"),
  61     fCorrections("corrections"),
  62     fHistCollector("collector"),
  63     fList(0)
  64 {
  65   //
  66   // Constructor
  67   //
  68   // Parameters:
  69   //    name Name of task
  70   //
  71   DefineOutput(1, TList::Class());
  72 }
  73
  74 //____________________________________________________________________
  75 AliForwardMultiplicityTask::AliForwardMultiplicityTask(const AliForwardMultiplicityTask& o)
  76   : AliForwardMultiplicityBase(o),
  77     fHData(o.fHData),
  78     fESDFMD(o.fESDFMD),
  79     fHistos(o.fHistos),
  80     fAODFMD(o.fAODFMD),
  81     fEventInspector(o.fEventInspector),
  82     fEnergyFitter(o.fEnergyFitter),
  83     fSharingFilter(o.fSharingFilter),
  84     fDensityCalculator(o.fDensityCalculator),
  85     fCorrections(o.fCorrections),
  86     fHistCollector(o.fHistCollector),
  87     fList(o.fList)
  88 {
  89   //
  90   // Copy constructor
  91   //
  92   // Parameters:
  93   //    o Object to copy from
  94   //
  95   DefineOutput(1, TList::Class());
  96 }
  97
  98 //____________________________________________________________________
  99 AliForwardMultiplicityTask&
 100 AliForwardMultiplicityTask::operator=(const AliForwardMultiplicityTask& o)
 101 {
 102   //
 103   // Assignment operator
 104   //
 105   // Parameters:
 106   //    o Object to assign from
 107   //
 108   // Return:
 109   //    Reference to this object
 110   //
 111   AliForwardMultiplicityBase::operator=(o);
 112
 113   fHData             = o.fHData;
 114   fEventInspector    = o.fEventInspector;
 115   fEnergyFitter      = o.fEnergyFitter;
 116   fSharingFilter     = o.fSharingFilter;
 117   fDensityCalculator = o.fDensityCalculator;
 118   fCorrections       = o.fCorrections;
 119   fHistCollector     = o.fHistCollector;
 120   fHistos            = o.fHistos;
 121   fAODFMD            = o.fAODFMD;
 122   fList              = o.fList;
 123
 124   return *this;
 125 }
 126
 127 //____________________________________________________________________
 128 void
 129 AliForwardMultiplicityTask::SetDebug(Int_t dbg)
 130 {
 131   //
 132   // Set debug level
 133   //
 134   // Parameters:
 135   //    dbg Debug level
 136   //
 137   fEventInspector.SetDebug(dbg);
 138   fEnergyFitter.SetDebug(dbg);
 139   fSharingFilter.SetDebug(dbg);
 140   fDensityCalculator.SetDebug(dbg);
 141   fCorrections.SetDebug(dbg);
 142   fHistCollector.SetDebug(dbg);
 143 }
 144
 145 //____________________________________________________________________
 146 void
 147 AliForwardMultiplicityTask::InitializeSubs()
 148 {
 149   //
 150   // Initialise the sub objects and stuff.  Called on first event
 151   //
 152   //
 153   const TAxis* pe = 0;
 154   const TAxis* pv = 0;
 155
 156   if (!ReadCorrections(pe,pv)) return;
 157
 158   fHistos.Init(*pe);
 159   fAODFMD.Init(*pe);
 160
 161   fHData = static_cast<TH2D*>(fAODFMD.GetHistogram().Clone("d2Ndetadphi"));
 162   fHData->SetStats(0);
 163   fHData->SetDirectory(0);
 164   fList->Add(fHData);
 165
 166   fEnergyFitter.Init(*pe);
 167   fEventInspector.Init(*pv);
 168   fDensityCalculator.Init(*pe);
 169   fCorrections.Init(*pe);
 170   fHistCollector.Init(*pv);
 171
 172   this->Print();
 173 }
 174
 175 //____________________________________________________________________
 176 void
 177 AliForwardMultiplicityTask::UserCreateOutputObjects()
 178 {
 179   //
 180   // Create output objects
 181   //
 182   //
 183   fList = new TList;
 184
 185   AliAnalysisManager* am = AliAnalysisManager::GetAnalysisManager();
 186   AliAODHandler*      ah =
 187     dynamic_cast<AliAODHandler*>(am->GetOutputEventHandler());
 188   if (!ah) AliFatal("No AOD output handler set in analysis manager");
 189
 190
 191   TObject* obj = &fAODFMD;
 192   ah->AddBranch("AliAODForwardMult", &obj);
 193
 194   fEventInspector.DefineOutput(fList);
 195   fEnergyFitter.DefineOutput(fList);
 196   fSharingFilter.DefineOutput(fList);
 197   fDensityCalculator.DefineOutput(fList);
 198   fCorrections.DefineOutput(fList);
 199
 200   PostData(1, fList);
 201 }
 202 //____________________________________________________________________
 203 void
 204 AliForwardMultiplicityTask::UserExec(Option_t*)
 205 {
 206   //
 207   // Process each event
 208   //
 209   // Parameters:
 210   //    option Not used
 211   //
 212
 213   // static Int_t cnt = 0;
 214   // cnt++;
 215   // Get the input data
 216   AliESDEvent* esd = GetESDEvent();
 217
 218   // Clear stuff
 219   fHistos.Clear();
 220   fESDFMD.Clear();
 221   fAODFMD.Clear();
 222
 223   Bool_t   lowFlux  = kFALSE;
 224   UInt_t   triggers = 0;
 225   UShort_t ivz      = 0;
 226   Double_t vz       = 0;
 227   UInt_t   found    = fEventInspector.Process(esd, triggers, lowFlux, ivz, vz);
 228
 229   if (found & AliFMDEventInspector::kNoEvent)    return;
 230   if (found & AliFMDEventInspector::kNoTriggers) return;
 231
 232   // Set trigger bits, and mark this event for storage
 233   fAODFMD.SetTriggerBits(triggers);
 234   fAODFMD.SetSNN(fEventInspector.GetEnergy());
 235   fAODFMD.SetSystem(fEventInspector.GetCollisionSystem());
 236   MarkEventForStore();
 237
 238   if (found & AliFMDEventInspector::kNoSPD)      return;
 239   if (found & AliFMDEventInspector::kNoFMD)      return;
 240   if (found & AliFMDEventInspector::kNoVertex)   return;
 241   fAODFMD.SetIpZ(vz);
 242
 243   if (found & AliFMDEventInspector::kBadVertex) return;
 244
 245   // We we do not want to use low flux specific code, we disable it here.
 246   if (!fEnableLowFlux) lowFlux = false;
 247
 248   // Get FMD data
 249   AliESDFMD* esdFMD = esd->GetFMDData();
 250   // Apply the sharing filter (or hit merging or clustering if you like)
 251   if (!fSharingFilter.Filter(*esdFMD, lowFlux, fESDFMD)) {
 252     AliWarning("Sharing filter failed!");
 253     return;
 254   }
 255
 256   // Do the energy stuff
 257   if (!fEnergyFitter.Accumulate(*esdFMD, triggers & AliAODForwardMult::kEmpty)){
 258     AliWarning("Energy fitter failed");
 259     return;
 260   }
 261
 262   // Calculate the inclusive charged particle density
 263   if (!fDensityCalculator.Calculate(fESDFMD, fHistos, ivz, lowFlux)) {
 264     AliWarning("Density calculator failed!");
 265     return;
 266   }
 267
 268   // Do the secondary and other corrections.
 269   if (!fCorrections.Correct(fHistos, ivz)) {
 270     AliWarning("Corrections failed");
 271     return;
 272   }
 273
 274   if (!fHistCollector.Collect(fHistos, ivz, fAODFMD.GetHistogram())) {
 275     AliWarning("Histogram collector failed");
 276     return;
 277   }
 278
 279   if (fAODFMD.IsTriggerBits(AliAODForwardMult::kInel))
 280     fHData->Add(&(fAODFMD.GetHistogram()));
 281
 282   PostData(1, fList);
 283 }
 284
 285 //____________________________________________________________________
 286 void
 287 AliForwardMultiplicityTask::Terminate(Option_t*)
 288 {
 289   //
 290   // End of job
 291   //
 292   // Parameters:
 293   //    option Not used
 294   //
 295
 296   TList* list = dynamic_cast<TList*>(GetOutputData(1));
 297   if (!list) {
 298     AliError(Form("No output list defined (%p)", GetOutputData(1)));
 299     if (GetOutputData(1)) GetOutputData(1)->Print();
 300     return;
 301   }
 302
 303   // Get our histograms from the container
 304   TH1I* hEventsTr    = 0;//static_cast<TH1I*>(list->FindObject("nEventsTr"));
 305   TH1I* hEventsTrVtx = 0;//static_cast<TH1I*>(list->FindObject("nEventsTrVtx"));
 306   TH1I* hTriggers    = 0;
 307   if (!fEventInspector.FetchHistograms(list, hEventsTr,
 308                                        hEventsTrVtx, hTriggers)) {
 309     AliError(Form("Didn't get histograms from event selector "
 310                   "(hEventsTr=%p,hEventsTrVtx=%p)",
 311                   hEventsTr, hEventsTrVtx));
 312     list->ls();
 313     return;
 314   }
 315
 316   TH2D* hData        = static_cast<TH2D*>(list->FindObject("d2Ndetadphi"));
 317   if (!hData) {
 318     AliError(Form("Couldn't get our summed histogram from output "
 319                   "list %s (d2Ndetadphi=%p)", list->GetName(), hData));
 320     list->ls();
 321     return;
 322   }
 323
 324   // TH1D* dNdeta = fHData->ProjectionX("dNdeta", 0, -1, "e");
 325   TH1D* dNdeta = hData->ProjectionX("dNdeta", 1, -1, "e");
 326   TH1D* norm   = hData->ProjectionX("norm",   0,  1,  "");
 327   dNdeta->SetTitle("dN_{ch}/d#eta in the forward regions");
 328   dNdeta->SetYTitle("#frac{1}{N}#frac{dN_{ch}}{d#eta}");
 329   dNdeta->Divide(norm);
 330   dNdeta->SetStats(0);
 331   dNdeta->Scale(Double_t(hEventsTrVtx->GetEntries())/hEventsTr->GetEntries(),
 332                 "width");
 333   list->Add(dNdeta);
 334   list->Add(norm);
 335
 336   fEnergyFitter.Fit(list);
 337   fSharingFilter.ScaleHistograms(list,Int_t(hEventsTr->Integral()));
 338   fDensityCalculator.ScaleHistograms(list,Int_t(hEventsTrVtx->Integral()));
 339   fCorrections.ScaleHistograms(list,Int_t(hEventsTrVtx->Integral()));
 340 }
 341
 342 //
 343 // EOF
 344 //