add 500 MeV ECAL requirement

Author: baltzell

reconstruction/eb/src/main/java/org/jlab/rec/eb/EBUtil.java

@@ -118,7 +118,8 @@ public static boolean isZeroFieldElectron(DetectorParticle p,EBCCDBConstants ccd
         final double pcalEnergy = p.getEnergy(DetectorType.ECAL,DetectorLayer.PCAL);
         if (pcalEnergy < minPcalEnergy) return false;
 
-        return true;
+        // require PCAL+ECAL minimum energy 500 MeV:
+        return p.getEnergy(DetectorType.ECAL) > 0.5;
     }
 
     /**

reconstruction/eb/src/main/java/org/jlab/service/eb/EventBuilder.java

@@ -482,7 +482,8 @@ public int getSoftwareTriggerScore(DetectorParticle p,EBCCDBConstants ccdb,float
             final double nsigma = SamplingFractions.getNSigma(11,p,ccdb);
             final double minPcalEnergy = ccdb.getSectorDouble(EBCCDBEnum.ELEC_PCAL_min_energy,sector);
             if (Math.abs(torus) <1e-8) {
-                if (p.getEnergy(DetectorType.ECAL,1) > minPcalEnergy) {
+                if (p.getEnergy(DetectorType.ECAL,1) > minPcalEnergy &&
+                    p.getEnergy(DetectorType.ECAL) > 0.5) {
                     score += 100;
                 }
             }