[Rivet-svn] r2344 - trunk/src/Analyses

[blackhole at projects.hepforge.org]

Author: fsiegert
Date: Fri Mar 19 13:27:57 2010
New Revision: 2344

Log:
Small performance improvement.

Modified:
   trunk/src/Analyses/D0_2009_S8349509.cc

Modified: trunk/src/Analyses/D0_2009_S8349509.cc
==============================================================================
--- trunk/src/Analyses/D0_2009_S8349509.cc	Thu Mar 18 19:03:06 2010	(r2343)
+++ trunk/src/Analyses/D0_2009_S8349509.cc	Fri Mar 19 13:27:57 2010	(r2344)
@@ -16,7 +16,8 @@
     //@{
 
     /// Constructor
-    D0_2009_S8349509() : Analysis("D0_2009_S8349509")
+    D0_2009_S8349509() : Analysis("D0_2009_S8349509"),
+                         _inclusive_Z_sumofweights(0.0)
     {
       setBeams(PROTON, ANTIPROTON);
     }
@@ -55,6 +56,11 @@
       if (zfinder.particles().size()==1) {
         // count inclusive sum of weights for histogram normalisation
         _inclusive_Z_sumofweights += weight;
+        
+        const FourMomentum Zmom = zfinder.particles()[0].momentum();
+        if (Zmom.pT()<25.0*GeV) {
+          vetoEvent;
+        }
      
         Jets jets;
         foreach (const Jet& j, applyProjection<JetAlg>(event, "ConeFinder").jetsByPt(20.0*GeV)) {
@@ -80,7 +86,6 @@
           }
         }
      
-        const FourMomentum Zmom = zfinder.particles()[0].momentum();
         const FourMomentum jetmom = jets[0].momentum();
         double yZ = Zmom.rapidity();
         double yjet = jetmom.rapidity();