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"
29 // Correction 13.01.2003 Z.S.,Dubna
31 //------------------------------------------------------------
32 // pid class by B. Batyunya
33 // stupid corrections by M.K.
35 //_______________________________________________________
36 //________________________________________________________
37 AliTPCPid::AliTPCPid( const AliTPCPid& r):TObject(r),
56 // dummy copy constructor
58 Float_t AliTPCPid::Qcorr(Float_t xc)
65 fcorr=( 0.766 +0.9692*xc -1.267*xc*xc )*( 1.-TMath::Exp(-xc*64.75) );
66 if(fcorr<=0.1)fcorr=0.1;
69 //__________________________________________________________
70 AliTPCPid & AliTPCPid::operator =(const AliTPCPid & param)
73 // assignment operator - dummy
76 fSigmin=param.fSigmin;
80 //-----------------------------------------------------------
81 Float_t AliTPCPid::Qtrm(Int_t track) const
84 // dummy comment (Boris!!!)
86 TVector q(*( this->GetVec(track) ));
91 Int_t nl=0; for(Int_t i=0;i<ml;i++){if(q(i)>fSigmin){vf[nl]=q(i+1);nl++;}}
94 case 1:q(6)=q(1); break;
95 case 2:q(6)=(q(1)+q(2))/2.; break;
97 for(int fi=0;fi<2;fi++){
99 do{ swap=0; float qmin=vf[fi];
100 for(int j=fi+1;j<nl;j++)
101 if(qmin>vf[j]){qmin=vf[j];vf[j]=vf[fi];vf[fi]=qmin;swap=1;};
104 q(6)= (vf[0]+vf[1])/2.;
107 for(Int_t i=0;i<nl;i++){q(i+1)=vf[i];} this->SetVec(track,q);
109 }// --- End AliTPCPid::Qtrm ---
111 Float_t AliTPCPid::Qtrm(Float_t qarr[6],Int_t narr)
114 Float_t q[6],qm,qmin;
116 if(narr>0&&narr<7){ml=narr;}else{return 0;};
117 nl=0; for(Int_t i=0;i<ml;i++){if(qarr[i]>fSigmin){q[nl]=qarr[i];nl++;}}
120 case 1:qm=q[0]; break;
121 case 2:qm=(q[0]+q[1])/2.; break;
124 for(int fi=0;fi<2;fi++){
125 do{ swap=0; qmin=q[fi];
126 for(int j=fi+1;j<nl;j++)
127 if(qmin>q[j]){qmin=q[j];q[j]=q[fi];q[fi]=qmin;swap=1;};
134 }// --- End AliTPCPid::Qtrm ---
136 Int_t AliTPCPid::Wpik(Int_t nc,Float_t q)
141 Float_t qmpi,qmk,sigpi,sigk,dpi,dk,ppi,pk;
147 appi = faprob[0][nc-5];
148 apk = faprob[1][nc-5];
150 cout<<"qmpi,sigpi,qmk,sigk="<<qmpi<<" "<<sigpi<<" "<<qmk<<" "<<sigk<<endl;
151 cout<<"appi,apk="<<appi<<","<<apk<<endl;
153 Float_t dqpi=(q-qmpi)/sigpi;
154 Float_t dqk =(q-qmk )/sigk;
155 dpi =TMath::Abs(dqpi);
157 Double_t dn=appi*TMath::Gaus(q,qmpi,sigpi)+apk*TMath::Gaus(q,qmk,sigk);
159 ppi=appi*TMath::Gaus(q,qmpi,sigpi)/dn;
160 pk = apk*TMath::Gaus(q,qmk, sigk )/dn;
161 }else{fWpi=1;return Pion();}
162 Float_t rpik=ppi/(pk+0.0000001);
164 cout<<"q,dqpi,dqk, Wpik: ppi,pk,rpik="
165 <<q<<" "<<dqpi<<" "<<dqk<<" "<<ppi<<" "<<pk<<" "<<rpik<<endl;
167 fWp=0.; fWpi=ppi; fWk=pk;
168 if( pk>ppi){return Kaon();}else{return Pion();}
170 //-----------------------------------------------------------
171 Int_t AliTPCPid::Wpikp(Int_t nc,Float_t q)
176 Float_t qmpi,qmk,qmp,sigpi,sigk,sigp,ppi,pk,pp;
177 Float_t appi,apk,app;
186 //appi = apk = app = 1.;
187 appi = faprob[0][nc-5];
188 apk = faprob[1][nc-5];
189 app = faprob[2][nc-5];
191 Double_t dn= appi*TMath::Gaus(q,qmpi,sigpi)
192 +apk*TMath::Gaus(q,qmk,sigk)+app*TMath::Gaus(q,qmp,sigp);
194 ppi=appi*TMath::Gaus(q,qmpi,sigpi)/dn;
195 pk = apk*TMath::Gaus(q,qmk, sigk )/dn;
196 pp = app*TMath::Gaus(q,qmp, sigp )/dn;
198 else{fWpi=1;return Pion();}
199 fWp=pp; fWpi=ppi; fWk=pk;
201 cout<<" Wpikp: mid,sig pi,k,p="<<qmpi<<" "<<sigpi<<"; "<<qmk<<" "<<sigk<<"; "
202 <<qmp<<" "<<sigp<<"; "<<endl;
203 cout<<" faprob: "<<appi<<" "<<apk<<" "<<app<<endl;
204 cout<<" ppi,pk,pp="<<ppi<<" "<<pk<<" "<<pp<<endl;
206 if( ppi>pk&&ppi>pp ) { return Pion(); }
207 if(pk>pp){return Kaon();}else{return Proton();}
209 //-----------------------------------------------------------
210 Int_t AliTPCPid::GetPcode(TClonesArray* /*rps*/,Float_t /*pm*/) const
217 //-----------------------------------------------------------
218 Int_t AliTPCPid::GetPcode(AliTPCtrack *track)
223 Double_t xk,par[5]; track->GetExternalParameters(xk,par);
224 Float_t phi=TMath::ASin(par[2]) + track->GetAlpha();
225 if (phi<-TMath::Pi()) phi+=2*TMath::Pi();
226 if (phi>=TMath::Pi()) phi-=2*TMath::Pi();
227 Float_t lam=TMath::ATan(par[3]);
228 Float_t pt1=TMath::Abs(par[4]);
229 Float_t mom=1./(pt1*TMath::Cos(lam));
230 Float_t dedx=track->GetdEdx();
231 Int_t pcode=GetPcode(dedx/40.,mom);
232 cout<<"TPCtrack dedx,mom,pcode="<<dedx<<","<<mom<<","<<pcode<<endl;
233 return pcode?pcode:211;
236 //-----------------------------------------------------------
237 Int_t AliTPCPid::GetPcode(AliKalmanTrack *track)
242 if(track==0)return 0;
243 // track->Propagate(track->GetAlpha(),3.,0.1/65.19*1.848,0.1*1.848);
244 track->PropagateTo(3.,0.0028,65.19);
245 track->PropagateToVertex();
246 Double_t xk,par[5]; track->GetExternalParameters(xk,par);
247 Float_t lam=TMath::ATan(par[3]);
248 Float_t pt1=TMath::Abs(par[4]);
250 if( (pt1*TMath::Cos(lam))!=0. ){ mom=1./(pt1*TMath::Cos(lam)); }else{mom=0.;};
251 Float_t dedx=track->GetPIDsignal();
252 cout<<"lam,pt1,mom,dedx="<<lam<<","<<pt1<<","<<mom<<","<<dedx<<endl;
253 Int_t pcode=GetPcode(dedx,mom);
254 cout<<"ITS V2 dedx,mom,pcode="<<dedx<<","<<mom<<","<<pcode<<endl;
255 return pcode?pcode:211;
258 //-----------------------------------------------------------
259 Int_t AliTPCPid::GetPcode(Float_t q,Float_t pm)
264 fWpi=fWk=fWp=0.; fPcode=0;
265 //1)---------------------- 0-120 MeV/c --------------
266 if ( pm<=fcut[1][0] )
267 { fWpi=1.; return Pion(); }
268 //2)----------------------120-200 Mev/c ( 29.7.2002 ) -------------
269 if ( pm<=fcut[2][0] )
270 { if( q<fCutKa->Eval(pm) ){fWpi=1.; return Pion(); }
271 else {fWk =1.; return Kaon();} }
272 //3)----------------------200-400 Mev/c -------------
273 if ( pm<=fcut[3][0] ){
274 if( q<fCutKa->Eval(pm) )
275 { fWpi=1.;return Pion(); }
277 { if ( q<=fCutPr->Eval(pm) )
278 {fWk=1.;return Kaon();}
279 else {fWp=1.;return Proton();}
281 //4)----------------------400-450 Mev/c -------------
282 if ( pm<=fcut[4][0] ){
283 if( q<fCutKaTune*fCutKa->Eval(pm) )
284 { fWpi=1.;return Pion(); }
286 { if( q<fCutPr->Eval(pm) )
287 {fWk=1.;return Kaon();} else {fWp=1.;return Proton(); }
289 //5)----------------------450-500 Mev/c -------------
290 if ( pm<=fcut[5][0] ){
291 if ( q>fCutPr->Eval(pm) )
292 {fWp=1.;return Proton();} else {return Wpik(5,q);}}
293 //6)----------------------500-550 Mev/c -------------
294 if ( pm<=fcut[6][0] ){
295 if ( q>fCutPr->Eval(pm) )
296 {fWp=1.;return Proton();} else {return Wpik(6,q);}}
297 //7)----------------------550-600 Mev/c -------------
298 if ( pm<=fcut[7][0] ){
299 if ( q>fCutPr->Eval(pm) )
300 {fWp=1.;return Proton();} else {return Wpik(7,q);}}
301 //8)----------------------600-650 Mev/c -------------
302 if ( pm<=fcut[8][0] ){
303 if ( q>fCutPrTune*fCutPr->Eval(pm) ){fWp=1.;return Proton();}}
304 else {return Wpik(8,q);};
305 //9)----------------------650-730 Mev/c -------------
306 if ( pm<=fcut[9][0] ){
307 if ( q>fCutPrTune*fCutPr->Eval(pm) ){fWp=1.;return Proton();}
308 else {return Wpik(9,q);}}
309 //10)----------------------730-830 Mev/c -------------
310 if( pm<=fcut[10][0] ){
311 if ( q>fCutPrTune*fCutPr->Eval(pm) ){fWp=1.;return Proton();}}
312 else {return Wpik(10,q);};
313 //11)----------------------830-930 Mev/c -------------
314 if( pm<=fcut[11][0] ){ return Wpikp(11,q); }
315 //12)----------------------930-1030 Mev/c -------------
316 if( pm<=fcut[12][0] )
317 { return Wpikp(12,q); };
321 //-----------------------------------------------------------
322 void AliTPCPid::SetCut(Int_t n,Float_t pm,Float_t pilo,Float_t pihi,
323 Float_t klo,Float_t khi,Float_t plo,Float_t phi)
337 //------------------------------------------------------------
338 void AliTPCPid::SetVec(Int_t ntrack,TVector info) const
343 TClonesArray& arr=*trs;
344 new( arr[ntrack] ) TVector(info);
346 //-----------------------------------------------------------
347 TVector* AliTPCPid::GetVec(Int_t ntrack) const
352 TClonesArray& arr=*trs;
353 return (TVector*)arr[ntrack];
355 //-----------------------------------------------------------
356 void AliTPCPid::SetEdep(Int_t track,Float_t Edep)
362 if( ((TVector*)trs->At(track))->IsValid() )
363 {TVector yy( *((TVector*)trs->At(track)) );xx=yy; }
364 Int_t j=(Int_t)xx(0); if(j>4)return;
365 xx(++j)=Edep;xx(0)=j;
366 TClonesArray &arr=*trs;
367 new(arr[track])TVector(xx);
369 //-----------------------------------------------------------
370 void AliTPCPid::SetPmom(Int_t track,Float_t Pmom)
373 // set part. momentum
376 if( ((TVector*)trs->At(track))->IsValid() )
377 {TVector yy( *((TVector*)trs->At(track)) );xx=yy; }
379 TClonesArray &arr=*trs;
380 new(arr[track])TVector(xx);
382 //-----------------------------------------------------------
383 void AliTPCPid::SetPcod(Int_t track,Int_t partcode)
389 if( ((TVector*)trs->At(track))->IsValid() )
390 {TVector yy( *((TVector*)trs->At(track)) );xx=yy; }
392 {xx(11)=partcode; fmxtrs++;
393 TClonesArray &arr=*trs;
394 new(arr[track])TVector(xx);
397 //-----------------------------------------------------------
398 void AliTPCPid::PrintPID(Int_t track)
403 cout<<fmxtrs<<" tracks in AliITSPid obj."<<endl;
404 if( ((TVector*)trs->At(track))->IsValid() )
405 {TVector xx( *((TVector*)trs->At(track)) );
409 {cout<<"No data for track "<<track<<endl;return;}
411 //-----------------------------------------------------------
412 void AliTPCPid::Tab(void)
417 if(trs->GetEntries()==0){cout<<"No entries in TAB"<<endl;return;}
418 cout<<"------------------------------------------------------------------------"<<endl;
419 cout<<"Nq"<<" q1 "<<" q2 "<<" q3 "<<" q4 "<<" q5 "<<
420 " Qtrm " <<" Wpi "<<" Wk "<<" Wp "<<"Pmom "<<endl;
421 cout<<"------------------------------------------------------------------------"<<endl;
422 for(Int_t i=0;i<trs->GetEntries();i++)
424 TVector xx( *((TVector*)trs->At(i)) );
425 if( xx.IsValid() && xx(0)>0 )
430 xx(6)=(this->Qtrm(i));
435 // 2)Calculate Wpi,Wk,Wp
436 this->GetPcode(xx(6),xx(10)/1000.);
443 for(Int_t j=1;j<11;j++){
444 cout.width(7);cout.precision(5);cout<<xx(j);
448 // 4)Update data in TVector
449 TClonesArray &arr=*trs;
450 new(arr[i])TVector(xx);
453 {/*cout<<"No data for track "<<i<<endl;*/}
454 }// End loop for tracks
456 void AliTPCPid::Reset(void)
461 for(Int_t i=0;i<trs->GetEntries();i++){
463 TClonesArray &arr=*trs;
464 new(arr[i])TVector(xx);
467 //-----------------------------------------------------------
468 AliTPCPid::AliTPCPid(Int_t ntrack):TObject(),
487 trs = new TClonesArray("TVector",ntrack);
488 TClonesArray &arr=*trs;
489 for(Int_t i=0;i<ntrack;i++)new(arr[i])TVector(0,11);
492 //fCutKa = new TF1("fkaons","[0]/x/x+[1]",0.1,1.2);
493 //fCutPr = new TF1("fprotons","[0]/x/x +[1]",0.2,1.2);
496 TF1 frmska("x_frmska","1.46-7.82*x+16.78*x^2-15.53*x^3+5.24*x^4 ",
498 fCutKa = new TF1("fkaons",
499 "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",
501 fCutPr = new TF1("fprotons",
502 "0.83*(15.32-56.094*x+89.962*x^2-66.1856*x^3+18.4052*x^4)",
504 fCutKaTune=1.1; // 0.92;
505 fCutPrTune=1.0; //0.80;
508 // Ncut Pmom pilo pihi klo khi plo phi
509 // fcut[j] [0] [1] [2] [3] [4] [5] [6]
510 //----------------------------------------------------------------
511 SetCut( 1, 0.120, 0. , 0. , kinf , kinf , kinf , kinf );
512 SetCut( 2, 0.200, 0. , 6.0 , 6.0 , kinf , kinf , kinf ); //120-200
513 SetCut( 3, 0.400, 0. , 3.5 , 3.5 , 9.0 , 9.0 , kinf ); //200-400
514 SetCut( 4, 0.450, 0. , 1.9 , 1.9 , 4.0 , 4.0 , kinf ); //400-450
515 //----------------------------------------------------------------
516 SetCut( 5, 0.500, 0.976, 0.108, 1.484 , 0.159 , 3.5 , kinf ); //450-500
517 SetCut( 6, 0.550, 0.979, 0.108, 1.376 , 0.145 , 3.0 , kinf ); //500-550
518 //----------------------------------------------------------------
519 SetCut( 7, 0.600, 0.984, 0.111, 1.295 , 0.146 , 2.7 , kinf ); //550-600
520 SetCut( 8, 0.650, 0.989, 0.113, 1.239 , 0.141 , 2.5 , kinf ); //600-650
521 SetCut( 9, 0.730, 0.995, 0.109, 1.172 , 0.132 , 2.0 , kinf ); //650-730
522 //----------------------------------------------------------------
523 SetCut( 10, 0.830, 1.008, 0.116, 1.117 , 0.134 , 1.703, 0.209 ); //730-830
524 SetCut( 11, 0.930, 1.019, 0.115, 1.072 , 0.121 , 1.535, 0.215 ); //830-930
525 SetCut( 12, 1.230, 1.035, 0.117, 1.053 , 0.140 ,1.426, 0.270); //930-1030
526 //------------------------ pi,K ---------------------
527 faprob[0][0]=33219.; faprob[1][0]=1971.; // faprob[0][i] - pions
528 faprob[0][1]=28828.; faprob[1][1]=1973.; // faprob[1][i] - kaons
529 //---------------------------------------------------
530 faprob[0][2]=24532.; faprob[1][2]=1932.; faprob[2][2]=1948.;
531 faprob[0][3]=20797.; faprob[1][3]=1823.; faprob[2][3]=1970.;
532 faprob[0][4]=27017.; faprob[1][4]=2681.; faprob[2][4]=2905.;
533 //------------------------ pi,K,p -------------------
534 faprob[0][5]= 24563.; faprob[1][5]=2816.; faprob[2][5]=3219.;
535 faprob[0][6]= 16877.; faprob[1][6]=2231.; faprob[2][6]=2746.;
536 faprob[0][7]= 11557.; faprob[1][7]=1681; faprob[2][7]=2190.;
540 //-----------------------------------------------------------