Line data Source code
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 :
16 : /* $Id$ */
17 :
18 : //-------------------------------------------------------------------------
19 : // AliESDUtils - This is a namespace that temporary provides general
20 : // purpose ESD utilities to avoid unnecessary dependencies
21 : // between PWG libraries. To be removed/replaced by AODB
22 : // framework.
23 : //
24 : //-------------------------------------------------------------------------
25 : // Author: Andrei Gheata
26 :
27 : #include "AliESDUtils.h"
28 :
29 : #include "AliESDEvent.h"
30 : #include "AliESDVZERO.h"
31 : #include "AliVertexerTracks.h"
32 :
33 : //______________________________________________________________________________
34 : Float_t AliESDUtils::GetCorrV0(const AliVEvent* esd, Float_t &v0CorrResc, Float_t *v0multChCorr, Float_t *v0multChCorrResc)
35 : {
36 : // Correct V0 non-linearity, prepare a version rescaled to SPD2 corr.
37 : // Please describe better parameters...
38 : Double_t *par0;
39 : Double_t *par1;
40 : Double_t *par2;
41 :
42 0 : Double_t par0_137161[64] = { 6.71e-02 , 6.86e-02 , 7.06e-02 , 6.32e-02 ,
43 : 5.91e-02 , 6.07e-02 , 5.78e-02 , 5.73e-02 , 5.91e-02 , 6.22e-02 ,
44 : 5.90e-02 , 6.11e-02 , 5.55e-02 , 5.29e-02 , 5.19e-02 , 5.56e-02 ,
45 : 6.25e-02 , 7.03e-02 , 5.64e-02 , 5.81e-02 , 4.57e-02 , 5.30e-02 ,
46 : 5.13e-02 , 6.43e-02 , 6.27e-02 , 6.48e-02 , 6.07e-02 , 1.01e-01 ,
47 : 6.68e-02 , 7.16e-02 , 6.36e-02 , 5.95e-02 , 2.52e-02 , 2.82e-02 ,
48 : 2.56e-02 , 2.86e-02 , 2.82e-02 , 2.10e-02 , 2.13e-02 , 2.32e-02 ,
49 : 2.75e-02 , 4.34e-02 , 3.78e-02 , 4.52e-02 , 4.11e-02 , 3.89e-02 ,
50 : 4.10e-02 , 3.73e-02 , 4.51e-02 , 5.07e-02 , 5.42e-02 , 4.74e-02 ,
51 : 4.33e-02 , 4.44e-02 , 4.64e-02 , 3.01e-02 , 6.38e-02 , 5.26e-02 ,
52 : 4.99e-02 , 5.26e-02 , 5.47e-02 , 3.84e-02 , 5.00e-02 , 5.20e-02 };
53 0 : Double_t par1_137161[64] = { -6.68e-05 , -7.78e-05 , -6.88e-05 , -5.92e-05 ,
54 : -2.43e-05 , -3.54e-05 , -2.91e-05 , -1.99e-05 , -1.40e-05 , -4.01e-05 ,
55 : -2.29e-05 , -3.68e-05 , -2.53e-05 , -2.44e-06 , -9.22e-06 , -1.51e-05 ,
56 : -2.80e-05 , -2.34e-05 , -1.72e-05 , -1.81e-05 , -1.29e-05 , -2.65e-05 ,
57 : -1.61e-05 , -2.86e-05 , -1.74e-05 , -4.23e-05 , -3.41e-05 , -1.05e-04 ,
58 : -2.76e-05 , -4.71e-05 , -3.06e-05 , -2.32e-05 , -1.55e-06 , 2.15e-05 ,
59 : 1.40e-05 , 2.16e-05 , 1.21e-05 , 3.05e-06 , 1.67e-05 , -3.84e-06 ,
60 : 3.09e-06 , 1.50e-05 , 3.47e-06 , 4.87e-06 , -3.71e-07 , -1.75e-06 ,
61 : -1.80e-06 , 9.99e-06 , -6.46e-06 , -4.91e-06 , 1.33e-05 , -2.52e-07 ,
62 : -3.85e-06 , 4.94e-06 , -2.48e-07 , -1.20e-05 , 2.07e-06 , 6.12e-06 ,
63 : -1.18e-06 , 4.54e-06 , -1.54e-05 , -1.25e-05 , 1.46e-06 , -6.67e-06 };
64 0 : Double_t par2_137161[64] = { 1.29e-08 , 1.51e-08 , 1.43e-08 , 1.11e-08 ,
65 : 5.04e-09 , 6.99e-09 , 5.58e-09 , 4.15e-09 , 4.00e-09 , 8.22e-09 ,
66 : 4.97e-09 , 7.66e-09 , 4.91e-09 , 1.10e-09 , 2.64e-09 , 3.64e-09 ,
67 : 5.76e-09 , 5.46e-09 , 3.38e-09 , 3.47e-09 , 2.43e-09 , 4.13e-09 ,
68 : 2.80e-09 , 5.80e-09 , 3.86e-09 , 7.46e-09 , 5.98e-09 , 2.58e-08 ,
69 : 5.50e-09 , 8.72e-09 , 5.23e-09 , 4.37e-09 , 2.33e-09 , -6.01e-10 ,
70 : 3.99e-11 , -2.02e-10 , 7.67e-10 , 2.03e-09 , 1.17e-10 , 2.56e-09 ,
71 : 1.16e-09 , -4.75e-10 , 1.28e-09 , 1.23e-09 , 1.62e-09 , 1.61e-09 ,
72 : 1.93e-09 , 2.97e-10 , 2.21e-09 , 2.16e-09 , 5.22e-10 , 1.03e-09 ,
73 : 1.56e-09 , 5.00e-10 , 1.01e-09 , 2.93e-09 , 1.05e-09 , 9.96e-11 ,
74 : 1.21e-09 , 7.45e-10 , 3.07e-09 , 2.31e-09 , 6.70e-10 , 1.89e-09 };
75 :
76 0 : Double_t par0_137366[64] = { 7.12e-02 , 7.34e-02 , 7.39e-02 , 6.54e-02 , 6.11e-02 , 6.31e-02 , 6.15e-02 ,
77 : 6.00e-02 , 6.10e-02 , 6.49e-02 , 6.17e-02 , 6.33e-02 , 6.00e-02 , 5.48e-02 ,
78 : 5.44e-02 , 5.81e-02 , 6.49e-02 , 7.07e-02 , 5.91e-02 , 6.18e-02 , 4.82e-02 ,
79 : 5.67e-02 , 5.36e-02 , 6.60e-02 , 6.37e-02 , 6.78e-02 , 6.31e-02 , 1.04e-01 ,
80 : 6.91e-02 , 7.32e-02 , 6.61e-02 , 6.16e-02 , 2.64e-02 , 2.81e-02 , 2.64e-02 ,
81 : 2.85e-02 , 2.87e-02 , 2.18e-02 , 2.19e-02 , 2.43e-02 , 2.81e-02 , 4.37e-02 ,
82 : 3.90e-02 , 4.66e-02 , 4.24e-02 , 4.09e-02 , 4.21e-02 , 3.88e-02 , 4.83e-02 ,
83 : 5.23e-02 , 5.44e-02 , 4.85e-02 , 4.42e-02 , 4.58e-02 , 4.74e-02 , 3.14e-02 ,
84 : 6.31e-02 , 5.30e-02 , 5.01e-02 , 5.33e-02 , 5.70e-02 , 3.95e-02 , 4.98e-02 , 5.31e-02 };
85 0 : Double_t par1_137366[64] = { -6.99e-05 , -6.99e-05 , -6.94e-05 , -6.55e-05 , -3.55e-05 , -4.50e-05 ,
86 : -3.10e-05 , -2.81e-05 , -2.29e-05 , -3.89e-05 , -2.53e-05 , -4.25e-05 ,
87 : -1.87e-05 , -2.01e-05 , -1.53e-05 , -2.14e-05 , -2.86e-05 , -4.70e-05 ,
88 : -2.23e-05 , -3.30e-05 ,-9.74e-06 , -2.62e-05 , -1.76e-05 , -2.38e-05 ,
89 : -2.40e-05 , -3.43e-05 , -2.75e-05 , -6.86e-05 ,-2.35e-05 , -4.45e-05 ,
90 : -2.51e-05 , -2.20e-05 , -1.25e-16 , -2.04e-17 , -2.06e-17 , -3.74e-19 ,
91 : -1.18e-18 , -2.02e-15 , -3.78e-06 , -1.26e-06 , -2.71e-06 , -6.23e-17 ,
92 : -7.39e-08 , -1.76e-16 , -8.98e-06 , -4.10e-18 , -1.34e-05 , -1.06e-16 ,
93 : -3.34e-06 , -1.04e-05 , -5.28e-06 , -7.34e-06 , -1.05e-05 , -7.68e-06 ,
94 : -1.78e-05 , -1.19e-05 , -1.78e-05 , -1.34e-06 , -9.23e-06 , -3.34e-06 ,
95 : -8.02e-06 , -1.39e-05 , -1.38e-05 , -1.40e-05 };
96 0 : Double_t par2_137366[64] = { 1.41e-08 , 1.47e-08 , 1.48e-08 , 1.24e-08 , 6.82e-09 , 8.73e-09 , 6.26e-09 ,
97 : 5.53e-09 , 5.40e-09 , 7.93e-09 , 5.49e-09 , 8.77e-09 , 4.21e-09 , 3.93e-09 ,
98 : 3.60e-09 , 4.67e-09 , 5.59e-09 , 8.81e-09 , 3.89e-09 , 6.19e-09 , 1.97e-09 ,
99 : 4.38e-09 , 3.26e-09 , 5.00e-09 , 4.58e-09 , 6.39e-09 , 5.03e-09 , 1.30e-08 ,
100 : 4.95e-09 , 8.26e-09 , 4.57e-09 , 4.10e-09 , 2.35e-09 , 2.30e-09 , 2.15e-09 ,
101 : 2.27e-09 , 2.17e-09 , 2.27e-09 , 2.97e-09 , 2.25e-09 , 1.69e-09 , 1.44e-09 ,
102 : 1.66e-09 , 1.75e-09 , 2.88e-09 , 1.82e-09 , 3.64e-09 , 1.80e-09 , 1.71e-09 ,
103 : 2.66e-09 , 3.01e-09 , 1.95e-09 , 2.64e-09 , 2.42e-09 , 3.68e-09 , 2.66e-09 ,
104 : 3.92e-09 , 1.18e-09 , 2.26e-09 , 1.57e-09 , 2.02e-09 , 2.71e-09 , 2.99e-09 , 3.04e-09 };
105 :
106 :
107 0 : if (esd->GetRunNumber() <= 137165) {
108 0 : par0=par0_137161;
109 0 : par1=par1_137161;
110 0 : par2=par2_137161;
111 0 : } else {
112 0 : par0=par0_137366;
113 0 : par1=par1_137366;
114 0 : par2=par2_137366;
115 : }
116 : //
117 : Float_t multCorr = 0;
118 : Float_t multCorr2 = 0;
119 0 : Float_t multChCorr[64];
120 0 : Float_t multChCorrResc[64];
121 0 : AliVVZERO* esdV0 = esd->GetVZEROData();
122 0 : for(Int_t i = 0; i < 64; ++i) {
123 0 : if (esdV0->TestBit(AliESDVZERO::kCorrectedForSaturation)) {
124 0 : multChCorr[i] = esdV0->GetMultiplicity(i);
125 0 : }
126 : else {
127 0 : Double_t b = (esdV0->GetMultiplicity(i)*par1[i]-par0[i]);
128 0 : Double_t s = (b*b-4.*par2[i]*esdV0->GetMultiplicity(i)*esdV0->GetMultiplicity(i));
129 0 : Double_t n = (s<0) ? -b : (-b + TMath::Sqrt(s));
130 0 : multChCorr[i] = 2.*esdV0->GetMultiplicity(i)/n*par0[i];
131 : }
132 0 : multCorr += multChCorr[i];
133 0 : multChCorrResc[i] = multChCorr[i]/par0[i]/64.;
134 0 : multCorr2 += multChCorrResc[i];
135 : }
136 0 : v0CorrResc = multCorr2;
137 0 : if (v0multChCorr)
138 0 : for(Int_t i = 0; i < 64; ++i) v0multChCorr[i] = multChCorr[i];
139 0 : if (v0multChCorrResc)
140 0 : for(Int_t i = 0; i < 64; ++i) v0multChCorrResc[i] = multChCorrResc[i];
141 :
142 0 : return multCorr;
143 0 : }
144 :
145 : //______________________________________________________________________________
146 : Float_t AliESDUtils::GetCorrSPD2(Float_t spd2raw,Float_t zv)
147 : {
148 : // renormalize N spd2 clusters at given Zv to acceptance at Zv=0
149 : const Double_t pars[] = {8.10030e-01,-2.80364e-03,-7.19504e-04};
150 0 : zv -= pars[0];
151 0 : Float_t corr = 1 + zv*(pars[1] + zv*pars[2]);
152 0 : return corr>0 ? spd2raw/corr : -1;
153 : }
154 :
155 : //______________________________________________________________________________
156 : Bool_t AliESDUtils::RefitESDVertexTracks(AliESDEvent* esdEv, Int_t algo, const Double_t *cuts)
157 : {
158 : // Refit ESD VertexTracks and redo tracks->RelateToVertex
159 : // Default vertexin algorithm is 6 (multivertexer). To use old vertexed, use algo=1
160 : //
161 : static AliVertexerTracks* vtFinder = 0;
162 : static int currRun = 0;
163 : static int defAlgo = -1;
164 : static double bkgauss = 0;
165 : const Bool_t kVtxConstr = kTRUE;
166 : //
167 0 : if (!vtFinder) { // create vertexer
168 0 : vtFinder = new AliVertexerTracks(esdEv->GetMagneticField());
169 0 : printf("Initialized vertexer for VertexTracks refit with field %f kG\n",esdEv->GetMagneticField());
170 : //
171 0 : vtFinder->SetITSMode();
172 0 : vtFinder->SetConstraintOff();
173 0 : }
174 : //
175 0 : if ( (cuts && algo>11) || algo!=defAlgo) {
176 : // if cuts array is provided, then interpret algo as the number of parameters in the cuts.
177 : // otherwise, interpret it as an algorithm ID for hardwired cuts below
178 0 : if (cuts) {
179 0 : vtFinder->SetCuts((double*)cuts,algo);
180 0 : defAlgo = (Int_t)(cuts[10]);
181 0 : }
182 : else {
183 : const int kNCuts=21;
184 0 : double vtCuts[kNCuts] =
185 : {1.00e-01,1.00e-01,5.00e-01,3.00e+00,1.00e+00,3.00e+00,1.00e+02,
186 : 1.00e+03,3.00e+00,3.00e+01,6.00e+00,4.00e+00,7.00e+00,1.00e+03,
187 : 5.00e+00,5.00e-02,1.00e-03,2.00e+00,1.00e+01,1.00e+00,5.00e+01};
188 : //
189 0 : vtCuts[10] = algo;
190 0 : defAlgo = algo;
191 0 : vtFinder->SetCuts(vtCuts,kNCuts);
192 0 : printf("Setting vertexing algorithm to %d\n",defAlgo);
193 0 : }
194 : }
195 0 : if (defAlgo<0 || defAlgo>AliVertexerTracks::kMultiVertexer) {
196 0 : printf("Vertexer algorithms 0:%d are supported... \n",defAlgo);
197 0 : return kFALSE;
198 : }
199 : //
200 0 : if (currRun!=esdEv->GetRunNumber() && kVtxConstr) { // update diamond for this run
201 0 : double pos[3]={esdEv->GetDiamondX(),esdEv->GetDiamondY(),0};
202 0 : Float_t diamondcovxy[3]={0};
203 0 : esdEv->GetDiamondCovXY(diamondcovxy);
204 0 : Double_t cov[6]={diamondcovxy[0],diamondcovxy[1],diamondcovxy[2],0.,0.,7.*7.};
205 0 : AliESDVertex initVertex(pos,cov,1.,1);
206 0 : vtFinder->SetVtxStart(&initVertex);
207 0 : bkgauss = esdEv->GetMagneticField();
208 0 : vtFinder->SetFieldkG(bkgauss);
209 0 : currRun = esdEv->GetRunNumber();
210 0 : printf("Imposed Vtx constraint for run %d\n",currRun);
211 0 : initVertex.Print();
212 0 : }
213 : //
214 : // reset old vertex info
215 0 : if (esdEv->GetPileupVerticesTracks()) esdEv->GetPileupVerticesTracks()->Clear();
216 0 : ((AliESDVertex*)esdEv->GetPrimaryVertexTracks())->SetNContributors(-1);
217 : //
218 0 : AliESDVertex *pvtx=vtFinder->FindPrimaryVertex(esdEv);
219 0 : if (pvtx) {
220 0 : if (pvtx->GetStatus()) {
221 0 : esdEv->SetPrimaryVertexTracks(pvtx);
222 0 : for (Int_t i=esdEv->GetNumberOfTracks(); i--;) {
223 0 : AliESDtrack *t = esdEv->GetTrack(i);
224 0 : Double_t x[3]; t->GetXYZ(x);
225 0 : t->RelateToVertex(pvtx, bkgauss, kVeryBig);
226 0 : }
227 0 : }
228 0 : delete pvtx;
229 : }
230 0 : else return kFALSE;
231 : //
232 0 : return kTRUE;
233 0 : }
234 : //________________________________________________________________________
235 : Float_t AliESDUtils::GetCorrV0A(Float_t v0araw, Float_t zv)
236 : {
237 : // renormalize v0A signal at given Zv to acceptance at Zv=0
238 : const Double_t pars[] = {0.998864,-0.00407311,-2.47408e-06};
239 0 : zv -= pars[0];
240 0 : Float_t corr = 1 + zv*(pars[1] + zv*pars[2]);
241 0 : return corr>0 ? v0araw/corr : -1;
242 : }
243 : //________________________________________________________________________
244 : Float_t AliESDUtils::GetCorrV0C(Float_t v0craw, Float_t zv)
245 : {
246 : // renormalize v0C signal at given Zv to acceptance at Zv=0
247 : const Double_t pars[] = {1.00083,0.00427623,-2.69047e-05};
248 0 : zv -= pars[0];
249 0 : Float_t corr = 1 + zv*(pars[1] + zv*pars[2]);
250 0 : return corr>0 ? v0craw/corr : -1;
251 : }
252 : //________________________________________________________________________
253 : Float_t AliESDUtils::GetCorrV0A0(Float_t v0a0raw, Float_t zv)
254 : {
255 : // renormalize v0A-0 signal at given Zv to acceptance at Zv=0
256 : const Double_t pars[] = {0.998243,-0.00209013,-6.97686e-06};
257 0 : zv -= pars[0];
258 0 : Float_t corr = 1 + zv*(pars[1] + zv*pars[2]);
259 0 : return corr>0 ? v0a0raw/corr : -1;
260 : }
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