ITS/AliITSPid.cxx

   1 #include "AliITSPid.h"
   2 #include "TMath.h"
   3 #include "AliITSIOTrack.h"
   4 #include <iostream.h>
   5 ClassImp(AliITSPid)
   6
   7 //-----------------------------------------------------------
   8 Float_t AliITSPid::qcorr(Float_t xc)
   9 {
  10     assert(0);
  11   Float_t fcorr;
  12   fcorr=( 0.766 +0.9692*xc -1.267*xc*xc )*( 1.-TMath::Exp(-xc*64.75) );
  13   if(fcorr<=0.1)fcorr=0.1;
  14 return qtot/fcorr;
  15 }
  16 //-----------------------------------------------------------
  17 #include "vector.h"
  18 #include <algorithm>
  19 Float_t AliITSPid::qtrm(Int_t track)
  20 {
  21     TVector q(*( this->GetVec(track)  ));
  22     Int_t nl=(Int_t)q(0);
  23     if(nl<1)return 0.;
  24     vector<float> vf(nl);
  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_t i=0;i<nl;i++){vf[i]=q(i+1);}
  30         sort(vf.begin(),vf.end());
  31         q(6)= (vf[0]+vf[1])/2.;
  32         break;
  33     }
  34     for(Int_t i=0;i<nl;i++){q(i+1)=vf[i];} this->SetVec(track,q);
  35     return (q(6));
  36 }
  37 //........................................................
  38 Float_t AliITSPid::qtrm(Float_t qarr[6],Int_t narr)
  39 {
  40   Float_t q[6],qm;
  41   Int_t nl,ml;
  42   narr>6?ml=6:ml=narr;
  43   nl=0; for(Int_t i=0;i<ml;i++){if(qarr[i]>0.){q[i]=qarr[i];nl++;}}
  44   if(nl==0)return 0.;
  45     vector<float> vf(nl);
  46     switch(nl){
  47       case  1:qm=q[0]; break;
  48       case  2:qm=(q[0]+q[1])/2.; break;
  49       default:
  50         for(Int_t i=0;i<nl;i++){vf[i]=q[i];}
  51         sort(vf.begin(),vf.end());
  52         qm= (vf[0]+vf[1])/2.;
  53         break;
  54     }
  55     return qm;
  56 }
  57 //-----------------------------------------------------------
  58 //inline
  59 Int_t   AliITSPid::wpik(Int_t nc,Float_t q)
  60 {
  61        return pion();
  62
  63     Float_t qmpi,qmk,sigpi,sigk,dpi,dk,ppi,pk;
  64     qmpi =cut[nc][1];
  65     sigpi=cut[nc][2];
  66     qmk  =cut[nc][3];
  67     sigk =cut[nc][4];
  68     Float_t dqpi=(q-qmpi)/sigpi;
  69     Float_t dqk =(q-qmk )/sigk;
  70     if( dqk<-1. )return pion();
  71     dpi =fabs(dqpi);
  72     dk  =fabs(dqk);
  73     ppi =1.- TMath::Erf(dpi);  // +0.5;
  74     pk  =1.- TMath::Erf(dk);   // +0.5;
  75     Float_t rpik=ppi/(pk+0.0000001);
  76         cout<<"q,dqpi,dqk, wpik: ppi,pk,rpik="
  77         <<q<<" "<<dqpi<<" "<<dqk<<" "<<ppi<<" "<<pk<<" "<<rpik<<endl;
  78     if( rpik>=1000. ){return pion();}
  79     if( rpik>0.001 ){fWk=1./(rpik+1.); fWpi=1.-fWk;return 0;}
  80     return pion();
  81 }
  82 //-----------------------------------------------------------
  83 //inline
  84 Int_t   AliITSPid::wpikp(Int_t nc,Float_t q)
  85 {
  86        return pion();
  87
  88    Float_t qmpi,qmk,qmp,sigpi,sigk,sigp,ppi,pka,ppr,rppi,rpka;
  89
  90     qmpi =cut[nc][1];
  91     sigpi=cut[nc][2];
  92     qmk  =cut[nc][3];
  93     sigk =cut[nc][4];
  94     qmp  =cut[nc][5];
  95     sigp =cut[nc][6];
  96
  97     ppi =TMath::Erf( TMath::Abs((q-qmpi)/sigpi) )+0.5;
  98     pka =TMath::Erf( TMath::Abs((q-qmk )/sigk)  )+0.5;
  99     ppr =TMath::Erf( TMath::Abs((q-qmp )/sigp)  )+0.5;
 100
 101     rppi=ppr/ppi;
 102     rpka=ppr/pka;
 103     Float_t rp;
 104     if( rppi>rpka )  { rp=rpka; }
 105                  else{ rp=rppi; }
 106     if( rp>=1000. ){ return proton(); }
 107     if( rp>0.001  ){ fWp=rp/(rp+1.);return proton(); }
 108
 109     return 0;
 110 }
 111 //-----------------------------------------------------------
 112 Int_t   AliITSPid::GetPcode(TClonesArray* rps,Float_t pm)
 113 {
 114     return 0;
 115 }
 116 //-----------------------------------------------------------
 117 Int_t   AliITSPid::GetPcode(AliTPCtrack *track)
 118 {
 119       Double_t xk,par[5]; track->GetExternalParameters(xk,par);
 120       Float_t phi=TMath::ASin(par[2]) + track->GetAlpha();
 121       if (phi<-TMath::Pi()) phi+=2*TMath::Pi();
 122       if (phi>=TMath::Pi()) phi-=2*TMath::Pi();
 123       Float_t lam=TMath::ATan(par[3]);
 124       Float_t pt_1=TMath::Abs(par[4]);
 125       Float_t mom=1./(pt_1*TMath::Cos(lam));
 126       Float_t dedx=track->GetdEdx();
 127     Int_t pcode=GetPcode(dedx/40.,mom);
 128     cout<<"TPCtrack dedx,mom,pcode="<<dedx<<","<<mom<<","<<pcode<<endl;
 129     return pcode?pcode:211;
 130     }
 131 //------------------------------------------------------------
 132 /*
 133 Int_t   AliITSPid::GetPcode(AliITSIOTrack *track)
 134 {
 135     Double_t px,py,pz;
 136     px=track->GetPx();
 137     py=track->GetPy();
 138     pz=track->GetPz();
 139     Float_t mom=TMath::Sqrt(px*px+py*py+pz*pz);
 140 //???????????????????
 141    // Float_t dedx=1.0;
 142      Float_t dedx=track->GetdEdx();
 143 //???????????????????
 144     Int_t pcode=GetPcode(dedx,mom);
 145     cout<<"ITSV1 dedx,mom,pcode="<<dedx<<","<<mom<<","<<pcode<<endl;
 146 return pcode?pcode:211;
 147 }
 148 */
 149 //-----------------------------------------------------------
 150 Int_t   AliITSPid::GetPcode(AliITStrackV2 *track)
 151 {
 152   if(track==0)return 0;
 153   //track->Propagate(track->GetAlpha(),3.,0.1/65.19*1.848,0.1*1.848);
 154       track->PropagateTo(3.,0.0028,65.19);
 155
 156       track->PropagateToVertex();
 157     Double_t xk,par[5]; track->GetExternalParameters(xk,par);
 158     Float_t lam=TMath::ATan(par[3]);
 159     Float_t pt_1=TMath::Abs(par[4]);
 160     Float_t mom=0.;
 161     if( (pt_1*TMath::Cos(lam))!=0. ){ mom=1./(pt_1*TMath::Cos(lam)); }else{mom=0.;};
 162     Float_t dedx=track->GetdEdx();
 163     //cout<<"lam,pt_1,mom,dedx="<<lam<<","<<pt_1<<","<<mom<<","<<dedx<<endl;
 164     Int_t pcode=GetPcode(dedx,mom);
 165     //cout<<"ITS V2 dedx,mom,pcode="<<dedx<<","<<mom<<","<<pcode<<endl;
 166 return pcode?pcode:211;
 167 }
 168 //-----------------------------------------------------------
 169 Int_t   AliITSPid::GetPcode(Float_t q,Float_t pm)
 170 {
 171     fWpi=fWk=fWp=-1.;     fPcode=0;
 172 //1)
 173     if ( pm<=cut[1][0] )
 174         { return pion(); }
 175 //2)
 176     if ( pm<=cut[2][0] )
 177         { if( q<cut[2][2] ){ return pion(); } else { return  kaon();} }
 178 //3)
 179     if ( pm<=cut[3][0] )
 180         if( q<cut[3][2])
 181                 { return pion(); }
 182              else
 183                 { if ( q<=cut[3][5] ) {return kaon();} else {return proton();}}
 184 //4)
 185     if ( pm<=cut[4][0] )
 186         if( q<cut[4][2] )
 187                 { return pion(); }
 188             else
 189                 { if( q<=cut[4][4] ) {return kaon();} else {return proton(); }}
 190 //5)
 191     if ( pm<=cut[5][0] )
 192         if ( q>cut[5][5] ) {return proton();} else {return wpik(5,q);};
 193 //6)
 194     if ( pm<=cut[6][0] )
 195         if ( q>cut[6][5] ) {return proton();} else {return wpik(6,q);};
 196 //7)
 197     if ( pm<=cut[7][0] )
 198         if ( q<=cut[7][5] ) {return fPcode;} else {return proton();};
 199 //8)
 200     if ( pm<=cut[8][0] )
 201         if ( q<=cut[8][5] ) {return fPcode;} else {return proton();};
 202 //9)
 203     if ( pm<=cut[9][0] )
 204         if ( q<=cut[9][5] ) {return fPcode;} else {return proton();};
 205 //10)
 206     if( pm<=cut[10][0] ){ return wpikp(10,q); }
 207 //11)
 208     if( pm<=cut[11][0] ){ return wpikp(11,q); }
 209 //12)
 210     if( pm<=cut[12][0] ){ return wpikp(12,q); }
 211
 212     return fPcode;
 213 }
 214 //-----------------------------------------------------------
 215 void    AliITSPid::SetCut(Int_t n,Float_t pm,Float_t pilo,Float_t pihi,
 216                         Float_t klo,Float_t khi,Float_t plo,Float_t phi)
 217 {
 218     cut[n][0]=pm;
 219     cut[n][1]=pilo;
 220     cut[n][2]=pihi;
 221     cut[n][3]=klo;
 222     cut[n][4]=khi;
 223     cut[n][5]=plo;
 224     cut[n][6]=phi;
 225     return ;
 226 }
 227 //-----------------------------------------------------------
 228 void AliITSPid::SetVec(Int_t ntrack,TVector info)
 229 {
 230 TClonesArray& arr=*trs;
 231     new( arr[ntrack] ) TVector(info);
 232 }
 233 //-----------------------------------------------------------
 234 TVector* AliITSPid::GetVec(Int_t ntrack)
 235 {
 236 TClonesArray& arr=*trs;
 237     return (TVector*)arr[ntrack];
 238 }
 239 //-----------------------------------------------------------
 240 void AliITSPid::SetEdep(Int_t track,Float_t Edep)
 241 {
 242     TVector xx(0,11);
 243     if( ((TVector*)trs->At(track))->IsValid() )
 244         {TVector yy( *((TVector*)trs->At(track)) );xx=yy; }
 245     Int_t j=(Int_t)xx(0); if(j>4)return;
 246     xx(++j)=Edep;xx(0)=j;
 247     TClonesArray &arr=*trs;
 248     new(arr[track])TVector(xx);
 249 }
 250 //-----------------------------------------------------------
 251 void AliITSPid::SetPmom(Int_t track,Float_t Pmom)
 252 {
 253     TVector xx(0,11);
 254     if( ((TVector*)trs->At(track))->IsValid() )
 255         {TVector yy( *((TVector*)trs->At(track)) );xx=yy; }
 256     xx(10)=Pmom;
 257     TClonesArray &arr=*trs;
 258     new(arr[track])TVector(xx);
 259 }
 260 //-----------------------------------------------------------
 261 void AliITSPid::SetPcod(Int_t track,Int_t partcode)
 262 {
 263     TVector xx(0,11);
 264     if( ((TVector*)trs->At(track))->IsValid() )
 265         {TVector yy( *((TVector*)trs->At(track)) );xx=yy; }
 266     if(xx(11)==0)
 267         {xx(11)=partcode; mxtrs++;
 268         TClonesArray &arr=*trs;
 269         new(arr[track])TVector(xx);
 270         }
 271 }
 272 //-----------------------------------------------------------
 273 void AliITSPid::Print(Int_t track)
 274 {cout<<mxtrs<<" tracks in AliITSPid obj."<<endl;
 275     if( ((TVector*)trs->At(track))->IsValid() )
 276         {TVector xx( *((TVector*)trs->At(track)) );
 277          xx.Print();
 278          }
 279     else
 280         {cout<<"No data for track "<<track<<endl;return;}
 281 }
 282 //-----------------------------------------------------------
 283 void AliITSPid::Tab(void)
 284 {
 285 if(trs->GetEntries()==0){cout<<"No entries in TAB"<<endl;return;}
 286 cout<<"------------------------------------------------------------------------"<<endl;
 287 cout<<"Nq"<<"   q1  "<<"   q2  "<<"   q3  "<<"   q4  "<<"   q5   "<<
 288       " Qtrm    "    <<"  Wpi  "<<"  Wk   "<<"  Wp  "<<"Pmom  "<<endl;
 289 cout<<"------------------------------------------------------------------------"<<endl;
 290 for(Int_t i=0;i<trs->GetEntries();i++)
 291 {
 292   TVector xx( *((TVector*)trs->At(i)) );
 293     if( xx.IsValid() && xx(0)>0 )
 294         {
 295             TVector xx( *((TVector*)trs->At(i)) );
 296             if(xx(0)>=2)
 297                 {
 298 //       1)Calculate Qtrm
 299                     xx(6)=(this->qtrm(i));
 300
 301                  }else{
 302                      xx(6)=xx(1);
 303                  }
 304 //       2)Calculate Wpi,Wk,Wp
 305             this->GetPcode(xx(6),xx(10)/1000.);
 306             xx(7)=GetWpi();
 307             xx(8)=GetWk();
 308             xx(9)=GetWp();
 309 //       3)Print table
 310             if(xx(0)>0){
 311                     cout<<xx(0)<<" ";
 312                     for(Int_t j=1;j<11;j++){
 313                         cout.width(7);cout.precision(5);cout<<xx(j);
 314                     }
 315                     cout<<endl;
 316                 }
 317 //        4)Update data in TVector
 318             TClonesArray &arr=*trs;
 319             new(arr[i])TVector(xx);
 320         }
 321     else
 322       {/*cout<<"No data for track "<<i<<endl;*/}
 323 }// End loop for tracks
 324 }
 325 void AliITSPid::Reset(void)
 326 {
 327   for(Int_t i=0;i<trs->GetEntries();i++){
 328     TVector xx(0,11);
 329     TClonesArray &arr=*trs;
 330     new(arr[i])TVector(xx);
 331   }
 332 }
 333 //-----------------------------------------------------------
 334 AliITSPid::AliITSPid(Int_t ntrack)
 335 {
 336     trs = new TClonesArray("TVector",ntrack);
 337     TClonesArray &arr=*trs;
 338     for(Int_t i=0;i<ntrack;i++)new(arr[i])TVector(0,11);
 339     mxtrs=0;
 340 const int inf=10;
 341 //         Ncut Pmom   pilo  pihi    klo    khi     plo    phi
 342 //       cut[j] [0]    [1]    [2]    [3]    [4]     [5]    [6]
 343 //----------------------------------------------------------------
 344     SetCut(  1, 0.12 ,  0.  ,  0.  , inf  , inf   , inf  , inf  );
 345     SetCut(  2, 0.20 ,  0.  ,  6.0 , 6.0  , inf   , inf  , inf  );
 346     SetCut(  3, 0.30 ,  0.  ,  3.5 , 3.5  , 9.0   , 9.0  , inf  );
 347     SetCut(  4, 0.41 ,  0.  ,  1.9 , 1.9  , 4.0   , 4.0  , inf  );
 348 //----------------------------------------------------------------
 349     SetCut(  5, 0.47 ,  1.  ,  0.12, 1.98 , 0.17  , 3.5  , inf  );
 350     SetCut(  6, 0.53 ,  1.  ,  0.12, 1.75 , 0.16  , 3.0  , inf  );
 351 //----------------------------------------------------------------
 352     SetCut(  7, 0.59 ,  0.  ,  0.  , 1.18 , 0.125 , 2.7  , inf  );
 353     SetCut(  8, 0.65 ,  0.  ,  0.  , 1.18 , 0.125 , 2.5  , inf  );
 354     SetCut(  9, 0.73 ,  0.  ,  0.  , 0.   , 0.125 , 2.0  , inf  );
 355 //----------------------------------------------------------------
 356     SetCut( 10, 0.83 ,  0.  ,  0.  , 1.25 , 0.13  , 2.14 , 0.20 );
 357     SetCut( 11, 0.93 ,  0.  ,  0.  , 1.18 , 0.125 , 1.88 , 0.18 );
 358     SetCut( 12, 1.03 ,  0.  ,  0.  , 1.13 , 0.12  , 1.68 , 0.155);
 359 }
 360 //-----------------------------------------------------------
 361