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2e04885f | 1 | ///////////////////////////////////////////////////////////////////////////// |
2 | // // | |
3 | // AliFemtoPairCutResonances - a pair cut which checks // | |
4 | // for some pair qualities that attempt to identify slit/doubly // | |
5 | // reconstructed tracks and also selects pairs based on their separation // | |
6 | // at the entrance to the TPC // | |
7 | // // | |
8 | ///////////////////////////////////////////////////////////////////////////// | |
9 | ||
10 | #include "AliFemtoPairCutResonances.h" | |
11 | #include <string> | |
12 | #include <cstdio> | |
13 | #include <TMath.h> | |
14 | ||
15 | #ifdef __ROOT__ | |
16 | ClassImp(AliFemtoPairCutResonances) | |
17 | #endif | |
18 | ||
19 | //__________________ | |
20 | AliFemtoPairCutResonances::AliFemtoPairCutResonances(): | |
21 | AliFemtoShareQualityPairCut(), | |
22 | fMaxEEMinv(0.0), | |
23 | fMaxDTheta(0.0), | |
24 | fDataType(kAOD), | |
25 | fSwitchPassFail(0) | |
26 | { | |
27 | } | |
28 | //__________________ | |
29 | AliFemtoPairCutResonances::AliFemtoPairCutResonances(const AliFemtoPairCutResonances& c) : | |
30 | AliFemtoShareQualityPairCut(c), | |
31 | fMaxEEMinv(0.0), | |
32 | fMaxDTheta(0.0), | |
33 | fDataType(kAOD), | |
34 | fSwitchPassFail(0) | |
35 | { | |
36 | fMaxEEMinv = c.fMaxEEMinv; | |
37 | fMaxDTheta = c.fMaxDTheta; | |
38 | fDataType = c.fDataType; | |
39 | fSwitchPassFail=c.fSwitchPassFail; | |
40 | } | |
41 | ||
42 | AliFemtoPairCutResonances& AliFemtoPairCutResonances::operator=(const AliFemtoPairCutResonances& c) | |
43 | { | |
44 | if (this != &c) { | |
45 | fMaxEEMinv = c.fMaxEEMinv; | |
46 | fMaxDTheta = c.fMaxDTheta; | |
47 | fDataType = c.fDataType; | |
48 | fSwitchPassFail=c.fSwitchPassFail; | |
49 | } | |
50 | ||
51 | return *this; | |
52 | ||
53 | } | |
54 | //__________________ | |
55 | AliFemtoPairCutResonances::~AliFemtoPairCutResonances(){ | |
56 | } | |
57 | //__________________ | |
58 | bool AliFemtoPairCutResonances::Pass(const AliFemtoPair* pair){ | |
59 | // Accept pairs based on their TPC entrance separation and | |
60 | // quality and sharity | |
61 | bool temp = true; | |
62 | ||
63 | if(fDataType==kKine) | |
64 | return true; | |
65 | ||
66 | double me = 0.000511; | |
67 | double mPi = 0.13957018; | |
68 | double mp = 0.938272046; | |
69 | ||
70 | double mK0min = 0.00049; | |
71 | double mK0max = 0.00051; | |
72 | double mK0 = 0.000497614; | |
73 | double mRhomin = 0.000765; | |
74 | double mRhomax = 0.000785; | |
75 | double mRho = 0.00077526; | |
76 | double mLmin = 1.095; | |
77 | double mLmax = 1.135; | |
78 | double mL = 1.115683; | |
79 | ||
80 | if ((pair->Track1()->Track()->Charge() * pair->Track2()->Track()->Charge()) < 0.0) { | |
81 | double theta1 = pair->Track1()->Track()->P().Theta(); | |
82 | double theta2 = pair->Track2()->Track()->P().Theta(); | |
83 | double dtheta = TMath::Abs(theta1 - theta2); | |
84 | ||
85 | // check on ee pairs (gamma) | |
86 | double e1 = TMath::Sqrt(me*me + pair->Track1()->Track()->P().Mag2()); | |
87 | double e2 = TMath::Sqrt(me*me + pair->Track2()->Track()->P().Mag2()); | |
88 | double minvGamma = 2*me*me + 2*(e1*e2 - | |
89 | pair->Track1()->Track()->P().x()*pair->Track2()->Track()->P().x() - | |
90 | pair->Track1()->Track()->P().y()*pair->Track2()->Track()->P().y() - | |
91 | pair->Track1()->Track()->P().z()*pair->Track2()->Track()->P().z()); | |
92 | if ( minvGamma < fMaxEEMinv ) | |
93 | temp = false; | |
94 | //check on resonances | |
95 | double pi1 = TMath::Sqrt(mPi*mPi + pair->Track1()->Track()->P().Mag2()); | |
96 | double pi2 = TMath::Sqrt(mPi*mPi + pair->Track2()->Track()->P().Mag2()); | |
97 | double p1 = TMath::Sqrt(mp*mp + pair->Track1()->Track()->P().Mag2()); | |
98 | double p2 = TMath::Sqrt(mp*mp + pair->Track2()->Track()->P().Mag2()); | |
99 | //check on K0 and Rho | |
100 | double minv2pi = 2*mPi*mPi + 2*(pi1*pi2 - | |
101 | pair->Track1()->Track()->P().x()*pair->Track2()->Track()->P().x() - | |
102 | pair->Track1()->Track()->P().y()*pair->Track2()->Track()->P().y() - | |
103 | pair->Track1()->Track()->P().z()*pair->Track2()->Track()->P().z()); | |
104 | if ( ((minv2pi>mK0min && minv2pi<mK0max) || (minv2pi>mRhomin && minv2pi<mRhomax)) ) | |
105 | temp = false; | |
106 | //check on L0 | |
107 | double minvpPi = 2*mp*mPi + 2*(p1*pi2 - | |
108 | pair->Track1()->Track()->P().x()*pair->Track2()->Track()->P().x() - | |
109 | pair->Track1()->Track()->P().y()*pair->Track2()->Track()->P().y() - | |
110 | pair->Track1()->Track()->P().z()*pair->Track2()->Track()->P().z()); | |
111 | double minvPip = 2*mPi*mp + 2*(pi1*p2 - | |
112 | pair->Track1()->Track()->P().x()*pair->Track2()->Track()->P().x() - | |
113 | pair->Track1()->Track()->P().y()*pair->Track2()->Track()->P().y() - | |
114 | pair->Track1()->Track()->P().z()*pair->Track2()->Track()->P().z()); | |
115 | if( ((minvpPi>mLmin) && (minvpPi<mLmax)) || ((minvPip>mLmin) && (minvPip<mLmax)) ) | |
116 | temp = false; | |
117 | } | |
118 | if (fSwitchPassFail) // choose only resonances | |
119 | { | |
120 | if (!temp) { | |
121 | temp = AliFemtoShareQualityPairCut::Pass(pair); | |
122 | if (temp) {fNPairsPassed++;} | |
123 | else fNPairsFailed++; | |
124 | return temp; | |
125 | } | |
126 | else | |
127 | { | |
128 | fNPairsFailed++; | |
129 | return false; | |
130 | } | |
131 | } | |
132 | else // cut resonances | |
133 | { | |
134 | if (temp) { | |
135 | temp = AliFemtoShareQualityPairCut::Pass(pair); | |
136 | if (temp) {fNPairsPassed++;} | |
137 | else fNPairsFailed++; | |
138 | return temp; | |
139 | } | |
140 | else | |
141 | { | |
142 | fNPairsFailed++; | |
143 | return false; | |
144 | } | |
145 | } | |
146 | } | |
147 | //__________________ | |
148 | AliFemtoString AliFemtoPairCutResonances::Report(){ | |
149 | // Prepare a report from the execution | |
150 | string stemp = "AliFemtoPairCutResonances Pair Cut - remove pairs possibly coming from Gamma conversions\n"; | |
151 | char ctemp[100]; | |
152 | stemp += ctemp; | |
153 | snprintf(ctemp , 100, "Number of pairs which passed:\t%ld Number which failed:\t%ld\n",fNPairsPassed,fNPairsFailed); | |
154 | stemp += ctemp; | |
155 | AliFemtoString returnThis = stemp; | |
156 | return returnThis;} | |
157 | //__________________ | |
158 | ||
159 | TList *AliFemtoPairCutResonances::ListSettings() | |
160 | { | |
161 | // return a list of settings in a writable form | |
162 | TList *tListSetttings = AliFemtoShareQualityPairCut::ListSettings(); | |
163 | char buf[200]; | |
164 | snprintf(buf, 200, "AliFemtoPairCutResonances.maxeeminv=%f", fMaxEEMinv); | |
165 | snprintf(buf, 200, "AliFemtoPairCutResonances.maxdtheta=%f", fMaxDTheta); | |
166 | tListSetttings->AddLast(new TObjString(buf)); | |
167 | ||
168 | return tListSetttings; | |
169 | } | |
170 | ||
171 | void AliFemtoPairCutResonances::SetMaxEEMinv(Double_t maxeeminv) | |
172 | { | |
173 | fMaxEEMinv = maxeeminv; | |
174 | } | |
175 | ||
176 | void AliFemtoPairCutResonances::SetMaxThetaDiff(Double_t maxdtheta) | |
177 | { | |
178 | fMaxDTheta = maxdtheta; | |
179 | } | |
180 | ||
181 | void AliFemtoPairCutResonances::SetDataType(AliFemtoDataType type) | |
182 | { | |
183 | fDataType = type; | |
184 | } | |
185 | ||
186 | void AliFemtoPairCutResonances::SetChooseResonances(bool onlyResonances) | |
187 | { | |
188 | fSwitchPassFail = onlyResonances; | |
189 | } |