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