ITS/AliITSPid.cxx

   1 #include "AliITSPid.h"
   2 #include "TMath.h"
   3 #include "AliITSIOTrack.h"
   4 #include <Riostream.h>
   5 ClassImp(AliITSPid)
   6
   7 Float_t AliITSPid::qcorr(Float_t xc)
   8 {
   9     assert(0);
  10   Float_t fcorr;
  11   fcorr=( 0.766 +0.9692*xc -1.267*xc*xc )*( 1.-TMath::Exp(-xc*64.75) );
  12   if(fcorr<=0.1)fcorr=0.1;
  13 return qtot/fcorr;
  14 }
  15
  16 Float_t AliITSPid::qtrm(Int_t track)
  17 {
  18     TVector q(*( this->GetVec(track)  ));
  19     Int_t ml=(Int_t)q(0);
  20     if(ml<1)return 0.;
  21     if(ml>6)ml=6;
  22     float vf[6];
  23     Int_t nl=0; for(Int_t i=0;i<ml;i++){if(q(i)>fSigmin){vf[nl]=q(i+1);nl++;}}
  24     if(nl==0)return 0.;
  25     switch(nl){
  26       case  1:q(6)=q(1); break;
  27       case  2:q(6)=(q(1)+q(2))/2.; break;
  28       default:
  29         for(int fi=0;fi<2;fi++){
  30           Int_t swap;
  31           do{ swap=0; float qmin=vf[fi];
  32           for(int j=fi+1;j<nl;j++)
  33             if(qmin>vf[j]){qmin=vf[j];vf[j]=vf[fi];vf[fi]=qmin;swap=1;};
  34           }while(swap==1);
  35         }
  36         q(6)= (vf[0]+vf[1])/2.;
  37         break;
  38     }
  39     for(Int_t i=0;i<nl;i++){q(i+1)=vf[i];} this->SetVec(track,q);
  40     return (q(6));
  41 }
  42
  43 Float_t AliITSPid::qtrm(Float_t qarr[6],Int_t narr)
  44 {
  45   Float_t q[6],qm,qmin;
  46   Int_t nl,ml;
  47   if(narr>0&&narr<7){ml=narr;}else{return 0;};
  48   nl=0; for(Int_t i=0;i<ml;i++){if(qarr[i]>fSigmin){q[nl]=qarr[i];nl++;}}
  49   if(nl==0)return 0.;
  50     switch(nl){
  51       case  1:qm=q[0]; break;
  52       case  2:qm=(q[0]+q[1])/2.; break;
  53       default:
  54         Int_t swap;
  55         for(int fi=0;fi<2;fi++){
  56           do{ swap=0; qmin=q[fi];
  57           for(int j=fi+1;j<nl;j++)
  58             if(qmin>q[j]){qmin=q[j];q[j]=q[fi];q[fi]=qmin;swap=1;};
  59           }while(swap==1);
  60         }
  61         qm= (q[0]+q[1])/2.;
  62         break;
  63     }
  64     return qm;
  65 }
  66 //-----------------------------------------------------------
  67 //inline
  68 Int_t   AliITSPid::wpik(Int_t nc,Float_t q)
  69 {
  70   //         return pion();
  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 //    cout<<"qmpi,sigpi,qmk,sigk="<<qmpi<<"  "<<sigpi<<"  "<<qmk<<"  "<<sigk<<endl;
  81 //    cout<<"appi,apk="<<appi<<","<<apk<<endl;
  82     Float_t dqpi=(q-qmpi)/sigpi;
  83     Float_t dqk =(q-qmk )/sigk;
  84     if( dqk<-1. )return pion();
  85     dpi =TMath::Abs(dqpi);
  86     dk  =TMath::Abs(dqk);
  87     //ppi =1.- TMath::Erf(dpi);  // +0.5;
  88     //pk  =1.- TMath::Erf(dk);   // +0.5;
  89     ppi=appi*TMath::Gaus(q,qmpi,sigpi)
  90         /(appi*TMath::Gaus(q,qmpi,sigpi)+apk*TMath::Gaus(q,qmk,sigk));
  91     pk = apk*TMath::Gaus(q,qmk, sigk )
  92         /(appi*TMath::Gaus(q,qmpi,sigpi)+apk*TMath::Gaus(q,qmk,sigk));
  93
  94 //    Float_t rpik=ppi/(pk+0.0000001);
  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   AliITSPid::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     //ppi =TMath::Erf( TMath::Abs((q-qmpi)/sigpi) )+0.5;
 121     //pka =TMath::Erf( TMath::Abs((q-qmk )/sigk)  )+0.5;
 122     //ppr =TMath::Erf( TMath::Abs((q-qmp )/sigp)  )+0.5;
 123
 124     ppi=appi*TMath::Gaus(q,qmpi,sigpi)
 125       /( appi*TMath::Gaus(q,qmpi,sigpi)+apk*TMath::Gaus(q,qmk,sigk)+app*TMath::Gaus(q,qmp,sigp) );
 126     pk = apk*TMath::Gaus(q,qmk, sigk )
 127       /( appi*TMath::Gaus(q,qmpi,sigpi)+apk*TMath::Gaus(q,qmk,sigk)+app*TMath::Gaus(q,qmp,sigp) );
 128     pp = app*TMath::Gaus(q,qmp, sigp )
 129       /( appi*TMath::Gaus(q,qmpi,sigpi)+apk*TMath::Gaus(q,qmk,sigk)+app*TMath::Gaus(q,qmp,sigp) );
 130
 131     fWp=pp; fWpi=ppi; fWk=pk;
 132
 133 //cout<<" wpikp: mid,sig pi,k,p="<<qmpi<<" "<<sigpi<<";   "<<qmk<<" "<<sigk<<";   "
 134 //    <<qmp<<" "<<sigp<<"; "<<endl;
 135 // cout<<" aprob: "<<appi<<"  "<<apk<<"  "<<app<<endl;
 136 //cout<<" ppi,pk,pp="<<ppi<<"  "<<pk<<"  "<<pp<<endl;
 137
 138     if( ppi>pk&&ppi>pp )  { return pion(); }
 139     if(pk>pp){return kaon();}else{return proton();}
 140 }
 141 //-----------------------------------------------------------
 142 Int_t   AliITSPid::GetPcode(TClonesArray* rps,Float_t pm)
 143 {
 144     return 0;
 145 }
 146 //-----------------------------------------------------------
 147 Int_t   AliITSPid::GetPcode(AliTPCtrack *track)
 148 {
 149       Double_t xk,par[5]; track->GetExternalParameters(xk,par);
 150       Float_t phi=TMath::ASin(par[2]) + track->GetAlpha();
 151       if (phi<-TMath::Pi()) phi+=2*TMath::Pi();
 152       if (phi>=TMath::Pi()) phi-=2*TMath::Pi();
 153       Float_t lam=TMath::ATan(par[3]);
 154       Float_t pt_1=TMath::Abs(par[4]);
 155       Float_t mom=1./(pt_1*TMath::Cos(lam));
 156       Float_t dedx=track->GetdEdx();
 157     Int_t pcode=GetPcode(dedx/40.,mom);
 158 //    cout<<"TPCtrack dedx,mom,pcode="<<dedx<<","<<mom<<","<<pcode<<endl;
 159     return pcode?pcode:211;
 160     }
 161 //------------------------------------------------------------
 162 Int_t   AliITSPid::GetPcode(AliITSIOTrack *track)
 163 {
 164     Double_t px,py,pz;
 165     px=track->GetPx();
 166     py=track->GetPy();
 167     pz=track->GetPz();
 168     Float_t mom=TMath::Sqrt(px*px+py*py+pz*pz);
 169 //???????????????????
 170     // Float_t dedx=1.0;
 171     Float_t dedx=track->GetdEdx();
 172 //???????????????????
 173     Int_t pcode=GetPcode(dedx,mom);
 174 //    cout<<"ITSV1 dedx,mom,pcode="<<dedx<<","<<mom<<","<<pcode<<endl;
 175 return pcode?pcode:211;
 176 }
 177 //-----------------------------------------------------------
 178 Int_t   AliITSPid::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   AliITSPid::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         { return pion(); }
 202 //2)----------------------120-200 Mev/c -------------
 203     if ( pm<=cut[2][0] )
 204         { if( q<cut[2][2] ){ return pion(); } else { return  kaon();} }
 205 //3)----------------------200-300 Mev/c -------------
 206     if ( pm<=cut[3][0] )
 207         if( q<cut[3][2])
 208                 { return pion(); }
 209              else
 210                 { if ( q<=cut[3][5] ) {return kaon();} else {return proton();}}
 211 //4)----------------------300-410 Mev/c -------------
 212     if ( pm<=cut[4][0] )
 213         if( q<cut[4][2] )
 214                 { return pion(); }
 215             else
 216                 { if( q<=cut[4][4] ) {return kaon();} else {return proton(); }}
 217 //5)----------------------410-470 Mev/c -------------
 218     if ( pm<=cut[5][0] )
 219         if ( q>cut[5][5] ) {return proton();} else {return wpik(5,q);};
 220 //6)----------------------470-530 Mev/c -------------
 221     if ( pm<=cut[6][0] )
 222         if ( q>cut[6][5] ) {return proton();} else {return wpik(6,q);};
 223 //7)----------------------530-590 Mev/c -------------
 224     if ( pm<=cut[7][0] )
 225         if ( q<=cut[7][5] ) {return wpik(7,q);} else {return proton();};
 226 //8)----------------------590-650 Mev/c -------------
 227     if ( pm<=cut[8][0] )
 228         if ( q<=cut[8][5] ) {return wpik(8,q);} else {return proton();};
 229 //9)----------------------650-730 Mev/c -------------
 230     if ( pm<=cut[9][0] )
 231         if ( q<=cut[9][5] ) {return wpik(9,q);} else {return proton();};
 232 //10)----------------------730-830 Mev/c -------------
 233     if( pm<=cut[10][0] ){ return wpikp(10,q); }
 234 //11)----------------------830-930 Mev/c -------------
 235     if( pm<=cut[11][0] ){ return wpikp(11,q); }
 236 //12)----------------------930-1030 Mev/c -------------
 237     if( pm<=cut[12][0] ){ return wpikp(12,q); }
 238
 239     return fPcode;
 240 }
 241 //-----------------------------------------------------------
 242 void    AliITSPid::SetCut(Int_t n,Float_t pm,Float_t pilo,Float_t pihi,
 243                         Float_t klo,Float_t khi,Float_t plo,Float_t phi)
 244 {
 245     cut[n][0]=pm;
 246     cut[n][1]=pilo;
 247     cut[n][2]=pihi;
 248     cut[n][3]=klo;
 249     cut[n][4]=khi;
 250     cut[n][5]=plo;
 251     cut[n][6]=phi;
 252     return ;
 253 }
 254 //------------------------------------------------------------
 255 void AliITSPid::SetVec(Int_t ntrack,TVector info)
 256 {
 257 TClonesArray& arr=*trs;
 258     new( arr[ntrack] ) TVector(info);
 259 }
 260 //-----------------------------------------------------------
 261 TVector* AliITSPid::GetVec(Int_t ntrack)
 262 {
 263 TClonesArray& arr=*trs;
 264     return (TVector*)arr[ntrack];
 265 }
 266 //-----------------------------------------------------------
 267 void AliITSPid::SetEdep(Int_t track,Float_t Edep)
 268 {
 269     TVector xx(0,11);
 270     if( ((TVector*)trs->At(track))->IsValid() )
 271         {TVector yy( *((TVector*)trs->At(track)) );xx=yy; }
 272     Int_t j=(Int_t)xx(0); if(j>4)return;
 273     xx(++j)=Edep;xx(0)=j;
 274     TClonesArray &arr=*trs;
 275     new(arr[track])TVector(xx);
 276 }
 277 //-----------------------------------------------------------
 278 void AliITSPid::SetPmom(Int_t track,Float_t Pmom)
 279 {
 280     TVector xx(0,11);
 281     if( ((TVector*)trs->At(track))->IsValid() )
 282         {TVector yy( *((TVector*)trs->At(track)) );xx=yy; }
 283     xx(10)=Pmom;
 284     TClonesArray &arr=*trs;
 285     new(arr[track])TVector(xx);
 286 }
 287 //-----------------------------------------------------------
 288 void AliITSPid::SetPcod(Int_t track,Int_t partcode)
 289 {
 290     TVector xx(0,11);
 291     if( ((TVector*)trs->At(track))->IsValid() )
 292         {TVector yy( *((TVector*)trs->At(track)) );xx=yy; }
 293     if(xx(11)==0)
 294         {xx(11)=partcode; mxtrs++;
 295         TClonesArray &arr=*trs;
 296         new(arr[track])TVector(xx);
 297         }
 298 }
 299 //-----------------------------------------------------------
 300 void AliITSPid::Print(Int_t track)
 301 {cout<<mxtrs<<" tracks in AliITSPid obj."<<endl;
 302     if( ((TVector*)trs->At(track))->IsValid() )
 303         {TVector xx( *((TVector*)trs->At(track)) );
 304          xx.Print();
 305          }
 306     else
 307         {cout<<"No data for track "<<track<<endl;return;}
 308 }
 309 //-----------------------------------------------------------
 310 void AliITSPid::Tab(void)
 311 {
 312 if(trs->GetEntries()==0){cout<<"No entries in TAB"<<endl;return;}
 313 cout<<"------------------------------------------------------------------------"<<endl;
 314 cout<<"Nq"<<"   q1  "<<"   q2  "<<"   q3  "<<"   q4  "<<"   q5   "<<
 315       " Qtrm    "    <<"  Wpi  "<<"  Wk   "<<"  Wp  "<<"Pmom  "<<endl;
 316 cout<<"------------------------------------------------------------------------"<<endl;
 317 for(Int_t i=0;i<trs->GetEntries();i++)
 318 {
 319   TVector xx( *((TVector*)trs->At(i)) );
 320     if( xx.IsValid() && xx(0)>0 )
 321         {
 322             TVector xx( *((TVector*)trs->At(i)) );
 323             if(xx(0)>=2)
 324                 {
 325 //       1)Calculate Qtrm
 326                     xx(6)=(this->qtrm(i));
 327
 328                  }else{
 329                      xx(6)=xx(1);
 330                  }
 331 //       2)Calculate Wpi,Wk,Wp
 332             this->GetPcode(xx(6),xx(10)/1000.);
 333             xx(7)=GetWpi();
 334             xx(8)=GetWk();
 335             xx(9)=GetWp();
 336 //       3)Print table
 337             if(xx(0)>0){
 338 //                  cout<<xx(0)<<" ";
 339                     for(Int_t j=1;j<11;j++){
 340                       if(i<7){ cout.width(7);cout.precision(4);cout<<xx(j);}
 341                       if(i>7){ cout.width(7);cout.precision(5);cout<<xx(j);}
 342                     }
 343                     cout<<endl;
 344                 }
 345 //        4)Update data in TVector
 346             TClonesArray &arr=*trs;
 347             new(arr[i])TVector(xx);
 348         }
 349     else
 350       {/*cout<<"No data for track "<<i<<endl;*/}
 351 }// End loop for tracks
 352 }
 353 void AliITSPid::Reset(void)
 354 {
 355   for(Int_t i=0;i<trs->GetEntries();i++){
 356     TVector xx(0,11);
 357     TClonesArray &arr=*trs;
 358     new(arr[i])TVector(xx);
 359   }
 360 }
 361 //-----------------------------------------------------------
 362 AliITSPid::AliITSPid(Int_t ntrack)
 363 {
 364   fSigmin=0.01;
 365     trs = new TClonesArray("TVector",ntrack);
 366     TClonesArray &arr=*trs;
 367     for(Int_t i=0;i<ntrack;i++)new(arr[i])TVector(0,11);
 368     mxtrs=0;
 369 const int inf=10;
 370 //         Ncut Pmom   pilo  pihi    klo    khi     plo    phi
 371 //       cut[j] [0]    [1]    [2]    [3]    [4]     [5]    [6]
 372 //----------------------------------------------------------------
 373     SetCut(  1, 0.12 ,  0.  ,  0.  , inf  , inf   , inf  , inf  );
 374     SetCut(  2, 0.20 ,  0.  ,  6.0 , 6.0  , inf   , inf  , inf  );
 375     SetCut(  3, 0.30 ,  0.  ,  3.5 , 3.5  , 9.0   , 9.0  , inf  );
 376     SetCut(  4, 0.41 ,  0.  ,  1.9 , 1.9  , 4.0   , 4.0  , inf  );
 377 //----------------------------------------------------------------
 378     SetCut(  5, 0.47 , 0.935, 0.139, 1.738 , 0.498  , 3.5  , inf  );  //410-470
 379     SetCut(  6, 0.53 , 0.914, 0.136, 1.493 , 0.436  , 3.0  , inf  );  //470-530
 380 //----------------------------------------------------------------
 381     SetCut(  7, 0.59 , 0.895, 0.131, 1.384 , 0.290 , 2.7  , inf  );    //530-590
 382     SetCut(  8, 0.65 , 0.887, 0.121, 1.167 , 0.287 , 2.5  , inf  );     //590-650
 383     SetCut(  9, 0.73 , 0.879, 0.120, 1.153 , 0.257 , 2.0  , inf  );     //650-730
 384 //----------------------------------------------------------------
 385     SetCut( 10, 0.83 , 0.880, 0.126, 1.164 , 0.204 , 2.308 , 0.297 );       //730-830
 386     SetCut( 11, 0.93 , 0.918, 0.145, 1.164 , 0.204 , 2.00 , 0.168 );        //830-930
 387     SetCut( 12, 1.03 , 0.899, 0.128, 1.164 , 0.204  ,1.80 , 0.168);
 388     //------------------------ pi,K ---------------------
 389     aprob[0][0]=1212;     aprob[1][0]=33.;   // aprob[0][i] - const for pions,cut[i+5]
 390     aprob[0][1]=1022;     aprob[1][1]=46.2 ; // aprob[1][i] -           kaons
 391     //---------------------------------------------------
 392     aprob[0][2]= 889.7;   aprob[1][2]=66.58; aprob[2][2]=14.53;
 393     aprob[0][3]= 686.;    aprob[1][3]=88.8;  aprob[2][3]=19.27;
 394     aprob[0][4]= 697.;    aprob[1][4]=125.6; aprob[2][4]=28.67;
 395     //------------------------ pi,K,p -------------------
 396     aprob[0][5]= 633.7;   aprob[1][5]=100.1;   aprob[2][5]=37.99;   // aprob[2][i] -  protons
 397     aprob[0][6]= 469.5;   aprob[1][6]=20.74;   aprob[2][6]=25.43;
 398     aprob[0][7]= 355.;    aprob[1][7]=
 399                           355.*(20.74/469.5);  aprob[2][7]=34.08;
 400 }
 401 //-----------------------------------------------------------
 402