TPC/AliTPCPid.cxx

   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 /*
  17 $Log$
  18 Revision 1.3  2003/03/04 07:36:15  kowal2
  19 Logs added
  20
  21 */
  22
  23 #include "AliTPCPid.h"
  24 #include "TMath.h"
  25 //#include "AliITSIOTrack.h"
  26 #include "Riostream.h"
  27 ClassImp(AliTPCPid)
  28 // Correction 13.01.2003 Z.S.,Dubna
  29 //            22.01.2003
  30 //------------------------------------------------------------
  31 Float_t AliTPCPid::qcorr(Float_t xc)
  32 {
  33     assert(0);
  34   Float_t fcorr;
  35   fcorr=( 0.766 +0.9692*xc -1.267*xc*xc )*( 1.-TMath::Exp(-xc*64.75) );
  36   if(fcorr<=0.1)fcorr=0.1;
  37 return qtot/fcorr;
  38 }
  39 //-----------------------------------------------------------
  40 Float_t AliTPCPid::qtrm(Int_t track)
  41 {
  42     TVector q(*( this->GetVec(track)  ));
  43     Int_t ml=(Int_t)q(0);
  44     if(ml<1)return 0.;
  45     if(ml>6)ml=6;
  46     float vf[6];
  47     Int_t nl=0; for(Int_t i=0;i<ml;i++){if(q(i)>fSigmin){vf[nl]=q(i+1);nl++;}}
  48     if(nl==0)return 0.;
  49     switch(nl){
  50       case  1:q(6)=q(1); break;
  51       case  2:q(6)=(q(1)+q(2))/2.; break;
  52       default:
  53         for(int fi=0;fi<2;fi++){
  54           Int_t swap;
  55           do{ swap=0; float qmin=vf[fi];
  56           for(int j=fi+1;j<nl;j++)
  57             if(qmin>vf[j]){qmin=vf[j];vf[j]=vf[fi];vf[fi]=qmin;swap=1;};
  58           }while(swap==1);
  59         }
  60         q(6)= (vf[0]+vf[1])/2.;
  61         break;
  62     }
  63     for(Int_t i=0;i<nl;i++){q(i+1)=vf[i];} this->SetVec(track,q);
  64     return (q(6));
  65 }// --- End AliTPCPid::qtrm ---
  66
  67 Float_t AliTPCPid::qtrm(Float_t qarr[6],Int_t narr)
  68 {
  69   //..................
  70   Float_t q[6],qm,qmin;
  71   Int_t nl,ml;
  72   if(narr>0&&narr<7){ml=narr;}else{return 0;};
  73   nl=0; for(Int_t i=0;i<ml;i++){if(qarr[i]>fSigmin){q[nl]=qarr[i];nl++;}}
  74   if(nl==0)return 0.;
  75     switch(nl){
  76       case  1:qm=q[0]; break;
  77       case  2:qm=(q[0]+q[1])/2.; break;
  78       default:
  79         Int_t swap;
  80         for(int fi=0;fi<2;fi++){
  81           do{ swap=0; qmin=q[fi];
  82           for(int j=fi+1;j<nl;j++)
  83             if(qmin>q[j]){qmin=q[j];q[j]=q[fi];q[fi]=qmin;swap=1;};
  84           }while(swap==1);
  85         }
  86         qm= (q[0]+q[1])/2.;
  87         break;
  88     }
  89     return qm;
  90 }// --- End AliTPCPid::qtrm  ---
  91
  92 Int_t   AliTPCPid::wpik(Int_t nc,Float_t q)
  93 {
  94     Float_t qmpi,qmk,sigpi,sigk,dpi,dk,ppi,pk;
  95     Float_t appi,apk;
  96     qmpi =cut[nc][1];
  97     sigpi=cut[nc][2];
  98     qmk  =cut[nc][3];
  99     sigk =cut[nc][4];
 100     appi = aprob[0][nc-5];
 101     apk  = aprob[1][nc-5];
 102     if( !fSilent ){
 103     cout<<"qmpi,sigpi,qmk,sigk="<<qmpi<<"  "<<sigpi<<"  "<<qmk<<"  "<<sigk<<endl;
 104     cout<<"appi,apk="<<appi<<","<<apk<<endl;
 105     }
 106     Float_t dqpi=(q-qmpi)/sigpi;
 107     Float_t dqk =(q-qmk )/sigk;
 108     dpi =TMath::Abs(dqpi);
 109     dk  =TMath::Abs(dqk);
 110     Double_t dn=appi*TMath::Gaus(q,qmpi,sigpi)+apk*TMath::Gaus(q,qmk,sigk);
 111     if(dn>0.){
 112       ppi=appi*TMath::Gaus(q,qmpi,sigpi)/dn;
 113       pk = apk*TMath::Gaus(q,qmk, sigk )/dn;
 114     }else{fWpi=1;return pion();}
 115     Float_t rpik=ppi/(pk+0.0000001);
 116     if( !fSilent )
 117         cout<<"q,dqpi,dqk, wpik: ppi,pk,rpik="
 118         <<q<<"  "<<dqpi<<"  "<<dqk<<"  "<<ppi<<"  "<<pk<<"  "<<rpik<<endl;
 119
 120     fWp=0.; fWpi=ppi; fWk=pk;
 121     if( pk>ppi){return kaon();}else{return pion();}
 122 }
 123 //-----------------------------------------------------------
 124 //inline
 125 Int_t   AliTPCPid::wpikp(Int_t nc,Float_t q)
 126 {
 127    Float_t qmpi,qmk,qmp,sigpi,sigk,sigp,ppi,pk,pp;
 128    Float_t appi,apk,app;
 129
 130     qmpi =cut[nc][1];
 131     sigpi=cut[nc][2];
 132     qmk  =cut[nc][3];
 133     sigk =cut[nc][4];
 134     qmp  =cut[nc][5];
 135     sigp =cut[nc][6];
 136
 137     //appi = apk = app = 1.;
 138     appi = aprob[0][nc-5];
 139     apk  = aprob[1][nc-5];
 140     app  = aprob[2][nc-5];
 141
 142     Double_t dn= appi*TMath::Gaus(q,qmpi,sigpi)
 143       +apk*TMath::Gaus(q,qmk,sigk)+app*TMath::Gaus(q,qmp,sigp);
 144     if(dn>0.){
 145     ppi=appi*TMath::Gaus(q,qmpi,sigpi)/dn;
 146     pk = apk*TMath::Gaus(q,qmk, sigk )/dn;
 147     pp = app*TMath::Gaus(q,qmp, sigp )/dn;
 148      }
 149     else{fWpi=1;return pion();}
 150     fWp=pp; fWpi=ppi; fWk=pk;
 151     if( !fSilent ){
 152 cout<<" wpikp: mid,sig pi,k,p="<<qmpi<<" "<<sigpi<<";   "<<qmk<<" "<<sigk<<";   "
 153     <<qmp<<" "<<sigp<<"; "<<endl;
 154 cout<<" aprob: "<<appi<<"  "<<apk<<"  "<<app<<endl;
 155 cout<<" ppi,pk,pp="<<ppi<<"  "<<pk<<"  "<<pp<<endl;
 156      }
 157     if( ppi>pk&&ppi>pp )  { return pion(); }
 158     if(pk>pp){return kaon();}else{return proton();}
 159 }
 160 //-----------------------------------------------------------
 161 Int_t   AliTPCPid::GetPcode(TClonesArray* rps,Float_t pm)
 162 {
 163     return 0;
 164 }
 165 //-----------------------------------------------------------
 166 Int_t   AliTPCPid::GetPcode(AliTPCtrack *track)
 167 {
 168       Double_t xk,par[5]; track->GetExternalParameters(xk,par);
 169       Float_t phi=TMath::ASin(par[2]) + track->GetAlpha();
 170       if (phi<-TMath::Pi()) phi+=2*TMath::Pi();
 171       if (phi>=TMath::Pi()) phi-=2*TMath::Pi();
 172       Float_t lam=TMath::ATan(par[3]);
 173       Float_t pt_1=TMath::Abs(par[4]);
 174       Float_t mom=1./(pt_1*TMath::Cos(lam));
 175       Float_t dedx=track->GetdEdx();
 176     Int_t pcode=GetPcode(dedx/40.,mom);
 177     cout<<"TPCtrack dedx,mom,pcode="<<dedx<<","<<mom<<","<<pcode<<endl;
 178     return pcode?pcode:211;
 179     }
 180 //-----------------------------------------------------------
 181 Int_t   AliTPCPid::GetPcode(AliITStrackV2 *track)
 182 {
 183   if(track==0)return 0;
 184   //      track->Propagate(track->GetAlpha(),3.,0.1/65.19*1.848,0.1*1.848);
 185       track->PropagateTo(3.,0.0028,65.19);
 186       track->PropagateToVertex();
 187     Double_t xk,par[5]; track->GetExternalParameters(xk,par);
 188     Float_t lam=TMath::ATan(par[3]);
 189     Float_t pt_1=TMath::Abs(par[4]);
 190     Float_t mom=0.;
 191     if( (pt_1*TMath::Cos(lam))!=0. ){ mom=1./(pt_1*TMath::Cos(lam)); }else{mom=0.;};
 192     Float_t dedx=track->GetdEdx();
 193     cout<<"lam,pt_1,mom,dedx="<<lam<<","<<pt_1<<","<<mom<<","<<dedx<<endl;
 194     Int_t pcode=GetPcode(dedx,mom);
 195     cout<<"ITS V2 dedx,mom,pcode="<<dedx<<","<<mom<<","<<pcode<<endl;
 196 return pcode?pcode:211;
 197 }
 198 //-----------------------------------------------------------
 199 Int_t   AliTPCPid::GetPcode(Float_t q,Float_t pm)
 200 {
 201     fWpi=fWk=fWp=0.;     fPcode=0;
 202 //1)---------------------- 0-120 MeV/c --------------
 203     if ( pm<=cut[1][0] )
 204         { fWpi=1.; return pion(); }
 205 //2)----------------------120-200 Mev/c ( 29.7.2002 ) -------------
 206     if ( pm<=cut[2][0] )
 207         { if( q<fCutKa->Eval(pm) ){fWpi=1.; return pion(); }
 208                              else {fWk =1.; return  kaon();} }
 209 //3)----------------------200-400 Mev/c -------------
 210     if ( pm<=cut[3][0] )
 211         if( q<fCutKa->Eval(pm) )
 212                 { fWpi=1.;return pion(); }
 213              else
 214                 { if ( q<=fCutPr->Eval(pm) )
 215                              {fWk=1.;return kaon();}
 216                         else {fWp=1.;return proton();}
 217                 }
 218 //4)----------------------400-450 Mev/c -------------
 219     if ( pm<=cut[4][0] )
 220         if( q<fCutKaTune*fCutKa->Eval(pm) )
 221                 { fWpi=1.;return pion(); }
 222             else
 223                 { if( q<fCutPr->Eval(pm) )
 224                   {fWk=1.;return kaon();} else {fWp=1.;return proton(); }
 225                 }
 226 //5)----------------------450-500 Mev/c -------------
 227     if ( pm<=cut[5][0] )
 228         if ( q>fCutPr->Eval(pm) )
 229            {fWp=1.;return proton();} else {return wpik(5,q);};
 230 //6)----------------------500-550 Mev/c -------------
 231     if ( pm<=cut[6][0] )
 232         if ( q>fCutPr->Eval(pm) )
 233            {fWp=1.;return proton();} else {return wpik(6,q);};
 234 //7)----------------------550-600 Mev/c -------------
 235     if ( pm<=cut[7][0] )
 236         if ( q>fCutPr->Eval(pm) )
 237            {fWp=1.;return proton();} else {return wpik(7,q);};
 238 //8)----------------------600-650 Mev/c -------------
 239     if ( pm<=cut[8][0] )
 240       if ( q>fCutPrTune*fCutPr->Eval(pm) ){fWp=1.;return proton();}
 241                                      else {return wpik(8,q);};
 242 //9)----------------------650-730 Mev/c -------------
 243     if ( pm<=cut[9][0] )
 244       if ( q>fCutPrTune*fCutPr->Eval(pm) ){fWp=1.;return proton();}
 245                                      else {return wpik(9,q);};
 246 //10)----------------------730-830 Mev/c -------------
 247     if( pm<=cut[10][0] )
 248       if ( q>fCutPrTune*fCutPr->Eval(pm) ){fWp=1.;return proton();}
 249                                      else {return wpik(10,q);};
 250 //11)----------------------830-930 Mev/c -------------
 251     if( pm<=cut[11][0] ){ return wpikp(11,q); }
 252 //12)----------------------930-1030 Mev/c -------------
 253     if( pm<=cut[12][0] )
 254      { return wpikp(12,q); };
 255
 256     return fPcode;
 257 }
 258 //-----------------------------------------------------------
 259 void    AliTPCPid::SetCut(Int_t n,Float_t pm,Float_t pilo,Float_t pihi,
 260                         Float_t klo,Float_t khi,Float_t plo,Float_t phi)
 261 {
 262     cut[n][0]=pm;
 263     cut[n][1]=pilo;
 264     cut[n][2]=pihi;
 265     cut[n][3]=klo;
 266     cut[n][4]=khi;
 267     cut[n][5]=plo;
 268     cut[n][6]=phi;
 269     return ;
 270 }
 271 //------------------------------------------------------------
 272 void AliTPCPid::SetVec(Int_t ntrack,TVector info)
 273 {
 274 TClonesArray& arr=*trs;
 275     new( arr[ntrack] ) TVector(info);
 276 }
 277 //-----------------------------------------------------------
 278 TVector* AliTPCPid::GetVec(Int_t ntrack)
 279 {
 280 TClonesArray& arr=*trs;
 281     return (TVector*)arr[ntrack];
 282 }
 283 //-----------------------------------------------------------
 284 void AliTPCPid::SetEdep(Int_t track,Float_t Edep)
 285 {
 286     TVector xx(0,11);
 287     if( ((TVector*)trs->At(track))->IsValid() )
 288         {TVector yy( *((TVector*)trs->At(track)) );xx=yy; }
 289     Int_t j=(Int_t)xx(0); if(j>4)return;
 290     xx(++j)=Edep;xx(0)=j;
 291     TClonesArray &arr=*trs;
 292     new(arr[track])TVector(xx);
 293 }
 294 //-----------------------------------------------------------
 295 void AliTPCPid::SetPmom(Int_t track,Float_t Pmom)
 296 {
 297     TVector xx(0,11);
 298     if( ((TVector*)trs->At(track))->IsValid() )
 299         {TVector yy( *((TVector*)trs->At(track)) );xx=yy; }
 300     xx(10)=Pmom;
 301     TClonesArray &arr=*trs;
 302     new(arr[track])TVector(xx);
 303 }
 304 //-----------------------------------------------------------
 305 void AliTPCPid::SetPcod(Int_t track,Int_t partcode)
 306 {
 307     TVector xx(0,11);
 308     if( ((TVector*)trs->At(track))->IsValid() )
 309         {TVector yy( *((TVector*)trs->At(track)) );xx=yy; }
 310     if(xx(11)==0)
 311         {xx(11)=partcode; mxtrs++;
 312         TClonesArray &arr=*trs;
 313         new(arr[track])TVector(xx);
 314         }
 315 }
 316 //-----------------------------------------------------------
 317 void AliTPCPid::Print(Int_t track)
 318 {cout<<mxtrs<<" tracks in AliITSPid obj."<<endl;
 319     if( ((TVector*)trs->At(track))->IsValid() )
 320         {TVector xx( *((TVector*)trs->At(track)) );
 321          xx.Print();
 322          }
 323     else
 324         {cout<<"No data for track "<<track<<endl;return;}
 325 }
 326 //-----------------------------------------------------------
 327 void AliTPCPid::Tab(void)
 328 {
 329 if(trs->GetEntries()==0){cout<<"No entries in TAB"<<endl;return;}
 330 cout<<"------------------------------------------------------------------------"<<endl;
 331 cout<<"Nq"<<"   q1  "<<"   q2  "<<"   q3  "<<"   q4  "<<"   q5   "<<
 332       " Qtrm    "    <<"  Wpi  "<<"  Wk   "<<"  Wp  "<<"Pmom  "<<endl;
 333 cout<<"------------------------------------------------------------------------"<<endl;
 334 for(Int_t i=0;i<trs->GetEntries();i++)
 335 {
 336   TVector xx( *((TVector*)trs->At(i)) );
 337     if( xx.IsValid() && xx(0)>0 )
 338         {
 339             TVector xx( *((TVector*)trs->At(i)) );
 340             if(xx(0)>=2)
 341                 {
 342 //       1)Calculate Qtrm
 343                     xx(6)=(this->qtrm(i));
 344
 345                  }else{
 346                      xx(6)=xx(1);
 347                  }
 348 //       2)Calculate Wpi,Wk,Wp
 349             this->GetPcode(xx(6),xx(10)/1000.);
 350             xx(7)=GetWpi();
 351             xx(8)=GetWk();
 352             xx(9)=GetWp();
 353 //       3)Print table
 354             if(xx(0)>0){
 355                     cout<<xx(0)<<" ";
 356                     for(Int_t j=1;j<11;j++){
 357                         cout.width(7);cout.precision(5);cout<<xx(j);
 358                     }
 359                     cout<<endl;
 360                 }
 361 //        4)Update data in TVector
 362             TClonesArray &arr=*trs;
 363             new(arr[i])TVector(xx);
 364         }
 365     else
 366       {/*cout<<"No data for track "<<i<<endl;*/}
 367 }// End loop for tracks
 368 }
 369 void AliTPCPid::Reset(void)
 370 {
 371   for(Int_t i=0;i<trs->GetEntries();i++){
 372     TVector xx(0,11);
 373     TClonesArray &arr=*trs;
 374     new(arr[i])TVector(xx);
 375   }
 376 }
 377 //-----------------------------------------------------------
 378 AliTPCPid::AliTPCPid(Int_t ntrack)
 379 {
 380     trs = new TClonesArray("TVector",ntrack);
 381     TClonesArray &arr=*trs;
 382     for(Int_t i=0;i<ntrack;i++)new(arr[i])TVector(0,11);
 383     mxtrs=0;
 384
 385     //fCutKa = new TF1("fkaons","[0]/x/x+[1]",0.1,1.2);
 386     //fCutPr = new TF1("fprotons","[0]/x/x +[1]",0.2,1.2);
 387     TF1 *f_rmska = new TF1("x_frmska","1.46-7.82*x+16.78*x^2-15.53*x^3+5.24*x^4 ",
 388                 0.1,1.2);
 389     fCutKa = new TF1("fkaons",
 390            "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",
 391            0.1,1.2);
 392     fCutPr = new TF1("fprotons",
 393                      "0.83*(15.32-56.094*x+89.962*x^2-66.1856*x^3+18.4052*x^4)",
 394                      0.2,1.2);
 395     fCutKaTune=1.1; // 0.92;
 396     fCutPrTune=1.0; //0.80;
 397
 398 const int inf=10;
 399 //         Ncut Pmom   pilo  pihi    klo    khi     plo    phi
 400 //       cut[j] [0]    [1]    [2]    [3]    [4]     [5]    [6]
 401 //----------------------------------------------------------------
 402     SetCut(  1, 0.120,  0.  ,  0.  , inf  , inf   , inf  , inf  );
 403     SetCut(  2, 0.200,  0.  ,  6.0 , 6.0  , inf   , inf  , inf  ); //120-200
 404     SetCut(  3, 0.400,  0.  ,  3.5 , 3.5  , 9.0   , 9.0  , inf  ); //200-400
 405     SetCut(  4, 0.450,  0.  ,  1.9 , 1.9  , 4.0   , 4.0  , inf  ); //400-450
 406 //----------------------------------------------------------------
 407     SetCut(  5, 0.500, 0.976, 0.108, 1.484 , 0.159  , 3.5  , inf  );  //450-500
 408     SetCut(  6, 0.550, 0.979, 0.108, 1.376 , 0.145  , 3.0  , inf  );  //500-550
 409 //----------------------------------------------------------------
 410     SetCut(  7, 0.600, 0.984, 0.111, 1.295 , 0.146 , 2.7  , inf  );   //550-600
 411     SetCut(  8, 0.650, 0.989, 0.113, 1.239 , 0.141 , 2.5  , inf  );   //600-650
 412     SetCut(  9, 0.730, 0.995, 0.109, 1.172 , 0.132 , 2.0  , inf  );   //650-730
 413 //----------------------------------------------------------------
 414     SetCut( 10, 0.830, 1.008, 0.116, 1.117 , 0.134 , 1.703, 0.209 ); //730-830
 415     SetCut( 11, 0.930, 1.019, 0.115, 1.072 , 0.121 , 1.535, 0.215 ); //830-930
 416     SetCut( 12, 1.230, 1.035, 0.117, 1.053 , 0.140  ,1.426, 0.270); //930-1030
 417     //------------------------ pi,K ---------------------
 418     aprob[0][0]=33219.;   aprob[1][0]=1971.;   // aprob[0][i] -    pions
 419     aprob[0][1]=28828.;   aprob[1][1]=1973.; // aprob[1][i] -    kaons
 420     //---------------------------------------------------
 421     aprob[0][2]=24532.;   aprob[1][2]=1932.; aprob[2][2]=1948.;
 422     aprob[0][3]=20797.;   aprob[1][3]=1823.; aprob[2][3]=1970.;
 423     aprob[0][4]=27017.;   aprob[1][4]=2681.; aprob[2][4]=2905.;
 424     //------------------------ pi,K,p -------------------
 425     aprob[0][5]= 24563.;    aprob[1][5]=2816.;  aprob[2][5]=3219.;
 426     aprob[0][6]= 16877.;    aprob[1][6]=2231.;  aprob[2][6]=2746.;
 427     aprob[0][7]= 11557.;    aprob[1][7]=1681;   aprob[2][7]=2190.;
 428
 429     fSilent=kTRUE;
 430 }
 431 //-----------------------------------------------------------
 432
 433
 434