Author: [log in to unmask]
Date: Wed Sep 9 11:32:36 2015
New Revision: 3561
Log:
First pass at a Driver to skim Møller candidates. Work in progress to tighten cuts.
Added:
java/trunk/analysis/src/main/java/org/hps/analysis/skim/
java/trunk/analysis/src/main/java/org/hps/analysis/skim/StripMollerEventsDriver.java
- copied, changed from r3560, java/trunk/analysis/src/main/java/org/hps/analysis/examples/StripMollerEventsDriver.java
Copied: java/trunk/analysis/src/main/java/org/hps/analysis/skim/StripMollerEventsDriver.java (from r3560, java/trunk/analysis/src/main/java/org/hps/analysis/examples/StripMollerEventsDriver.java)
=============================================================================
--- java/trunk/analysis/src/main/java/org/hps/analysis/examples/StripMollerEventsDriver.java (original)
+++ java/trunk/analysis/src/main/java/org/hps/analysis/skim/StripMollerEventsDriver.java Wed Sep 9 11:32:36 2015
@@ -12,12 +12,10 @@
/**
* Class to strip off Moller candidates
- * Currently defined as:
- * e- e- events
- * non-full-energy electrons
- * momentum sum between 0.85 and 1.3 GeV
- * six-hit tracks and
- * nothing else in the event
+ * Currently defined as:
+ * e- e- events
+ * non-full-energy electrons, E < fullEnergyCut [0.85 GeV]
+ * momentum sum between molPSumMin [0.85 GeV] and molPSumMax [1.3 GeV]
*
* @author Norman A Graf
*
@@ -26,76 +24,80 @@
public class StripMollerEventsDriver extends Driver
{
- private String finalStateParticlesColName = "FinalStateParticles";
+ private String finalStateParticlesColName = "TargetConstrainedMollerCandidates";
private int _numberOfEventsWritten = 0;
-
+ private int _numberOfEventsProcessed = 0;
private boolean debug;
double molPSumMin = 0.85;
double molPSumMax = 1.3;
- double beambeamCut = 0.85;
+ double fullEnergyCut = 0.85;
@Override
protected void process(EventHeader event)
{
boolean skipEvent = true;
+ _numberOfEventsProcessed++;
if (event.hasCollection(ReconstructedParticle.class, finalStateParticlesColName)) {
- List<ReconstructedParticle> finalStateParticles = event.get(ReconstructedParticle.class, finalStateParticlesColName);
- if (debug) {
- System.out.println("This events has " + finalStateParticles.size() + " final state particles");
+ List<ReconstructedParticle> mollerCandidates = event.get(ReconstructedParticle.class, finalStateParticlesColName);
+ if (mollerCandidates.size() > 0) {
+ if (debug) {
+ System.out.println("This events has " + mollerCandidates.size() + " Møller Candidates");
+ }
+ for (ReconstructedParticle rp : mollerCandidates) {
+ System.out.println("Moller candidate: " + rp);
+ }
+ skipEvent = false;
}
- // require two and only two ReconstructedParticles
- // require no other tracks in the event
- // require no other clusters in the event
- if (finalStateParticles.size() == 2
- && event.get(Track.class, "MatchedTracks").size() == 2
- && event.get(Cluster.class, "EcalClustersGTP").size() == 2) {
- // at this point we should have two and only two good particles in the event
- // let's see what they are...
- ReconstructedParticle ele1 = null;
- ReconstructedParticle ele2 = null;
- int sumCharge = 0;
- int numChargedParticles = 0;
- for (ReconstructedParticle fsPart : finalStateParticles) {
- if (debug) {
- System.out.println("PDGID = " + fsPart.getParticleIDUsed() + "; charge = " + fsPart.getCharge() + "; pz = " + fsPart.getMomentum().x());
- }
- double charge = fsPart.getCharge();
- sumCharge += charge;
- if (charge != 0) {
- numChargedParticles++;
- if (charge < 1) {
- if (ele1 == null) {
- ele1 = fsPart;
- } else {
- ele2 = fsPart;
- }
- }
- }
- }
-
- if (ele1 != null && ele2 != null) {
- Hep3Vector p1 = ele1.getMomentum();
- Hep3Vector p2 = ele2.getMomentum();
- Hep3Vector beamAxis = new BasicHep3Vector(Math.sin(0.0305), 0, Math.cos(0.0305));
- double theta1 = Math.acos(VecOp.dot(p1, beamAxis) / p1.magnitude());
- double theta2 = Math.acos(VecOp.dot(p2, beamAxis) / p2.magnitude());
- //look at "Moller" events (if that's what they really are)
- if (ele1.getMomentum().magnitude() + ele2.getMomentum().magnitude() > molPSumMin
- && ele1.getMomentum().magnitude() + ele2.getMomentum().magnitude() < molPSumMax
- && (p1.magnitude() < beambeamCut && p2.magnitude() < beambeamCut)) {
-
- // require that both tracks have six hits
- Track ele1trk = ele1.getTracks().get(0);
- Track ele2trk = ele2.getTracks().get(0);
- if (ele1trk.getTrackerHits().size() == 6
- && ele2trk.getTrackerHits().size() == 6) {
- // OK. we should be golden here
- skipEvent = false;
- }
- }
- }
- }
+// if (mollerCandidates.size() == 2
+// && event.get(Track.class, "MatchedTracks").size() == 2
+// && event.get(Cluster.class, "EcalClustersGTP").size() == 2) {
+// // at this point we should have two and only two good particles in the event
+// // let's see what they are...
+// ReconstructedParticle ele1 = null;
+// ReconstructedParticle ele2 = null;
+// int sumCharge = 0;
+// int numChargedParticles = 0;
+// for (ReconstructedParticle fsPart : mollerCandidates) {
+// if (debug) {
+// System.out.println("PDGID = " + fsPart.getParticleIDUsed() + "; charge = " + fsPart.getCharge() + "; pz = " + fsPart.getMomentum().x());
+// }
+// double charge = fsPart.getCharge();
+// sumCharge += charge;
+// if (charge != 0) {
+// numChargedParticles++;
+// if (charge < 1) {
+// if (ele1 == null) {
+// ele1 = fsPart;
+// } else {
+// ele2 = fsPart;
+// }
+// }
+// }
+// }
+//
+// if (ele1 != null && ele2 != null) {
+// Hep3Vector p1 = ele1.getMomentum();
+// Hep3Vector p2 = ele2.getMomentum();
+// Hep3Vector beamAxis = new BasicHep3Vector(Math.sin(0.0305), 0, Math.cos(0.0305));
+// double theta1 = Math.acos(VecOp.dot(p1, beamAxis) / p1.magnitude());
+// double theta2 = Math.acos(VecOp.dot(p2, beamAxis) / p2.magnitude());
+// //look at "Moller" events (if that's what they really are)
+// if (ele1.getMomentum().magnitude() + ele2.getMomentum().magnitude() > molPSumMin
+// && ele1.getMomentum().magnitude() + ele2.getMomentum().magnitude() < molPSumMax
+// && (p1.magnitude() < fullEnergyCut && p2.magnitude() < fullEnergyCut)) {
+//
+// // require that both tracks have six hits
+// Track ele1trk = ele1.getTracks().get(0);
+// Track ele2trk = ele2.getTracks().get(0);
+// if (ele1trk.getTrackerHits().size() == 6
+// && ele2trk.getTrackerHits().size() == 6) {
+// // OK. we should be golden here
+// skipEvent = false;
+// }
+// }
+// }
+// }
}
if (skipEvent) {
@@ -106,17 +108,9 @@
}
}
- private double getMomentum(Track trk)
- {
- double px = trk.getTrackStates().get(0).getMomentum()[0];
- double py = trk.getTrackStates().get(0).getMomentum()[1];
- double pz = trk.getTrackStates().get(0).getMomentum()[2];
- return Math.sqrt(px * px + py * py + pz * pz);
- }
-
@Override
protected void endOfData()
{
- System.out.println("Wrote " + _numberOfEventsWritten + " events");
+ System.out.println("Wrote " + _numberOfEventsWritten + " Møller candidate events out of "+_numberOfEventsProcessed+" events processed");
}
}
