correct error parameterization for pad row cross
authorabercuci <abercuci@f7af4fe6-9843-0410-8265-dc069ae4e863>
Thu, 14 May 2009 09:56:28 +0000 (09:56 +0000)
committerabercuci <abercuci@f7af4fe6-9843-0410-8265-dc069ae4e863>
Thu, 14 May 2009 09:56:28 +0000 (09:56 +0000)
TRD/AliTRDseedV1.cxx

index 0553c38..8ca2a6b 100644 (file)
@@ -1160,7 +1160,10 @@ Bool_t AliTRDseedV1::Fit(Bool_t tilt, Bool_t zcorr)
     }
 
     fZfit[0] = .5*(zc[0]+zc[kNclusters-1]); fZfit[1] = 0.;
-    fS2Z     = 0.5+0.4*fZref[1]; fS2Z *= fS2Z;
+    // temporary external error parameterization
+    fS2Z     = 0.05+0.4*TMath::Abs(fZref[1]); fS2Z *= fS2Z;
+    // TODO correct formula
+    //fS2Z     = sigma_x*TMath::Abs(fZref[1]);
   } else {
     fZfit[0] = zc[0]; fZfit[1] = 0.;
     fS2Z     = GetPadLength()*GetPadLength()/12.;