TPC/AliTPCPid.cxx

   1 #include "AliTPCPid.h"
   2 #include "TMath.h"
   3 //#include "AliITSIOTrack.h"
   4 #include <iostream.h>
   5 ClassImp(AliTPCPid)
   6 // Correction 13.01.2003 Z.S.,Dubna
   7 //            22.01.2003
   8 //------------------------------------------------------------
   9 Float_t AliTPCPid::qcorr(Float_t xc)
  10 {
  11     assert(0);
  12   Float_t fcorr;
  13   fcorr=( 0.766 +0.9692*xc -1.267*xc*xc )*( 1.-TMath::Exp(-xc*64.75) );
  14   if(fcorr<=0.1)fcorr=0.1;
  15 return qtot/fcorr;
  16 }
  17 //-----------------------------------------------------------
  18 Float_t AliTPCPid::qtrm(Int_t track)
  19 {
  20     TVector q(*( this->GetVec(track)  ));
  21     Int_t ml=(Int_t)q(0);
  22     if(ml<1)return 0.;
  23     if(ml>6)ml=6;
  24     float vf[6];
  25     Int_t nl=0; for(Int_t i=0;i<ml;i++){if(q(i)>fSigmin){vf[nl]=q(i+1);nl++;}}
  26     if(nl==0)return 0.;
  27     switch(nl){
  28       case  1:q(6)=q(1); break;
  29       case  2:q(6)=(q(1)+q(2))/2.; break;
  30       default:
  31         for(int fi=0;fi<2;fi++){
  32           Int_t swap;
  33           do{ swap=0; float qmin=vf[fi];
  34           for(int j=fi+1;j<nl;j++)
  35             if(qmin>vf[j]){qmin=vf[j];vf[j]=vf[fi];vf[fi]=qmin;swap=1;};
  36           }while(swap==1);
  37         }
  38         q(6)= (vf[0]+vf[1])/2.;
  39         break;
  40     }
  41     for(Int_t i=0;i<nl;i++){q(i+1)=vf[i];} this->SetVec(track,q);
  42     return (q(6));
  43 }// --- End AliTPCPid::qtrm ---
  44
  45 Float_t AliTPCPid::qtrm(Float_t qarr[6],Int_t narr)
  46 {
  47   //..................
  48   Float_t q[6],qm,qmin;
  49   Int_t nl,ml;
  50   if(narr>0&&narr<7){ml=narr;}else{return 0;};
  51   nl=0; for(Int_t i=0;i<ml;i++){if(qarr[i]>fSigmin){q[nl]=qarr[i];nl++;}}
  52   if(nl==0)return 0.;
  53     switch(nl){
  54       case  1:qm=q[0]; break;
  55       case  2:qm=(q[0]+q[1])/2.; break;
  56       default:
  57         Int_t swap;
  58         for(int fi=0;fi<2;fi++){
  59           do{ swap=0; qmin=q[fi];
  60           for(int j=fi+1;j<nl;j++)
  61             if(qmin>q[j]){qmin=q[j];q[j]=q[fi];q[fi]=qmin;swap=1;};
  62           }while(swap==1);
  63         }
  64         qm= (q[0]+q[1])/2.;
  65         break;
  66     }
  67     return qm;
  68 }// --- End AliTPCPid::qtrm  ---
  69
  70 Int_t   AliTPCPid::wpik(Int_t nc,Float_t q)
  71 {
  72     Float_t qmpi,qmk,sigpi,sigk,dpi,dk,ppi,pk;
  73     Float_t appi,apk;
  74     qmpi =cut[nc][1];
  75     sigpi=cut[nc][2];
  76     qmk  =cut[nc][3];
  77     sigk =cut[nc][4];
  78     appi = aprob[0][nc-5];
  79     apk  = aprob[1][nc-5];
  80     if( !fSilent ){
  81     cout<<"qmpi,sigpi,qmk,sigk="<<qmpi<<"  "<<sigpi<<"  "<<qmk<<"  "<<sigk<<endl;
  82     cout<<"appi,apk="<<appi<<","<<apk<<endl;
  83     }
  84     Float_t dqpi=(q-qmpi)/sigpi;
  85     Float_t dqk =(q-qmk )/sigk;
  86     dpi =fabs(dqpi);
  87     dk  =fabs(dqk);
  88     Double_t dn=appi*TMath::Gaus(q,qmpi,sigpi)+apk*TMath::Gaus(q,qmk,sigk);
  89     if(dn>0.){
  90       ppi=appi*TMath::Gaus(q,qmpi,sigpi)/dn;
  91       pk = apk*TMath::Gaus(q,qmk, sigk )/dn;
  92     }else{fWpi=1;return pion();}
  93     Float_t rpik=ppi/(pk+0.0000001);
  94     if( !fSilent )
  95         cout<<"q,dqpi,dqk, wpik: ppi,pk,rpik="
  96         <<q<<"  "<<dqpi<<"  "<<dqk<<"  "<<ppi<<"  "<<pk<<"  "<<rpik<<endl;
  97
  98     fWp=0.; fWpi=ppi; fWk=pk;
  99     if( pk>ppi){return kaon();}else{return pion();}
 100 }
 101 //-----------------------------------------------------------
 102 //inline
 103 Int_t   AliTPCPid::wpikp(Int_t nc,Float_t q)
 104 {
 105    Float_t qmpi,qmk,qmp,sigpi,sigk,sigp,ppi,pk,pp;
 106    Float_t appi,apk,app;
 107
 108     qmpi =cut[nc][1];
 109     sigpi=cut[nc][2];
 110     qmk  =cut[nc][3];
 111     sigk =cut[nc][4];
 112     qmp  =cut[nc][5];
 113     sigp =cut[nc][6];
 114
 115     //appi = apk = app = 1.;
 116     appi = aprob[0][nc-5];
 117     apk  = aprob[1][nc-5];
 118     app  = aprob[2][nc-5];
 119
 120     Double_t dn= appi*TMath::Gaus(q,qmpi,sigpi)
 121       +apk*TMath::Gaus(q,qmk,sigk)+app*TMath::Gaus(q,qmp,sigp);
 122     if(dn>0.){
 123     ppi=appi*TMath::Gaus(q,qmpi,sigpi)/dn;
 124     pk = apk*TMath::Gaus(q,qmk, sigk )/dn;
 125     pp = app*TMath::Gaus(q,qmp, sigp )/dn;
 126      }
 127     else{fWpi=1;return pion();}
 128     fWp=pp; fWpi=ppi; fWk=pk;
 129     if( !fSilent ){
 130 cout<<" wpikp: mid,sig pi,k,p="<<qmpi<<" "<<sigpi<<";   "<<qmk<<" "<<sigk<<";   "
 131     <<qmp<<" "<<sigp<<"; "<<endl;
 132 cout<<" aprob: "<<appi<<"  "<<apk<<"  "<<app<<endl;
 133 cout<<" ppi,pk,pp="<<ppi<<"  "<<pk<<"  "<<pp<<endl;
 134      }
 135     if( ppi>pk&&ppi>pp )  { return pion(); }
 136     if(pk>pp){return kaon();}else{return proton();}
 137 }
 138 //-----------------------------------------------------------
 139 Int_t   AliTPCPid::GetPcode(TClonesArray* rps,Float_t pm)
 140 {
 141     return 0;
 142 }
 143 //-----------------------------------------------------------
 144 Int_t   AliTPCPid::GetPcode(AliTPCtrack *track)
 145 {
 146       Double_t xk,par[5]; track->GetExternalParameters(xk,par);
 147       Float_t phi=TMath::ASin(par[2]) + track->GetAlpha();
 148       if (phi<-TMath::Pi()) phi+=2*TMath::Pi();
 149       if (phi>=TMath::Pi()) phi-=2*TMath::Pi();
 150       Float_t lam=TMath::ATan(par[3]);
 151       Float_t pt_1=TMath::Abs(par[4]);
 152       Float_t mom=1./(pt_1*TMath::Cos(lam));
 153       Float_t dedx=track->GetdEdx();
 154     Int_t pcode=GetPcode(dedx/40.,mom);
 155     cout<<"TPCtrack dedx,mom,pcode="<<dedx<<","<<mom<<","<<pcode<<endl;
 156     return pcode?pcode:211;
 157     }
 158 //-----------------------------------------------------------
 159 Int_t   AliTPCPid::GetPcode(AliITStrackV2 *track)
 160 {
 161   if(track==0)return 0;
 162   //      track->Propagate(track->GetAlpha(),3.,0.1/65.19*1.848,0.1*1.848);
 163       track->PropagateTo(3.,0.0028,65.19);
 164       track->PropagateToVertex();
 165     Double_t xk,par[5]; track->GetExternalParameters(xk,par);
 166     Float_t lam=TMath::ATan(par[3]);
 167     Float_t pt_1=TMath::Abs(par[4]);
 168     Float_t mom=0.;
 169     if( (pt_1*TMath::Cos(lam))!=0. ){ mom=1./(pt_1*TMath::Cos(lam)); }else{mom=0.;};
 170     Float_t dedx=track->GetdEdx();
 171     cout<<"lam,pt_1,mom,dedx="<<lam<<","<<pt_1<<","<<mom<<","<<dedx<<endl;
 172     Int_t pcode=GetPcode(dedx,mom);
 173     cout<<"ITS V2 dedx,mom,pcode="<<dedx<<","<<mom<<","<<pcode<<endl;
 174 return pcode?pcode:211;
 175 }
 176 //-----------------------------------------------------------
 177 Int_t   AliTPCPid::GetPcode(Float_t q,Float_t pm)
 178 {
 179     fWpi=fWk=fWp=0.;     fPcode=0;
 180 //1)---------------------- 0-120 MeV/c --------------
 181     if ( pm<=cut[1][0] )
 182         { fWpi=1.; return pion(); }
 183 //2)----------------------120-200 Mev/c ( 29.7.2002 ) -------------
 184     if ( pm<=cut[2][0] )
 185         { if( q<fCutKa->Eval(pm) ){fWpi=1.; return pion(); }
 186                              else {fWk =1.; return  kaon();} }
 187 //3)----------------------200-400 Mev/c -------------
 188     if ( pm<=cut[3][0] )
 189         if( q<fCutKa->Eval(pm) )
 190                 { fWpi=1.;return pion(); }
 191              else
 192                 { if ( q<=fCutPr->Eval(pm) )
 193                              {fWk=1.;return kaon();}
 194                         else {fWp=1.;return proton();}
 195                 }
 196 //4)----------------------400-450 Mev/c -------------
 197     if ( pm<=cut[4][0] )
 198         if( q<fCutKaTune*fCutKa->Eval(pm) )
 199                 { fWpi=1.;return pion(); }
 200             else
 201                 { if( q<fCutPr->Eval(pm) )
 202                   {fWk=1.;return kaon();} else {fWp=1.;return proton(); }
 203                 }
 204 //5)----------------------450-500 Mev/c -------------
 205     if ( pm<=cut[5][0] )
 206         if ( q>fCutPr->Eval(pm) )
 207            {fWp=1.;return proton();} else {return wpik(5,q);};
 208 //6)----------------------500-550 Mev/c -------------
 209     if ( pm<=cut[6][0] )
 210         if ( q>fCutPr->Eval(pm) )
 211            {fWp=1.;return proton();} else {return wpik(6,q);};
 212 //7)----------------------550-600 Mev/c -------------
 213     if ( pm<=cut[7][0] )
 214         if ( q>fCutPr->Eval(pm) )
 215            {fWp=1.;return proton();} else {return wpik(7,q);};
 216 //8)----------------------600-650 Mev/c -------------
 217     if ( pm<=cut[8][0] )
 218       if ( q>fCutPrTune*fCutPr->Eval(pm) ){fWp=1.;return proton();}
 219                                      else {return wpik(8,q);};
 220 //9)----------------------650-730 Mev/c -------------
 221     if ( pm<=cut[9][0] )
 222       if ( q>fCutPrTune*fCutPr->Eval(pm) ){fWp=1.;return proton();}
 223                                      else {return wpik(9,q);};
 224 //10)----------------------730-830 Mev/c -------------
 225     if( pm<=cut[10][0] )
 226       if ( q>fCutPrTune*fCutPr->Eval(pm) ){fWp=1.;return proton();}
 227                                      else {return wpik(10,q);};
 228 //11)----------------------830-930 Mev/c -------------
 229     if( pm<=cut[11][0] ){ return wpikp(11,q); }
 230 //12)----------------------930-1030 Mev/c -------------
 231     if( pm<=cut[12][0] )
 232      { return wpikp(12,q); };
 233
 234     return fPcode;
 235 }
 236 //-----------------------------------------------------------
 237 void    AliTPCPid::SetCut(Int_t n,Float_t pm,Float_t pilo,Float_t pihi,
 238                         Float_t klo,Float_t khi,Float_t plo,Float_t phi)
 239 {
 240     cut[n][0]=pm;
 241     cut[n][1]=pilo;
 242     cut[n][2]=pihi;
 243     cut[n][3]=klo;
 244     cut[n][4]=khi;
 245     cut[n][5]=plo;
 246     cut[n][6]=phi;
 247     return ;
 248 }
 249 //------------------------------------------------------------
 250 void AliTPCPid::SetVec(Int_t ntrack,TVector info)
 251 {
 252 TClonesArray& arr=*trs;
 253     new( arr[ntrack] ) TVector(info);
 254 }
 255 //-----------------------------------------------------------
 256 TVector* AliTPCPid::GetVec(Int_t ntrack)
 257 {
 258 TClonesArray& arr=*trs;
 259     return (TVector*)arr[ntrack];
 260 }
 261 //-----------------------------------------------------------
 262 void AliTPCPid::SetEdep(Int_t track,Float_t Edep)
 263 {
 264     TVector xx(0,11);
 265     if( ((TVector*)trs->At(track))->IsValid() )
 266         {TVector yy( *((TVector*)trs->At(track)) );xx=yy; }
 267     Int_t j=(Int_t)xx(0); if(j>4)return;
 268     xx(++j)=Edep;xx(0)=j;
 269     TClonesArray &arr=*trs;
 270     new(arr[track])TVector(xx);
 271 }
 272 //-----------------------------------------------------------
 273 void AliTPCPid::SetPmom(Int_t track,Float_t Pmom)
 274 {
 275     TVector xx(0,11);
 276     if( ((TVector*)trs->At(track))->IsValid() )
 277         {TVector yy( *((TVector*)trs->At(track)) );xx=yy; }
 278     xx(10)=Pmom;
 279     TClonesArray &arr=*trs;
 280     new(arr[track])TVector(xx);
 281 }
 282 //-----------------------------------------------------------
 283 void AliTPCPid::SetPcod(Int_t track,Int_t partcode)
 284 {
 285     TVector xx(0,11);
 286     if( ((TVector*)trs->At(track))->IsValid() )
 287         {TVector yy( *((TVector*)trs->At(track)) );xx=yy; }
 288     if(xx(11)==0)
 289         {xx(11)=partcode; mxtrs++;
 290         TClonesArray &arr=*trs;
 291         new(arr[track])TVector(xx);
 292         }
 293 }
 294 //-----------------------------------------------------------
 295 void AliTPCPid::Print(Int_t track)
 296 {cout<<mxtrs<<" tracks in AliITSPid obj."<<endl;
 297     if( ((TVector*)trs->At(track))->IsValid() )
 298         {TVector xx( *((TVector*)trs->At(track)) );
 299          xx.Print();
 300          }
 301     else
 302         {cout<<"No data for track "<<track<<endl;return;}
 303 }
 304 //-----------------------------------------------------------
 305 void AliTPCPid::Tab(void)
 306 {
 307 if(trs->GetEntries()==0){cout<<"No entries in TAB"<<endl;return;}
 308 cout<<"------------------------------------------------------------------------"<<endl;
 309 cout<<"Nq"<<"   q1  "<<"   q2  "<<"   q3  "<<"   q4  "<<"   q5   "<<
 310       " Qtrm    "    <<"  Wpi  "<<"  Wk   "<<"  Wp  "<<"Pmom  "<<endl;
 311 cout<<"------------------------------------------------------------------------"<<endl;
 312 for(Int_t i=0;i<trs->GetEntries();i++)
 313 {
 314   TVector xx( *((TVector*)trs->At(i)) );
 315     if( xx.IsValid() && xx(0)>0 )
 316         {
 317             TVector xx( *((TVector*)trs->At(i)) );
 318             if(xx(0)>=2)
 319                 {
 320 //       1)Calculate Qtrm
 321                     xx(6)=(this->qtrm(i));
 322
 323                  }else{
 324                      xx(6)=xx(1);
 325                  }
 326 //       2)Calculate Wpi,Wk,Wp
 327             this->GetPcode(xx(6),xx(10)/1000.);
 328             xx(7)=GetWpi();
 329             xx(8)=GetWk();
 330             xx(9)=GetWp();
 331 //       3)Print table
 332             if(xx(0)>0){
 333                     cout<<xx(0)<<" ";
 334                     for(Int_t j=1;j<11;j++){
 335                         cout.width(7);cout.precision(5);cout<<xx(j);
 336                     }
 337                     cout<<endl;
 338                 }
 339 //        4)Update data in TVector
 340             TClonesArray &arr=*trs;
 341             new(arr[i])TVector(xx);
 342         }
 343     else
 344       {/*cout<<"No data for track "<<i<<endl;*/}
 345 }// End loop for tracks
 346 }
 347 void AliTPCPid::Reset(void)
 348 {
 349   for(Int_t i=0;i<trs->GetEntries();i++){
 350     TVector xx(0,11);
 351     TClonesArray &arr=*trs;
 352     new(arr[i])TVector(xx);
 353   }
 354 }
 355 //-----------------------------------------------------------
 356 AliTPCPid::AliTPCPid(Int_t ntrack)
 357 {
 358     trs = new TClonesArray("TVector",ntrack);
 359     TClonesArray &arr=*trs;
 360     for(Int_t i=0;i<ntrack;i++)new(arr[i])TVector(0,11);
 361     mxtrs=0;
 362
 363     //fCutKa = new TF1("fkaons","[0]/x/x+[1]",0.1,1.2);
 364     //fCutPr = new TF1("fprotons","[0]/x/x +[1]",0.2,1.2);
 365     TF1 *f_rmska = new TF1("x_frmska","1.46-7.82*x+16.78*x^2-15.53*x^3+5.24*x^4 ",
 366                 0.1,1.2);
 367     fCutKa = new TF1("fkaons",
 368            "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",
 369            0.1,1.2);
 370     fCutPr = new TF1("fprotons",
 371                      "0.83*(15.32-56.094*x+89.962*x^2-66.1856*x^3+18.4052*x^4)",
 372                      0.2,1.2);
 373     fCutKaTune=1.1; // 0.92;
 374     fCutPrTune=1.0; //0.80;
 375
 376 const int inf=10;
 377 //         Ncut Pmom   pilo  pihi    klo    khi     plo    phi
 378 //       cut[j] [0]    [1]    [2]    [3]    [4]     [5]    [6]
 379 //----------------------------------------------------------------
 380     SetCut(  1, 0.120,  0.  ,  0.  , inf  , inf   , inf  , inf  );
 381     SetCut(  2, 0.200,  0.  ,  6.0 , 6.0  , inf   , inf  , inf  ); //120-200
 382     SetCut(  3, 0.400,  0.  ,  3.5 , 3.5  , 9.0   , 9.0  , inf  ); //200-400
 383     SetCut(  4, 0.450,  0.  ,  1.9 , 1.9  , 4.0   , 4.0  , inf  ); //400-450
 384 //----------------------------------------------------------------
 385     SetCut(  5, 0.500, 0.976, 0.108, 1.484 , 0.159  , 3.5  , inf  );  //450-500
 386     SetCut(  6, 0.550, 0.979, 0.108, 1.376 , 0.145  , 3.0  , inf  );  //500-550
 387 //----------------------------------------------------------------
 388     SetCut(  7, 0.600, 0.984, 0.111, 1.295 , 0.146 , 2.7  , inf  );   //550-600
 389     SetCut(  8, 0.650, 0.989, 0.113, 1.239 , 0.141 , 2.5  , inf  );   //600-650
 390     SetCut(  9, 0.730, 0.995, 0.109, 1.172 , 0.132 , 2.0  , inf  );   //650-730
 391 //----------------------------------------------------------------
 392     SetCut( 10, 0.830, 1.008, 0.116, 1.117 , 0.134 , 1.703, 0.209 ); //730-830
 393     SetCut( 11, 0.930, 1.019, 0.115, 1.072 , 0.121 , 1.535, 0.215 ); //830-930
 394     SetCut( 12, 1.230, 1.035, 0.117, 1.053 , 0.140  ,1.426, 0.270); //930-1030
 395     //------------------------ pi,K ---------------------
 396     aprob[0][0]=33219.;   aprob[1][0]=1971.;   // aprob[0][i] -    pions
 397     aprob[0][1]=28828.;   aprob[1][1]=1973.; // aprob[1][i] -    kaons
 398     //---------------------------------------------------
 399     aprob[0][2]=24532.;   aprob[1][2]=1932.; aprob[2][2]=1948.;
 400     aprob[0][3]=20797.;   aprob[1][3]=1823.; aprob[2][3]=1970.;
 401     aprob[0][4]=27017.;   aprob[1][4]=2681.; aprob[2][4]=2905.;
 402     //------------------------ pi,K,p -------------------
 403     aprob[0][5]= 24563.;    aprob[1][5]=2816.;  aprob[2][5]=3219.;
 404     aprob[0][6]= 16877.;    aprob[1][6]=2231.;  aprob[2][6]=2746.;
 405     aprob[0][7]= 11557.;    aprob[1][7]=1681;   aprob[2][7]=2190.;
 406
 407     fSilent=kTRUE;
 408 }
 409 //-----------------------------------------------------------
 410
 411
 412