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Fix in pt weighting
[u/mrichter/AliRoot.git] / PWG3 / hfe / AliHFEV0cuts.cxx
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c04c80e6 1/**************************************************************************
2* Copyright(c) 1998-1999, 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// * 20/04/2010 *
16// Class for optimising and applying V0 cuts to obtain clean V0 samples
17// Compatible with ESDs only
18//
19// Authors:
20// Matus Kalisky <matus.kalisky@cern.ch>
21//
22
23#include "TDatabasePDG.h"
24
25#include "AliESDtrack.h"
26#include "AliMCEvent.h"
27#include "AliESDv0.h"
28#include "AliKFParticle.h"
29#include "AliKFVertex.h"
3a72645a 30#include "AliLog.h"
e97c2edf 31#include "AliExternalTrackParam.h"
c04c80e6 32
33#include "AliHFEcollection.h"
34
35#include "AliHFEV0cuts.h"
36
37ClassImp(AliHFEV0cuts)
38
39//________________________________________________________________
40AliHFEV0cuts::AliHFEV0cuts():
41 fQA(NULL)
3a72645a 42 , fQAmc(NULL)
c04c80e6 43 , fMCEvent(NULL)
44 , fInputEvent(NULL)
45 , fPrimaryVertex(NULL)
3a72645a 46 , fCurrentV0id(0)
47 , fPdaughterPDG(0)
48 , fNdaughterPDG(0)
c04c80e6 49{
50
51 //
52 // Default constructor
53 //
54
55
56}
57//________________________________________________________________
58AliHFEV0cuts::~AliHFEV0cuts()
59{
60 //
61 // destructor
62 //
63 if (fQA) delete fQA;
3a72645a 64 if (fQAmc) delete fQAmc;
c04c80e6 65}
66
67//________________________________________________________________
68AliHFEV0cuts::AliHFEV0cuts(const AliHFEV0cuts &ref):
69 TObject(ref)
70 , fQA(NULL)
3a72645a 71 , fQAmc(NULL)
c04c80e6 72 , fMCEvent(NULL)
73 , fInputEvent(NULL)
74 , fPrimaryVertex(NULL)
3a72645a 75 , fCurrentV0id(0)
76 , fPdaughterPDG(0)
77 , fNdaughterPDG(0)
c04c80e6 78{
79 //
80 // Copy constructor
81 //
82 ref.Copy(*this);
83}
84//________________________________________________________________
85AliHFEV0cuts &AliHFEV0cuts::operator=(const AliHFEV0cuts &ref){
86 //
87 // Assignment operator
88 //
89 if(this != &ref)
90 ref.Copy(*this);
91 return *this;
92}
93//________________________________________________________________
94void AliHFEV0cuts::Copy(TObject &ref) const{
95 //
96 // Copy function
97 //
98 AliHFEV0cuts &target = dynamic_cast<AliHFEV0cuts &>(ref);
99
100 if(fQA) target.fQA = dynamic_cast<AliHFEcollection *>(fQA->Clone());
101
3a72645a 102 if(fQAmc) target.fQAmc = dynamic_cast<AliHFEcollection *>(fQAmc->Clone());
103
c04c80e6 104 if(target.fMCEvent) delete target.fMCEvent;
105 target.fMCEvent = new AliMCEvent;
106
107 if(target.fPrimaryVertex) delete target.fPrimaryVertex;
108 target.fPrimaryVertex = new AliKFVertex;
109
110 TObject::Copy(ref);
111
112}
113//___________________________________________________________________
114void AliHFEV0cuts::Init(const char* name){
115 //
116 // initialize the output objects and create histograms
117 //
118
119 //
120 // all the "h_cut_XXX" histograms hare cut value distributions:
121 // [0] for all candidates
122 // [1] jus before the cut on given variable was applied, but after all the previous cuts
123 //
124
125 fQA = new AliHFEcollection("fQA", name);
126
3a72645a 127 fQAmc = new AliHFEcollection("fQAmc", name);
c04c80e6 128
129 // common for all V0s
130 fQA->CreateTH2Fvector1(2, "h_all_AP", "armenteros plot for all V0 candidates", 200, -1, 1, 200, 0, 0.25);
131
132 // gammas
133 fQA->CreateTH1Fvector1(2, "h_cut_Gamma_CosPoint", "Gamma Cosine pointing angle; cos point. angle; counts", 100, 0, 0.1);
134 fQA->CreateTH1Fvector1(2, "h_cut_Gamma_DCA", "DCA between the gamma daughters; dca (cm); counts", 100, 0, 2);
3a72645a 135 fQA->CreateTH1Fvector1(2, "h_cut_Gamma_VtxR_old", "*old* Radius of the gamma conversion vertex; r (cm); counts", 1000, 0, 100);
c04c80e6 136 fQA->CreateTH1Fvector1(2, "h_cut_Gamma_VtxR", "Radius of the gamma conversion vertex; r (cm); counts", 1000, 0, 100);
c04c80e6 137 fQA->CreateTH1Fvector1(2, "h_cut_Gamma_PP", "gamma psi pair angle; psi pairangle (rad); counts", 100, 0, 2);
3a72645a 138 fQA->CreateTH1Fvector1(2, "h_cut_Gamma_Chi2", "gamma Chi2/NDF; Chi2/NDF; counts", 100, 0, 50);
c2690925 139 fQA->CreateTH1Fvector1(2, "h_cut_Gamma_Sep", "gamma separation dist at TPC inned wall", 100, 0, 10);
3a72645a 140 fQA->CreateTH1Fvector1(7, "h_Gamma_Mass", "Invariant mass of gammas; mass (GeV/c^{2}); counts", 100, 0, 0.2);
e97c2edf 141
c04c80e6 142
143 // kaons
144 fQA->CreateTH1Fvector1(2, "h_cut_K0_CosPoint", "K0 Cosine pointing angle; cos point. angle; counts", 100, 0, 0.1);
145 fQA->CreateTH1Fvector1(2, "h_cut_K0_DCA", "DCA between the K0 daughters; dca (cm); counts", 100, 0, 2);
146 fQA->CreateTH1Fvector1(2, "h_cut_K0_VtxR", "Radius of the K0 decay vertex; r (cm); counts", 1000, 0, 100);
3a72645a 147 fQA->CreateTH1Fvector1(2, "h_cut_K0_Chi2", "K0 Chi2/NDF; Chi2/NDF; counts", 100, 0, 50);
148 fQA->CreateTH1Fvector1(5, "h_K0_Mass", "Invariant mass of K0; mass (GeV/c^{2}); counts", 125, 0.45, 0.55);
c04c80e6 149
150 // lambda
151 fQA->CreateTH1Fvector1(2, "h_cut_L_CosPoint", "L Cosine pointing angle; cos point. angle; counts", 100, 0, 0.1);
152 fQA->CreateTH1Fvector1(2, "h_cut_L_DCA", "DCA between the L daughters; dca (cm); counts", 100, 0, 2);
153 fQA->CreateTH1Fvector1(2, "h_cut_L_VtxR", "Radius of the L decay vertex; r (cm); counts", 1000, 0, 100);
3a72645a 154 fQA->CreateTH1Fvector1(2, "h_cut_L_Chi2", "L Chi2/NDF; Chi2/NDF; counts", 100, 0, 50);
155 fQA->CreateTH1Fvector1(5, "h_L_Mass", "Invariant mass of L; mass (GeV/c^{2}); counts", 60, 1.1, 1.13);
156 fQA->CreateTH1Fvector1(5, "h_AL_Mass", "Invariant mass of anti L; mass (GeV/c^{2}); counts", 60, 1.1, 1.13);
c04c80e6 157
158 fQA->CreateTH2F("h_L_checks", "Lambda candidate check[0] -v- check[1]; check[0]; check[1]", 5, -0.75, 1.75, 6, -0.75, 1.75 );
159
160 // electrons
e97c2edf 161 fQA->CreateTH1Fvector1(7, "h_Electron_P", "Momenta of conversion electrons -cuts-; P (GeV/c); counts", 50, 0.1, 20, 0);
c04c80e6 162
163 // K0 pions
164 fQA->CreateTH1Fvector1(8, "h_PionK0_P", "Momenta of K0 pions -cuts-; P (GeV/c) counts;", 50, 0.1, 20, 0);
165
166 // L pions
3a72645a 167 fQA->CreateTH1Fvector1(9, "h_PionL_P", "Momenta of L pions -cuts-; P (GeV/c) counts;", 50, 0.1, 20, 0);
c04c80e6 168
169 // L protons
170 fQA->CreateTH1Fvector1(9, "h_ProtonL_P", "Momenta of L protons -cuts-; P (GeV/c) counts;", 50, 0.1, 20, 0);
171
172 // single track cuts
173 fQA->CreateTH1F("h_ST_NclsTPC", "Number of TPC clusters", 161, -1, 160);
174 fQA->CreateTH1F("h_ST_TPCrefit", "TPC refit", 2, -0.5, 1.5);
175 fQA->CreateTH1F("h_ST_chi2TPCcls", "chi2 per TPC cluster", 100, 0, 10);
176 fQA->CreateTH1F("h_ST_TPCclsR", "TPC cluster ratio", 120, -0.1, 1.1);
177 fQA->CreateTH1F("h_ST_kinks", "kinks", 2, -0.5, 1.5);
178 fQA->CreateTH1F("h_ST_pt", "track pt", 100, 0.1, 20, 0);
179 fQA->CreateTH1F("h_ST_eta", "track eta", 100, -1.5, 1.5);
180
181 //
182 // possibly new cuts
183 //
e97c2edf 184 fQA->CreateTH2Fvector1(2, "h_cut_L_rdp_v_mp", "relative L daughter mom -v- mother mom; L mom (GeV/c); relative daughter mom p2/p1", 100, 0.1, 10, 100, 0, 1);
c04c80e6 185
186 // THnSparse histograms
187
188 // THnSparse for the K0 mass
189 // to be looked at after merging run by run
190 // axes: mass, pt, theta, phi
191 {
192 Int_t nBin[4] = {100, 10, 10, 18};
193 Double_t nMin[4] = {0.45, 0.1, 0., 0.};
194 Double_t nMax[4] = {0.55, 10., TMath::Pi(), 2*TMath::Pi()};
195 TString htitle = "K0 sparse; mass (GeV/c^{2}); p_{T} (GeV/c); theta (rad); phi(rad)";
196 fQA->CreateTHnSparse("hK0", htitle, 4, nBin, nMin, nMax);
197 fQA->BinLogAxis("hK0", 1);
198 }
199
3a72645a 200
201 //
202 // MC plots for checking and tuning the V0 cuts
203 //
204
205 const char *v0[4] = {"G", "K", "L"}; // to keep the names short
206 // number of V0s left after each cut step - for signal and background - within given mass window
207 for(Int_t i=0; i<3; ++i){
208 fQAmc->CreateTH1F(Form("h_%s_cuts_S", v0[i]), Form("h_%s_cuts_S", v0[i]), 10, -0.5, 9.5);
209 fQAmc->CreateTH1F(Form("h_%s_cuts_B", v0[i]), Form("h_%s_cuts_B", v0[i]), 10, -0.5, 9.5);
210 }
211
212 //
213 // cut distributions for signal and background
214 //
215
216 const Float_t pMin = 0.1;
217 const Float_t pMax = 10.;
218 const Int_t pN = 12;
219
220
221 // gamma signal
222 fQAmc->CreateTH2Fvector1(2, "h_cut_Gamma_CosPoint_S", "S - Gamma Cosine pointing angle; mom (GeV/c); cos point. angle", pN, pMin, pMax, 50, 0, 0.1, 0);
223 fQAmc->CreateTH2Fvector1(2, "h_cut_Gamma_DCA_S", "S - DCA between the gamma daughters; mom (GeV/c); dca (cm)", pN, pMin, pMax, 50, 0, 2, 0);
224 fQAmc->CreateTH2Fvector1(2, "h_cut_Gamma_VtxR_S", "S - Radius of the gamma conversion vertex; mom (GeV/c); r (cm)", pN, pMin, pMax, 100, 0, 100, 0);
3a72645a 225 fQAmc->CreateTH2Fvector1(2, "h_cut_Gamma_PP_S", "S - gamma psi pair angle; mom (GeV/c); psi pairangle (rad)", pN, pMin, pMax, 50, 0, 0.5, 0);
c2690925 226 fQAmc->CreateTH2Fvector1(2, "h_cut_Gamma_Chi2_S", "S - gamma Chi2/NDF; mom (GeV/c); Chi2/NDF", pN, pMin, pMax, 50, 0, 25, 0);
227 fQAmc->CreateTH2Fvector1(2, "h_cut_Gamma_Sep_S", "S - gamma separation TPC-inner; mom (GeV/c); tracks separatin (cm)", pN, pMin, pMax, 100, 0, 10, 0);
228 // as a function of radius, not momentum
229 fQAmc->CreateTH2Fvector1(2, "h_cut_Gamma_SepR_S", "S - gamma separation TPC-inner; radius cm; tracks separatin (cm)", 20, 0, 100, 100, 0, 20);
3a72645a 230
e97c2edf 231 fQAmc->CreateTH1Fvector1(9, "h_Gamma_Mass_S", "S - Invariant mass of gammas; mass (GeV/c^{2}); counts", 100, 0, 0.2);
3a72645a 232 // gamma background
233 fQAmc->CreateTH2Fvector1(2, "h_cut_Gamma_CosPoint_B", "B - Gamma Cosine pointing angle; mom (GeV/c); cos point. angle", pN, pMin, pMax, 50, 0, 0.1, 0);
234 fQAmc->CreateTH2Fvector1(2, "h_cut_Gamma_DCA_B", "B - DCA between the gamma daughters; mom (GeV/c); dca (cm)", pN, pMin, pMax, 50, 0, 2, 0);
235 fQAmc->CreateTH2Fvector1(2, "h_cut_Gamma_VtxR_B", "B - Radius of the gamma conversion vertex; mom (GeV/c); r (cm)", pN, pMin, pMax, 100, 0, 100, 0);
3a72645a 236 fQAmc->CreateTH2Fvector1(2, "h_cut_Gamma_PP_B", "B - gamma psi pair angle; mom (GeV/c); psi pairangle (rad)", pN, pMin, pMax, 50, 0, 0.5, 0);
c2690925 237 fQAmc->CreateTH2Fvector1(2, "h_cut_Gamma_Chi2_B", "B - gamma Chi2/NDF; mom (GeV/c); Chi2/NDF", pN, pMin, pMax, 50, 0, 25, 0);
e97c2edf 238 fQAmc->CreateTH2Fvector1(2, "h_cut_Gamma_Sep_B", "B - gamma separation TPC-inner; mom (GeV/c); tracks separatin (cm)", pN, pMin, pMax, 100, 0, 50, 0);
c2690925 239 //
240 fQAmc->CreateTH2Fvector1(2, "h_cut_Gamma_SepR_B", "S - gamma separation TPC-inner; radius cm; tracks separatin (cm)", 20, 0, 100, 100, 0, 20);
e97c2edf 241 fQAmc->CreateTH1Fvector1(9, "h_Gamma_Mass_B", "B - Invariant mass of gammas; mass (GeV/c^{2}); counts", 100, 0, 0.2);
3a72645a 242
243 // kaons signal
244 fQAmc->CreateTH2Fvector1(2, "h_cut_K0_CosPoint_S", "S - K0 Cosine pointing angle; mom (GeV/c); cos point. angle", pN, pMin, pMax, 50, 0, 0.1, 0);
245 fQAmc->CreateTH2Fvector1(2, "h_cut_K0_DCA_S", "S - DCA between the K0 daughters; mom (GeV/c); dca (cm)", pN, pMin, pMax, 50, 0, 2, 0);
246 fQAmc->CreateTH2Fvector1(2, "h_cut_K0_VtxR_S", "S - Radius of the K0 decay vertex; mom (GeV/c); r (cm)", pN, pMin, pMax, 50, 0, 100, 0);
c2690925 247 fQAmc->CreateTH2Fvector1(2, "h_cut_K0_Chi2_S", "S - K0 Chi2/NDF; mom (GeV/c); Chi2/NDF", pN, pMin, pMax, 50, 0, 25, 0);
3a72645a 248
249 fQAmc->CreateTH1Fvector1(5, "h_K0_Mass_S", "S - Invariant mass of K0; mass (GeV/c^{2}); counts", 125, 0.45, 0.55);
250 // kaons background
251 fQAmc->CreateTH2Fvector1(2, "h_cut_K0_CosPoint_B", "B - K0 Cosine pointing angle; mom (GeV/c); cos point. angle", pN, pMin, pMax, 50, 0, 0.1, 0);
252 fQAmc->CreateTH2Fvector1(2, "h_cut_K0_DCA_B", "B - DCA between the K0 daughters; mom (GeV/c); dca (cm)", pN, pMin, pMax, 50, 0, 2, 0);
253 fQAmc->CreateTH2Fvector1(2, "h_cut_K0_VtxR_B", "B - Radius of the K0 decay vertex; mom (GeV/c); r (cm)", pN, pMin, pMax, 50, 0, 100, 0);
c2690925 254 fQAmc->CreateTH2Fvector1(2, "h_cut_K0_Chi2_B", "B - K0 Chi2/NDF; mom (GeV/c); Chi2/NDF", pN, pMin, pMax, 50, 0, 50, 0);
3a72645a 255
256 fQAmc->CreateTH1Fvector1(5, "h_K0_Mass_B", "B - Invariant mass of K0; mass (GeV/c^{2}); counts", 125, 0.45, 0.55);
257
258 // lambda signal
259 fQAmc->CreateTH2Fvector1(2, "h_cut_L_CosPoint_S", "S - L Cosine pointing angle; mom (GeV/c); cos point. angle", pN, pMin, pMax, 50, 0, 0.1, 0);
260 fQAmc->CreateTH2Fvector1(2, "h_cut_L_DCA_S", "S - DCA between the L daughters; mom (GeV/c); dca (cm)", pN, pMin, pMax, 50, 0, 2, 0);
261 fQAmc->CreateTH2Fvector1(2, "h_cut_L_VtxR_S", "S - Radius of the L decay vertex; mom (GeV/c); r (cm)", pN, pMin, pMax, 50, 0, 100, 0);
c2690925 262 fQAmc->CreateTH2Fvector1(2, "h_cut_L_Chi2_S", "S - L Chi2/NDF; mom (GeV/c); Chi2/NDF", pN, pMin, pMax, 50, 0, 50, 0);
3a72645a 263
264 fQAmc->CreateTH1Fvector1(5, "h_L_Mass_S", "S - Invariant mass of L; mass (GeV/c^{2}); counts", 60, 1.1, 1.13);
265 fQAmc->CreateTH1Fvector1(5, "h_AL_Mass_S", "S - Invariant mass of anti L; mass (GeV/c^{2}); counts", 60, 1.1, 1.13);
266 // lambda background
267 fQAmc->CreateTH2Fvector1(2, "h_cut_L_CosPoint_B", "B - L Cosine pointing angle; mom (GeV/c); cos point. angle", pN, pMin, pMax, 50, 0, 0.1, 0);
268 fQAmc->CreateTH2Fvector1(2, "h_cut_L_DCA_B", "B - DCA between the L daughters; mom (GeV/c); dca (cm)", pN, pMin, pMax, 50, 0, 2, 0);
269 fQAmc->CreateTH2Fvector1(2, "h_cut_L_VtxR_B", "B - Radius of the L decay vertex; mom (GeV/c); r (cm)", pN, pMin, pMax, 50, 0, 100, 0);
c2690925 270 fQAmc->CreateTH2Fvector1(2, "h_cut_L_Chi2_B", "B - L Chi2/NDF; mom (GeV/c); Chi2/NDF", pN, pMin, pMax, 50, 0, 50, 0);
3a72645a 271 fQAmc->CreateTH2Fvector1(2, "h_cut_L_rdp_v_mp_S", "S - relative L daughter mom -v- mother mom; L mom (GeV/c); relative daughter mom p2/p1", 100, 0.1, 10, 100, 0, 1);
272 fQAmc->CreateTH2Fvector1(2, "h_cut_L_rdp_v_mp_B", "B - relative L daughter mom -v- mother mom; L mom (GeV/c); relative daughter mom p2/p1", 100, 0.1, 10, 100, 0, 1);
273 fQAmc->CreateTH1Fvector1(5, "h_LAL_Mass_B", "B - Invariant mass of anti L; mass (GeV/c^{2}); counts", 60, 1.1, 1.13);
274
275
276 // MC tagged daughter track momentum distribution after each cut step
277// fQAmc->CreateTH1Fvector1(10, "h_electron_p_S", "h_electron_p_S", 20, 0.1, 20, 0);
278// fQAmc->CreateTH1Fvector1(10, "h_K0pion_p_S", "h_K0pion_p_S", 20, 0.1, 20, 0);
279// fQAmc->CreateTH1Fvector1(10, "h_Lpion_p_S", "h_Lpion_p_S", 20, 0.1, 20, 0);
280// fQAmc->CreateTH1Fvector1(10, "h_proton_p_S", "h_proton_p_S", 20, 0.1, 20, 0);
281
282 // V0 momnetum distribution of MC tagged signal and backglound after all cuts
283 fQAmc->CreateTH1F("h_gamma_p_S", "true gammas after all cuts", 20, 0.1, 10, 0);
284 fQAmc->CreateTH1F("h_gamma_p_B", "true gamma BG after all cuts", 20, 0.1, 10, 0);
285 fQAmc->CreateTH1F("h_K0_p_S", "true K0s after all cuts", 20, 0.1, 10, 0);
286 fQAmc->CreateTH1F("h_K0_p_B", "true K0 BG after all cuts", 20, 0.1, 10, 0);
287 fQAmc->CreateTH1F("h_lambda_p_S", "MC true lambdas after all cuts", 20, 0.1, 10, 0);
288 fQAmc->CreateTH1F("h_lambda_p_B", "MC true lambda BG after all cuts", 20, 0.1, 10, 0);
289 fQAmc->CreateTH1F("h_alambda_p_S", "MC true anti-lambdas after all cuts", 20, 0.1, 10, 0);
290 fQAmc->CreateTH1F("h_alambda_p_B", "MC true anti-lambda BG after all cuts", 20, 0.1, 10, 0);
291
292 // invariant mass ditributions for the V0 for different hypoteses (gamma, K0, L, AL)
293 fQAmc->CreateTH1F("h_Mass_gamma_as_K0","h_Mass_gamma_as_K0", 200, 0, 2);
294 fQAmc->CreateTH1F("h_Mass_gamma_as_L","h_Mass_gamma_as_L", 200, 0, 2);
295 fQAmc->CreateTH1F("h_Mass_K0_as_G", "h_Mass_K0_as_gamma", 200, 0, 2);
296 fQAmc->CreateTH1F("h_Mass_K0_as_L", "h_Mass_K0_as_Lambda", 200, 0, 2);
297 fQAmc->CreateTH1F("h_Mass_L_as_G", "h_Mass_L_as_gamma", 200, 0, 2);
298 fQAmc->CreateTH1F("h_Mass_L_as_K0", "h_Mass_L_as_K0", 200, 0, 2);
299
300 // Invariant mass distribution of MC tagged signal for diffrent momenta
301 fQAmc->CreateTH2F("h_gamma_MvP_S", "mc tagged gammas - signal; p (GeV/c); m (GeV/c^{2})", 12, 0.1, 20, 100, 0., 0.1, 0);
302 fQAmc->CreateTH2F("h_K0_MvP_S", "mc tagged K0s - signal; p (GeV/c); m (GeV/c^{2})", 12, 0.1, 20, 100, 0.45, 0.55, 0);
303 fQAmc->CreateTH2F("h_lambda_MvP_S", "mc tagged Lambdas - signal; p (GeV/c); m (GeV/c^{2})", 12, 0.1, 20, 100, 1.08, 1.14, 0);
304
305 // electrons
306 fQAmc->CreateTH1Fvector1(8, "h_Electron_P_S", "MC-S momenta of conversion electrons -cuts-; P (GeV/c); counts", 20, 0.1, 20, 0);
307 fQAmc->CreateTH1Fvector1(8, "h_Electron_P_B", "MC-B momenta of conversion electrons -cuts-; P (GeV/c); counts", 20, 0.1, 20, 0);
308
309 // K0 pions
310 fQAmc->CreateTH1Fvector1(7, "h_PionK0_P_S", "MC-S momenta of K0 pions -cuts-; P (GeV/c) counts;", 20, 0.1, 20, 0);
311 fQAmc->CreateTH1Fvector1(7, "h_PionK0_P_B", "MC-B momenta of K0 pions -cuts-; P (GeV/c) counts;", 20, 0.1, 20, 0);
312
313 // L pions
314 fQAmc->CreateTH1Fvector1(8, "h_PionL_P_S", "MC-S momenta of L pions -cuts-; P (GeV/c) counts;", 20, 0.1, 50, 0);
315 fQAmc->CreateTH1Fvector1(8, "h_PionL_P_B", "MC-B momenta of L pions -cuts-; P (GeV/c) counts;", 20, 0.1, 50, 0);
316
317 // L protons
318 fQAmc->CreateTH1Fvector1(8, "h_ProtonL_P_S", "MC-S momenta of L protons -cuts-; P (GeV/c) counts;", 20, 0.1, 20, 0);
319 fQAmc->CreateTH1Fvector1(8, "h_ProtonL_P_B", "MC-B momenta of L protons -cuts-; P (GeV/c) counts;", 20, 0.1, 20, 0);
320
321
322
323 // cut efficiencies
c04c80e6 324}
325//________________________________________________________________
326Bool_t AliHFEV0cuts::TrackCutsCommon(AliESDtrack* track){
327 //
328 // singe track cuts commom for all particle candidates
329 //
330
331 if(!track) return kFALSE;
3a72645a 332
c04c80e6 333
334 // status word
335 ULong_t status = track->GetStatus();
336
337
338 // No. of TPC clusters
339 fQA->Fill("h_ST_NclsTPC", track->GetTPCNcls());
e97c2edf 340 if(track->GetTPCNcls() < 1) return kFALSE; //
c04c80e6 341
342 // TPC refit
343 if((status & AliESDtrack::kTPCrefit)){
344 fQA->Fill("h_ST_TPCrefit", 1);
345 }
346 if(!(status & AliESDtrack::kTPCrefit)){
347 fQA->Fill("h_ST_TPCrefit", 0);
348 return kFALSE;
349 }
350
351 // Chi2 per TPC cluster
352 Int_t nTPCclusters = track->GetTPCclusters(0);
353 Float_t chi2perTPCcluster = track->GetTPCchi2()/Float_t(nTPCclusters);
354 fQA->Fill("h_ST_chi2TPCcls", chi2perTPCcluster);
e97c2edf 355 if(chi2perTPCcluster > 4.0) return kFALSE; // 4.0
c04c80e6 356
357 // TPC cluster ratio
358 Float_t cRatioTPC = track->GetTPCNclsF() > 0. ? static_cast<Float_t>(track->GetTPCNcls())/static_cast<Float_t> (track->GetTPCNclsF()) : 1.;
359 fQA->Fill("h_ST_TPCclsR", cRatioTPC);
360 if(cRatioTPC < 0.6) return kFALSE;
361
362 // kinks
363 fQA->Fill("h_ST_kinks", track->GetKinkIndex(0));
364 if(track->GetKinkIndex(0) != 0) return kFALSE;
365
366 // pt
367 fQA->Fill("h_ST_pt",track->Pt());
e97c2edf 368 //if(track->Pt() < 0.1 || track->Pt() > 100) return kFALSE; //
c04c80e6 369
370 // eta
371 fQA->Fill("h_ST_eta", track->Eta());
372 //if(TMath::Abs(track->Eta()) > 0.9) return kFALSE;
373
374 return kTRUE;
375}
376//________________________________________________________________
377Bool_t AliHFEV0cuts::V0CutsCommon(AliESDv0 *v0){
378 //
379 // V0 cuts common to all V0s
380 //
3a72645a 381
c04c80e6 382 AliESDtrack* dN, *dP;
383
384 dP = dynamic_cast<AliESDtrack *>(fInputEvent->GetTrack(v0->GetPindex()));
385 dN = dynamic_cast<AliESDtrack *>(fInputEvent->GetTrack(v0->GetNindex()));
386
387 if(!dN || !dP) return kFALSE;
388
389 Int_t qP = dP->Charge();
390 Int_t qN = dN->Charge();
391
392 if((qP*qN) != -1) return kFALSE;
393
394 return kTRUE;
395}
396//________________________________________________________________
397Bool_t AliHFEV0cuts::GammaCuts(AliESDv0 *v0){
398 //
399 // gamma cuts
400 //
401
402 if(!v0) return kFALSE;
403
3a72645a 404 if(fMCEvent){
405 if(1 == fCurrentV0id){
406 fQAmc->Fill("h_Mass_gamma_as_K0", v0->GetEffMass(2, 2));
407 fQAmc->Fill("h_Mass_gamma_as_L", v0->GetEffMass(2, 4));
408 fQAmc->Fill("h_Mass_gamma_as_L", v0->GetEffMass(4, 2));
409 }
410 }
411
c04c80e6 412 // loose cuts first
3a72645a 413 //if(LooseRejectK0(v0) || LooseRejectLambda(v0)) return kFALSE;
c04c80e6 414
415 AliVTrack* daughter[2];
416 Int_t pIndex = 0, nIndex = 0;
417 if(CheckSigns(v0)){
418 pIndex = v0->GetPindex();
419 nIndex = v0->GetNindex();
420 }
421 else{
422 pIndex = v0->GetNindex();
423 nIndex = v0->GetPindex();
424 }
425 daughter[0] = dynamic_cast<AliVTrack *>(fInputEvent->GetTrack(pIndex));
426 daughter[1] = dynamic_cast<AliVTrack *>(fInputEvent->GetTrack(nIndex));
427 if(!daughter[0] || !daughter[1]) return kFALSE;
428
429 AliKFParticle *kfMother = CreateMotherParticle(daughter[0], daughter[1], TMath::Abs(kElectron), TMath::Abs(kElectron));
430 if(!kfMother) return kFALSE;
431
432 // production vertex is set in the 'CreateMotherParticle' function
3a72645a 433 //kfMother->SetMassConstraint(0, 0.001);
c04c80e6 434
435 AliESDtrack* d[2];
436 d[0] = dynamic_cast<AliESDtrack*>(fInputEvent->GetTrack(pIndex));
437 d[1] = dynamic_cast<AliESDtrack*>(fInputEvent->GetTrack(nIndex));
438
439 Float_t iMass = v0->GetEffMass(0, 0);
440 Float_t iP = v0->P();
441 Float_t p[2] = {d[0]->GetP(), d[1]->GetP()};
442
c04c80e6 443 // Cut values
c2690925 444 const Double_t cutChi2NDF = 1.5; // ORG [7.]
445 const Double_t cutCosPoint[2] = {0., 0.007}; // ORG [0., 0.02]
c04c80e6 446 const Double_t cutDCA[2] = {0., 0.25}; // ORG [0., 0.25]
c2690925 447 const Double_t cutProdVtxR[2] = {6., 90.}; // ORG [3., 90]
c04c80e6 448 const Double_t cutPsiPair[2] = {0., 0.05}; // ORG [0. 0.05]
3a72645a 449 // mass cut
c04c80e6 450 const Double_t cutMass = 0.05; // ORG [0.05]
e97c2edf 451
452 //
453 // possible new cuts
454 //
455 // separation cut at the entrance to the TPC
456 const Double_t cutSeparation = 0.; // ORG 3.0 cm
457
458
459
c04c80e6 460 // Values
461
462 // cos pointing angle
463 Double_t cosPoint = v0->GetV0CosineOfPointingAngle();
464 cosPoint = TMath::ACos(cosPoint);
465
466 // DCA between daughters
467 Double_t dca = v0->GetDcaV0Daughters();
468
469 // Production vertex
470 Double_t x, y, z;
471 v0->GetXYZ(x,y,z);
472 Double_t r = TMath::Sqrt(x*x + y*y);
473
3a72645a 474 Double_t xy[2];
475 Double_t r2 = -1.;
476 if ( GetConvPosXY(d[0], d[1], xy) ){
477 r2 = TMath::Sqrt(xy[0]*xy[0] + xy[1]*xy[1]);
478 }
479
c04c80e6 480 // psi pair
481 Double_t psiPair = PsiPair(v0);
482
483 // V0 chi2/ndf
484 Double_t chi2ndf = kfMother->GetChi2()/kfMother->GetNDF();
c04c80e6 485 if(kfMother) delete kfMother;
e97c2edf 486
487 // Separation
488 AliExternalTrackParam const *param[2];
489 param[0] = d[0]->GetInnerParam();
490 param[1] = d[1]->GetInnerParam();
491 Double_t sep = 999.;
492 if(param[0] && param[1]){
493 TVector3 xyz[3];
494 xyz[0].SetXYZ(param[0]->GetX(), param[0]->GetY(), param[0]->GetZ());
495 xyz[1].SetXYZ(param[1]->GetX(), param[1]->GetY(), param[1]->GetZ());
496 xyz[2] = xyz[0] - xyz[1];
497 sep = xyz[2].Mag();
498 }
499
500
c04c80e6 501
502 //
503 // Apply the cuts, produce QA plots (with mass cut)
504 //
505 fQA->Fill("h_Gamma_Mass", 0, iMass);
3a72645a 506
507 // MC
508 if(fMCEvent){
509 if(1 == fCurrentV0id){
510 fQAmc->Fill("h_Gamma_Mass_S", 0, iMass);
511 fQAmc->Fill("h_gamma_MvP_S", iP, iMass);
512 }
513 else if(-2 != fCurrentV0id) fQAmc->Fill("h_Gamma_Mass_B", 0, iMass);
514 }
515 // cut distributions
c04c80e6 516 if(iMass < cutMass){
c04c80e6 517 fQA->Fill("h_Electron_P", 0, p[0]);
518 fQA->Fill("h_Electron_P", 0, p[1]);
519 fQA->Fill("h_cut_Gamma_CosPoint", 0, cosPoint);
c04c80e6 520 fQA->Fill("h_cut_Gamma_DCA", 0, dca);
3a72645a 521 fQA->Fill("h_cut_Gamma_VtxR_old", 0, r);
522 fQA->Fill("h_cut_Gamma_VtxR", 0, r2);
c04c80e6 523 fQA->Fill("h_cut_Gamma_PP", 0, psiPair);
524 fQA->Fill("h_cut_Gamma_Chi2", 0, chi2ndf);
3a72645a 525 fQA->Fill("h_cut_Gamma_Chi2", 1, chi2ndf, iP);
e97c2edf 526 fQA->Fill("h_cut_Gamma_Sep", 0, iP, sep);
527
3a72645a 528
529 if(fMCEvent){
530 // MC signal
531 if(1 == fCurrentV0id){
532 fQAmc->Fill("h_cut_Gamma_CosPoint_S", 0, iP, cosPoint);
533 fQAmc->Fill("h_cut_Gamma_DCA_S", 0, iP, dca);
534 fQAmc->Fill("h_cut_Gamma_VtxR_S", 0, iP, r2);
3a72645a 535 fQAmc->Fill("h_cut_Gamma_PP_S", 0, iP, psiPair);
536 fQAmc->Fill("h_cut_Gamma_Chi2_S", 0, iP, chi2ndf);
537 fQAmc->Fill("h_cut_Gamma_Chi2_S", 1, iP, chi2ndf);
e97c2edf 538 fQAmc->Fill("h_cut_Gamma_Sep_S", 0, iP, sep);
c2690925 539 fQAmc->Fill("h_cut_Gamma_SepR_S", 0,r2, sep);
3a72645a 540 fQAmc->Fill("h_Electron_P_S", 0, p[0]);
541 fQAmc->Fill("h_Electron_P_S", 0, p[1]);
542 }
543 // MC background
544 else if(-2 != fCurrentV0id){
545 fQAmc->Fill("h_cut_Gamma_CosPoint_B", 0, iP, cosPoint);
546 fQAmc->Fill("h_cut_Gamma_DCA_B", 0, iP, dca);
547 fQAmc->Fill("h_cut_Gamma_VtxR_B", 0, iP, r2);
3a72645a 548 fQAmc->Fill("h_cut_Gamma_PP_B", 0, iP, psiPair);
549 fQAmc->Fill("h_cut_Gamma_Chi2_B", 0, iP, chi2ndf);
550 fQAmc->Fill("h_cut_Gamma_Chi2_B", 1, iP, chi2ndf);
e97c2edf 551 fQAmc->Fill("h_cut_Gamma_Sep_B", 0, iP, sep);
c2690925 552 fQAmc->Fill("h_cut_Gamma_SepR_B", 0,r2, sep);
3a72645a 553 fQAmc->Fill("h_Electron_P_B", 0, p[0]);
554 fQAmc->Fill("h_Electron_P_B", 0, p[1]);
555 }
556 }
557 }
c04c80e6 558
3a72645a 559
560 //
561 // Chi2/NDF cut
562 //
563 if(chi2ndf > cutChi2NDF) return kFALSE;
c04c80e6 564 fQA->Fill("h_Gamma_Mass", 1, iMass);
565 if(iMass < cutMass){
3a72645a 566 fQA->Fill("h_cut_Gamma_CosPoint", 1, cosPoint);
c04c80e6 567 fQA->Fill("h_Electron_P", 1, p[0]);
568 fQA->Fill("h_Electron_P", 1, p[1]);
c04c80e6 569 }
3a72645a 570 if(fMCEvent){
571 if(1 == fCurrentV0id) fQAmc->Fill("h_Gamma_Mass_S", 1, iMass);
572 else if(-2 != fCurrentV0id) fQAmc->Fill("h_Gamma_Mass_B", 1, iMass);
573 if(iMass < cutMass){
574 if(1 == fCurrentV0id){
575 fQAmc->Fill("h_cut_Gamma_CosPoint_S", 1, iP, cosPoint);
576 fQAmc->Fill("h_Electron_P_S", 1, p[0]);
577 fQAmc->Fill("h_Electron_P_S", 1, p[1]);
578 }
579 else if(-2 != fCurrentV0id){
580 fQAmc->Fill("h_cut_Gamma_CosPoint_B", 1, iP, cosPoint);
581 fQAmc->Fill("h_Electron_P_B", 1, p[0]);
582 fQAmc->Fill("h_Electron_P_B", 1, p[1]);
583 }
584 }
585 }
586
587 //
588 // Cos point cut
589 //
590 if(cosPoint < cutCosPoint[0] || cosPoint > cutCosPoint[1]) return kFALSE;
c04c80e6 591 fQA->Fill("h_Gamma_Mass", 2, iMass);
592 if(iMass < cutMass){
593 fQA->Fill("h_Electron_P", 2, p[0]);
594 fQA->Fill("h_Electron_P", 2, p[1]);
3a72645a 595 fQA->Fill("h_cut_Gamma_DCA", 1, dca);
c04c80e6 596 }
3a72645a 597 if(fMCEvent){
598 if(1 == fCurrentV0id) fQAmc->Fill("h_Gamma_Mass_S", 2, iMass);
599 else if(-2 != fCurrentV0id) fQAmc->Fill("h_Gamma_Mass_B", 2, iMass);
600 if(iMass < cutMass){
601 if(1 == fCurrentV0id){
602 fQAmc->Fill("h_cut_Gamma_DCA_S", 1, iP, dca);
603 fQAmc->Fill("h_Electron_P_S", 2, p[0]);
604 fQAmc->Fill("h_Electron_P_S", 2, p[1]);
605
606 }
607 else if(-2 != fCurrentV0id){
608 fQAmc->Fill("h_cut_Gamma_DCA_B", 1, iP, dca);
609 fQAmc->Fill("h_Electron_P_B", 2, p[0]);
610 fQAmc->Fill("h_Electron_P_B", 2, p[1]);
611
612 }
613 }
614 }
615
616 //
617 // DCA cut
618 //
619 if(dca < cutDCA[0] || dca > cutDCA[1]) return kFALSE;
c04c80e6 620 fQA->Fill("h_Gamma_Mass", 3, iMass);
621 if(iMass < cutMass){
622 fQA->Fill("h_Electron_P", 3, p[0]);
623 fQA->Fill("h_Electron_P", 3, p[1]);
3a72645a 624 fQA->Fill("h_cut_Gamma_VtxR_old", 1, r);
625 fQA->Fill("h_cut_Gamma_VtxR", 1, r2);
626 }
627 if(fMCEvent){
628 if(1 == fCurrentV0id) fQAmc->Fill("h_Gamma_Mass_S", 3, iMass);
629 else if(-2 != fCurrentV0id) fQAmc->Fill("h_Gamma_Mass_B", 3, iMass);
630 if(iMass < cutMass){
631 if(1 == fCurrentV0id){
632 fQAmc->Fill("h_cut_Gamma_VtxR_S", 1, iP, r2);
633 fQAmc->Fill("h_Electron_P_S", 3, p[0]);
634 fQAmc->Fill("h_Electron_P_S", 3, p[1]);
635
636 }
637 else if(-2 != fCurrentV0id){
638 fQAmc->Fill("h_cut_Gamma_VtxR_B", 1, iP, r2);
639 fQAmc->Fill("h_Electron_P_B", 3, p[0]);
640 fQAmc->Fill("h_Electron_P_B", 3, p[1]);
641 }
642 }
c04c80e6 643 }
644
3a72645a 645 //
646 // Vertex radius cut
647 //
648 if(r < cutProdVtxR[0] || r > cutProdVtxR[1]) return kFALSE;
c04c80e6 649 fQA->Fill("h_Gamma_Mass", 4, iMass);
650 if(iMass < cutMass){
3a72645a 651 fQA->Fill("h_cut_Gamma_PP", 1, psiPair);
c04c80e6 652 fQA->Fill("h_Electron_P", 4, p[0]);
653 fQA->Fill("h_Electron_P", 4, p[1]);
3a72645a 654 }
655 if(fMCEvent){
656 if(1 == fCurrentV0id) fQAmc->Fill("h_Gamma_Mass_S", 4, iMass);
657 else if(-2 != fCurrentV0id) fQAmc->Fill("h_Gamma_Mass_B", 4, iMass);
658 if(iMass < cutMass){
659 if(1 == fCurrentV0id){
660 fQAmc->Fill("h_cut_Gamma_PP_S", 1, iP, psiPair);
661 fQAmc->Fill("h_Electron_P_S", 4, p[0]);
662 fQAmc->Fill("h_Electron_P_S", 4, p[1]);
663 }
664 else if(-2 != fCurrentV0id){
665 fQAmc->Fill("h_cut_Gamma_PP_B", 1, iP, psiPair);
666 fQAmc->Fill("h_Electron_P_B", 4, p[0]);
667 fQAmc->Fill("h_Electron_P_B", 4, p[1]);
668 }
669 }
c04c80e6 670 }
671
3a72645a 672
673 //
674 // PsiPair cut
675 //
c04c80e6 676 if(psiPair < cutPsiPair[0] || psiPair > cutPsiPair[1]) return kFALSE;
677 fQA->Fill("h_Gamma_Mass", 5, iMass);
678 if(iMass < cutMass){
e97c2edf 679 fQA->Fill("h_cut_Gamma_Sep", 1, iP, sep);
c04c80e6 680 fQA->Fill("h_Electron_P", 5, p[0]);
681 fQA->Fill("h_Electron_P", 5, p[1]);
3a72645a 682 }
683 if(fMCEvent){
684 if(1 == fCurrentV0id) fQAmc->Fill("h_Gamma_Mass_S", 5, iMass);
685 else if(-2 != fCurrentV0id)fQAmc->Fill("h_Gamma_Mass_B", 5, iMass);
686
687 if(iMass < cutMass){
688 if(1 == fCurrentV0id){
e97c2edf 689 fQAmc->Fill("h_cut_Gamma_Sep_S", 1, iP, sep);
c2690925 690 fQAmc->Fill("h_cut_Gamma_SepR_S", 1,r2, sep);
3a72645a 691 fQAmc->Fill("h_Electron_P_S", 5, p[0]);
692 fQAmc->Fill("h_Electron_P_S", 5, p[1]);
693 }
694 else if(-2 != fCurrentV0id){
e97c2edf 695 fQAmc->Fill("h_cut_Gamma_Sep_B", 1, iP, sep);
c2690925 696 fQAmc->Fill("h_cut_Gamma_SepR_B", 1,r2, sep);
3a72645a 697 fQAmc->Fill("h_Electron_P_B", 5, p[0]);
698 fQAmc->Fill("h_Electron_P_B", 5, p[1]);
699 }
700 }
c04c80e6 701 }
702
e97c2edf 703
704 // TESTING NEW CUT
3a72645a 705 //
e97c2edf 706 // distance of the tracks at the entrance of the TPC
3a72645a 707 //
e97c2edf 708 if(sep < cutSeparation) return kFALSE;
c04c80e6 709 fQA->Fill("h_Gamma_Mass", 6, iMass);
710 if(iMass < cutMass){
711 fQA->Fill("h_Electron_P", 6, p[0]);
712 fQA->Fill("h_Electron_P", 6, p[1]);
c04c80e6 713 }
3a72645a 714 if(fMCEvent){
715 if(1 == fCurrentV0id) fQAmc->Fill("h_Gamma_Mass_S", 6, iMass);
e97c2edf 716 else if(-2 != fCurrentV0id)fQAmc->Fill("h_Gamma_Mass_B", 6, iMass);
717
3a72645a 718 if(iMass < cutMass){
719 if(1 == fCurrentV0id){
720 fQAmc->Fill("h_Electron_P_S", 6, p[0]);
721 fQAmc->Fill("h_Electron_P_S", 6, p[1]);
722 }
723 else if(-2 != fCurrentV0id){
724 fQAmc->Fill("h_Electron_P_B", 6, p[0]);
725 fQAmc->Fill("h_Electron_P_B", 6, p[1]);
726 }
727 }
c04c80e6 728 }
729
e97c2edf 730 // .. test
731
c04c80e6 732
733 if(iMass > cutMass) return kFALSE;
734
735 // all cuts passed
3a72645a 736
737
738 // some MC stuff
739 //printf("**D: gamma V0id: %i, P: %i, N: %i \n", fCurrentV0id, fPdaughterPDG, fNdaughterPDG);
740 if(1 == fCurrentV0id){
741 fQAmc->Fill("h_gamma_p_S", iP);
742 fQAmc->Fill("h_Electron_P_S", 7, p[0]);
743 fQAmc->Fill("h_Electron_P_S", 7, p[1]);
744 }
745 else if (-2 != fCurrentV0id){
746 fQAmc->Fill("h_gamma_p_B", iP);
747 fQAmc->Fill("h_Electron_P_B", 7, p[0]);
748 fQAmc->Fill("h_Electron_P_B", 7, p[1]);
749 }
750
751
c04c80e6 752 return kTRUE;
753}
754//________________________________________________________________
755Bool_t AliHFEV0cuts::K0Cuts(AliESDv0 *v0){
756 //
757 // K0 cuts
758 //
759
760 if(!v0) return kFALSE;
761
3a72645a 762 if(fMCEvent){
763 if(2 == fCurrentV0id){
764 fQAmc->Fill("h_Mass_K0_as_G", v0->GetEffMass(0, 0));
765 fQAmc->Fill("h_Mass_K0_as_L", v0->GetEffMass(2, 4));
766 fQAmc->Fill("h_Mass_K0_as_L", v0->GetEffMass(4, 2));
767 }
768 }
769
770 //const Double_t cK0mass=TDatabasePDG::Instance()->GetParticle(kK0Short)->Mass(); // PDG K0s mass
c04c80e6 771 AliVTrack* daughter[2];
772 Int_t pIndex = 0, nIndex = 0;
773 if(CheckSigns(v0)){
774 pIndex = v0->GetPindex();
775 nIndex = v0->GetNindex();
776 }
777 else{
778 pIndex = v0->GetNindex();
779 nIndex = v0->GetPindex();
780 }
781
782 daughter[0] = dynamic_cast<AliVTrack *>(fInputEvent->GetTrack(pIndex));
783 daughter[1] = dynamic_cast<AliVTrack *>(fInputEvent->GetTrack(nIndex));
784 if(!daughter[0] || !daughter[1]) return kFALSE;
785
786 AliKFParticle *kfMother = CreateMotherParticle(daughter[0], daughter[1], TMath::Abs(kPiPlus), TMath::Abs(kPiPlus));
787 if(!kfMother) return kFALSE;
788 // production vertex is set in the 'CreateMotherParticle' function
3a72645a 789 //kfMother->SetMassConstraint(cK0mass, 0.);
c04c80e6 790
791 AliESDtrack* d[2];
792 d[0] = dynamic_cast<AliESDtrack*>(fInputEvent->GetTrack(pIndex));
793 d[1] = dynamic_cast<AliESDtrack*>(fInputEvent->GetTrack(nIndex));
794
795 Float_t iMass = v0->GetEffMass(2, 2);
796 Float_t iP = v0->P();
797 Float_t p[2] = {d[0]->GetP(), d[1]->GetP()};
798 Double_t theta = v0->Theta();
799 Double_t phi = v0->Phi();
800 Double_t pt = v0->Pt();
801 Double_t data[4] = {0., 0., 0., 0.};
3a72645a 802
c04c80e6 803 // Cut values
c2690925 804 const Double_t cutChi2NDF = 2.; // ORG [7.]
3a72645a 805 const Double_t cutCosPoint[2] = {0., 0.02}; // ORG [0., 0.03]
c04c80e6 806 const Double_t cutDCA[2] = {0., 0.2}; // ORG [0., 0.1]
807 const Double_t cutProdVtxR[2] = {2.0, 30.}; // ORG [0., 8.1]
e97c2edf 808 const Double_t cutMass[2] = {0.486, 0.508}; // ORG [0.485, 0.51]
c04c80e6 809 // Values
810
811 // cos pointing angle
812 Double_t cosPoint = v0->GetV0CosineOfPointingAngle();
813 cosPoint = TMath::ACos(cosPoint);
814
815 // DCA between daughters
816 Double_t dca = v0->GetDcaV0Daughters();
817
818 // Production vertex
819 Double_t x, y, z;
820 v0->GetXYZ(x,y,z);
821
822 Double_t r = TMath::Sqrt(x*x + y*y);
823
824 // V0 chi2/ndf
825 Double_t chi2ndf = kfMother->GetChi2()/kfMother->GetNDF();
826
827 if(kfMother) delete kfMother;
828
c04c80e6 829 //
830 // Apply the cuts, produce QA plots (with mass cut)
831 //
832
833 fQA->Fill("h_K0_Mass", 0, iMass);
3a72645a 834 // MC
835 if(fMCEvent){
836 if(2 == fCurrentV0id){
837 fQAmc->Fill("h_K0_Mass_S", 0, iMass);
838 fQAmc->Fill("h_K0_MvP_S", iP, iMass);
839 }
840 else if(-2 != fCurrentV0id) fQAmc->Fill("h_K0_Mass_B", 0, iMass);
841 }
842
c04c80e6 843 if(iMass > cutMass[0] && iMass < cutMass[1]){
c04c80e6 844 fQA->Fill("h_PionK0_P", 0, p[0]);
845 fQA->Fill("h_PionK0_P", 0, p[1]);
846 fQA->Fill("h_cut_K0_CosPoint", 0, cosPoint);
c04c80e6 847 fQA->Fill("h_cut_K0_DCA", 0, dca);
848 fQA->Fill("h_cut_K0_VtxR", 0, r);
849 fQA->Fill("h_cut_K0_Chi2", 0, chi2ndf);
3a72645a 850 fQA->Fill("h_cut_K0_Chi2", 1, chi2ndf);
851 }
852
853 // MC
854 if(fMCEvent){
855 if(iMass > cutMass[0] && iMass < cutMass[1]){
856 if(2 == fCurrentV0id){
857 fQAmc->Fill("h_cut_K0_CosPoint_S", 0, iP, cosPoint);
858 fQAmc->Fill("h_cut_K0_DCA_S", 0, iP, dca);
859 fQAmc->Fill("h_cut_K0_VtxR_S", 0, iP, r);
860 fQAmc->Fill("h_cut_K0_Chi2_S", 0, iP, chi2ndf);
861 fQAmc->Fill("h_cut_K0_Chi2_S", 1, iP, chi2ndf);
3a72645a 862 fQAmc->Fill("h_PionK0_P_S", 0, p[0]);
863 fQAmc->Fill("h_PionK0_P_S", 0, p[1]);
864 }
865 else if(-2 != fCurrentV0id){
866 fQAmc->Fill("h_cut_K0_CosPoint_B", 0, iP, cosPoint);
867 fQAmc->Fill("h_cut_K0_DCA_B", 0, iP, dca);
868 fQAmc->Fill("h_cut_K0_VtxR_B", 0, iP, r);
869 fQAmc->Fill("h_cut_K0_Chi2_B", 0, iP, chi2ndf);
870 fQAmc->Fill("h_cut_K0_Chi2_B", 1, iP, chi2ndf);
3a72645a 871 fQAmc->Fill("h_PionK0_P_B", 0, p[0]);
872 fQAmc->Fill("h_PionK0_P_B", 0, p[1]);
873 }
874 }
c04c80e6 875 }
876
3a72645a 877 //
878 // Chi2/NDF cut
879 //
880 if(chi2ndf > cutChi2NDF) return kFALSE;
c04c80e6 881 fQA->Fill("h_K0_Mass", 1, iMass);
882 if(iMass > cutMass[0] && iMass < cutMass[1]){
3a72645a 883 fQA->Fill("h_cut_K0_CosPoint", 1, cosPoint);
c04c80e6 884 fQA->Fill("h_PionK0_P", 1, p[0]);
885 fQA->Fill("h_PionK0_P", 1, p[1]);
3a72645a 886 }
887 if(fMCEvent){
888 if(2 == fCurrentV0id) fQAmc->Fill("h_K0_Mass_S", 1, iMass);
889 else if(-2 != fCurrentV0id) fQAmc->Fill("h_K0_Mass_B", 1, iMass);
890 if(iMass > cutMass[0] && iMass < cutMass[1]){
891 if(2 == fCurrentV0id){
892 fQAmc->Fill("h_cut_K0_CosPoint_S", 1, iP, cosPoint);
893 fQAmc->Fill("h_PionK0_P_S", 1, p[0]);
894 fQAmc->Fill("h_PionK0_P_S", 1, p[1]);
895 }
896 else if(-2 != fCurrentV0id){
897 fQAmc->Fill("h_cut_K0_CosPoint_B", 1, iP, cosPoint);
898 fQAmc->Fill("h_PionK0_P_B", 1, p[0]);
899 fQAmc->Fill("h_PionK0_P_B", 1, p[1]);
900 }
901 }
c04c80e6 902 }
3a72645a 903
904 //
905 // Cos point cut
906 //
907 if(cosPoint < cutCosPoint[0] || cosPoint > cutCosPoint[1]) return kFALSE;
c04c80e6 908 fQA->Fill("h_K0_Mass", 2, iMass);
909 if(iMass > cutMass[0] && iMass < cutMass[1]){
910 fQA->Fill("h_PionK0_P", 2, p[0]);
911 fQA->Fill("h_PionK0_P", 2, p[1]);
3a72645a 912 fQA->Fill("h_cut_K0_DCA", 1, dca);
913 }
914 if(fMCEvent){
915 if(2 == fCurrentV0id) fQAmc->Fill("h_K0_Mass_S", 2, iMass);
916 else if(-2 != fCurrentV0id) fQAmc->Fill("h_K0_Mass_B", 2, iMass);
917 if(iMass > cutMass[0] && iMass < cutMass[1]){
918 if(2 == fCurrentV0id){
919 fQAmc->Fill("h_cut_K0_DCA_S", 1, iP, dca);
920 fQAmc->Fill("h_PionK0_P_S", 2, p[0]);
921 fQAmc->Fill("h_PionK0_P_S", 2, p[1]);
922 }
923 else if(-2 != fCurrentV0id){
924 fQAmc->Fill("h_cut_K0_DCA_B", 1, iP, dca);
925 fQAmc->Fill("h_PionK0_P_B", 2, p[0]);
926 fQAmc->Fill("h_PionK0_P_B", 2, p[1]);
927 }
928 }
c04c80e6 929 }
c04c80e6 930
3a72645a 931
932 //
933 // DCA cut
934 //
935 if(dca < cutDCA[0] || dca > cutDCA[1]) return kFALSE;
c04c80e6 936 fQA->Fill("h_K0_Mass", 3, iMass);
937 if(iMass > cutMass[0] && iMass < cutMass[1]){
938 fQA->Fill("h_PionK0_P", 3, p[0]);
939 fQA->Fill("h_PionK0_P", 3, p[1]);
3a72645a 940 fQA->Fill("h_cut_K0_VtxR", 1, r);
941 }
942 if(fMCEvent){
943 if(2 == fCurrentV0id) fQAmc->Fill("h_K0_Mass_S", 3, iMass);
944 else if(-2 != fCurrentV0id) fQAmc->Fill("h_K0_Mass_B", 3, iMass);
945 if(iMass > cutMass[0] && iMass < cutMass[1]){
946 if(2 == fCurrentV0id){
947 fQAmc->Fill("h_cut_K0_VtxR_S", 1, iP, r);
948 fQAmc->Fill("h_PionK0_P_S", 3, p[0]);
949 fQAmc->Fill("h_PionK0_P_S", 3, p[1]);
950 }
951 else if(-2 != fCurrentV0id){
952 fQAmc->Fill("h_cut_K0_VtxR_B", 1, iP, r);
953 fQAmc->Fill("h_PionK0_P_B", 3, p[0]);
954 fQAmc->Fill("h_PionK0_P_B", 3, p[1]);
955 }
956 }
c04c80e6 957 }
958
3a72645a 959
960 //
961 // Vertex R cut
962 //
963 if(r < cutProdVtxR[0] || r > cutProdVtxR[1]) return kFALSE;
c04c80e6 964 fQA->Fill("h_K0_Mass", 4, iMass);
965 if(iMass > cutMass[0] && iMass < cutMass[1]){
966 fQA->Fill("h_PionK0_P", 4, p[0]);
967 fQA->Fill("h_PionK0_P", 4, p[1]);
c04c80e6 968 }
3a72645a 969 if(fMCEvent){
970 if(2 == fCurrentV0id) fQAmc->Fill("h_K0_Mass_S", 4, iMass);
971 else if(-2 != fCurrentV0id) fQAmc->Fill("h_K0_Mass_B", 4, iMass);
972 if(iMass > cutMass[0] && iMass < cutMass[1]){
973 if(2 == fCurrentV0id){
3a72645a 974 fQAmc->Fill("h_PionK0_P_S", 4, p[0]);
975 fQAmc->Fill("h_PionK0_P_S", 4, p[1]);
976 }
977 else if(-2 != fCurrentV0id){
3a72645a 978 fQAmc->Fill("h_PionK0_P_B", 4, p[0]);
979 fQAmc->Fill("h_PionK0_P_B", 4, p[1]);
980 }
981 }
c04c80e6 982 }
983
984 data[0] = iMass;
985 data[1] = pt;
986 data[2] = theta;
987 data[3] = phi;
988 //printf("-D: m: %f, pT: %f, theta: %f, phi: %f\n", invMass, mPt, theta, phi);
989 fQA->Fill("hK0", data);
990
991
992 if(iMass < cutMass[0] || iMass > cutMass[1]) return kFALSE;
993
994 // all cuts passed
995
3a72645a 996 // some MC stuff
997 if(2 == fCurrentV0id){
998 fQAmc->Fill("h_K0_p_S", iP);
999 fQAmc->Fill("h_PionK0_P_S", 5, p[0]);
1000 fQAmc->Fill("h_PionK0_P_S", 5, p[1]);
1001 }
1002 else if (-2 != fCurrentV0id){
1003 fQAmc->Fill("h_K0_p_B", iP);
1004 fQAmc->Fill("h_PionK0_P_B", 5, p[0]);
1005 fQAmc->Fill("h_PionK0_P_B", 5, p[1]);
1006 }
1007
c04c80e6 1008 return kTRUE;
1009}
1010//________________________________________________________________
1011Bool_t AliHFEV0cuts::LambdaCuts(AliESDv0 *v0, Bool_t &isLambda ){
1012 //
1013 // Lambda cuts - decision on Lambda - AntiLambda is taken too
1014 //
1015 // discrimination between lambda and antilambda - correlation of the following variables necessary:
1016 // - momentum of the proton AND momentum of the pion (proton momentum is allways larger)
1017 // - mass of the mother particle
1018
1019 if(!v0) return kFALSE;
1020
3a72645a 1021 if(fMCEvent){
1022 if(4 == fCurrentV0id){
1023 fQAmc->Fill("h_Mass_L_as_G", v0->GetEffMass(0, 0));
1024 fQAmc->Fill("h_Mass_L_as_K0", v0->GetEffMass(2, 0));
1025 }
1026 }
c04c80e6 1027 // loose cuts first
3a72645a 1028 //if(LooseRejectK0(v0) || LooseRejectGamma(v0)) return kFALSE;
c04c80e6 1029
1030 const Double_t cL0mass=TDatabasePDG::Instance()->GetParticle(kLambda0)->Mass(); // PDG lambda mass
1031
1032 AliVTrack* daughter[2];
1033 Int_t pIndex = 0, nIndex = 0;
1034 Float_t mMass[2] = {-1., -1.};
1035 if(CheckSigns(v0)){
1036 pIndex = v0->GetPindex();
1037 nIndex = v0->GetNindex();
1038 mMass[0] = v0->GetEffMass(4, 2);
1039 mMass[1] = v0->GetEffMass(2, 4);
1040 }
1041 else{
1042 pIndex = v0->GetNindex();
1043 nIndex = v0->GetPindex();
1044 mMass[0] = v0->GetEffMass(2, 4);
1045 mMass[1] = v0->GetEffMass(4, 2);
1046 }
1047
1048 daughter[0] = dynamic_cast<AliVTrack *>(fInputEvent->GetTrack(pIndex));
1049 daughter[1] = dynamic_cast<AliVTrack *>(fInputEvent->GetTrack(nIndex));
1050 if(!daughter[0] || !daughter[1]) return kFALSE;
1051
1052 AliKFParticle *kfMother[2] = {0x0, 0x0};
1053 // Lambda
1054 kfMother[0] = CreateMotherParticle(daughter[0], daughter[1], TMath::Abs(kProton), TMath::Abs(kPiPlus));
1055 if(!kfMother[0]) return kFALSE;
1056
1057 // production vertex is set in the 'CreateMotherParticle' function
3a72645a 1058 //kfMother[0]->SetMassConstraint(cL0mass, 0.);
c04c80e6 1059
1060 // Anti Lambda
1061 kfMother[1] = CreateMotherParticle(daughter[0], daughter[1], TMath::Abs(kPiPlus), TMath::Abs(kProton));
1062 if(!kfMother[1]) return kFALSE;
1063 // production vertex is set in the 'CreateMotherParticle' function
3a72645a 1064 //kfMother[1]->SetMassConstraint(cL0mass, 0.);
c04c80e6 1065
1066 Float_t dMass[2] = {TMath::Abs(mMass[0] - cL0mass), TMath::Abs(mMass[1] - cL0mass)};
1067
1068 AliESDtrack* d[2];
1069 d[0] = dynamic_cast<AliESDtrack*>(fInputEvent->GetTrack(pIndex));
1070 d[1] = dynamic_cast<AliESDtrack*>(fInputEvent->GetTrack(nIndex));
1071 if(!d[0] || !d[1]) return kFALSE;
1072
1073 Float_t p[2] = {d[0]->GetP(), d[1]->GetP()};
1074
1075 // check the 3 lambda - antilambda variables
1076 Int_t check[2] = {-1, -1}; // 0 : lambda, 1 : antilambda
1077 // 1) momentum of the daughter particles - proton is expected to have higher momentum than pion
1078 check[0] = (p[0] > p[1]) ? 0 : 1;
1079 // 2) mass of the mother particle
1080 check[1] = (dMass[0] < dMass[1]) ? 0 : 1;
1081 fQA->Fill("h_L_checks", check[0]*1.0, check[1]*1.0);
1082
1083 // if the two check do not agree
1084 if(check[0] != check[1]){
1085 if(kfMother[0]) delete kfMother[0];
1086 if(kfMother[1]) delete kfMother[1];
1087 return kFALSE;
1088 }
1089
1090 // now that the check[0] == check[1]
1091 const Int_t type = check[0];
1092
1093 Float_t iMass =0.;
1094 if(CheckSigns(v0)){
1095 iMass = (type == 0) ? v0->GetEffMass(4, 2) : v0->GetEffMass(2, 4);
1096 }
1097 else{
1098 iMass = (type == 0) ? v0->GetEffMass(2, 4) : v0->GetEffMass(4, 2);
1099 }
1100 Float_t iP = v0->P();
1101
1102 // Cuts
c2690925 1103 const Double_t cutChi2NDF = 2.; // ORG [5.]
1104 const Double_t cutCosPoint[2] = {0., 0.01}; // ORG [0., 0.02]
c04c80e6 1105 const Double_t cutDCA[2] = {0., 0.2}; // ORG [0., 0.2]
3a72645a 1106 const Double_t cutProdVtxR[2] = {2., 40.}; // ORG [0., 24.]
c04c80e6 1107 const Double_t cutMass[2] = {1.11, 1.12}; // ORG [1.11, 1.12]
c04c80e6 1108 // cundidate cuts
c04c80e6 1109 // relative daughter momentum versusu mother momentum
c04c80e6 1110
1111 // compute the cut values
1112
1113 // cos pointing angle
1114 Double_t cosPoint = v0->GetV0CosineOfPointingAngle();
1115 cosPoint = TMath::ACos(cosPoint);
1116
1117 // DCA between daughters
1118 Double_t dca = v0->GetDcaV0Daughters();
1119
1120 // Production vertex
1121 Double_t x, y, z;
1122 v0->GetXYZ(x,y,z);
1123 Double_t r = TMath::Sqrt(x*x + y*y);
1124
3a72645a 1125 // proton - pion indices
c04c80e6 1126 Int_t ix[2] = {0, 1};
1127 if(1 == type){
1128 ix[0] = 1;
1129 ix[1] = 0;
1130 }
3a72645a 1131
1132 // proton - pion indices - based on MC truth
1133 // for background use the reconstructed indices
1134 Int_t ixMC[2] = {-1, -1}; // {proton, pion}
1135 if(fMCEvent){
1136 if(4 == fCurrentV0id){
1137 ixMC[0] = 0;
1138 ixMC[1] = 1;
1139 }
1140 else if(-4 == fCurrentV0id){
1141 ixMC[0] = 1;
1142 ixMC[1] = 0;
1143 }
1144 else{
1145 ixMC[0] = ix[0];
1146 ixMC[1] = ix[1];
1147 }
1148 }
1149
c04c80e6 1150 // V0 chi2/ndf
1151 Double_t chi2ndf = kfMother[type]->GetChi2()/kfMother[type]->GetNDF();
1152
1153 if(kfMother[0]) delete kfMother[0];
1154 if(kfMother[1]) delete kfMother[1];
1155
c04c80e6 1156 // Relative daughter momentum
1157 Double_t rP = (0 == check[0]) ? p[1]/p[0] : p[0]/p[1];
1158
c04c80e6 1159
1160 //
1161 // Apply the cuts, produce QA plots (with mass cut)
1162 //
1163
1164 (type == 0) ? fQA->Fill("h_L_Mass", 0, iMass) : fQA->Fill("h_AL_Mass", 0, iMass);
1165
3a72645a 1166
1167
1168 // MC
1169 if(fMCEvent){
1170 if(4 == fCurrentV0id){
1171 fQAmc->Fill("h_L_Mass_S", 0, iMass);
1172 fQAmc->Fill("h_lambda_MvP_S", iP, iMass);
1173 }
1174 else if(-4 == fCurrentV0id){
1175 fQAmc->Fill("h_AL_Mass_S", 0, iMass);
1176 fQAmc->Fill("h_lambda_MvP_S", iP, iMass);
1177 }
1178 else if(-2 != fCurrentV0id) fQAmc->Fill("h_LAL_Mass_B", 0, iMass);
1179 }
1180
1181
c04c80e6 1182 if(iMass > cutMass[0] && iMass < cutMass[1]){
c04c80e6 1183 fQA->Fill("h_ProtonL_P", 0, p[ix[0]]);
1184 fQA->Fill("h_PionL_P", 0, p[ix[1]]);
1185 fQA->Fill("h_cut_L_Chi2", 0, chi2ndf);
3a72645a 1186 fQA->Fill("h_cut_L_Chi2", 1, chi2ndf);
c04c80e6 1187 fQA->Fill("h_cut_L_CosPoint", 0, cosPoint);
c04c80e6 1188 fQA->Fill("h_cut_L_DCA", 0, dca);
1189 fQA->Fill("h_cut_L_VtxR", 0, r);
c04c80e6 1190 fQA->Fill("h_cut_L_rdp_v_mp", 0, iP, rP);
c04c80e6 1191 }
3a72645a 1192 if(fMCEvent){
1193 if(iMass > cutMass[0] && iMass < cutMass[1]){
1194 if(4 == TMath::Abs(fCurrentV0id)){
1195 fQAmc->Fill("h_cut_L_Chi2_S", 0, iP, chi2ndf);
1196 fQAmc->Fill("h_cut_L_Chi2_S", 1, iP, chi2ndf);
1197 fQAmc->Fill("h_cut_L_CosPoint_S", 0, iP, cosPoint);
1198 fQAmc->Fill("h_cut_L_DCA_S", 0, iP, dca);
1199 fQAmc->Fill("h_cut_L_VtxR_S", 0, iP, r);
3a72645a 1200 fQAmc->Fill("h_cut_L_rdp_v_mp_S", 0, iP, rP);
1201 fQAmc->Fill("h_ProtonL_P_S", 0, p[ixMC[0]]);
1202 fQAmc->Fill("h_PionL_P_S", 0, p[ixMC[1]]);
1203 }
1204 else if(-2 != fCurrentV0id){
1205 fQAmc->Fill("h_cut_L_Chi2_B", 0, iP, chi2ndf);
1206 fQAmc->Fill("h_cut_L_Chi2_B", 1, iP, chi2ndf);
1207 fQAmc->Fill("h_cut_L_CosPoint_B", 0, iP, cosPoint);
1208 fQAmc->Fill("h_cut_L_DCA_B", 0, iP, dca);
1209 fQAmc->Fill("h_cut_L_VtxR_B", 0, iP, r);
3a72645a 1210 fQAmc->Fill("h_cut_L_rdp_v_mp_B", 0, iP, rP);
1211 fQAmc->Fill("h_ProtonL_P_B", 0, p[ixMC[0]]);
1212 fQAmc->Fill("h_PionL_P_B", 0, p[ixMC[1]]);
1213 }
1214 }
1215 }
1216 //
1217 // Chi2/NDF cut
1218 //
1219 if(chi2ndf > cutChi2NDF) return kFALSE;
c04c80e6 1220 (type == 0) ? fQA->Fill("h_L_Mass", 1, iMass) : fQA->Fill("h_AL_Mass", 1, iMass);
1221 if(iMass > cutMass[0] && iMass < cutMass[1]){
3a72645a 1222 fQA->Fill("h_cut_L_CosPoint", 1, cosPoint);
c04c80e6 1223 fQA->Fill("h_ProtonL_P", 1, p[ix[0]]);
1224 fQA->Fill("h_PionL_P", 1, p[ix[1]]);
c04c80e6 1225 }
3a72645a 1226 if(fMCEvent){
1227 if(4 == fCurrentV0id) fQAmc->Fill("h_L_Mass_S", 1, iMass);
1228 else if(-4 == fCurrentV0id) fQAmc->Fill("h_AL_Mass_S", 1, iMass);
1229 else if(-2 != fCurrentV0id) fQAmc->Fill("h_LAL_Mass_B", 1, iMass);
1230 if(iMass > cutMass[0] && iMass < cutMass[1]){
1231 if(4 == TMath::Abs(fCurrentV0id)){
1232 fQAmc->Fill("h_cut_L_CosPoint_S", 1, iP, cosPoint);
1233 fQAmc->Fill("h_ProtonL_P_S", 1, p[ixMC[0]]);
1234 fQAmc->Fill("h_PionL_P_S", 1, p[ixMC[1]]);
1235 }
1236 else if(-2 != fCurrentV0id){
1237 fQAmc->Fill("h_cut_L_CosPoint_B", 1, iP, cosPoint);
1238 fQAmc->Fill("h_ProtonL_P_B", 1, p[ixMC[0]]);
1239 fQAmc->Fill("h_PionL_P_B", 1, p[ixMC[1]]);
1240 }
1241 }
1242 }
1243
1244 //
1245 // Cos point cut
1246 //
1247 if(cosPoint < cutCosPoint[0] || cosPoint > cutCosPoint[1]) return kFALSE;
c04c80e6 1248 (type == 0) ? fQA->Fill("h_L_Mass", 2, iMass) : fQA->Fill("h_AL_Mass", 2, iMass);
1249 if(iMass > cutMass[0] && iMass < cutMass[1]){
1250 fQA->Fill("h_ProtonL_P", 2, p[ix[0]]);
1251 fQA->Fill("h_PionL_P", 2, p[ix[1]]);
3a72645a 1252 fQA->Fill("h_cut_L_DCA", 1, dca);
1253 }
1254 if(fMCEvent){
1255 if(4 == fCurrentV0id) fQAmc->Fill("h_L_Mass_S", 2, iMass);
1256 else if(-4 == fCurrentV0id) fQAmc->Fill("h_AL_Mass_S", 2, iMass);
1257 else if(-2 != fCurrentV0id) fQAmc->Fill("h_LAL_Mass_B", 2, iMass);
1258 if(iMass > cutMass[0] && iMass < cutMass[1]){
1259 if(4 == TMath::Abs(fCurrentV0id)){
1260 fQAmc->Fill("h_cut_L_DCA_S", 1, iP, dca);
1261 fQAmc->Fill("h_ProtonL_P_S", 2, p[ixMC[0]]);
1262 fQAmc->Fill("h_PionL_P_S", 2, p[ixMC[1]]);
1263 }
1264 else if(-2 != fCurrentV0id){
1265 fQAmc->Fill("h_cut_L_DCA_B", 1, iP, dca);
1266 fQAmc->Fill("h_ProtonL_P_B", 2, p[ixMC[0]]);
1267 fQAmc->Fill("h_PionL_P_B", 2, p[ixMC[1]]);
1268 }
1269 }
c04c80e6 1270 }
1271
3a72645a 1272 //
1273 // DCA cut
1274 //
1275 if(dca < cutDCA[0] || dca > cutDCA[1]) return kFALSE;
c04c80e6 1276 (type == 0) ? fQA->Fill("h_L_Mass", 3, iMass) : fQA->Fill("h_AL_Mass", 3, iMass);
1277 if(iMass > cutMass[0] && iMass < cutMass[1]){
1278 fQA->Fill("h_ProtonL_P", 3, p[ix[0]]);
1279 fQA->Fill("h_PionL_P", 3, p[ix[1]]);
3a72645a 1280 fQA->Fill("h_cut_L_VtxR", 1, r);
1281 }
1282 if(fMCEvent){
1283 if(4 == fCurrentV0id) fQAmc->Fill("h_L_Mass_S", 3, iMass);
1284 else if(-4 == fCurrentV0id) fQAmc->Fill("h_AL_Mass_S", 3, iMass);
1285 else if(-2 != fCurrentV0id) fQAmc->Fill("h_LAL_Mass_B", 3, iMass);
1286 if(iMass > cutMass[0] && iMass < cutMass[1]){
1287 if(4 == TMath::Abs(fCurrentV0id)){
1288 fQAmc->Fill("h_cut_L_VtxR_S", 1, iP, r);
1289 fQAmc->Fill("h_ProtonL_P_S", 3, p[ixMC[0]]);
1290 fQAmc->Fill("h_PionL_P_S", 3, p[ixMC[1]]);
1291 }
1292 else if(-2 != fCurrentV0id){
1293 fQAmc->Fill("h_cut_L_VtxR_B", 1, iP, r);
1294 fQAmc->Fill("h_ProtonL_P_B", 3, p[ixMC[0]]);
1295 fQAmc->Fill("h_PionL_P_B", 3, p[ixMC[1]]);
1296 }
1297 }
c04c80e6 1298 }
1299
3a72645a 1300 //
1301 // Vertex radius cut
1302 //
1303 if(r < cutProdVtxR[0] || r > cutProdVtxR[1]) return kFALSE;
c04c80e6 1304 (type == 0) ? fQA->Fill("h_L_Mass", 4, iMass) : fQA->Fill("h_AL_Mass", 4, iMass);
1305 if(iMass > cutMass[0] && iMass < cutMass[1]){
1306 fQA->Fill("h_ProtonL_P", 4, p[ix[0]]);
1307 fQA->Fill("h_PionL_P", 4, p[ix[1]]);
c04c80e6 1308 }
3a72645a 1309 if(fMCEvent){
1310 if(4 == fCurrentV0id) fQAmc->Fill("h_L_Mass_S", 4, iMass);
1311 else if(-4 == fCurrentV0id) fQAmc->Fill("h_AL_Mass_S", 4, iMass);
1312 else if(-2 != fCurrentV0id) fQAmc->Fill("h_LAL_Mass_B", 4, iMass);
1313 if(iMass > cutMass[0] && iMass < cutMass[1]){
1314 if(4 == TMath::Abs(fCurrentV0id)){
3a72645a 1315 fQAmc->Fill("h_ProtonL_P_S", 4, p[ixMC[0]]);
1316 fQAmc->Fill("h_PionL_P_S", 4, p[ixMC[1]]);
1317 }
1318 else if(-2 != fCurrentV0id){
3a72645a 1319 fQAmc->Fill("h_ProtonL_P_B", 4, p[ixMC[0]]);
1320 fQAmc->Fill("h_PionL_P_B", 4, p[ixMC[1]]);
1321 }
1322 }
c04c80e6 1323 }
1324
1325 if(iMass < cutMass[0] || iMass > cutMass[1]) {
1326 return kFALSE;
1327 }
1328
1329 // all cuts passed
1330
1331 // assign the lambda type value: Lambda: kTRUE, Anti-Lambda: kFALSE
1332 isLambda = (0 == type) ? kTRUE : kFALSE;
1333
3a72645a 1334 // some MC stuff
1335 if(4 == fCurrentV0id){
1336 fQAmc->Fill("h_lambda_p_S", iP);
1337 }
1338 else if(-4 == fCurrentV0id){
1339 fQAmc->Fill("h_alambda_p_S", iP);
1340 }
1341 else if (-2 != fCurrentV0id && 0 == type){
1342 fQAmc->Fill("h_lambda_p_B", iP);
1343 }
1344 else if(-2 != fCurrentV0id && 0 != type ){
1345 fQAmc->Fill("h_alambda_p_B", iP);
1346 }
1347 //
1348 if(4 == TMath::Abs(fCurrentV0id)){
1349 fQAmc->Fill("h_ProtonL_P_S", 5, p[ixMC[0]]);
1350 fQAmc->Fill("h_PionL_P_S", 5, p[ixMC[1]]);
1351 }
1352 else if(-2 != fCurrentV0id){
1353 fQAmc->Fill("h_ProtonL_P_B", 5, p[ixMC[0]]);
1354 fQAmc->Fill("h_PionL_P_B", 5, p[ixMC[1]]);
1355 }
1356
c04c80e6 1357 return kTRUE;
1358}
1359//________________________________________________________________
1360Double_t AliHFEV0cuts::OpenAngle(AliESDv0 *v0) const {
1361 //
1362 // Opening angle between two daughter tracks
1363 //
1364 Double_t mn[3] = {0,0,0};
1365 Double_t mp[3] = {0,0,0};
1366
1367
1368 v0->GetNPxPyPz(mn[0],mn[1],mn[2]);//reconstructed cartesian momentum components of negative daughter;
1369 v0->GetPPxPyPz(mp[0],mp[1],mp[2]);//reconstructed cartesian momentum components of positive daughter;
1370
1371
1372 Double_t openAngle = TMath::ACos((mp[0]*mn[0] + mp[1]*mn[1] + mp[2]*mn[2])/(TMath::Sqrt(mp[0]*mp[0] + mp[1]*mp[1] + mp[2]*mp[2])*TMath::Sqrt(mn[0]*mn[0] + mn[1]*mn[1] + mn[2]*mn[2])));
1373
1374 return TMath::Abs(openAngle);
1375}
1376//________________________________________________________________
1377Double_t AliHFEV0cuts::PsiPair(AliESDv0 *v0) {
1378 //
1379 // Angle between daughter momentum plane and plane
1380 //
1381
1382 if(!fInputEvent) return -1.;
1383
1384 Float_t magField = fInputEvent->GetMagneticField();
1385
1386 Int_t pIndex = -1;
1387 Int_t nIndex = -1;
1388 if(CheckSigns(v0)){
1389 pIndex = v0->GetPindex();
1390 nIndex = v0->GetNindex();
1391 }
1392 else{
1393 pIndex = v0->GetNindex();
1394 nIndex = v0->GetPindex();
1395 }
1396
1397
1398 AliESDtrack* daughter[2];
1399
1400 daughter[0] = dynamic_cast<AliESDtrack *>(fInputEvent->GetTrack(pIndex));
1401 daughter[1] = dynamic_cast<AliESDtrack *>(fInputEvent->GetTrack(nIndex));
1402
1403 Double_t x, y, z;
1404 v0->GetXYZ(x,y,z);//Reconstructed coordinates of V0; to be replaced by Markus Rammler's method in case of conversions!
1405
1406 Double_t mn[3] = {0,0,0};
1407 Double_t mp[3] = {0,0,0};
1408
1409
1410 v0->GetNPxPyPz(mn[0],mn[1],mn[2]);//reconstructed cartesian momentum components of negative daughter;
1411 v0->GetPPxPyPz(mp[0],mp[1],mp[2]);//reconstructed cartesian momentum components of positive daughter;
1412
1413
1414 Double_t deltat = 1.;
1415 deltat = TMath::ATan(mp[2]/(TMath::Sqrt(mp[0]*mp[0] + mp[1]*mp[1])+1.e-13)) - TMath::ATan(mn[2]/(TMath::Sqrt(mn[0]*mn[0] + mn[1]*mn[1])+1.e-13));//difference of angles of the two daughter tracks with z-axis
1416
1417 Double_t radiussum = TMath::Sqrt(x*x + y*y) + 50;//radius to which tracks shall be propagated
1418
1419 Double_t momPosProp[3];
1420 Double_t momNegProp[3];
1421
1422 AliExternalTrackParam pt(*daughter[0]), nt(*daughter[1]);
1423
1424 Double_t psiPair = 4.;
1425
1426 if(nt.PropagateTo(radiussum,magField) == 0)//propagate tracks to the outside
1427 psiPair = -5.;
1428 if(pt.PropagateTo(radiussum,magField) == 0)
1429 psiPair = -5.;
1430 pt.GetPxPyPz(momPosProp);//Get momentum vectors of tracks after propagation
1431 nt.GetPxPyPz(momNegProp);
1432
1433 Double_t pEle =
1434 TMath::Sqrt(momNegProp[0]*momNegProp[0]+momNegProp[1]*momNegProp[1]+momNegProp[2]*momNegProp[2]);//absolute momentum value of negative daughter
1435 Double_t pPos =
1436 TMath::Sqrt(momPosProp[0]*momPosProp[0]+momPosProp[1]*momPosProp[1]+momPosProp[2]*momPosProp[2]);//absolute momentum value of positive daughter
1437
1438 Double_t scalarproduct =
1439 momPosProp[0]*momNegProp[0]+momPosProp[1]*momNegProp[1]+momPosProp[2]*momNegProp[2];//scalar product of propagated positive and negative daughters' momenta
1440
1441 Double_t chipair = TMath::ACos(scalarproduct/(pEle*pPos));//Angle between propagated daughter tracks
1442
1443 psiPair = TMath::Abs(TMath::ASin(deltat/chipair));
1444
1445 return psiPair;
1446}
1447//________________________________________________________________
1448AliKFParticle *AliHFEV0cuts::CreateMotherParticle(AliVTrack* const pdaughter, AliVTrack* const ndaughter, Int_t pspec, Int_t nspec){
1449 //
1450 // Creates a mother particle
1451 //
1452 AliKFParticle pkfdaughter(*pdaughter, pspec);
1453 AliKFParticle nkfdaughter(*ndaughter, nspec);
1454
1455 // - check if the daughter particles are coming from the primary vertex
1456 // - check the number of tracks that take part in the creaton of primary vertex.
1457 // important: after removeal of candidate tracks there must be at least 2 tracks left
1458 // otherwise the primary vertex will be corrupted
c2690925 1459
c04c80e6 1460
1461 // Create the mother particle
1462 AliKFParticle *m = new AliKFParticle(pkfdaughter, nkfdaughter);
c2690925 1463 // important !!!
1464 m->SetField(fInputEvent->GetMagneticField());
3a72645a 1465 if(TMath::Abs(kElectron) == pspec && TMath::Abs(kElectron) == nspec) m->SetMassConstraint(0, 0.001);
1466 else if(TMath::Abs(kPiPlus) == pspec && TMath::Abs(kPiPlus) == nspec) m->SetMassConstraint(TDatabasePDG::Instance()->GetParticle(kK0Short)->Mass(), 0.);
1467 else if(TMath::Abs(kProton) == pspec && TMath::Abs(kPiPlus) == nspec) m->SetMassConstraint(TDatabasePDG::Instance()->GetParticle(kLambda0)->Mass(), 0.);
1468 else if(TMath::Abs(kPiPlus) == pspec && TMath::Abs(kProton) == nspec) m->SetMassConstraint(TDatabasePDG::Instance()->GetParticle(kLambda0)->Mass(), 0.);
1469 else{
1470 AliError("Wrong daughter ID - mass constraint can not be set");
1471 }
c04c80e6 1472
1473 AliKFVertex improvedVertex = *fPrimaryVertex;
1474 improvedVertex += *m;
1475 m->SetProductionVertex(improvedVertex);
1476
1477 // update 15/06/2010
1478 // mother particle will not be added to primary vertex but only to its copy
1479 // as this confilcts with calling
1480 // m->SetPrimaryVertex() function and
1481 // subsequently removing the mother particle afterwards
1482 // Sourse: Sergey Gorbunov
1483
1484 return m;
1485}
1486//_________________________________________________
1487Bool_t AliHFEV0cuts::LooseRejectK0(AliESDv0 * const v0) const {
1488 //
1489 // Reject K0 based on loose cuts
1490 //
1491 Double_t mass = v0->GetEffMass(AliPID::kPion, AliPID::kPion);
1492 if(mass > 0.494 && mass < 0.501) return kTRUE;
1493 return kFALSE;
1494}
1495
1496//_________________________________________________
1497Bool_t AliHFEV0cuts::LooseRejectLambda(AliESDv0 * const v0) const {
1498 //
1499 // Reject Lambda based on loose cuts
1500 //
1501 Double_t mass1 = v0->GetEffMass(AliPID::kPion, AliPID::kProton);
1502 Double_t mass2 = v0->GetEffMass(AliPID::kProton, AliPID::kPion);
1503
1504 if(mass1 > 1.1 && mass1 < 1.12) return kTRUE;
1505 if(mass2 > 1.1 && mass2 < 1.12) return kTRUE;
1506 return kFALSE;
1507}
1508
1509//_________________________________________________
1510Bool_t AliHFEV0cuts::LooseRejectGamma(AliESDv0 * const v0) const {
1511 //
1512 // Reject Lambda based on loose cuts
1513 //
1514
1515 Double_t mass = v0->GetEffMass(AliPID::kElectron, AliPID::kElectron);
1516
1517 if(mass < 0.02) return kTRUE;
1518 return kFALSE;
1519}
1520//___________________________________________________________________
1521void AliHFEV0cuts::Armenteros(AliESDv0 *v0, Float_t val[2]){
1522 //
1523 // computes the Armenteros variables for given V0
1524 // fills the histogram
1525 // returns the values via "val"
1526 //
1527
1528 Double_t mn[3] = {0,0,0};
1529 Double_t mp[3] = {0,0,0};
1530 Double_t mm[3] = {0,0,0};
1531
1532 if(CheckSigns(v0)){
1533 v0->GetNPxPyPz(mn[0],mn[1],mn[2]); //reconstructed cartesian momentum components of negative daughter
1534 v0->GetPPxPyPz(mp[0],mp[1],mp[2]); //reconstructed cartesian momentum components of positive daughter
1535 }
1536 else{
1537 v0->GetPPxPyPz(mn[0],mn[1],mn[2]); //reconstructed cartesian momentum components of negative daughter
1538 v0->GetNPxPyPz(mp[0],mp[1],mp[2]); //reconstructed cartesian momentum components of positive daughter
1539 }
1540 v0->GetPxPyPz(mm[0],mm[1],mm[2]); //reconstructed cartesian momentum components of mother
1541
1542 TVector3 vecN(mn[0],mn[1],mn[2]);
1543 TVector3 vecP(mp[0],mp[1],mp[2]);
1544 TVector3 vecM(mm[0],mm[1],mm[2]);
1545
1546 Double_t thetaP = acos((vecP * vecM)/(vecP.Mag() * vecM.Mag()));
1547 Double_t thetaN = acos((vecN * vecM)/(vecN.Mag() * vecM.Mag()));
1548
1549 Double_t alfa = ((vecP.Mag())*cos(thetaP)-(vecN.Mag())*cos(thetaN))/
1550 ((vecP.Mag())*cos(thetaP)+(vecN.Mag())*cos(thetaN)) ;
1551 Double_t qt = vecP.Mag()*sin(thetaP);
1552
1553 val[0] = alfa;
1554 val[1] = qt;
1555
1556}
1557//___________________________________________________________________
1558Bool_t AliHFEV0cuts::CheckSigns(AliESDv0* const v0){
1559 //
1560 // check wheter the sign was correctly applied to
1561 // V0 daughter tracks
1562 //
1563
1564 Bool_t correct = kFALSE;
1565
1566 Int_t pIndex = 0, nIndex = 0;
1567 pIndex = v0->GetPindex();
1568 nIndex = v0->GetNindex();
1569
1570 AliESDtrack* d[2];
1571 d[0] = dynamic_cast<AliESDtrack*>(fInputEvent->GetTrack(pIndex));
1572 d[1] = dynamic_cast<AliESDtrack*>(fInputEvent->GetTrack(nIndex));
1573
1574 Int_t sign[2];
1575 sign[0] = (int)d[0]->GetSign();
1576 sign[1] = (int)d[1]->GetSign();
1577
1578 if(-1 == sign[0] && 1 == sign[1]){
1579 correct = kFALSE;
1580 //v0->SetIndex(0, pIndex); // set the index of the negative v0 track
1581 //v0->SetIndex(1, nIndex); // set the index of the positive v0 track
1582 }
1583 else{
1584 correct = kTRUE;
1585 }
1586
1587 //pIndex = v0->GetPindex();
1588 //nIndex = v0->GetNindex();
1589 //printf("-D2: P: %i, N: %i\n", pIndex, nIndex);
1590
1591 return correct;
1592}
3a72645a 1593//___________________________________________________________________
1594Bool_t AliHFEV0cuts::GetConvPosXY(AliESDtrack * const ptrack, AliESDtrack * const ntrack, Double_t convpos[2]){
1595 //
1596 // recalculate the gamma conversion XY postition
1597 //
1598
1599 const Double_t b = fInputEvent->GetMagneticField();
1600
1601 Double_t helixcenterpos[2];
1602 GetHelixCenter(ptrack,b,ptrack->Charge(),helixcenterpos);
1603
1604 Double_t helixcenterneg[2];
1605 GetHelixCenter(ntrack,b,ntrack->Charge(),helixcenterneg);
1606
1607 Double_t poshelix[6];
1608 ptrack->GetHelixParameters(poshelix,b);
1609 Double_t posradius = TMath::Abs(1./poshelix[4]);
1610
1611 Double_t neghelix[6];
1612 ntrack->GetHelixParameters(neghelix,b);
1613 Double_t negradius = TMath::Abs(1./neghelix[4]);
1614
1615 Double_t xpos = helixcenterpos[0];
1616 Double_t ypos = helixcenterpos[1];
1617 Double_t xneg = helixcenterneg[0];
1618 Double_t yneg = helixcenterneg[1];
1619
1620 convpos[0] = (xpos*negradius + xneg*posradius)/(negradius+posradius);
1621 convpos[1] = (ypos*negradius+ yneg*posradius)/(negradius+posradius);
1622
1623 return 1;
1624}
1625//___________________________________________________________________
1626Bool_t AliHFEV0cuts::GetHelixCenter(AliESDtrack * const track, Double_t b,Int_t charge, Double_t center[2]){
1627 // see header file for documentation
1628
1629 Double_t pi = TMath::Pi();
1630
1631 Double_t helix[6];
1632 track->GetHelixParameters(helix,b);
1633
1634 Double_t xpos = helix[5];
1635 Double_t ypos = helix[0];
1636 Double_t radius = TMath::Abs(1./helix[4]);
1637 Double_t phi = helix[2];
1638
1639 if(phi < 0){
1640 phi = phi + 2*pi;
1641 }
1642
1643 phi -= pi/2.;
1644 Double_t xpoint = radius * TMath::Cos(phi);
1645 Double_t ypoint = radius * TMath::Sin(phi);
1646
1647 if(b<0){
1648 if(charge > 0){
1649 xpoint = - xpoint;
1650 ypoint = - ypoint;
1651 }
1652
1653 if(charge < 0){
1654 xpoint = xpoint;
1655 ypoint = ypoint;
1656 }
1657 }
1658 if(b>0){
1659 if(charge > 0){
1660 xpoint = xpoint;
1661 ypoint = ypoint;
1662 }
1663
1664 if(charge < 0){
1665 xpoint = - xpoint;
1666 ypoint = - ypoint;
1667 }
1668 }
1669 center[0] = xpos + xpoint;
1670 center[1] = ypos + ypoint;
1671
1672 return 1;
1673}