1494cc093b5b9b3912b42d49157e0533ab81d7bb
[u/mrichter/AliRoot.git] / 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