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3244eeed | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-2006, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
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 | **************************************************************************/ | |
15 | ||
16 | ///////////////////////////////////////////////////////////// | |
17 | // | |
18 | // Base class for AOD reconstructed heavy-flavour 3-prong decay | |
19 | // | |
20 | // Author: E.Bruna bruna@to.infn.it, F.Prino prino@to.infn.it | |
21 | ///////////////////////////////////////////////////////////// | |
22 | ||
23 | #include <TDatabasePDG.h> | |
24 | #include "AliAODRecoDecayHF.h" | |
25 | #include "AliAODRecoDecayHF3Prong.h" | |
26 | ||
27 | ClassImp(AliAODRecoDecayHF3Prong) | |
28 | ||
29 | //-------------------------------------------------------------------------- | |
30 | AliAODRecoDecayHF3Prong::AliAODRecoDecayHF3Prong() : | |
31 | AliAODRecoDecayHF(), | |
32 | fSigmaVert(0), | |
33 | fDist12toPrim(0), | |
34 | fDist23toPrim(0) | |
35 | { | |
36 | // | |
37 | // Default Constructor | |
38 | // | |
39 | } | |
40 | //-------------------------------------------------------------------------- | |
41 | AliAODRecoDecayHF3Prong::AliAODRecoDecayHF3Prong(AliAODVertex *vtx2, | |
42 | Double_t *px,Double_t *py,Double_t *pz, | |
43 | Double_t *d0,Double_t *d0err, | |
44 | Double_t *dca, Double_t sigvert, | |
45 | Double_t dist12,Double_t dist23,Short_t charge) : | |
46 | AliAODRecoDecayHF(vtx2,3,charge,px,py,pz,d0,d0err), | |
47 | fSigmaVert(sigvert), | |
48 | fDist12toPrim(dist12), | |
49 | fDist23toPrim(dist23) | |
50 | { | |
51 | // | |
52 | // Constructor with AliAODVertex for decay vertex | |
53 | // | |
6185d025 | 54 | SetDCAs(3,dca); |
3244eeed | 55 | } |
56 | //-------------------------------------------------------------------------- | |
57 | AliAODRecoDecayHF3Prong::AliAODRecoDecayHF3Prong(AliAODVertex *vtx2, | |
58 | Double_t *d0,Double_t *d0err, | |
59 | Double_t *dca, Double_t sigvert, | |
60 | Double_t dist12,Double_t dist23, Short_t charge) : | |
61 | AliAODRecoDecayHF(vtx2,3,charge,d0,d0err), | |
62 | fSigmaVert(sigvert), | |
63 | fDist12toPrim(dist12), | |
64 | fDist23toPrim(dist23) | |
65 | { | |
66 | // | |
67 | // Constructor with AliAODVertex for decay vertex and without prongs momenta | |
68 | // | |
6185d025 | 69 | SetDCAs(3,dca); |
3244eeed | 70 | } |
71 | //-------------------------------------------------------------------------- | |
72 | AliAODRecoDecayHF3Prong::AliAODRecoDecayHF3Prong(const AliAODRecoDecayHF3Prong &source) : | |
73 | AliAODRecoDecayHF(source), | |
74 | fSigmaVert(source.fSigmaVert), | |
75 | fDist12toPrim(source.fDist12toPrim), | |
76 | fDist23toPrim(source.fDist23toPrim) | |
77 | { | |
78 | // | |
79 | // Copy constructor | |
80 | // | |
81 | } | |
82 | //-------------------------------------------------------------------------- | |
83 | AliAODRecoDecayHF3Prong &AliAODRecoDecayHF3Prong::operator=(const AliAODRecoDecayHF3Prong &source) | |
84 | { | |
85 | // | |
86 | // assignment operator | |
87 | // | |
88 | if(&source == this) return *this; | |
dcb444c9 | 89 | |
90 | AliAODRecoDecayHF::operator=(source); | |
91 | ||
3244eeed | 92 | fDist12toPrim= source.fDist12toPrim; |
93 | fDist23toPrim= source.fDist23toPrim; | |
94 | fSigmaVert= source.fSigmaVert; | |
dcb444c9 | 95 | |
3244eeed | 96 | return *this; |
97 | } | |
98 | //-------------------------------------------------------------------------- | |
99 | Bool_t AliAODRecoDecayHF3Prong::SelectDplus(const Double_t *cuts) | |
100 | const { | |
101 | // | |
102 | // This function compares the Dplus with a set of cuts: | |
103 | // | |
104 | // cuts[0] = inv. mass half width [GeV] | |
105 | // cuts[1] = pTK [GeV/c] | |
106 | // cuts[2] = pTPi [GeV/c] | |
107 | // cuts[3] = d0K [cm] lower limit! | |
108 | // cuts[4] = d0Pi [cm] lower limit! | |
109 | // cuts[5] = dist12 (cm) | |
110 | // cuts[6] = sigmavert (cm) | |
111 | // cuts[7] = dist prim-sec (cm) | |
112 | // cuts[8] = pM=Max{pT1,pT2,pT3} (GeV/c) | |
113 | // cuts[9] = cosThetaPoint | |
114 | // cuts[10] = Sum d0^2 (cm^2) | |
115 | // cuts[11] = dca cut (cm) | |
116 | // | |
117 | // If candidate Dplus does not pass the cuts return kFALSE | |
118 | // | |
119 | ||
120 | Double_t mDplusPDG = TDatabasePDG::Instance()->GetParticle(411)->Mass(); | |
121 | Double_t mDplus=InvMassDplus(); | |
122 | if(TMath::Abs(mDplus-mDplusPDG)>cuts[0])return kFALSE; | |
123 | //single track | |
124 | if(TMath::Abs(PtProng(1)) < cuts[1] || TMath::Abs(Getd0Prong(1))<cuts[3])return kFALSE;//Kaon | |
125 | if(TMath::Abs(PtProng(0)) < cuts[2] || TMath::Abs(Getd0Prong(0))<cuts[4])return kFALSE;//Pion1 | |
126 | if(TMath::Abs(PtProng(2)) < cuts[2] || TMath::Abs(Getd0Prong(2))<cuts[4])return kFALSE;//Pion2 | |
127 | ||
128 | //DCA | |
81679460 | 129 | for(Int_t i=0;i<3;i++) if(GetDCA(i)>cuts[11])return kFALSE; |
3244eeed | 130 | |
131 | //2track cuts | |
132 | if(fDist12toPrim<cuts[5] || fDist23toPrim<cuts[5])return kFALSE; | |
133 | if(Getd0Prong(0)*Getd0Prong(1)<0. && Getd0Prong(2)*Getd0Prong(1)<0.)return kFALSE; | |
134 | ||
135 | //sec vert | |
136 | if(fSigmaVert>cuts[6])return kFALSE; | |
137 | ||
138 | if(DecayLength()<cuts[7])return kFALSE; | |
139 | ||
140 | if(TMath::Abs(PtProng(0))<cuts[8] && TMath::Abs(PtProng(1))<cuts[8] && TMath::Abs(PtProng(2))<cuts[8])return kFALSE; | |
141 | if(CosPointingAngle() < cuts[9])return kFALSE; | |
142 | Double_t sum2=Getd0Prong(0)*Getd0Prong(0)+Getd0Prong(1)*Getd0Prong(1)+Getd0Prong(2)*Getd0Prong(2); | |
143 | if(sum2<cuts[10])return kFALSE; | |
144 | return kTRUE; | |
145 | } | |
79250a2b | 146 | //-------------------------------------------------------------------------- |
9fce5365 | 147 | Bool_t AliAODRecoDecayHF3Prong::SelectDs(const Double_t *cuts,Int_t &okDsKKpi,Int_t &okDspiKK, Int_t &okMassPhi, Int_t &okMassK0star) |
79250a2b | 148 | const { |
149 | // | |
6ea608bf | 150 | // This function compares the Ds with a set of cuts |
151 | // (same variables as D+, for now) | |
79250a2b | 152 | // |
153 | // cuts[0] = inv. mass half width [GeV] | |
6ea608bf | 154 | // cuts[1] = pTK [GeV/c] |
155 | // cuts[2] = pTPi [GeV/c] | |
156 | // cuts[3] = d0K [cm] lower limit! | |
157 | // cuts[4] = d0Pi [cm] lower limit! | |
158 | // cuts[5] = dist12 (cm) | |
159 | // cuts[6] = sigmavert (cm) | |
160 | // cuts[7] = dist prim-sec (cm) | |
161 | // cuts[8] = pM=Max{pT1,pT2,pT3} (GeV/c) | |
162 | // cuts[9] = cosThetaPoint | |
163 | // cuts[10] = Sum d0^2 (cm^2) | |
164 | // cuts[11] = dca cut (cm) | |
9fce5365 | 165 | // cuts[12] = max. inv. mass difference(Mphi-MKK) [GeV] |
166 | // cuts[13] = max. inv. mass difference(MK0*-MKpi) [GeV] | |
79250a2b | 167 | // |
168 | // If candidate Ds does not pass the cuts return kFALSE | |
169 | // | |
170 | Double_t mDsKKpi,mDspiKK; | |
171 | okDsKKpi=1; okDspiKK=1; | |
9fce5365 | 172 | okMassPhi=0; okMassK0star=0; |
79250a2b | 173 | |
174 | Double_t mDsPDG = TDatabasePDG::Instance()->GetParticle(431)->Mass(); | |
175 | ||
176 | mDsKKpi=InvMassDsKKpi(); | |
177 | mDspiKK=InvMassDspiKK(); | |
178 | ||
179 | if(TMath::Abs(mDsKKpi-mDsPDG)>cuts[0]) okDsKKpi = 0; | |
180 | if(TMath::Abs(mDspiKK-mDsPDG)>cuts[0]) okDspiKK = 0; | |
181 | if(!okDsKKpi && !okDspiKK) return kFALSE; | |
182 | ||
6ea608bf | 183 | //single track |
184 | if(TMath::Abs(PtProng(0)) < cuts[1] || TMath::Abs(Getd0Prong(0))<cuts[3])return kFALSE;//Kaon1 | |
185 | if(TMath::Abs(PtProng(1)) < cuts[1] || TMath::Abs(Getd0Prong(1))<cuts[3])return kFALSE;//Kaon2 | |
81679460 | 186 | if(TMath::Abs(PtProng(2)) < cuts[2] || TMath::Abs(Getd0Prong(2))<cuts[4])return kFALSE;//Pion |
6ea608bf | 187 | |
81679460 | 188 | // cuts on resonant decays (via Phi or K0*) |
81679460 | 189 | Double_t mPhiPDG = TDatabasePDG::Instance()->GetParticle(333)->Mass(); |
9fce5365 | 190 | Double_t mK0starPDG = TDatabasePDG::Instance()->GetParticle(313)->Mass(); |
191 | if(okDsKKpi){ | |
192 | Double_t mass01phi=InvMass2Prongs(0,1,321,321); | |
193 | Double_t mass12K0s=InvMass2Prongs(1,2,321,211); | |
194 | if(TMath::Abs(mass01phi-mPhiPDG)<cuts[12]) okMassPhi=1; | |
195 | if(TMath::Abs(mass12K0s-mK0starPDG)<cuts[13]) okMassK0star = 1; | |
196 | if(!okMassPhi && !okMassK0star) okDsKKpi=kFALSE; | |
197 | } | |
198 | if(okDspiKK){ | |
199 | Double_t mass01K0s=InvMass2Prongs(0,1,211,321); | |
200 | Double_t mass12phi=InvMass2Prongs(1,2,321,321); | |
201 | if(TMath::Abs(mass01K0s-mK0starPDG)<cuts[13]) okMassK0star = 1; | |
202 | if(TMath::Abs(mass12phi-mPhiPDG)<cuts[12]) okMassPhi=1; | |
203 | if(!okMassPhi && !okMassK0star) okDspiKK=kFALSE; | |
204 | } | |
205 | if(!okDsKKpi && !okDspiKK) return kFALSE; | |
206 | ||
207 | ||
208 | ||
81679460 | 209 | |
6ea608bf | 210 | //DCA |
81679460 | 211 | for(Int_t i=0;i<3;i++) if(GetDCA(i)>cuts[11])return kFALSE; |
6ea608bf | 212 | |
213 | //2track cuts | |
214 | if(fDist12toPrim<cuts[5] || fDist23toPrim<cuts[5])return kFALSE; | |
6ea608bf | 215 | |
216 | //sec vert | |
217 | if(fSigmaVert>cuts[6])return kFALSE; | |
218 | ||
219 | if(DecayLength()<cuts[7])return kFALSE; | |
220 | ||
221 | if(TMath::Abs(PtProng(0))<cuts[8] && TMath::Abs(PtProng(1))<cuts[8] && TMath::Abs(PtProng(2))<cuts[8])return kFALSE; | |
222 | if(CosPointingAngle() < cuts[9])return kFALSE; | |
223 | Double_t sum2=Getd0Prong(0)*Getd0Prong(0)+Getd0Prong(1)*Getd0Prong(1)+Getd0Prong(2)*Getd0Prong(2); | |
224 | if(sum2<cuts[10])return kFALSE; | |
225 | ||
79250a2b | 226 | return kTRUE; |
227 | } | |
228 | //-------------------------------------------------------------------------- | |
229 | Bool_t AliAODRecoDecayHF3Prong::SelectLc(const Double_t *cuts,Int_t &okLcpKpi,Int_t &okLcpiKp) | |
230 | const { | |
231 | // | |
6ea608bf | 232 | // This function compares the Lc with a set of cuts |
233 | // (same variables as D+, for now) | |
79250a2b | 234 | // |
235 | // cuts[0] = inv. mass half width [GeV] | |
6ea608bf | 236 | // cuts[1] = pTP [GeV/c] |
237 | // cuts[2] = pTPi and pTK [GeV/c] | |
238 | // cuts[3] = d0P [cm] lower limit! | |
239 | // cuts[4] = d0Pi and d0K [cm] lower limit! | |
240 | // cuts[5] = dist12 (cm) | |
241 | // cuts[6] = sigmavert (cm) | |
242 | // cuts[7] = dist prim-sec (cm) | |
243 | // cuts[8] = pM=Max{pT1,pT2,pT3} (GeV/c) | |
244 | // cuts[9] = cosThetaPoint | |
245 | // cuts[10] = Sum d0^2 (cm^2) | |
246 | // cuts[11] = dca cut (cm) | |
79250a2b | 247 | // |
248 | // If candidate Lc does not pass the cuts return kFALSE | |
249 | // | |
250 | Double_t mLcpKpi,mLcpiKp; | |
251 | okLcpKpi=1; okLcpiKp=1; | |
252 | ||
253 | Double_t mLcPDG = TDatabasePDG::Instance()->GetParticle(4122)->Mass(); | |
254 | ||
255 | mLcpKpi=InvMassLcpKpi(); | |
256 | mLcpiKp=InvMassLcpiKp(); | |
257 | ||
258 | if(TMath::Abs(mLcpKpi-mLcPDG)>cuts[0]) okLcpKpi = 0; | |
259 | if(TMath::Abs(mLcpiKp-mLcPDG)>cuts[0]) okLcpiKp = 0; | |
260 | if(!okLcpKpi && !okLcpiKp) return kFALSE; | |
261 | ||
6ea608bf | 262 | //single track |
263 | if(TMath::Abs(PtProng(0)) < cuts[1] || TMath::Abs(Getd0Prong(0))<cuts[3])return kFALSE;//Proton | |
264 | if(TMath::Abs(PtProng(1)) < cuts[2] || TMath::Abs(Getd0Prong(1))<cuts[4])return kFALSE;//Kaon | |
265 | if(TMath::Abs(PtProng(2)) < cuts[2] || TMath::Abs(Getd0Prong(2))<cuts[4])return kFALSE;//Pion | |
266 | ||
267 | //DCA | |
81679460 | 268 | for(Int_t i=0;i<3;i++) if(GetDCA(i)>cuts[11])return kFALSE; |
6ea608bf | 269 | |
270 | //2track cuts | |
271 | if(fDist12toPrim<cuts[5] || fDist23toPrim<cuts[5])return kFALSE; | |
272 | if(Getd0Prong(0)*Getd0Prong(1)<0. && Getd0Prong(2)*Getd0Prong(1)<0.)return kFALSE; | |
273 | ||
274 | //sec vert | |
275 | if(fSigmaVert>cuts[6])return kFALSE; | |
276 | ||
277 | if(DecayLength()<cuts[7])return kFALSE; | |
278 | ||
279 | if(TMath::Abs(PtProng(0))<cuts[8] && TMath::Abs(PtProng(1))<cuts[8] && TMath::Abs(PtProng(2))<cuts[8])return kFALSE; | |
280 | if(CosPointingAngle() < cuts[9])return kFALSE; | |
281 | Double_t sum2=Getd0Prong(0)*Getd0Prong(0)+Getd0Prong(1)*Getd0Prong(1)+Getd0Prong(2)*Getd0Prong(2); | |
282 | if(sum2<cuts[10])return kFALSE; | |
283 | ||
79250a2b | 284 | return kTRUE; |
285 | } |