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aec0ec32 | 1 | // |
2 | // *** Class AliRsnPair *** | |
3 | // | |
4 | // "Core" method for defining the work on a pari of particles. | |
5 | // For one analysis, one must setup one of this for each pair he wants to analyze, | |
6 | // adding to it all analysis which he desires to do. | |
7 | // Here he defines the cuts, and the particle types and charges, and can add | |
8 | // functions which do different operations on the same pair, and some binning | |
9 | // with respect to some kinematic variables (eta, momentum) | |
10 | // | |
11 | // authors: A. Pulvirenti (email: alberto.pulvirenti@ct.infn.it) | |
12 | // M. Vala (email: martin.vala@cern.ch) | |
13 | // | |
14 | ||
4fbb2459 | 15 | #include <TList.h> |
aec0ec32 | 16 | |
17 | #include "AliLog.h" | |
18 | ||
2dab9030 | 19 | #include "AliRsnMother.h" |
2dab9030 | 20 | #include "AliRsnCutSet.h" |
aec0ec32 | 21 | |
22 | #include "AliRsnPair.h" | |
23 | ||
24 | ClassImp(AliRsnPair) | |
25 | ||
26 | //_____________________________________________________________________________ | |
2dab9030 | 27 | AliRsnPair::AliRsnPair(const char *name, AliRsnPairDef *def) : |
2a1c7696 | 28 | TNamed(name, ""), |
29 | fOnlyTrue(kFALSE), | |
30 | fCheckDecay(kFALSE), | |
31 | fIsMixed(kFALSE), | |
32 | fCount(0), | |
33 | fPairDef(def), | |
34 | fCutManager(Form("cutMgr_%s", name)), | |
35 | fMother() | |
aec0ec32 | 36 | { |
37 | // | |
38 | // Default constructor | |
39 | // | |
aec0ec32 | 40 | } |
413bbf44 | 41 | |
42 | //_____________________________________________________________________________ | |
43 | AliRsnPair::AliRsnPair(const AliRsnPair& copy) : | |
2a1c7696 | 44 | TNamed(copy), |
45 | fOnlyTrue(copy.fOnlyTrue), | |
46 | fCheckDecay(copy.fCheckDecay), | |
47 | fIsMixed(copy.fIsMixed), | |
48 | fCount(copy.fCount), | |
49 | fPairDef(copy.fPairDef), | |
50 | fCutManager(copy.fCutManager), | |
51 | fMother(copy.fMother) | |
413bbf44 | 52 | { |
53 | // | |
54 | // Default constructor | |
55 | // | |
413bbf44 | 56 | } |
57 | ||
58 | //_____________________________________________________________________________ | |
59 | AliRsnPair& AliRsnPair::operator=(const AliRsnPair& copy) | |
60 | { | |
2a1c7696 | 61 | fOnlyTrue = copy.fOnlyTrue; |
62 | fCheckDecay = copy.fCheckDecay; | |
63 | fIsMixed = copy.fIsMixed; | |
64 | fCount = copy.fCount; | |
65 | fPairDef = copy.fPairDef; | |
66 | fMother = copy.fMother; | |
67 | fCutManager = copy.fCutManager; | |
68 | ||
69 | return (*this); | |
413bbf44 | 70 | } |
71 | ||
aec0ec32 | 72 | //_____________________________________________________________________________ |
73 | AliRsnPair::~AliRsnPair() | |
74 | { | |
75 | // | |
76 | // Destructor | |
77 | // | |
aec0ec32 | 78 | } |
79 | ||
aec0ec32 | 80 | //_____________________________________________________________________________ |
78b94cbd | 81 | void AliRsnPair::Print(Option_t* /*option*/) const |
aec0ec32 | 82 | { |
83 | // | |
84 | // Prints info about pair | |
85 | // | |
922688c0 | 86 | } |
87 | ||
88 | //_____________________________________________________________________________ | |
2dab9030 | 89 | Bool_t AliRsnPair::Fill |
11ed73f6 | 90 | (AliRsnDaughter *daughter1, AliRsnDaughter *daughter2) |
922688c0 | 91 | { |
92 | // | |
11ed73f6 | 93 | // Checks that first argument matches definitions for first daughter |
94 | // and the same for second argument, where the order is defined by | |
95 | // the AliRsnPairDef data member. | |
96 | // If the matching is successful, the AliRsnMother data member is | |
97 | // initialized using the mass hypotheses defined here and the momenta | |
98 | // in the passed daughters. | |
99 | // | |
100 | ||
101 | // check matching and exit if one of them fails | |
102 | // if true pair is required, this is taken into account: | |
103 | // if both true pairs and correct decay tree is required, | |
104 | // then we must be sure that also the true PID of daughters matches, | |
105 | // instead if correct decay tree is not required this additional check is not done | |
106 | if (!fPairDef->GetDef1()->MatchesDaughter(daughter1, fOnlyTrue && fCheckDecay)) return kFALSE; | |
107 | if (!fPairDef->GetDef2()->MatchesDaughter(daughter2, fOnlyTrue && fCheckDecay)) return kFALSE; | |
108 | ||
2b0c74c3 | 109 | // if matching is successful |
110 | // compute 4-momenta of daughters and mother | |
111 | fMother.SetDaughters(daughter1, fPairDef->GetMass1(), daughter2, fPairDef->GetMass2()); | |
112 | ||
11ed73f6 | 113 | // if required a true pair, check this here and eventually return a fail message |
114 | // this is done using the method AliRsnMother::CommonMother with 2 arguments | |
115 | // passed by reference, where the real GEANT label of the particle is stored | |
116 | // and one can check if these tracks are both really secondaries (ID >= 0) | |
117 | if (fOnlyTrue) { | |
118 | Int_t m0, m1, common; | |
119 | common = fMother.CommonMother(m0, m1); | |
120 | if (m0 < 0 || m1 < 0) return kFALSE; | |
121 | if (common != fPairDef->GetMotherPDG()) return kFALSE; | |
122 | } | |
123 | ||
11ed73f6 | 124 | // point to first event as reference |
125 | // and checks the pair cuts, | |
126 | // (done first because it is more likely | |
127 | // that it is not passed and execution is faster) | |
128 | AliRsnTarget::SwitchToFirst(); | |
129 | if (!fCutManager.PassMotherCuts(&fMother)) return kFALSE; | |
2a1c7696 | 130 | |
131 | // cuts on track #1 & common | |
132 | AliRsnTarget::SwitchToFirst(); | |
11ed73f6 | 133 | if (!fCutManager.PassDaughter1Cuts(daughter1)) { |
2a1c7696 | 134 | AliDebug(AliLog::kDebug + 2, "Specific cuts for track #1 not passed"); |
135 | return kFALSE; | |
136 | } | |
11ed73f6 | 137 | if (!fCutManager.PassCommonDaughterCuts(daughter1)) { |
2a1c7696 | 138 | AliDebug(AliLog::kDebug + 2, "Common cuts for track #1 not passed"); |
139 | return kFALSE; | |
140 | } | |
141 | ||
142 | // cuts on track #2 & common | |
143 | AliRsnTarget::SwitchToSecond(); | |
11ed73f6 | 144 | if (!fCutManager.PassDaughter2Cuts(daughter2)) { |
2a1c7696 | 145 | AliDebug(AliLog::kDebug + 2, "Specific cuts for track #2 not passed"); |
32992791 | 146 | return kFALSE; |
2a1c7696 | 147 | } |
11ed73f6 | 148 | if (!fCutManager.PassCommonDaughterCuts(daughter2)) { |
2a1c7696 | 149 | AliDebug(AliLog::kDebug + 2, "Common cuts for track #2 not passed"); |
32992791 | 150 | return kFALSE; |
2a1c7696 | 151 | } |
152 | ||
2a1c7696 | 153 | // if pair is accepted, increment counter |
154 | ++fCount; | |
155 | ||
156 | return kTRUE; | |
aec0ec32 | 157 | } |
158 | ||
159 | //_____________________________________________________________________________ | |
2dab9030 | 160 | void AliRsnPair::Compute() |
aec0ec32 | 161 | { |
162 | // | |
2dab9030 | 163 | // Virtual method to compute pair quantities of interest |
aec0ec32 | 164 | // |
aec0ec32 | 165 | |
2a1c7696 | 166 | AliWarning("Implement this method in derived classes"); |
aec0ec32 | 167 | } |
168 | ||
169 | //_____________________________________________________________________________ | |
2dab9030 | 170 | void AliRsnPair::Init(const char* /*prefix*/, TList* /*list*/) |
aec0ec32 | 171 | { |
172 | // | |
2dab9030 | 173 | // Virtual method to compute pair quantities of interest |
aec0ec32 | 174 | // |
5eb970a4 | 175 | |
2a1c7696 | 176 | AliWarning("Implement this method in derived classes"); |
aec0ec32 | 177 | } |