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4fbb2459 | 1 | // |
730ee652 | 2 | // This is an example macro for creation of a pair manager |
3 | // for a resonance analysis with the PWG2/RESONANCES package. | |
4 | // Its output is an AliRsnPairManager which will be added to the task. | |
5 | // It will contain: | |
4fbb2459 | 6 | // - signal (inv. mass) |
730ee652 | 7 | // - true pairs (inv. mass) |
4fbb2459 | 8 | // - like-sign (inv. mass) |
9 | // - true pairs (inv. mass, resolution) | |
730ee652 | 10 | // All histogram are done w.r. to Pt or Eta and w.r. to multiplicity. |
11 | // The binnings are hard-coded. Change them according to your preferences. | |
4fbb2459 | 12 | // |
730ee652 | 13 | // Arguments: |
14 | // -- pairMgrName : a name for the pair manager which must contain | |
15 | // some keywords to choose amond the available cuts | |
16 | // and PID selection available here (this is a personal customization) | |
17 | // -- resonancePDG: PDG code of resonance (for true pairs) | |
18 | // -- type1, type2: particle species for track 1 and 2 in the pair (using AliPID enumeration) | |
4fbb2459 | 19 | // |
730ee652 | 20 | // NOTE: |
21 | // the keyword available here are the following: | |
22 | // -- "NOPID": completely no PID analysis (only primary track cuts are applied) | |
23 | // -- "BB" : all tracks are used, but the TPC Bethe-Bloch cut is applied (cut value = 0.2) | |
24 | // -- "PID" : realistic PID is used | |
4fbb2459 | 25 | // |
730ee652 | 26 | AliRsnPairManager* RsnConfig |
27 | ( | |
28 | const char *pairMgrName, // name for the pair manager | |
29 | Int_t resonancePDG, // PDG code of resonance (for true pairs) | |
30 | AliPID::EParticleType type1, // PID of one member of decay (+) | |
31 | AliPID::EParticleType type2 // PID of other member of decay (-) | |
32 | ) | |
33 | { | |
4fbb2459 | 34 | // === NAME DEFINITIONS ========================================================================= |
35 | ||
eca224a3 | 36 | AliRsnPairManager *pairMgr = new AliRsnPairManager(pairMgrName); |
4fbb2459 | 37 | |
730ee652 | 38 | // examines the given name to define details about track selection and cuts |
39 | TString str(pairMgrName); | |
40 | AliRsnPair::EPairType pidType; | |
41 | Bool_t useBBCut; | |
42 | if (str.Contains("NOPID")) | |
43 | { | |
44 | pidType = AliRsnPair::kNoPID; | |
45 | useBBCut = kFALSE; | |
46 | Info("RsnConfig", "PID TYPE = No PID -- BB CUT: not used"); | |
47 | } | |
48 | else if (str.Contains("BB")) | |
49 | { | |
50 | pidType = AliRsnPair::kNoPID; | |
51 | useBBCut = kTRUE; | |
52 | Info("RsnConfig", "PID TYPE = No PID -- BB CUT: used"); | |
53 | } | |
54 | else if (str.Contains("PID")) | |
55 | { | |
56 | pidType = AliRsnPair::kRealisticPID; | |
57 | useBBCut = kFALSE; | |
58 | Info("RsnConfig", "PID TYPE = Realistic PID -- BB CUT: not used"); | |
59 | } | |
60 | else | |
61 | { | |
62 | Error("RsnConfig", "Unrecognized keywords in the name. Can't continue"); | |
63 | return 0x0; | |
64 | } | |
65 | ||
4fbb2459 | 66 | // === PAIR DEFINITIONS ========================================================================= |
67 | ||
68 | // if particle #1 and #2 are different, two histograms must be built | |
69 | // for each scheme (signal, true, mixed, like-sign) exchanging both particles and signs | |
70 | Int_t i, j, nArray = 1; | |
71 | if (type1 != type2) nArray = 2; | |
72 | ||
73 | AliRsnPairDef *defUnlike[2] = {0, 0}; | |
74 | AliRsnPairDef *defLikePP[2] = {0, 0}; | |
75 | AliRsnPairDef *defLikeMM[2] = {0, 0}; | |
76 | ||
77 | defUnlike[0] = new AliRsnPairDef(type1, '+', type2, '-', resonancePDG); | |
78 | defLikePP[0] = new AliRsnPairDef(type1, '+', type2, '+', resonancePDG); | |
79 | defLikeMM[0] = new AliRsnPairDef(type1, '-', type2, '-', resonancePDG); | |
80 | ||
81 | defUnlike[1] = new AliRsnPairDef(type2, '+', type1, '-', resonancePDG); | |
82 | defLikePP[1] = new AliRsnPairDef(type2, '+', type1, '+', resonancePDG); | |
83 | defLikeMM[1] = new AliRsnPairDef(type2, '-', type1, '-', resonancePDG); | |
84 | ||
85 | // === PAIR ANALYSIS ENGINES ==================================================================== | |
86 | ||
87 | // define null (dummy) objects and initialize only the ones which are needed, | |
88 | // depending again on particle types; | |
89 | // array is organized as follows: | |
90 | // [0] - true pairs | |
91 | // [1] - signal | |
92 | // [2] - like PP | |
93 | // [3] - like MM | |
94 | AliRsnPair *pair[2][4] = {0,0,0,0,0,0,0,0}; | |
95 | ||
96 | for (i = 0; i < nArray; i++) { | |
97 | pair[i][0] = new AliRsnPair(pidType, defUnlike[i]); | |
98 | pair[i][1] = new AliRsnPair(pidType, defUnlike[i]); | |
99 | pair[i][2] = new AliRsnPair(pidType, defLikePP[i]); | |
100 | pair[i][3] = new AliRsnPair(pidType, defLikeMM[i]); | |
101 | } | |
102 | ||
103 | // === CUTS ===================================================================================== | |
104 | ||
105 | // cuts for tracks: | |
106 | // -- primary track quality | |
107 | AliRsnCutESDPrimary *cutESDPrimary = new AliRsnCutESDPrimary("cutESDPrimary"); | |
108 | cutESDPrimary->GetCuts()->SetMaxCovDiagonalElements(2.0, 2.0, 0.5, 0.5, 2.0); | |
109 | cutESDPrimary->GetCuts()->SetRequireSigmaToVertex(kTRUE); | |
730ee652 | 110 | cutESDPrimary->GetCuts()->SetMaxNsigmaToVertex(3.0); |
4fbb2459 | 111 | cutESDPrimary->GetCuts()->SetRequireTPCRefit(kTRUE); |
112 | cutESDPrimary->GetCuts()->SetAcceptKinkDaughters(kFALSE); | |
113 | cutESDPrimary->GetCuts()->SetMinNClustersTPC(50); | |
114 | cutESDPrimary->GetCuts()->SetMaxChi2PerClusterTPC(3.5); | |
115 | // -- Bethe-Bloch with kaon mass hypothesis | |
730ee652 | 116 | Double_t sigmaTPC = 0.065; |
117 | AliRsnCutBetheBloch *cutKaonBB = new AliRsnCutBetheBloch("cutKaonBB", 3.0 * sigmaTPC, AliPID::kKaon); | |
4fbb2459 | 118 | cutKaonBB->SetCalibConstant(0, 0.76176e-1); |
119 | cutKaonBB->SetCalibConstant(1, 10.632); | |
120 | cutKaonBB->SetCalibConstant(2, 0.13279e-4); | |
121 | cutKaonBB->SetCalibConstant(3, 1.8631); | |
122 | cutKaonBB->SetCalibConstant(4, 1.9479); | |
123 | ||
124 | // cuts on pairs: | |
125 | // -- true daughters of a phi resonance (only for true pairs histogram)cutSetPairTrue->AddCut(cutTrue); | |
126 | AliRsnCutStd *cutTruePair = new AliRsnCutStd("cutTrue", AliRsnCutStd::kTruePair, resonancePDG); | |
127 | ||
128 | // cuts on event: | |
129 | // -- none (specified for whole task) | |
130 | ||
131 | // cut set definition for all pairs | |
132 | AliRsnCutSet *cutSetParticle = new AliRsnCutSet("trackCuts"); | |
133 | cutSetParticle->AddCut(cutESDPrimary); | |
730ee652 | 134 | if (useBBCut) |
4fbb2459 | 135 | { |
4fbb2459 | 136 | cutSetParticle->AddCut(cutKaonBB); |
137 | cutSetParticle->SetCutScheme("cutKaonBB&cutESDPrimary"); | |
138 | } | |
139 | else { | |
4fbb2459 | 140 | cutSetParticle->SetCutScheme("cutESDPrimary"); |
141 | } | |
142 | ||
143 | // cut set definition for true pairs | |
144 | AliRsnCutSet *cutSetPairTrue = new AliRsnCutSet("truePairs"); | |
145 | cutSetPairTrue->AddCut(cutTruePair); | |
146 | cutSetPairTrue->SetCutScheme("cutTrue"); | |
147 | ||
148 | // cut manager for all pairs | |
149 | AliRsnCutMgr *cutMgrAll = new AliRsnCutMgr("std", "All"); | |
150 | cutMgrAll->SetCutSet(AliRsnCut::kParticle, cutSetParticle); | |
151 | ||
152 | // cut manager for all pairs | |
153 | AliRsnCutMgr *cutMgrTrue = new AliRsnCutMgr("true", "True"); | |
154 | cutMgrTrue->SetCutSet(AliRsnCut::kParticle, cutSetParticle); | |
155 | cutMgrTrue->SetCutSet(AliRsnCut::kPair, cutSetPairTrue); | |
156 | ||
157 | for (i = 0; i < nArray; i++) { | |
158 | pair[i][0]->SetCutMgr(cutMgrTrue); | |
159 | pair[i][0]->SetOnlyTrue(); | |
160 | for (j = 1; j < 4; j++) { | |
161 | pair[i][j]->SetCutMgr(cutMgrAll); | |
162 | } | |
163 | } | |
164 | ||
165 | // === FUNCTIONS ================================================================================ | |
166 | ||
167 | // define all binnings | |
168 | AliRsnFunctionAxis *axisIM = new AliRsnFunctionAxis(AliRsnFunctionAxis::kPairInvMass, 1000, 0.0, 2.0); | |
18adb0a7 | 169 | AliRsnFunctionAxis *axisPt = new AliRsnFunctionAxis(AliRsnFunctionAxis::kPairPt, 50, 0.0, 10.0); |
170 | AliRsnFunctionAxis *axisEta = new AliRsnFunctionAxis(AliRsnFunctionAxis::kPairEta, 15, -1.5, 1.5); | |
4fbb2459 | 171 | AliRsnFunctionAxis *axisMult = new AliRsnFunctionAxis(AliRsnFunctionAxis::kEventMult, 8, 0.0, 200.0); |
172 | ||
18adb0a7 | 173 | AliRsnFunction *fcn = new AliRsnFunction; |
174 | fcn->AddAxis(axisIM); | |
175 | fcn->AddAxis(axisPt); | |
176 | fcn->AddAxis(axisEta); | |
177 | fcn->AddAxis(axisMult); | |
4fbb2459 | 178 | |
179 | // add functions to pairs | |
180 | for (i = 0; i < nArray; i++) { | |
181 | for (j = 0; j < 4; j++) { | |
18adb0a7 | 182 | pair[i][j]->AddFunction(fcn); |
4fbb2459 | 183 | } |
184 | } | |
185 | ||
186 | // === ADD TO PAIR MANAGER ====================================================================== | |
187 | ||
188 | for (i = 0; i < nArray; i++) { | |
189 | for (j = 0; j < 4; j++) { | |
190 | pairMgr->AddPair(pair[i][j]); | |
191 | } | |
192 | } | |
193 | ||
194 | return pairMgr; | |
195 | } |