]> git.uio.no Git - u/mrichter/AliRoot.git/blobdiff - ITS/AliITSClusterFinderV2SSD.cxx
adding arguments to AddTaskPhysicsSelection for MC and BG identification (Antonin)
[u/mrichter/AliRoot.git] / ITS / AliITSClusterFinderV2SSD.cxx
index 32e34aeead1df0bf0c174a98a34f7917ff71ffdd..3e46291731ad4b1e7bec1676309c3f2240b28f3b 100644 (file)
@@ -804,18 +804,24 @@ FindClustersSSD(Ali1Dcluster* neg, Int_t nn,
       seg->GetPadCxz(yn, yp, xt, zt);
       //cout<<yn<<" "<<yp<<" "<<xt<<" "<<zt<<endl;
       
-      if (TMath::Abs(xt)<hwSSD+0.01)
-      if (TMath::Abs(zt)<hlSSD+0.01*(neg[j].GetNd()+pos[i].GetNd())) {
-       negativepair[i*10+cnegative[i]] =j;  //index
-       positivepair[j*10+cpositive[j]] =i;
-       cnegative[i]++;  //counters
-       cpositive[j]++; 
-       fgPairs[i*nn+j]=100;
+      if (TMath::Abs(xt)<hwSSD)
+      if (TMath::Abs(zt)<hlSSD) {
+       Int_t in = i*10+cnegative[i];
+       Int_t ip = j*10+cpositive[j];
+       if ((in < 10*np) && (ip < 10*nn)) {
+         negativepair[in] =j;  //index
+         positivepair[ip] =i;
+         cnegative[i]++;  //counters
+         cpositive[j]++;       
+         fgPairs[i*nn+j]=100;
+       }
+       else
+         AliError(Form("Index out of range: ip=%d, in=%d",ip,in));
       }
     }
   }
 
-  //
+  /* //
   // try to recover points out of but close to the module boundaries 
   //
   for (Int_t i=0; i<np; i++) {
@@ -835,14 +841,21 @@ FindClustersSSD(Ali1Dcluster* neg, Int_t nn,
        // tag 1Dcluster (eventually will produce low quality recpoint)
        if (cnegative[i]==0) pos[i].SetNd(100);  // not available pair
        if (cpositive[j]==0) neg[j].SetNd(100);  // not available pair
-       negativepair[i*10+cnegative[i]] =j;  //index
-       positivepair[j*10+cpositive[j]] =i;
-       cnegative[i]++;  //counters
-       cpositive[j]++; 
-       fgPairs[i*nn+j]=100;
+       Int_t in = i*10+cnegative[i];
+       Int_t ip = j*10+cpositive[j];
+       if ((in < 10*np) && (ip < 10*nn)) {
+         negativepair[in] =j;  //index
+         positivepair[ip] =i;
+         cnegative[i]++;  //counters
+         cpositive[j]++;       
+         fgPairs[i*nn+j]=100;
+       }
+       else
+         AliError(Form("Index out of range: ip=%d, in=%d",ip,in));
       }
     }
   }
+  */
 
   //
   Float_t lp[6];
@@ -907,19 +920,26 @@ FindClustersSSD(Ali1Dcluster* neg, Int_t nn,
        milab[3]=(((ip<<10) + j)<<10) + idet; // pos|neg|det
        Int_t info[3] = {pos[ip].GetNd(),neg[j].GetNd(),fNlayer[fModule]};
 
-       lp[2]=0.0022*0.0022;  //SigmaY2
-       lp[3]=0.110*0.110;  //SigmaZ2
+       lp[2]=4.968e-06;     // 0.00223*0.00223;  //SigmaY2
+       lp[3]=0.012;         // 0.110*0.110;  //SigmaZ2
        // out-of-diagonal element of covariance matrix
        if( (info[0]==1) && (info[1]==1) ) lp[5]=-0.00012;
        else if ( (info[0]>1) && (info[1]>1) ) { 
-         lp[2]=0.0016*0.0016;  //SigmaY2
-         lp[3]=0.08*0.08;  //SigmaZ2
-         lp[5]=-0.00006;
+         lp[2]=2.63e-06;    // 0.0016*0.0016;  //SigmaY2
+         lp[3]=0.0065;      // 0.08*0.08;   //SigmaZ2
+         lp[5]=-6.48e-05;
        }
        else {
-         lp[3]=0.093*0.093;
-         if (info[0]==1) { lp[5]=-0.00014;}
-         else { lp[2]=0.0017*0.0017; lp[5]=-0.00004;}
+         lp[2]=4.80e-06;      // 0.00219*0.00219
+         lp[3]=0.0093;        // 0.0964*0.0964;
+         if (info[0]==1) {
+           lp[5]=-0.00014;
+         }
+         else { 
+           lp[2]=2.79e-06;    // 0.0017*0.0017; 
+           lp[3]=0.00935;     // 0.967*0.967;
+           lp[5]=-4.32e-05;
+         }
        }
 
        AliITSRecPoint * cl2;
@@ -1017,22 +1037,29 @@ FindClustersSSD(Ali1Dcluster* neg, Int_t nn,
            milab[3]=(((ip<<10) + in)<<10) + idet; // pos|neg|det
            Int_t info[3] = {pos[ip].GetNd(),neg[in].GetNd(),fNlayer[fModule]};
            
-       lp[2]=0.0022*0.0022;  //SigmaY2
-       lp[3]=0.110*0.110;  //SigmaZ2
+       lp[2]=4.968e-06;     // 0.00223*0.00223;  //SigmaY2
+       lp[3]=0.012;         // 0.110*0.110;  //SigmaZ2
        // out-of-diagonal element of covariance matrix
        if( (info[0]==1) && (info[1]==1) ) lp[5]=-0.00012;
        else if ( (info[0]>1) && (info[1]>1) ) { 
-         lp[2]=0.0016*0.0016;  //SigmaY2
-         lp[3]=0.08*0.08;  //SigmaZ2
-         lp[5]=-0.00006;
+         lp[2]=2.63e-06;    // 0.0016*0.0016;  //SigmaY2
+         lp[3]=0.0065;      // 0.08*0.08;   //SigmaZ2
+         lp[5]=-6.48e-05;
        }
        else {
-         lp[3]=0.093*0.093;
-         if (info[0]==1) { lp[5]=-0.00014;}
-         else { lp[2]=0.0017*0.0017; lp[5]=-0.00004;}
+         lp[2]=4.80e-06;      // 0.00219*0.00219
+         lp[3]=0.0093;        // 0.0964*0.0964;
+         if (info[0]==1) {
+           lp[5]=-0.00014;
+         }
+         else { 
+           lp[2]=2.79e-06;    // 0.0017*0.0017; 
+           lp[3]=0.00935;     // 0.967*0.967;
+           lp[5]=-4.32e-05;
+         }
        }
 
-           AliITSRecPoint * cl2;
+       AliITSRecPoint * cl2;
            if(clusters){
              
              cl2 = new (cl[ncl]) AliITSRecPoint(milab,lp,info);
@@ -1093,19 +1120,26 @@ FindClustersSSD(Ali1Dcluster* neg, Int_t nn,
            milab[3]=(((ip2<<10) + in)<<10) + idet; // pos|neg|det
            Int_t info[3] = {pos[ip2].GetNd(),neg[in].GetNd(),fNlayer[fModule]};
            
-       lp[2]=0.0022*0.0022;  //SigmaY2
-       lp[3]=0.110*0.110;  //SigmaZ2
+       lp[2]=4.968e-06;     // 0.00223*0.00223;  //SigmaY2
+       lp[3]=0.012;         // 0.110*0.110;  //SigmaZ2
        // out-of-diagonal element of covariance matrix
        if( (info[0]==1) && (info[1]==1) ) lp[5]=-0.00012;
        else if ( (info[0]>1) && (info[1]>1) ) { 
-         lp[2]=0.0016*0.0016;  //SigmaY2
-         lp[3]=0.08*0.08;  //SigmaZ2
-         lp[5]=-0.00006;
+         lp[2]=2.63e-06;    // 0.0016*0.0016;  //SigmaY2
+         lp[3]=0.0065;      // 0.08*0.08;   //SigmaZ2
+         lp[5]=-6.48e-05;
        }
        else {
-         lp[3]=0.093*0.093;
-         if (info[0]==1) { lp[5]=-0.00014;}
-         else { lp[2]=0.0017*0.0017; lp[5]=-0.00004;}
+         lp[2]=4.80e-06;      // 0.00219*0.00219
+         lp[3]=0.0093;        // 0.0964*0.0964;
+         if (info[0]==1) {
+           lp[5]=-0.00014;
+         }
+         else { 
+           lp[2]=2.79e-06;    // 0.0017*0.0017; 
+           lp[3]=0.00935;     // 0.967*0.967;
+           lp[5]=-4.32e-05;
+         }
        }
 
            AliITSRecPoint * cl2;
@@ -1202,19 +1236,26 @@ FindClustersSSD(Ali1Dcluster* neg, Int_t nn,
          milab[3]=(((ip<<10) + jn)<<10) + idet; // pos|neg|det
          Int_t info[3] = {pos[ip].GetNd(),neg[jn].GetNd(),fNlayer[fModule]};
 
-       lp[2]=0.0022*0.0022;  //SigmaY2
-       lp[3]=0.110*0.110;  //SigmaZ2
+       lp[2]=4.968e-06;     // 0.00223*0.00223;  //SigmaY2
+       lp[3]=0.012;         // 0.110*0.110;  //SigmaZ2
        // out-of-diagonal element of covariance matrix
        if( (info[0]==1) && (info[1]==1) ) lp[5]=-0.00012;
        else if ( (info[0]>1) && (info[1]>1) ) { 
-         lp[2]=0.0016*0.0016;  //SigmaY2
-         lp[3]=0.08*0.08;  //SigmaZ2
-         lp[5]=-0.00006;
+         lp[2]=2.63e-06;    // 0.0016*0.0016;  //SigmaY2
+         lp[3]=0.0065;      // 0.08*0.08;   //SigmaZ2
+         lp[5]=-6.48e-05;
        }
        else {
-         lp[3]=0.093*0.093;
-         if (info[0]==1) { lp[5]=-0.00014;}
-         else { lp[2]=0.0017*0.0017; lp[5]=-0.00004;}
+         lp[2]=4.80e-06;      // 0.00219*0.00219
+         lp[3]=0.0093;        // 0.0964*0.0964;
+         if (info[0]==1) {
+           lp[5]=-0.00014;
+         }
+         else { 
+           lp[2]=2.79e-06;    // 0.0017*0.0017; 
+           lp[3]=0.00935;     // 0.967*0.967;
+           lp[5]=-4.32e-05;
+         }
        }
 
          AliITSRecPoint * cl2;
@@ -1278,19 +1319,26 @@ FindClustersSSD(Ali1Dcluster* neg, Int_t nn,
          milab[3]=(((ip<<10) + jn2)<<10) + idet; // pos|neg|det
          Int_t info[3] = {pos[ip].GetNd(),neg[jn2].GetNd(),fNlayer[fModule]};
 
-       lp[2]=0.0022*0.0022;  //SigmaY2
-       lp[3]=0.110*0.110;  //SigmaZ2
+       lp[2]=4.968e-06;     // 0.00223*0.00223;  //SigmaY2
+       lp[3]=0.012;         // 0.110*0.110;  //SigmaZ2
        // out-of-diagonal element of covariance matrix
        if( (info[0]==1) && (info[1]==1) ) lp[5]=-0.00012;
        else if ( (info[0]>1) && (info[1]>1) ) { 
-         lp[2]=0.0016*0.0016;  //SigmaY2
-         lp[3]=0.08*0.08;  //SigmaZ2
-         lp[5]=-0.00006;
+         lp[2]=2.63e-06;    // 0.0016*0.0016;  //SigmaY2
+         lp[3]=0.0065;      // 0.08*0.08;   //SigmaZ2
+         lp[5]=-6.48e-05;
        }
        else {
-         lp[3]=0.093*0.093;
-         if (info[0]==1) { lp[5]=-0.00014;}
-         else { lp[2]=0.0017*0.0017; lp[5]=-0.00004;}
+         lp[2]=4.80e-06;      // 0.00219*0.00219
+         lp[3]=0.0093;        // 0.0964*0.0964;
+         if (info[0]==1) {
+           lp[5]=-0.00014;
+         }
+         else { 
+           lp[2]=2.79e-06;    // 0.0017*0.0017; 
+           lp[3]=0.00935;     // 0.967*0.967;
+           lp[5]=-4.32e-05;
+         }
        }
 
          AliITSRecPoint * cl2;
@@ -1418,19 +1466,26 @@ FindClustersSSD(Ali1Dcluster* neg, Int_t nn,
        milab[3]=(((ip<<10) + j)<<10) + idet; // pos|neg|det
        Int_t info[3] = {pos[ip].GetNd(),neg[j].GetNd(),fNlayer[fModule]};
 
-       lp[2]=0.0022*0.0022;  //SigmaY2
-       lp[3]=0.110*0.110;  //SigmaZ2
+       lp[2]=4.968e-06;     // 0.00223*0.00223;  //SigmaY2
+       lp[3]=0.012;         // 0.110*0.110;  //SigmaZ2
        // out-of-diagonal element of covariance matrix
        if( (info[0]==1) && (info[1]==1) ) lp[5]=-0.00012;
        else if ( (info[0]>1) && (info[1]>1) ) { 
-         lp[2]=0.0016*0.0016;  //SigmaY2
-         lp[3]=0.08*0.08;  //SigmaZ2
-         lp[5]=-0.00006;
+         lp[2]=2.63e-06;    // 0.0016*0.0016;  //SigmaY2
+         lp[3]=0.0065;      // 0.08*0.08;   //SigmaZ2
+         lp[5]=-6.48e-05;
        }
        else {
-         lp[3]=0.093*0.093;
-         if (info[0]==1) { lp[5]=-0.00014;}
-         else { lp[2]=0.0017*0.0017; lp[5]=-0.00004;}
+         lp[2]=4.80e-06;      // 0.00219*0.00219
+         lp[3]=0.0093;        // 0.0964*0.0964;
+         if (info[0]==1) {
+           lp[5]=-0.00014;
+         }
+         else { 
+           lp[2]=2.79e-06;    // 0.0017*0.0017; 
+           lp[3]=0.00935;     // 0.967*0.967;
+           lp[5]=-4.32e-05;
+         }
        }
 
        AliITSRecPoint * cl2;
@@ -1550,19 +1605,26 @@ FindClustersSSD(Ali1Dcluster* neg, Int_t nn,
        milab[3]=(((ip<<10) + j)<<10) + idet; // pos|neg|det
        Int_t info[3] = {pos[ip].GetNd(),neg[j].GetNd(),fNlayer[fModule]};
 
-       lp[2]=0.0022*0.0022;  //SigmaY2
-       lp[3]=0.110*0.110;  //SigmaZ2
+       lp[2]=4.968e-06;     // 0.00223*0.00223;  //SigmaY2
+       lp[3]=0.012;         // 0.110*0.110;  //SigmaZ2
        // out-of-diagonal element of covariance matrix
        if( (info[0]==1) && (info[1]==1) ) lp[5]=-0.00012;
        else if ( (info[0]>1) && (info[1]>1) ) { 
-         lp[2]=0.0016*0.0016;  //SigmaY2
-         lp[3]=0.08*0.08;  //SigmaZ2
-         lp[5]=-0.00006;
+         lp[2]=2.63e-06;    // 0.0016*0.0016;  //SigmaY2
+         lp[3]=0.0065;      // 0.08*0.08;   //SigmaZ2
+         lp[5]=-6.48e-05;
        }
        else {
-         lp[3]=0.093*0.093;
-         if (info[0]==1) { lp[5]=-0.00014;}
-         else { lp[2]=0.0017*0.0017; lp[5]=-0.00004;}
+         lp[2]=4.80e-06;      // 0.00219*0.00219
+         lp[3]=0.0093;        // 0.0964*0.0964;
+         if (info[0]==1) {
+           lp[5]=-0.00014;
+         }
+         else { 
+           lp[2]=2.79e-06;    // 0.0017*0.0017; 
+           lp[3]=0.00935;     // 0.967*0.967;
+           lp[5]=-4.32e-05;
+         }
        }
 
        AliITSRecPoint * cl2;
@@ -1622,8 +1684,8 @@ FindClustersSSD(Ali1Dcluster* neg, Int_t nn,
       Float_t xt, zt;
       seg->GetPadCxz(yn, yp, xt, zt);
       
-      if (TMath::Abs(xt)<hwSSD+0.01)
-      if (TMath::Abs(zt)<hlSSD+0.01*(neg[j].GetNd()+pos[i].GetNd())) {
+      if (TMath::Abs(xt)<hwSSD)
+      if (TMath::Abs(zt)<hlSSD) {
        xbest=xt; zbest=zt; 
 
         qbest=0.5*(pos[i].GetQ()+neg[j].GetQ());
@@ -1645,19 +1707,26 @@ FindClustersSSD(Ali1Dcluster* neg, Int_t nn,
        milab[3]=(((i<<10) + j)<<10) + idet; // pos|neg|det
        Int_t info[3] = {pos[i].GetNd(),neg[j].GetNd(),fNlayer[fModule]};
 
-       lp[2]=0.0022*0.0022;  //SigmaY2
-       lp[3]=0.110*0.110;  //SigmaZ2
+       lp[2]=4.968e-06;     // 0.00223*0.00223;  //SigmaY2
+       lp[3]=0.012;         // 0.110*0.110;  //SigmaZ2
        // out-of-diagonal element of covariance matrix
        if( (info[0]==1) && (info[1]==1) ) lp[5]=-0.00012;
        else if ( (info[0]>1) && (info[1]>1) ) { 
-         lp[2]=0.0016*0.0016;  //SigmaY2
-         lp[3]=0.08*0.08;  //SigmaZ2
-         lp[5]=-0.00006;
+         lp[2]=2.63e-06;    // 0.0016*0.0016;  //SigmaY2
+         lp[3]=0.0065;      // 0.08*0.08;   //SigmaZ2
+         lp[5]=-6.48e-05;
        }
        else {
-         lp[3]=0.093*0.093;
-         if (info[0]==1) { lp[5]=-0.00014;}
-         else { lp[2]=0.0017*0.0017; lp[5]=-0.00004;}
+         lp[2]=4.80e-06;      // 0.00219*0.00219
+         lp[3]=0.0093;        // 0.0964*0.0964;
+         if (info[0]==1) {
+           lp[5]=-0.00014;
+         }
+         else { 
+           lp[2]=2.79e-06;    // 0.0017*0.0017; 
+           lp[3]=0.00935;     // 0.967*0.967;
+           lp[5]=-4.32e-05;
+         }
        }
 
        AliITSRecPoint * cl2;
@@ -1719,7 +1788,7 @@ FindClustersSSD(Ali1Dcluster* neg, Int_t nn,
            //----------
            // bad Pstrip is crossing the Nside 1Dcluster -> create recpoint
            // 
-           if ( (TMath::Abs(xt)<hwSSD+0.01) && (TMath::Abs(zt)<hlSSD+0.01) ) {
+           if ( (TMath::Abs(xt)<hwSSD) && (TMath::Abs(zt)<hlSSD) ) {
              Double_t loc[3]={xt,0.,zt},trk[3]={0.,0.,0.};
              mT2L->MasterToLocal(loc,trk);
              lp[0]=trk[1];
@@ -1731,14 +1800,15 @@ FindClustersSSD(Ali1Dcluster* neg, Int_t nn,
              milab[3]=( (i<<10) << 10 ) + idet; // pos|neg|det
              Int_t info[3] = {pos[i].GetNd(),0,fNlayer[fModule]};
              
-             // out-of-diagonal element of covariance matrix
-             if (info[0]==1) lp[5]=0.0065;
-             else lp[5]=0.0093;
-             
-             lp[2]=0.0022*0.0022;  //SigmaY2
-             lp[3]=0.110*0.110;  //SigmaZ2
+             lp[2]=4.968e-06;     // 0.00223*0.00223;  //SigmaY2
+             lp[3]=0.012;         // 0.110*0.110;  //SigmaZ2
              lp[5]=-0.00012; // out-of-diagonal element of covariance matrix
-             
+             if (info[0]>1) {
+               lp[2]=4.80e-06;
+               lp[3]=0.0093;
+               lp[5]=0.00014;
+             }
+                     
              AliITSRecPoint * cl2;
              if(clusters){
                cl2 = new (cl[ncl]) AliITSRecPoint(milab,lp,info);          
@@ -1776,7 +1846,7 @@ FindClustersSSD(Ali1Dcluster* neg, Int_t nn,
            //----------
            // bad Nstrip is crossing the Pside 1Dcluster -> create recpoint
            // 
-           if ( (TMath::Abs(xt)<hwSSD+0.01) && (TMath::Abs(zt)<hlSSD+0.01) ) {
+           if ( (TMath::Abs(xt)<hwSSD) && (TMath::Abs(zt)<hlSSD) ) {
              Double_t loc[3]={xt,0.,zt},trk[3]={0.,0.,0.};
              mT2L->MasterToLocal(loc,trk);
              lp[0]=trk[1];
@@ -1788,9 +1858,14 @@ FindClustersSSD(Ali1Dcluster* neg, Int_t nn,
              milab[3]=( j << 10 ) + idet; // pos|neg|det
              Int_t info[3]={0,(Int_t)neg[j].GetNd(),fNlayer[fModule]};
              
-             lp[2]=0.0022*0.0022;  //SigmaY2
-             lp[3]=0.110*0.110;  //SigmaZ2
+             lp[2]=4.968e-06;     // 0.00223*0.00223;  //SigmaY2
+             lp[3]=0.012;         // 0.110*0.110;  //SigmaZ2
              lp[5]=-0.00012; // out-of-diagonal element of covariance matrix
+             if (info[0]>1) {
+               lp[2]=2.79e-06;
+               lp[3]=0.00935;
+               lp[5]=-4.32e-05;
+             }
              
              AliITSRecPoint * cl2;
              if(clusters){
@@ -1829,7 +1904,7 @@ FindClustersSSD(Ali1Dcluster* neg, Int_t nn,
        else yP = yN - (7.6/1.9);
        seg->GetPadCxz(yP, yN, xt, zt); 
        
-       if ( (TMath::Abs(xt)<hwSSD+0.01) && (TMath::Abs(zt)<hlSSD+0.01) ) {
+       if ( (TMath::Abs(xt)<hwSSD) && (TMath::Abs(zt)<hlSSD) ) {
          Double_t loc[3]={xt,0.,zt},trk[3]={0.,0.,0.};
          mT2L->MasterToLocal(loc,trk);
          lp[0]=trk[1];
@@ -1841,10 +1916,11 @@ FindClustersSSD(Ali1Dcluster* neg, Int_t nn,
          milab[3]=( (i<<10) << 10 ) + idet; // pos|neg|det
          Int_t info[3] = {(Int_t)pos[i].GetNd(),0,fNlayer[fModule]};
          
-         lp[2]=0.031*0.031;  //SigmaY2
-         lp[3]=1.15*1.15;  //SigmaZ2
-         lp[5]=-0.036;
-         
+         lp[2]=0.00098;    // 0.031*0.031;  //SigmaY2
+         lp[3]=1.329;      // 1.15*1.15;  //SigmaZ2
+         lp[5]=-0.0359;
+         if(info[0]>1) lp[2]=0.00097;
+
          AliITSRecPoint * cl2;
          if(clusters){
            cl2 = new (cl[ncl]) AliITSRecPoint(milab,lp,info);      
@@ -1878,7 +1954,7 @@ FindClustersSSD(Ali1Dcluster* neg, Int_t nn,
        else yN = yP + (7.6/1.9);
        seg->GetPadCxz(yP, yN, xt, zt); 
        
-       if ( (TMath::Abs(xt)<hwSSD+0.01) && (TMath::Abs(zt)<hlSSD+0.01) ) {
+       if ( (TMath::Abs(xt)<hwSSD) && (TMath::Abs(zt)<hlSSD) ) {
          Double_t loc[3]={xt,0.,zt},trk[3]={0.,0.,0.};
          mT2L->MasterToLocal(loc,trk);
          lp[0]=trk[1];
@@ -1890,9 +1966,10 @@ FindClustersSSD(Ali1Dcluster* neg, Int_t nn,
          milab[3]=( j << 10 ) + idet; // pos|neg|det
          Int_t info[3] = {0,(Int_t)neg[j].GetNd(),fNlayer[fModule]};
          
-         lp[2]=0.0085*0.0085;  //SigmaY2
-         lp[3]=1.15*1.15;  //SigmaZ2
-         lp[5]=0.0093;
+         lp[2]=7.27e-05;   // 0.0085*0.0085;  //SigmaY2
+         lp[3]=1.33;       // 1.15*1.15;  //SigmaZ2
+         lp[5]=0.00931;
+         if(info[1]>1) lp[2]=6.91e-05;
          
          AliITSRecPoint * cl2;
          if(clusters){
@@ -1929,3 +2006,4 @@ FindClustersSSD(Ali1Dcluster* neg, Int_t nn,
   delete [] positivepair;
 
 }
+