1 /**************************************************************************
2 * Copyright(c) 1998-2009, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 #include <TVirtualFitter.h>
18 #include <TStopwatch.h>
21 #include "AliDielectronBtoJPSItoEleCDFfitHandler.h"
22 #include "AliDielectronBtoJPSItoEleCDFfitFCN.h"
24 //-------------------------------------------------------------------------
25 // Class AliDielectronBtoJPSItoEleCDFfitHandler
26 // Class to perform unbinned log-likelihood fit
28 // Origin: C. Di Giglio
29 // Contact: carmelo.digiglio@ba.infn.it , giuseppe.bruno@ba.infn.it
30 //-------------------------------------------------------------------------
32 void CDFFunction(Int_t &npar, Double_t *gin, Double_t &f, Double_t *x, Int_t iflag);
34 ClassImp(AliDielectronBtoJPSItoEleCDFfitHandler)
36 //______________________________________________________________________________
37 void CDFFunction(Int_t &npar, Double_t *gin, Double_t &f, Double_t *par, Int_t iflag)
39 // This function is called by minuit
40 // The corresponding member method is called
41 // using SetObjectFit/GetObjectFit methods of TMinuit
42 AliDielectronBtoJPSItoEleCDFfitHandler* dummy = (AliDielectronBtoJPSItoEleCDFfitHandler *)TVirtualFitter::GetFitter()->GetObjectFit();
43 dummy->CdfFCN(npar, gin, f, par, iflag);
47 //_________________________________________________________________________________________________
48 AliDielectronBtoJPSItoEleCDFfitHandler::AliDielectronBtoJPSItoEleCDFfitHandler():
65 // default constructor
68 //_________________________________________________________________________________________________
69 AliDielectronBtoJPSItoEleCDFfitHandler::AliDielectronBtoJPSItoEleCDFfitHandler(Double_t* decaytime,
70 Double_t* invariantmass, Double_t *pt,Int_t *type, Int_t ncand) :
89 AliInfo("\n+++\n+++ Minimization object AliDielectronBtoJPSItoEleCDFfitHandler created\n+++\n");
90 fLikely = new AliDielectronBtoJPSItoEleCDFfitFCN();
91 AliInfo("\n+++\n+++ CDF fit function object AliDielectronBtoJPSItoEleCDFfitFCN created\n+++\n");
92 AliInfo("Parameter 0 ----> fWeightRes");
93 AliInfo("Parameter 1 ----> fPos");
94 AliInfo("Parameter 2 ----> fNeg");
95 AliInfo("Parameter 3 ----> fSym");
96 AliInfo("Parameter 4 ----> fOneOvLamPlus");
97 AliInfo("Parameter 5 ----> fOneOvLamMinus");
98 AliInfo("Parameter 6 ----> fOneOvLamSym");
99 AliInfo("Parameter 7 ----> fB");
100 AliInfo("Parameter 8 ----> fFsig");
101 AliInfo("Parameter 9 ----> fMmean");
102 AliInfo("Parameter 10 ----> fNexp");
103 AliInfo("Parameter 11 ----> fSigma");
104 AliInfo("Parameter 12 ----> fAlpha");
105 AliInfo("Parameter 13 ----> fNorm");
106 AliInfo("Parameter 14 ----> fBkgNorm");
107 AliInfo("Parameter 15 ----> fBkgMean");
108 AliInfo("Parameter 16 ----> fBkgSlope");
109 AliInfo("Parameter 17 ----> fBkgConst");
110 AliInfo("Parameter 18 ----> fNormGaus1 (FF)");
111 AliInfo("Parameter 19 ----> fNormGaus2 (FF)");
112 AliInfo("Parameter 20 ----> fMean1Res (FF)");
113 AliInfo("Parameter 21 ----> fsigma1Res (FF)");
114 AliInfo("Parameter 22 ----> fMean2Res (FF)");
115 AliInfo("Parameter 23 ----> fsigma2Res (FF)");
116 AliInfo("Parameter 24 ----> fAlfaRes (FF)");
117 AliInfo("Parameter 25 ----> fLambdaRes (FF)");
118 AliInfo("Parameter 26 ----> fNormResExp (FF)");
119 AliInfo("Parameter 27 ----> fNormGaus1 (FS)");
120 AliInfo("Parameter 28 ----> fNormGaus2 (FS)");
121 AliInfo("Parameter 29 ----> fMean1Res (FS)");
122 AliInfo("Parameter 30 ----> fsigma1Res (FS)");
123 AliInfo("Parameter 31 ----> fMean2Res (FS)");
124 AliInfo("Parameter 32 ----> fsigma2Res (FS)");
125 AliInfo("Parameter 33 ----> fAlfaRes (FS)");
126 AliInfo("Parameter 34 ----> fLambdaRes (FS)");
127 AliInfo("Parameter 35 ----> fNormResExp (FS)");
128 AliInfo("Parameter 36 ----> fNormGaus1 (SS)");
129 AliInfo("Parameter 37 ----> fNormGaus2 (SS)");
130 AliInfo("Parameter 38 ----> fMean1Res (SS)");
131 AliInfo("Parameter 39 ----> fsigma1Res (SS)");
132 AliInfo("Parameter 40 ----> fMean2Res (SS)");
133 AliInfo("Parameter 41 ----> fsigma2Res (SS)");
134 AliInfo("Parameter 42 ----> fAlfaRes (SS)");
135 AliInfo("Parameter 43 ----> fLambdaRes (SS)");
136 AliInfo("Parameter 44 ----> fNormResExp (SS)");
137 AliInfo("Parameter 45 ----> fOneOvLamSym1 (additional parameter)");
138 AliInfo("Parameter 46 ----> fSym1 (additional parameter)");
139 AliInfo("Parameter 47 ----> fPolyn4 (additional parameter)");
140 AliInfo("Parameter 48 ----> fPolyn5 (additional parameter)");
142 AliInfo(Form("\n+++\n+++ Number of candidates ---> %d\n+++\n ", ncand));
144 //___________________________________________________________________________
145 AliDielectronBtoJPSItoEleCDFfitHandler& AliDielectronBtoJPSItoEleCDFfitHandler::operator=(const AliDielectronBtoJPSItoEleCDFfitHandler& c)
148 // Assignment operator
151 fIsParamFixed = c.fIsParamFixed;
152 fPrintStatus = c.fPrintStatus;
153 for (Int_t i=0; i<49; ++i) fParamStartValues[i]=c.fParamStartValues[i];
161 fContPlot1 = c.fContPlot1;
162 fContPlot2 = c.fContPlot2;
163 fContPlot3 = c.fContPlot3;
168 //_______________________________________________________________________________________
169 AliDielectronBtoJPSItoEleCDFfitHandler::AliDielectronBtoJPSItoEleCDFfitHandler(const AliDielectronBtoJPSItoEleCDFfitHandler& c) :
171 fIsParamFixed(c.fIsParamFixed),
172 fPrintStatus(c.fPrintStatus),
181 fContPlot1(c.fContPlot1),
182 fContPlot2(c.fContPlot2),
183 fContPlot3(c.fContPlot3),
189 for (Int_t i=0; i<49; ++i) fParamStartValues[i]=c.fParamStartValues[i];
191 //_______________________________________________________________________________________
192 AliDielectronBtoJPSItoEleCDFfitHandler::~AliDielectronBtoJPSItoEleCDFfitHandler()
199 //_______________________________________________________________________________________
200 Int_t AliDielectronBtoJPSItoEleCDFfitHandler::DoMinimization(Int_t step)
203 // performs the minimization
205 if(step == 0 || !fitter){
206 fitter = (TFitter*)TVirtualFitter::Fitter(this,49);
207 fitter->SetFCN(CDFFunction);
208 fitter->SetParameter(0,"fWeightRes",fParamStartValues[0], 1.e-08, 0., 1.e+06);
209 fitter->SetParameter(1,"fPos",fParamStartValues[1], 1.e-08, 0.,1.e+06);
210 fitter->SetParameter(2,"fNeg",fParamStartValues[2], 1.e-08, 0.,1.e+06);
211 fitter->SetParameter(3,"fSym",fParamStartValues[3], 1.e-08, 0.,1.e+06);
212 fitter->SetParameter(4,"fOneOvLamPlus",fParamStartValues[4], 1.e-10, 0.0000001, 5.e+01);
213 fitter->SetParameter(5,"fOneOvLamMinus",fParamStartValues[5], 1.e-10, 0.00000001, 5.e+01);
214 fitter->SetParameter(6,"fOneOvLamSym",fParamStartValues[6], 1.e-10, 0.00000001, 5.e+01);
215 fitter->SetParameter(7,"fB",fParamStartValues[7], 1.e-10, 0., 1.);
216 fitter->SetParameter(8,"fFsig",fParamStartValues[8], 1.e-10, 0., 1.);
217 fitter->SetParameter(9,"fMmean",fParamStartValues[9], 1.e-08, 0., 1.e+04);
218 fitter->SetParameter(10,"fNexp",fParamStartValues[10], 1.e-08, 0., 1.e+02);
219 fitter->SetParameter(11,"fSigma",fParamStartValues[11], 1.e-08, 0., 1.e+04);
220 fitter->SetParameter(12,"fAlpha",fParamStartValues[12], 1.e-08, 0., 1.e+04);
221 fitter->SetParameter(13,"fNorm",fParamStartValues[13], 1.e-08, 0., 1.e+04);
222 fitter->SetParameter(14,"fBkgNorm",fParamStartValues[14], 1.e-08, -1.e+04, 1.e+04);
223 fitter->SetParameter(15,"fBkgMean",fParamStartValues[15], 1.e-08, -1.e+04, 1.e+04);
224 fitter->SetParameter(16,"fBkgSlope",fParamStartValues[16], 1.e-08, -1.e+04, 1.e+04);
225 fitter->SetParameter(17,"fBkgConst",fParamStartValues[17], 1.e-08, -1.e+04, 1.e+04);
226 fitter->SetParameter(18,"fNormGaus1FF",fParamStartValues[18], 1.e-08, 0., 1.e+05);
227 fitter->SetParameter(19,"fNormGaus2FF",fParamStartValues[19], 1.e-08, 0., 1.e+05);
228 fitter->SetParameter(20,"fMean1ResFF",fParamStartValues[20], 1.e-08, 0., 1.e+05);
229 fitter->SetParameter(21,"fSigma1ResFF",fParamStartValues[21], 1.e-08, 0., 1.e+05);
230 fitter->SetParameter(22,"fMean2ResFF",fParamStartValues[22], 1.e-08, 0., 1.e+05);
231 fitter->SetParameter(23,"fSigma2ResFF",fParamStartValues[23], 1.e-08, 0., 1.e+05);
232 fitter->SetParameter(24,"fAlfaResFF",fParamStartValues[24], 1.e-08, 0., 1.e+05);
233 fitter->SetParameter(25,"fLambdaResFF",fParamStartValues[25], 1.e-08, 0., 1.e+05);
234 fitter->SetParameter(26,"fResNormExpFF",fParamStartValues[26], 1.e-08, 0., 1.e+05);
235 fitter->SetParameter(27,"fNormGaus1FS",fParamStartValues[27], 1.e-08, 0., 1.e+05);
236 fitter->SetParameter(28,"fNormGaus2FS",fParamStartValues[28], 1.e-08, 0., 1.e+05);
237 fitter->SetParameter(29,"fMean1ResFS",fParamStartValues[29], 1.e-08, 0., 1.e+05);
238 fitter->SetParameter(30,"fSigma1ResFS",fParamStartValues[30], 1.e-08, 0., 1.e+05);
239 fitter->SetParameter(31,"fMean2ResFS",fParamStartValues[31], 1.e-08, 0., 1.e+05);
240 fitter->SetParameter(32,"fSigma2ResFS",fParamStartValues[32], 1.e-08, 0., 1.e+05);
241 fitter->SetParameter(33,"fAlfaResFS",fParamStartValues[33], 1.e-08, 0., 1.e+05);
242 fitter->SetParameter(34,"fLambdaResFS",fParamStartValues[34], 1.e-08, 0., 1.e+05);
243 fitter->SetParameter(35,"fResNormExpFS",fParamStartValues[35], 1.e-08, 0., 1.e+05);
244 fitter->SetParameter(36,"fNormGaus1SS",fParamStartValues[36], 1.e-08, 0., 1.e+05);
245 fitter->SetParameter(37,"fNormGaus2SS",fParamStartValues[37], 1.e-08, 0., 1.e+05);
246 fitter->SetParameter(38,"fMean1ResSS",fParamStartValues[38], 1.e-08, 0., 1.e+05);
247 fitter->SetParameter(39,"fSigma1ResSS",fParamStartValues[39], 1.e-08, 0., 1.e+05);
248 fitter->SetParameter(40,"fMean2ResSS",fParamStartValues[40], 1.e-08, 0., 1.e+05);
249 fitter->SetParameter(41,"fSigma2ResSS",fParamStartValues[41], 1.e-08, 0., 1.e+05);
250 fitter->SetParameter(42,"fAlfaResSS",fParamStartValues[42], 1.e-08, 0., 1.e+05);
251 fitter->SetParameter(43,"fLambdaResSS",fParamStartValues[43], 1.e-08, 0., 1.e+05);
252 fitter->SetParameter(44,"fResNormExpSS",fParamStartValues[44], 1.e-08, 0., 1.e+05);
253 fitter->SetParameter(45,"fOneOvLamSym1",fParamStartValues[45], 1.e-10, 0.0000001, 5.e+01);
254 fitter->SetParameter(46,"fSym1",fParamStartValues[46], 1.e-08, 0., 1.e+06);
255 fitter->SetParameter(47,"fBkgInvMassPol4",fParamStartValues[47], 1.e-08, 0.0000001, 5.e+01);
256 fitter->SetParameter(48,"fBkgInvMassPol5",fParamStartValues[48], 1.e-08, 0., 5.e+06);
257 //(TMinuit*)fitter->GetMinuit()->SetErrorDef(fUp);
260 for(UInt_t indexparam = 0; indexparam < 49; indexparam++){
261 if(IsParamFixed(indexparam)) fitter->FixParameter((Int_t)indexparam);
262 else fitter->ReleaseParameter((Int_t)indexparam);
264 Double_t arglist[2]={10000,0.1}; Int_t iret = 0;
265 if(step == 2) {Int_t iret1 = fitter->ExecuteCommand("MINOS", arglist ,1); return iret1;}
266 if(step == 0) { fitter->SetParameter(8,"fFsig",fParamStartValues[8], 1.e-10, 0., 1.);
267 iret=fitter->ExecuteCommand("MIGRAD", arglist ,2); }
268 fitter->PrintResults(4,0);
272 TMinuit* minuitPoint = fitter->GetMinuit();
274 TCanvas *c2 = new TCanvas("c2","contours",800,800);
276 //68.27% (1 sigma) confidence level for 2 parameters (fSIG versus fB)
277 minuitPoint->SetErrorDef(1.15); // 2.3/2
278 fContPlot1 = (TGraph*)minuitPoint->Contour(100,7,8);
279 fContPlot1->GetXaxis()->SetRange(0,1);
280 fContPlot1->GetYaxis()->SetRange(0,1);
281 fContPlot1->SetLineColor(42);
282 fContPlot1->SetLineWidth(3);
284 //95% (2 sigma) confidence level for 2 parameters (fSIG versus fB)
285 minuitPoint->SetErrorDef(2.995); // 5.99/2
286 fContPlot2 = (TGraph*)minuitPoint->Contour(100,7,8);
287 fContPlot2->GetXaxis()->SetRange(0,1);
288 fContPlot2->GetYaxis()->SetRange(0,1);
289 fContPlot2->SetLineColor(38);
290 fContPlot2->SetLineWidth(3);
292 //99.73% (3 sigma) confidence level for 2 parameters (fSIG versus fB)
293 minuitPoint->SetErrorDef(5.915); // 11.83/2
294 fContPlot3 = (TGraph*)minuitPoint->Contour(100,7,8);
295 fContPlot3->GetXaxis()->SetRange(0,1);
296 fContPlot3->GetXaxis()->SetTitle("f_{B}");
297 fContPlot3->GetYaxis()->SetTitle("f_{Sig}[2.4-4]");
298 fContPlot3->GetYaxis()->SetRange(0,1);
299 fContPlot3->SetLineColor(34);
300 fContPlot3->SetLineWidth(3);
302 fContPlot3->Draw("al");
303 fContPlot2->Draw("l");
304 fContPlot1->Draw("l");
307 c2->SaveAs("contourPlot.root");
310 AliInfo("Minimization procedure finished\n");
313 //_______________________________________________________________________________________
314 void AliDielectronBtoJPSItoEleCDFfitHandler::CdfFCN(Int_t & /* npar */,
315 Double_t * /* gin */,Double_t &f,Double_t *par,Int_t /* iflag */)
318 // Definition of the FCN to be used by minuit
320 fLikely->SetAllParameters(par);
321 fLikely->ComputeMassIntegral();
322 if(fPrintStatus)fLikely->PrintStatus();
327 f = fLikely->EvaluateLikelihood(fX,fM,fPt, fType,fNcand);
330 AliDebug(2,Form("Real time spent to calculate function == %f \n", t.RealTime()));
331 AliDebug(2,Form("CPU time spent to calculate function == %f \n", t.CpuTime()));
332 AliDebug(2,Form("Actual value of the AliDielectronBtoJPSItoEleCDFfitFCN function == %f \n", f));
336 //_______________________________________________________________________________________
337 void AliDielectronBtoJPSItoEleCDFfitHandler::SetParamStartValues(Double_t inputparamvalues[49])
339 for(Int_t index=0; index < 49; index++) fParamStartValues[index] = inputparamvalues[index];
341 //_______________________________________________________________________________________
342 void AliDielectronBtoJPSItoEleCDFfitHandler::SetResolutionConstants(Double_t* resolutionConst, Int_t type)
345 // Sets constants for the resolution function
347 fLikely->SetResolutionConstants(resolutionConst,type);
350 //_______________________________________________________________________________________
351 void AliDielectronBtoJPSItoEleCDFfitHandler::SetCrystalBallFunction(Bool_t okCB)
354 // Sets the CB as the parametrization for the signal invariant mass spectrum
355 // (otherwise Landau is chosen)
357 fLikely->SetCrystalBallFunction(okCB);
360 //_______________________________________________________________________________________
361 void AliDielectronBtoJPSItoEleCDFfitHandler::SetExponentialFunction(Bool_t okExp)
364 // Sets the CB as the parametrization for the signal invariant mass spectrum
365 // (otherwise Landau is chosen)
367 fLikely->SetExponentialFunction(okExp);
371 //_______________________________________________________________________________________
372 void AliDielectronBtoJPSItoEleCDFfitHandler::SetMassWndHigh(Double_t limit)
375 // Sets upper limit for the invariant mass window (under J/PSI mass peak)
377 fLikely->SetMassWndHigh(limit);
379 //_______________________________________________________________________________________
380 void AliDielectronBtoJPSItoEleCDFfitHandler::SetMassWndLow(Double_t limit)
383 // Sets lower limit for the invariant mass window (under J/PSI mass peak)
385 fLikely->SetMassWndLow(limit);