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 "AliKalmanTrack.h"
25 #include "Riostream.h"
31 // Correction 13.01.2003 Z.S.,Dubna
33 //------------------------------------------------------------
34 // pid class by B. Batyunya
35 // stupid corrections by M.K.
37 //_______________________________________________________
38 //________________________________________________________
39 AliTPCPid::AliTPCPid( const AliTPCPid& r):TObject(r),
58 // dummy copy constructor
60 Float_t AliTPCPid::Qcorr(Float_t xc)
67 fcorr=( 0.766 +0.9692*xc -1.267*xc*xc )*( 1.-TMath::Exp(-xc*64.75) );
68 if(fcorr<=0.1)fcorr=0.1;
71 //__________________________________________________________
72 AliTPCPid & AliTPCPid::operator =(const AliTPCPid & param)
75 // assignment operator - dummy
78 fSigmin=param.fSigmin;
82 //-----------------------------------------------------------
83 Float_t AliTPCPid::Qtrm(Int_t track) const
86 // dummy comment (Boris!!!)
88 TVector q(*( this->GetVec(track) ));
93 Int_t nl=0; for(Int_t i=0;i<ml;i++){if(q(i)>fSigmin){vf[nl]=q(i+1);nl++;}}
96 case 1:q(6)=q(1); break;
97 case 2:q(6)=(q(1)+q(2))/2.; break;
99 for(int fi=0;fi<2;fi++){
101 do{ swap=0; float qmin=vf[fi];
102 for(int j=fi+1;j<nl;j++)
103 if(qmin>vf[j]){qmin=vf[j];vf[j]=vf[fi];vf[fi]=qmin;swap=1;};
106 q(6)= (vf[0]+vf[1])/2.;
109 for(Int_t i=0;i<nl;i++){q(i+1)=vf[i];} this->SetVec(track,q);
111 }// --- End AliTPCPid::Qtrm ---
113 Float_t AliTPCPid::Qtrm(Float_t qarr[6],Int_t narr)
116 Float_t q[6],qm,qmin;
118 if(narr>0&&narr<7){ml=narr;}else{return 0;};
119 nl=0; for(Int_t i=0;i<ml;i++){if(qarr[i]>fSigmin){q[nl]=qarr[i];nl++;}}
122 case 1:qm=q[0]; break;
123 case 2:qm=(q[0]+q[1])/2.; break;
126 for(int fi=0;fi<2;fi++){
127 do{ swap=0; qmin=q[fi];
128 for(int j=fi+1;j<nl;j++)
129 if(qmin>q[j]){qmin=q[j];q[j]=q[fi];q[fi]=qmin;swap=1;};
136 }// --- End AliTPCPid::Qtrm ---
138 Int_t AliTPCPid::Wpik(Int_t nc,Float_t q)
143 Float_t qmpi,qmk,sigpi,sigk,dpi,dk,ppi,pk;
149 appi = faprob[0][nc-5];
150 apk = faprob[1][nc-5];
152 cout<<"qmpi,sigpi,qmk,sigk="<<qmpi<<" "<<sigpi<<" "<<qmk<<" "<<sigk<<endl;
153 cout<<"appi,apk="<<appi<<","<<apk<<endl;
155 Float_t dqpi=(q-qmpi)/sigpi;
156 Float_t dqk =(q-qmk )/sigk;
157 dpi =TMath::Abs(dqpi);
159 Double_t dn=appi*TMath::Gaus(q,qmpi,sigpi)+apk*TMath::Gaus(q,qmk,sigk);
161 ppi=appi*TMath::Gaus(q,qmpi,sigpi)/dn;
162 pk = apk*TMath::Gaus(q,qmk, sigk )/dn;
163 }else{fWpi=1;return Pion();}
164 Float_t rpik=ppi/(pk+0.0000001);
166 cout<<"q,dqpi,dqk, Wpik: ppi,pk,rpik="
167 <<q<<" "<<dqpi<<" "<<dqk<<" "<<ppi<<" "<<pk<<" "<<rpik<<endl;
169 fWp=0.; fWpi=ppi; fWk=pk;
170 if( pk>ppi){return Kaon();}else{return Pion();}
172 //-----------------------------------------------------------
173 Int_t AliTPCPid::Wpikp(Int_t nc,Float_t q)
178 Float_t qmpi,qmk,qmp,sigpi,sigk,sigp,ppi,pk,pp;
179 Float_t appi,apk,app;
188 //appi = apk = app = 1.;
189 appi = faprob[0][nc-5];
190 apk = faprob[1][nc-5];
191 app = faprob[2][nc-5];
193 Double_t dn= appi*TMath::Gaus(q,qmpi,sigpi)
194 +apk*TMath::Gaus(q,qmk,sigk)+app*TMath::Gaus(q,qmp,sigp);
196 ppi=appi*TMath::Gaus(q,qmpi,sigpi)/dn;
197 pk = apk*TMath::Gaus(q,qmk, sigk )/dn;
198 pp = app*TMath::Gaus(q,qmp, sigp )/dn;
200 else{fWpi=1;return Pion();}
201 fWp=pp; fWpi=ppi; fWk=pk;
203 cout<<" Wpikp: mid,sig pi,k,p="<<qmpi<<" "<<sigpi<<"; "<<qmk<<" "<<sigk<<"; "
204 <<qmp<<" "<<sigp<<"; "<<endl;
205 cout<<" faprob: "<<appi<<" "<<apk<<" "<<app<<endl;
206 cout<<" ppi,pk,pp="<<ppi<<" "<<pk<<" "<<pp<<endl;
208 if( ppi>pk&&ppi>pp ) { return Pion(); }
209 if(pk>pp){return Kaon();}else{return Proton();}
211 //-----------------------------------------------------------
212 Int_t AliTPCPid::GetPcode(TClonesArray* /*rps*/,Float_t /*pm*/) const
219 //-----------------------------------------------------------
220 Int_t AliTPCPid::GetPcode(AliTPCtrack *track)
225 Double_t xk,par[5]; track->GetExternalParameters(xk,par);
226 Float_t phi=TMath::ASin(par[2]) + track->GetAlpha();
227 if (phi<-TMath::Pi()) phi+=2*TMath::Pi();
228 if (phi>=TMath::Pi()) phi-=2*TMath::Pi();
229 Float_t lam=TMath::ATan(par[3]);
230 Float_t pt1=TMath::Abs(par[4]);
231 Float_t mom=1./(pt1*TMath::Cos(lam));
232 Float_t dedx=track->GetdEdx();
233 Int_t pcode=GetPcode(dedx/40.,mom);
234 cout<<"TPCtrack dedx,mom,pcode="<<dedx<<","<<mom<<","<<pcode<<endl;
235 return pcode?pcode:211;
238 //-----------------------------------------------------------
239 Int_t AliTPCPid::GetPcode(AliKalmanTrack *track)
244 if(track==0)return 0;
245 // track->Propagate(track->GetAlpha(),3.,0.1/65.19*1.848,0.1*1.848);
246 track->PropagateTo(3.,0.0028,65.19);
247 track->PropagateToVertex();
248 Double_t xk,par[5]; track->GetExternalParameters(xk,par);
249 Float_t lam=TMath::ATan(par[3]);
250 Float_t pt1=TMath::Abs(par[4]);
252 if( (pt1*TMath::Cos(lam))!=0. ){ mom=1./(pt1*TMath::Cos(lam)); }else{mom=0.;};
253 Float_t dedx=track->GetPIDsignal();
254 cout<<"lam,pt1,mom,dedx="<<lam<<","<<pt1<<","<<mom<<","<<dedx<<endl;
255 Int_t pcode=GetPcode(dedx,mom);
256 cout<<"ITS V2 dedx,mom,pcode="<<dedx<<","<<mom<<","<<pcode<<endl;
257 return pcode?pcode:211;
260 //-----------------------------------------------------------
261 Int_t AliTPCPid::GetPcode(Float_t q,Float_t pm)
266 fWpi=fWk=fWp=0.; fPcode=0;
267 //1)---------------------- 0-120 MeV/c --------------
268 if ( pm<=fcut[1][0] )
269 { fWpi=1.; return Pion(); }
270 //2)----------------------120-200 Mev/c ( 29.7.2002 ) -------------
271 if ( pm<=fcut[2][0] )
272 { if( q<fCutKa->Eval(pm) ){fWpi=1.; return Pion(); }
273 else {fWk =1.; return Kaon();} }
274 //3)----------------------200-400 Mev/c -------------
275 if ( pm<=fcut[3][0] ){
276 if( q<fCutKa->Eval(pm) )
277 { fWpi=1.;return Pion(); }
279 { if ( q<=fCutPr->Eval(pm) )
280 {fWk=1.;return Kaon();}
281 else {fWp=1.;return Proton();}
283 //4)----------------------400-450 Mev/c -------------
284 if ( pm<=fcut[4][0] ){
285 if( q<fCutKaTune*fCutKa->Eval(pm) )
286 { fWpi=1.;return Pion(); }
288 { if( q<fCutPr->Eval(pm) )
289 {fWk=1.;return Kaon();} else {fWp=1.;return Proton(); }
291 //5)----------------------450-500 Mev/c -------------
292 if ( pm<=fcut[5][0] ){
293 if ( q>fCutPr->Eval(pm) )
294 {fWp=1.;return Proton();} else {return Wpik(5,q);}}
295 //6)----------------------500-550 Mev/c -------------
296 if ( pm<=fcut[6][0] ){
297 if ( q>fCutPr->Eval(pm) )
298 {fWp=1.;return Proton();} else {return Wpik(6,q);}}
299 //7)----------------------550-600 Mev/c -------------
300 if ( pm<=fcut[7][0] ){
301 if ( q>fCutPr->Eval(pm) )
302 {fWp=1.;return Proton();} else {return Wpik(7,q);}}
303 //8)----------------------600-650 Mev/c -------------
304 if ( pm<=fcut[8][0] ){
305 if ( q>fCutPrTune*fCutPr->Eval(pm) ){fWp=1.;return Proton();}}
306 else {return Wpik(8,q);};
307 //9)----------------------650-730 Mev/c -------------
308 if ( pm<=fcut[9][0] ){
309 if ( q>fCutPrTune*fCutPr->Eval(pm) ){fWp=1.;return Proton();}
310 else {return Wpik(9,q);}}
311 //10)----------------------730-830 Mev/c -------------
312 if( pm<=fcut[10][0] ){
313 if ( q>fCutPrTune*fCutPr->Eval(pm) ){fWp=1.;return Proton();}}
314 else {return Wpik(10,q);};
315 //11)----------------------830-930 Mev/c -------------
316 if( pm<=fcut[11][0] ){ return Wpikp(11,q); }
317 //12)----------------------930-1030 Mev/c -------------
318 if( pm<=fcut[12][0] )
319 { return Wpikp(12,q); };
323 //-----------------------------------------------------------
324 void AliTPCPid::SetCut(Int_t n,Float_t pm,Float_t pilo,Float_t pihi,
325 Float_t klo,Float_t khi,Float_t plo,Float_t phi)
339 //------------------------------------------------------------
340 void AliTPCPid::SetVec(Int_t ntrack,TVector info) const
345 TClonesArray& arr=*trs;
346 new( arr[ntrack] ) TVector(info);
348 //-----------------------------------------------------------
349 TVector* AliTPCPid::GetVec(Int_t ntrack) const
354 TClonesArray& arr=*trs;
355 return (TVector*)arr[ntrack];
357 //-----------------------------------------------------------
358 void AliTPCPid::SetEdep(Int_t track,Float_t Edep)
364 if( ((TVector*)trs->At(track))->IsValid() )
365 {TVector yy( *((TVector*)trs->At(track)) );xx=yy; }
366 Int_t j=(Int_t)xx(0); if(j>4)return;
367 xx(++j)=Edep;xx(0)=j;
368 TClonesArray &arr=*trs;
369 new(arr[track])TVector(xx);
371 //-----------------------------------------------------------
372 void AliTPCPid::SetPmom(Int_t track,Float_t Pmom)
375 // set part. momentum
378 if( ((TVector*)trs->At(track))->IsValid() )
379 {TVector yy( *((TVector*)trs->At(track)) );xx=yy; }
381 TClonesArray &arr=*trs;
382 new(arr[track])TVector(xx);
384 //-----------------------------------------------------------
385 void AliTPCPid::SetPcod(Int_t track,Int_t partcode)
391 if( ((TVector*)trs->At(track))->IsValid() )
392 {TVector yy( *((TVector*)trs->At(track)) );xx=yy; }
394 {xx(11)=partcode; fmxtrs++;
395 TClonesArray &arr=*trs;
396 new(arr[track])TVector(xx);
399 //-----------------------------------------------------------
400 void AliTPCPid::PrintPID(Int_t track)
405 cout<<fmxtrs<<" tracks in AliITSPid obj."<<endl;
406 if( ((TVector*)trs->At(track))->IsValid() )
407 {TVector xx( *((TVector*)trs->At(track)) );
411 {cout<<"No data for track "<<track<<endl;return;}
413 //-----------------------------------------------------------
414 void AliTPCPid::Tab(void)
419 if(trs->GetEntries()==0){cout<<"No entries in TAB"<<endl;return;}
420 cout<<"------------------------------------------------------------------------"<<endl;
421 cout<<"Nq"<<" q1 "<<" q2 "<<" q3 "<<" q4 "<<" q5 "<<
422 " Qtrm " <<" Wpi "<<" Wk "<<" Wp "<<"Pmom "<<endl;
423 cout<<"------------------------------------------------------------------------"<<endl;
424 for(Int_t i=0;i<trs->GetEntries();i++)
426 TVector xx( *((TVector*)trs->At(i)) );
427 if( xx.IsValid() && xx(0)>0 )
432 xx(6)=(this->Qtrm(i));
437 // 2)Calculate Wpi,Wk,Wp
438 this->GetPcode(xx(6),xx(10)/1000.);
445 for(Int_t j=1;j<11;j++){
446 cout.width(7);cout.precision(5);cout<<xx(j);
450 // 4)Update data in TVector
451 TClonesArray &arr=*trs;
452 new(arr[i])TVector(xx);
455 {/*cout<<"No data for track "<<i<<endl;*/}
456 }// End loop for tracks
458 void AliTPCPid::Reset(void)
463 for(Int_t i=0;i<trs->GetEntries();i++){
465 TClonesArray &arr=*trs;
466 new(arr[i])TVector(xx);
469 //-----------------------------------------------------------
470 AliTPCPid::AliTPCPid(Int_t ntrack):TObject(),
489 trs = new TClonesArray("TVector",ntrack);
490 TClonesArray &arr=*trs;
491 for(Int_t i=0;i<ntrack;i++)new(arr[i])TVector(0,11);
494 //fCutKa = new TF1("fkaons","[0]/x/x+[1]",0.1,1.2);
495 //fCutPr = new TF1("fprotons","[0]/x/x +[1]",0.2,1.2);
498 TF1 frmska("x_frmska","1.46-7.82*x+16.78*x^2-15.53*x^3+5.24*x^4 ",
500 fCutKa = new TF1("fkaons",
501 "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",
503 fCutPr = new TF1("fprotons",
504 "0.83*(15.32-56.094*x+89.962*x^2-66.1856*x^3+18.4052*x^4)",
506 fCutKaTune=1.1; // 0.92;
507 fCutPrTune=1.0; //0.80;
510 // Ncut Pmom pilo pihi klo khi plo phi
511 // fcut[j] [0] [1] [2] [3] [4] [5] [6]
512 //----------------------------------------------------------------
513 SetCut( 1, 0.120, 0. , 0. , kinf , kinf , kinf , kinf );
514 SetCut( 2, 0.200, 0. , 6.0 , 6.0 , kinf , kinf , kinf ); //120-200
515 SetCut( 3, 0.400, 0. , 3.5 , 3.5 , 9.0 , 9.0 , kinf ); //200-400
516 SetCut( 4, 0.450, 0. , 1.9 , 1.9 , 4.0 , 4.0 , kinf ); //400-450
517 //----------------------------------------------------------------
518 SetCut( 5, 0.500, 0.976, 0.108, 1.484 , 0.159 , 3.5 , kinf ); //450-500
519 SetCut( 6, 0.550, 0.979, 0.108, 1.376 , 0.145 , 3.0 , kinf ); //500-550
520 //----------------------------------------------------------------
521 SetCut( 7, 0.600, 0.984, 0.111, 1.295 , 0.146 , 2.7 , kinf ); //550-600
522 SetCut( 8, 0.650, 0.989, 0.113, 1.239 , 0.141 , 2.5 , kinf ); //600-650
523 SetCut( 9, 0.730, 0.995, 0.109, 1.172 , 0.132 , 2.0 , kinf ); //650-730
524 //----------------------------------------------------------------
525 SetCut( 10, 0.830, 1.008, 0.116, 1.117 , 0.134 , 1.703, 0.209 ); //730-830
526 SetCut( 11, 0.930, 1.019, 0.115, 1.072 , 0.121 , 1.535, 0.215 ); //830-930
527 SetCut( 12, 1.230, 1.035, 0.117, 1.053 , 0.140 ,1.426, 0.270); //930-1030
528 //------------------------ pi,K ---------------------
529 faprob[0][0]=33219.; faprob[1][0]=1971.; // faprob[0][i] - pions
530 faprob[0][1]=28828.; faprob[1][1]=1973.; // faprob[1][i] - kaons
531 //---------------------------------------------------
532 faprob[0][2]=24532.; faprob[1][2]=1932.; faprob[2][2]=1948.;
533 faprob[0][3]=20797.; faprob[1][3]=1823.; faprob[2][3]=1970.;
534 faprob[0][4]=27017.; faprob[1][4]=2681.; faprob[2][4]=2905.;
535 //------------------------ pi,K,p -------------------
536 faprob[0][5]= 24563.; faprob[1][5]=2816.; faprob[2][5]=3219.;
537 faprob[0][6]= 16877.; faprob[1][6]=2231.; faprob[2][6]=2746.;
538 faprob[0][7]= 11557.; faprob[1][7]=1681; faprob[2][7]=2190.;
542 //-----------------------------------------------------------