1 /**************************************************************************
2 * Copyright(c) 1998-1999, 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 **************************************************************************/
18 #include "AliTPCPid.h"
20 //#include <TVector.h>
22 #include <TClonesArray.h>
23 //#include "AliITSIOTrack.h"
24 #include "Riostream.h"
26 // Correction 13.01.2003 Z.S.,Dubna
28 //------------------------------------------------------------
29 // pid class by B. Batyunya
30 // stupid corrections by M.K.
32 //________________________________________________________
33 AliTPCPid::AliTPCPid( const AliTPCPid& r):TObject(r)
35 // dummy copy constructor
37 Float_t AliTPCPid::Qcorr(Float_t xc)
44 fcorr=( 0.766 +0.9692*xc -1.267*xc*xc )*( 1.-TMath::Exp(-xc*64.75) );
45 if(fcorr<=0.1)fcorr=0.1;
48 //-----------------------------------------------------------
49 Float_t AliTPCPid::Qtrm(Int_t track) const
52 // dummy comment (Boris!!!)
54 TVector q(*( this->GetVec(track) ));
59 Int_t nl=0; for(Int_t i=0;i<ml;i++){if(q(i)>fSigmin){vf[nl]=q(i+1);nl++;}}
62 case 1:q(6)=q(1); break;
63 case 2:q(6)=(q(1)+q(2))/2.; break;
65 for(int fi=0;fi<2;fi++){
67 do{ swap=0; float qmin=vf[fi];
68 for(int j=fi+1;j<nl;j++)
69 if(qmin>vf[j]){qmin=vf[j];vf[j]=vf[fi];vf[fi]=qmin;swap=1;};
72 q(6)= (vf[0]+vf[1])/2.;
75 for(Int_t i=0;i<nl;i++){q(i+1)=vf[i];} this->SetVec(track,q);
77 }// --- End AliTPCPid::Qtrm ---
79 Float_t AliTPCPid::Qtrm(Float_t qarr[6],Int_t narr)
84 if(narr>0&&narr<7){ml=narr;}else{return 0;};
85 nl=0; for(Int_t i=0;i<ml;i++){if(qarr[i]>fSigmin){q[nl]=qarr[i];nl++;}}
88 case 1:qm=q[0]; break;
89 case 2:qm=(q[0]+q[1])/2.; break;
92 for(int fi=0;fi<2;fi++){
93 do{ swap=0; qmin=q[fi];
94 for(int j=fi+1;j<nl;j++)
95 if(qmin>q[j]){qmin=q[j];q[j]=q[fi];q[fi]=qmin;swap=1;};
102 }// --- End AliTPCPid::Qtrm ---
104 Int_t AliTPCPid::Wpik(Int_t nc,Float_t q)
109 Float_t qmpi,qmk,sigpi,sigk,dpi,dk,ppi,pk;
115 appi = faprob[0][nc-5];
116 apk = faprob[1][nc-5];
118 cout<<"qmpi,sigpi,qmk,sigk="<<qmpi<<" "<<sigpi<<" "<<qmk<<" "<<sigk<<endl;
119 cout<<"appi,apk="<<appi<<","<<apk<<endl;
121 Float_t dqpi=(q-qmpi)/sigpi;
122 Float_t dqk =(q-qmk )/sigk;
123 dpi =TMath::Abs(dqpi);
125 Double_t dn=appi*TMath::Gaus(q,qmpi,sigpi)+apk*TMath::Gaus(q,qmk,sigk);
127 ppi=appi*TMath::Gaus(q,qmpi,sigpi)/dn;
128 pk = apk*TMath::Gaus(q,qmk, sigk )/dn;
129 }else{fWpi=1;return Pion();}
130 Float_t rpik=ppi/(pk+0.0000001);
132 cout<<"q,dqpi,dqk, Wpik: ppi,pk,rpik="
133 <<q<<" "<<dqpi<<" "<<dqk<<" "<<ppi<<" "<<pk<<" "<<rpik<<endl;
135 fWp=0.; fWpi=ppi; fWk=pk;
136 if( pk>ppi){return Kaon();}else{return Pion();}
138 //-----------------------------------------------------------
139 Int_t AliTPCPid::Wpikp(Int_t nc,Float_t q)
144 Float_t qmpi,qmk,qmp,sigpi,sigk,sigp,ppi,pk,pp;
145 Float_t appi,apk,app;
154 //appi = apk = app = 1.;
155 appi = faprob[0][nc-5];
156 apk = faprob[1][nc-5];
157 app = faprob[2][nc-5];
159 Double_t dn= appi*TMath::Gaus(q,qmpi,sigpi)
160 +apk*TMath::Gaus(q,qmk,sigk)+app*TMath::Gaus(q,qmp,sigp);
162 ppi=appi*TMath::Gaus(q,qmpi,sigpi)/dn;
163 pk = apk*TMath::Gaus(q,qmk, sigk )/dn;
164 pp = app*TMath::Gaus(q,qmp, sigp )/dn;
166 else{fWpi=1;return Pion();}
167 fWp=pp; fWpi=ppi; fWk=pk;
169 cout<<" Wpikp: mid,sig pi,k,p="<<qmpi<<" "<<sigpi<<"; "<<qmk<<" "<<sigk<<"; "
170 <<qmp<<" "<<sigp<<"; "<<endl;
171 cout<<" faprob: "<<appi<<" "<<apk<<" "<<app<<endl;
172 cout<<" ppi,pk,pp="<<ppi<<" "<<pk<<" "<<pp<<endl;
174 if( ppi>pk&&ppi>pp ) { return Pion(); }
175 if(pk>pp){return Kaon();}else{return Proton();}
177 //-----------------------------------------------------------
178 Int_t AliTPCPid::GetPcode(TClonesArray* /*rps*/,Float_t /*pm*/) const
185 //-----------------------------------------------------------
186 Int_t AliTPCPid::GetPcode(AliTPCtrack *track)
191 Double_t xk,par[5]; track->GetExternalParameters(xk,par);
192 Float_t phi=TMath::ASin(par[2]) + track->GetAlpha();
193 if (phi<-TMath::Pi()) phi+=2*TMath::Pi();
194 if (phi>=TMath::Pi()) phi-=2*TMath::Pi();
195 Float_t lam=TMath::ATan(par[3]);
196 Float_t pt1=TMath::Abs(par[4]);
197 Float_t mom=1./(pt1*TMath::Cos(lam));
198 Float_t dedx=track->GetdEdx();
199 Int_t pcode=GetPcode(dedx/40.,mom);
200 cout<<"TPCtrack dedx,mom,pcode="<<dedx<<","<<mom<<","<<pcode<<endl;
201 return pcode?pcode:211;
203 //-----------------------------------------------------------
204 Int_t AliTPCPid::GetPcode(AliITStrackV2 *track)
209 if(track==0)return 0;
210 // track->Propagate(track->GetAlpha(),3.,0.1/65.19*1.848,0.1*1.848);
211 track->PropagateTo(3.,0.0028,65.19);
212 track->PropagateToVertex();
213 Double_t xk,par[5]; track->GetExternalParameters(xk,par);
214 Float_t lam=TMath::ATan(par[3]);
215 Float_t pt1=TMath::Abs(par[4]);
217 if( (pt1*TMath::Cos(lam))!=0. ){ mom=1./(pt1*TMath::Cos(lam)); }else{mom=0.;};
218 Float_t dedx=track->GetdEdx();
219 cout<<"lam,pt1,mom,dedx="<<lam<<","<<pt1<<","<<mom<<","<<dedx<<endl;
220 Int_t pcode=GetPcode(dedx,mom);
221 cout<<"ITS V2 dedx,mom,pcode="<<dedx<<","<<mom<<","<<pcode<<endl;
222 return pcode?pcode:211;
224 //-----------------------------------------------------------
225 Int_t AliTPCPid::GetPcode(Float_t q,Float_t pm)
230 fWpi=fWk=fWp=0.; fPcode=0;
231 //1)---------------------- 0-120 MeV/c --------------
232 if ( pm<=fcut[1][0] )
233 { fWpi=1.; return Pion(); }
234 //2)----------------------120-200 Mev/c ( 29.7.2002 ) -------------
235 if ( pm<=fcut[2][0] )
236 { if( q<fCutKa->Eval(pm) ){fWpi=1.; return Pion(); }
237 else {fWk =1.; return Kaon();} }
238 //3)----------------------200-400 Mev/c -------------
239 if ( pm<=fcut[3][0] )
240 if( q<fCutKa->Eval(pm) )
241 { fWpi=1.;return Pion(); }
243 { if ( q<=fCutPr->Eval(pm) )
244 {fWk=1.;return Kaon();}
245 else {fWp=1.;return Proton();}
247 //4)----------------------400-450 Mev/c -------------
248 if ( pm<=fcut[4][0] )
249 if( q<fCutKaTune*fCutKa->Eval(pm) )
250 { fWpi=1.;return Pion(); }
252 { if( q<fCutPr->Eval(pm) )
253 {fWk=1.;return Kaon();} else {fWp=1.;return Proton(); }
255 //5)----------------------450-500 Mev/c -------------
256 if ( pm<=fcut[5][0] )
257 if ( q>fCutPr->Eval(pm) )
258 {fWp=1.;return Proton();} else {return Wpik(5,q);};
259 //6)----------------------500-550 Mev/c -------------
260 if ( pm<=fcut[6][0] )
261 if ( q>fCutPr->Eval(pm) )
262 {fWp=1.;return Proton();} else {return Wpik(6,q);};
263 //7)----------------------550-600 Mev/c -------------
264 if ( pm<=fcut[7][0] )
265 if ( q>fCutPr->Eval(pm) )
266 {fWp=1.;return Proton();} else {return Wpik(7,q);};
267 //8)----------------------600-650 Mev/c -------------
268 if ( pm<=fcut[8][0] )
269 if ( q>fCutPrTune*fCutPr->Eval(pm) ){fWp=1.;return Proton();}
270 else {return Wpik(8,q);};
271 //9)----------------------650-730 Mev/c -------------
272 if ( pm<=fcut[9][0] )
273 if ( q>fCutPrTune*fCutPr->Eval(pm) ){fWp=1.;return Proton();}
274 else {return Wpik(9,q);};
275 //10)----------------------730-830 Mev/c -------------
276 if( pm<=fcut[10][0] )
277 if ( q>fCutPrTune*fCutPr->Eval(pm) ){fWp=1.;return Proton();}
278 else {return Wpik(10,q);};
279 //11)----------------------830-930 Mev/c -------------
280 if( pm<=fcut[11][0] ){ return Wpikp(11,q); }
281 //12)----------------------930-1030 Mev/c -------------
282 if( pm<=fcut[12][0] )
283 { return Wpikp(12,q); };
287 //-----------------------------------------------------------
288 void AliTPCPid::SetCut(Int_t n,Float_t pm,Float_t pilo,Float_t pihi,
289 Float_t klo,Float_t khi,Float_t plo,Float_t phi)
303 //------------------------------------------------------------
304 void AliTPCPid::SetVec(Int_t ntrack,TVector info) const
309 TClonesArray& arr=*trs;
310 new( arr[ntrack] ) TVector(info);
312 //-----------------------------------------------------------
313 TVector* AliTPCPid::GetVec(Int_t ntrack) const
318 TClonesArray& arr=*trs;
319 return (TVector*)arr[ntrack];
321 //-----------------------------------------------------------
322 void AliTPCPid::SetEdep(Int_t track,Float_t Edep)
328 if( ((TVector*)trs->At(track))->IsValid() )
329 {TVector yy( *((TVector*)trs->At(track)) );xx=yy; }
330 Int_t j=(Int_t)xx(0); if(j>4)return;
331 xx(++j)=Edep;xx(0)=j;
332 TClonesArray &arr=*trs;
333 new(arr[track])TVector(xx);
335 //-----------------------------------------------------------
336 void AliTPCPid::SetPmom(Int_t track,Float_t Pmom)
339 // set part. momentum
342 if( ((TVector*)trs->At(track))->IsValid() )
343 {TVector yy( *((TVector*)trs->At(track)) );xx=yy; }
345 TClonesArray &arr=*trs;
346 new(arr[track])TVector(xx);
348 //-----------------------------------------------------------
349 void AliTPCPid::SetPcod(Int_t track,Int_t partcode)
355 if( ((TVector*)trs->At(track))->IsValid() )
356 {TVector yy( *((TVector*)trs->At(track)) );xx=yy; }
358 {xx(11)=partcode; fmxtrs++;
359 TClonesArray &arr=*trs;
360 new(arr[track])TVector(xx);
363 //-----------------------------------------------------------
364 void AliTPCPid::Print(Int_t track)
369 cout<<fmxtrs<<" tracks in AliITSPid obj."<<endl;
370 if( ((TVector*)trs->At(track))->IsValid() )
371 {TVector xx( *((TVector*)trs->At(track)) );
375 {cout<<"No data for track "<<track<<endl;return;}
377 //-----------------------------------------------------------
378 void AliTPCPid::Tab(void)
383 if(trs->GetEntries()==0){cout<<"No entries in TAB"<<endl;return;}
384 cout<<"------------------------------------------------------------------------"<<endl;
385 cout<<"Nq"<<" q1 "<<" q2 "<<" q3 "<<" q4 "<<" q5 "<<
386 " Qtrm " <<" Wpi "<<" Wk "<<" Wp "<<"Pmom "<<endl;
387 cout<<"------------------------------------------------------------------------"<<endl;
388 for(Int_t i=0;i<trs->GetEntries();i++)
390 TVector xx( *((TVector*)trs->At(i)) );
391 if( xx.IsValid() && xx(0)>0 )
393 TVector xx( *((TVector*)trs->At(i)) );
397 xx(6)=(this->Qtrm(i));
402 // 2)Calculate Wpi,Wk,Wp
403 this->GetPcode(xx(6),xx(10)/1000.);
410 for(Int_t j=1;j<11;j++){
411 cout.width(7);cout.precision(5);cout<<xx(j);
415 // 4)Update data in TVector
416 TClonesArray &arr=*trs;
417 new(arr[i])TVector(xx);
420 {/*cout<<"No data for track "<<i<<endl;*/}
421 }// End loop for tracks
423 void AliTPCPid::Reset(void)
428 for(Int_t i=0;i<trs->GetEntries();i++){
430 TClonesArray &arr=*trs;
431 new(arr[i])TVector(xx);
434 //-----------------------------------------------------------
435 AliTPCPid::AliTPCPid(Int_t ntrack)
437 trs = new TClonesArray("TVector",ntrack);
438 TClonesArray &arr=*trs;
439 for(Int_t i=0;i<ntrack;i++)new(arr[i])TVector(0,11);
442 //fCutKa = new TF1("fkaons","[0]/x/x+[1]",0.1,1.2);
443 //fCutPr = new TF1("fprotons","[0]/x/x +[1]",0.2,1.2);
446 frmska = new TF1("x_frmska","1.46-7.82*x+16.78*x^2-15.53*x^3+5.24*x^4 ",
448 fCutKa = new TF1("fkaons",
449 "1.25+0.044/x/x+1.25+0.044*x-13.87*x^2+22.37*x^3-10.05*x^4-2.5*x_frmska",
451 fCutPr = new TF1("fprotons",
452 "0.83*(15.32-56.094*x+89.962*x^2-66.1856*x^3+18.4052*x^4)",
454 fCutKaTune=1.1; // 0.92;
455 fCutPrTune=1.0; //0.80;
458 // Ncut Pmom pilo pihi klo khi plo phi
459 // fcut[j] [0] [1] [2] [3] [4] [5] [6]
460 //----------------------------------------------------------------
461 SetCut( 1, 0.120, 0. , 0. , kinf , kinf , kinf , kinf );
462 SetCut( 2, 0.200, 0. , 6.0 , 6.0 , kinf , kinf , kinf ); //120-200
463 SetCut( 3, 0.400, 0. , 3.5 , 3.5 , 9.0 , 9.0 , kinf ); //200-400
464 SetCut( 4, 0.450, 0. , 1.9 , 1.9 , 4.0 , 4.0 , kinf ); //400-450
465 //----------------------------------------------------------------
466 SetCut( 5, 0.500, 0.976, 0.108, 1.484 , 0.159 , 3.5 , kinf ); //450-500
467 SetCut( 6, 0.550, 0.979, 0.108, 1.376 , 0.145 , 3.0 , kinf ); //500-550
468 //----------------------------------------------------------------
469 SetCut( 7, 0.600, 0.984, 0.111, 1.295 , 0.146 , 2.7 , kinf ); //550-600
470 SetCut( 8, 0.650, 0.989, 0.113, 1.239 , 0.141 , 2.5 , kinf ); //600-650
471 SetCut( 9, 0.730, 0.995, 0.109, 1.172 , 0.132 , 2.0 , kinf ); //650-730
472 //----------------------------------------------------------------
473 SetCut( 10, 0.830, 1.008, 0.116, 1.117 , 0.134 , 1.703, 0.209 ); //730-830
474 SetCut( 11, 0.930, 1.019, 0.115, 1.072 , 0.121 , 1.535, 0.215 ); //830-930
475 SetCut( 12, 1.230, 1.035, 0.117, 1.053 , 0.140 ,1.426, 0.270); //930-1030
476 //------------------------ pi,K ---------------------
477 faprob[0][0]=33219.; faprob[1][0]=1971.; // faprob[0][i] - pions
478 faprob[0][1]=28828.; faprob[1][1]=1973.; // faprob[1][i] - kaons
479 //---------------------------------------------------
480 faprob[0][2]=24532.; faprob[1][2]=1932.; faprob[2][2]=1948.;
481 faprob[0][3]=20797.; faprob[1][3]=1823.; faprob[2][3]=1970.;
482 faprob[0][4]=27017.; faprob[1][4]=2681.; faprob[2][4]=2905.;
483 //------------------------ pi,K,p -------------------
484 faprob[0][5]= 24563.; faprob[1][5]=2816.; faprob[2][5]=3219.;
485 faprob[0][6]= 16877.; faprob[1][6]=2231.; faprob[2][6]=2746.;
486 faprob[0][7]= 11557.; faprob[1][7]=1681; faprob[2][7]=2190.;
490 //-----------------------------------------------------------