1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
16 #include "AliMuonPairCuts.h"
20 #include "TLorentzVector.h"
24 #include "AliVParticle.h"
25 #include "AliInputEventHandler.h"
28 ClassImp(AliMuonPairCuts) // Class implementation in ROOT context
31 //________________________________________________________________________
32 AliMuonPairCuts::AliMuonPairCuts() :
39 //________________________________________________________________________
40 AliMuonPairCuts::AliMuonPairCuts(const char* name, const char* title) :
41 AliAnalysisCuts(name, title),
42 fMuonTrackCuts("muonTrackCutInPair","muonTrackCutInPair")
45 SetDefaultFilterMask();
49 //________________________________________________________________________
50 AliMuonPairCuts::AliMuonPairCuts(const char* name, const char* title, const AliMuonTrackCuts& trackCuts) :
51 AliAnalysisCuts(name, title),
52 fMuonTrackCuts(trackCuts)
55 SetDefaultFilterMask();
59 //________________________________________________________________________
60 AliMuonPairCuts::AliMuonPairCuts(const AliMuonPairCuts& obj) :
62 fMuonTrackCuts(obj.fMuonTrackCuts)
68 //________________________________________________________________________
69 AliMuonPairCuts& AliMuonPairCuts::operator=(const AliMuonPairCuts& obj)
71 /// Assignment operator
73 AliAnalysisCuts::operator=(obj);
74 fMuonTrackCuts = obj.fMuonTrackCuts;
80 //________________________________________________________________________
81 AliMuonPairCuts::~AliMuonPairCuts()
86 //________________________________________________________________________
87 Bool_t AliMuonPairCuts::SetRun ( const AliInputEventHandler* eventHandler )
89 /// Get parameters from OADB for runNumber
90 return fMuonTrackCuts.SetRun(eventHandler);
94 //________________________________________________________________________
95 Bool_t AliMuonPairCuts::IsSelected( TObject* /*obj*/ )
98 AliError("Requires a list of two AliVParticle");
102 //________________________________________________________________________
103 Bool_t AliMuonPairCuts::IsSelected( TList* list )
106 UInt_t filterMask = GetFilterMask();
107 UInt_t selectionMask = GetSelectionMask(list);
109 return ( ( selectionMask & filterMask ) == filterMask );
113 //________________________________________________________________________
114 UInt_t AliMuonPairCuts::GetSelectionMask( const TObject* obj )
116 /// Get selection mask (overloaded function)
117 const TList* list = static_cast<const TList*> ( obj );
118 if ( list->GetEntries() < 2 ) {
119 AliError("Requires a list of two AliVParticle");
123 return GetSelectionMask(list->At(0), list->At(1));
128 //________________________________________________________________________
129 UInt_t AliMuonPairCuts::GetSelectionMask( const TObject* track1, const TObject* track2 )
131 /// Get selection mask from AliVParticles
133 UInt_t selectionMask = 0;
135 UInt_t maskTrack1 = fMuonTrackCuts.GetSelectionMask(track1);
136 UInt_t maskTrack2 = fMuonTrackCuts.GetSelectionMask(track2);
138 UInt_t maskAND = maskTrack1 & maskTrack2;
139 UInt_t maskOR = maskTrack1 | maskTrack2;
140 if ( maskAND & AliMuonTrackCuts::kMuEta ) selectionMask |= kBothMuEta;
141 if ( maskAND & AliMuonTrackCuts::kMuThetaAbs ) selectionMask |= kBothMuThetaAbs;
142 if ( maskAND & AliMuonTrackCuts::kMuPdca ) selectionMask |= kBothMuPdca;
143 if ( maskAND & AliMuonTrackCuts::kMuTrackChiSquare ) selectionMask |= kBothMuTrackChiSquare;
144 if ( maskAND & AliMuonTrackCuts::kMuMatchApt ) selectionMask |= kBothMuMatchApt;
145 if ( maskAND & AliMuonTrackCuts::kMuMatchLpt ) selectionMask |= kBothMuMatchLpt;
146 if ( maskAND & AliMuonTrackCuts::kMuMatchHpt ) selectionMask |= kBothMuMatchHpt;
147 if ( maskOR & AliMuonTrackCuts::kMuMatchApt ) selectionMask |= kOneMuMatchApt;
148 if ( maskOR & AliMuonTrackCuts::kMuMatchLpt ) selectionMask |= kOneMuMatchLpt;
149 if ( maskOR & AliMuonTrackCuts::kMuMatchHpt ) selectionMask |= kOneMuMatchHpt;
151 TLorentzVector vec[2];
152 Double_t chargeProduct = 1.;
153 for ( Int_t itrack=0; itrack<2; ++itrack ) {
154 const AliVParticle* track = static_cast<const AliVParticle*> ( ( itrack == 0 ) ? track1 : track2 );
155 chargeProduct *= track->Charge();
156 Double_t trackP = track->P();
157 Double_t energy = TMath::Sqrt(trackP*trackP + MuonMass2());
158 vec[itrack].SetPxPyPzE(track->Px(), track->Py(), track->Pz(), energy);
161 if ( chargeProduct < 0. ) selectionMask |= kDimuUnlikeSign;
163 TLorentzVector vecPair = vec[0] + vec[1];
164 Double_t rapidity = vecPair.Rapidity();
165 if ( rapidity > -4. && rapidity < -2.5 ) selectionMask |= kDimuRapidity;
167 return selectionMask;
171 //_____________________________________________________________________________
172 Double_t AliMuonPairCuts::MuonMass2() const
174 /// A usefull constant
175 static Double_t m2 = 1.11636129640000012e-02;
180 //________________________________________________________________________
181 void AliMuonPairCuts::SetDefaultFilterMask ()
183 /// Standard cuts for muon pair
184 SetFilterMask ( kBothMuEta | kBothMuThetaAbs | kBothMuMatchLpt | kDimuUnlikeSign | kDimuRapidity );
187 //________________________________________________________________________
188 void AliMuonPairCuts::SetIsMC ( Bool_t isMC )
191 fMuonTrackCuts.SetIsMC(isMC);
194 //________________________________________________________________________
195 Bool_t AliMuonPairCuts::TrackPtCutMatchTrigClass ( const AliVParticle* track1, const AliVParticle* track2, const TArrayI ptCutFromClass ) const
197 /// Check if track pair passes the trigger pt cut level used in the trigger class
198 Bool_t matchTrig1 = fMuonTrackCuts.TrackPtCutMatchTrigClass(track1, ptCutFromClass);
199 Bool_t matchTrig2 = fMuonTrackCuts.TrackPtCutMatchTrigClass(track2, ptCutFromClass);
201 Bool_t matchTrackerPt1 = kTRUE, matchTrackerPt2 = kTRUE;
202 if ( IsApplySharpPtCutInMatching() ) {
203 matchTrackerPt1 = ( track1->Pt() >= fMuonTrackCuts.GetMuonTrackCutsParam().GetSharpPtCut(ptCutFromClass[0]-1,kFALSE) );
204 matchTrackerPt2 = ( track2->Pt() >= fMuonTrackCuts.GetMuonTrackCutsParam().GetSharpPtCut(ptCutFromClass[0]-1,kFALSE) );
207 matchTrig1 = ( matchTrig1 && matchTrackerPt1 );
208 matchTrig2 = ( matchTrig2 && matchTrackerPt2 );
210 Bool_t passCut = ( ptCutFromClass[1]>0 ) ? ( matchTrig1 && matchTrig2 ) : ( matchTrig1 || matchTrig2 );
212 AliDebug(1,Form("Class matchTrig %i %i trackMatchTrig %i %i trackPt %g %g (required %i) passCut %i", ptCutFromClass[0], ptCutFromClass[1], matchTrig1, matchTrig2, track1->Pt(), track2->Pt(), IsApplySharpPtCutInMatching(),passCut));
216 //________________________________________________________________________
217 void AliMuonPairCuts::Print(Option_t* option) const
223 TString sopt(option);
225 if ( sopt.IsNull() || sopt.Contains("*") || sopt.Contains("all") ) sopt += " pair trackparam trackmask";
226 if ( sopt.Contains("pair") ) {
227 UInt_t filterMask = GetFilterMask();
228 printf(" *** Muon pair filter mask: *** \n");
229 printf(" 0x%x\n", filterMask);
230 if ( filterMask & kBothMuEta ) printf(" mu1 && mu2 pass eta cut\n");
231 if ( filterMask & kBothMuThetaAbs ) printf(" mu1 && mu2 pass theta_abs cut\n");
232 if ( filterMask & kBothMuPdca ) printf(" mu1 && mu2 pass pxDCA cut\n");
233 if ( filterMask & kBothMuTrackChiSquare ) printf(" Chi2 cut on track\n");
234 if ( filterMask & kBothMuMatchApt ) printf(" mu1 && mu2 match Apt\n");
235 if ( filterMask & kBothMuMatchLpt ) printf(" mu1 && mu2 match Lpt\n");
236 if ( filterMask & kBothMuMatchHpt ) printf(" mu1 && mu2 match Hpt\n");
237 if ( filterMask & kOneMuMatchApt ) printf(" mu1 || mu2 match Apt\n");
238 if ( filterMask & kOneMuMatchLpt ) printf(" mu1 || mu2 match Lpt\n");
239 if ( filterMask & kOneMuMatchHpt ) printf(" mu1 || mu2 match Hpt\n");
240 if ( filterMask & kDimuUnlikeSign ) printf(" Unlike sign\n");
241 if ( filterMask & kDimuRapidity ) printf(" -4 < y_{mumu} < -2.5\n");
242 printf(" ******************** \n");
245 if ( sopt.Contains("track") )
246 fMuonTrackCuts.Print(sopt.Data());