DReaction_factory_p4pi_hists.cc

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// $Id$
//
//    File: DReaction_factory_p4pi_hists.cc
// Created: Mon Aug 29 16:20:57 EDT 2016
// Creator: aaustreg (on Linux halld01.jlab.org 2.6.32-642.3.1.el6.x86_64 x86_64)
//


#include "DReaction_factory_p4pi_hists.h"

//------------------
// brun
//------------------
jerror_t DReaction_factory_p4pi_hists::brun(JEventLoop* locEventLoop, int32_t locRunNumber)
{
   vector<double> locBeamPeriodVector;
   locEventLoop->GetCalib("PHOTON_BEAM/RF/beam_period", locBeamPeriodVector);
   dBeamBunchPeriod = locBeamPeriodVector[0];

   return NOERROR;
}

//------------------
// evnt
//------------------
jerror_t DReaction_factory_p4pi_hists::evnt(JEventLoop* locEventLoop, uint64_t locEventNumber)
{
   // Make as many DReaction objects as desired
   DReactionStep* locReactionStep = NULL;
   DReaction* locReaction = NULL; //create with a unique name for each DReaction object. CANNOT (!) be "Thrown"

   // DOCUMENTATION:
   // ANALYSIS library: https://halldweb1.jlab.org/wiki/index.php/GlueX_Analysis_Software
   // DReaction factory: https://halldweb1.jlab.org/wiki/index.php/Analysis_DReaction

   /************************************************** p4pi_hists Reaction Definition *************************************************/

   locReaction = new DReaction("p4pi_hists");

   
   //Required: DReactionSteps to specify the channel and decay chain you want to study
   //Particles are of type Particle_t, an enum defined in sim-recon/src/libraries/include/particleType.h
   
   // g, p -> pi+, pi-, pi+, pi-, p
   locReactionStep = new DReactionStep();
   locReactionStep->Set_InitialParticleID(Gamma);
   locReactionStep->Set_TargetParticleID(Proton);
   locReactionStep->Add_FinalParticleID(PiPlus);
   locReactionStep->Add_FinalParticleID(PiMinus);
   locReactionStep->Add_FinalParticleID(PiPlus);
   locReactionStep->Add_FinalParticleID(PiMinus);
   locReactionStep->Add_FinalParticleID(Proton);
   locReaction->Add_ReactionStep(locReactionStep);
   dReactionStepPool.push_back(locReactionStep); //register so will be deleted later: prevent memory leak


   /**************************************************** p4pi_hists Control Settings ****************************************************/

   // Highly Recommended: Set EventStore skim query (use with "eventstore" source)
   // This will skip creating particle combos for events that aren't in the skims you list
   // Query should be comma-separated list of skims to boolean-AND together
   locReaction->Set_EventStoreSkims("3q+,2q-"); //boolean-AND of skims

   // Recommended: Type of kinematic fit to perform (default is d_NoFit)
   //fit types are of type DKinFitType, an enum defined in sim-recon/src/libraries/ANALYSIS/DReaction.h
   //Options: d_NoFit (default), d_P4Fit, d_VertexFit, d_P4AndVertexFit
   //P4 fits automatically constrain decaying particle masses, unless they are manually disabled
   locReaction->Set_KinFitType(d_P4AndVertexFit);

   // Highly Recommended: When generating particle combinations, reject all beam photons that match to a different RF bunch
   locReaction->Set_NumPlusMinusRFBunches(0);


   // Highly Recommended: Cut on number of extra "good" tracks. "Good" tracks are ones that survive the "PreSelect" (or user custom) factory.
   // Important: Keep cut large: Can have many ghost and accidental tracks that look "good"
   locReaction->Set_MaxExtraGoodTracks(4);

   // Highly Recommended: Enable ROOT TTree output for this DReaction
   // string is file name (must end in ".root"!!): doen't need to be unique, feel free to change
   // locReaction->Enable_TTreeOutput("tree_p4pi_hists.root", false); //true/false: do/don't save unused hypotheses

   /**************************************************** p4pi_hists Analysis Actions ****************************************************/

   
   // Recommended: Analysis actions automatically performed by the DAnalysisResults factories to histogram useful quantities.
   //These actions are executed sequentially, and are executed on each surviving (non-cut) particle combination 
   //Pre-defined actions can be found in ANALYSIS/DHistogramActions_*.h and ANALYSIS/DCutActions.h
   //If a histogram action is repeated, it should be created with a unique name (string) to distinguish them
   
   // HISTOGRAM PID
   locReaction->Add_AnalysisAction(new DHistogramAction_PID(locReaction, false));

   // CUT PID
   // SYS_TOF, SYS_BCAL, SYS_FCAL, ...: DetectorSystem_t: Defined in libraries/include/GlueX.h
   locReaction->Add_AnalysisAction(new DCutAction_PIDDeltaT(locReaction, false, 2.0, PiPlus, SYS_TOF)); //false: measured data
   locReaction->Add_AnalysisAction(new DCutAction_PIDDeltaT(locReaction, false, 2.5, PiPlus, SYS_BCAL)); //false: measured data
   locReaction->Add_AnalysisAction(new DCutAction_PIDDeltaT(locReaction, false, 3.0, PiPlus, SYS_FCAL)); //false: measured data
   
   locReaction->Add_AnalysisAction(new DCutAction_PIDDeltaT(locReaction, false, 2.0, PiMinus, SYS_TOF)); //false: measured data
   locReaction->Add_AnalysisAction(new DCutAction_PIDDeltaT(locReaction, false, 2.5, PiMinus, SYS_BCAL)); //false: measured data
   locReaction->Add_AnalysisAction(new DCutAction_PIDDeltaT(locReaction, false, 3.0, PiMinus, SYS_FCAL)); //false: measured data
   
   locReaction->Add_AnalysisAction(new DCutAction_PIDDeltaT(locReaction, false, 2.5, Proton, SYS_TOF)); //false: measured data
   locReaction->Add_AnalysisAction(new DCutAction_PIDDeltaT(locReaction, false, 2.5, Proton, SYS_BCAL)); //false: measured data
   locReaction->Add_AnalysisAction(new DCutAction_PIDDeltaT(locReaction, false, 3.0, Proton, SYS_FCAL)); //false: measured data
   
   locReaction->Add_AnalysisAction(new DHistogramAction_PID(locReaction, false, "PostPIDCuts"));

   // HISTOGRAM MASSES //false/true: measured/kinfit data
   locReaction->Add_AnalysisAction(new DHistogramAction_MissingMassSquared(locReaction, false, 800, -0.04, 0.04));
   
   // Kinematics
   locReaction->Add_AnalysisAction(new DHistogramAction_ParticleComboKinematics(locReaction, false));
   locReaction->Add_AnalysisAction(new DHistogramAction_TrackVertexComparison(locReaction));
   
   // KINEMATIC FIT
   locReaction->Add_AnalysisAction(new DHistogramAction_KinFitResults(locReaction, 0.05, true)); //5% confidence level cut on pull histograms only
   locReaction->Add_AnalysisAction(new DCutAction_KinFitFOM(locReaction, 5.73303E-7)); // confidence level cut //+/- 5 sigma

   // Cut for the Invariant Mass Plots
   locReaction->Add_AnalysisAction(new DCutAction_MissingMassSquared(locReaction, false, -0.005, 0.005));
   
   // PARTICLE COMBINATIONS
   std::deque<Particle_t> Four, Two, Zp, Zm;
   Four.push_back(PiPlus); Four.push_back(PiMinus); Four.push_back(PiPlus); Four.push_back(PiMinus);
   Two.push_back(PiPlus); Two.push_back(PiMinus);
   Zp.push_back(PiPlus); Zp.push_back(Proton);
   Zm.push_back(PiMinus); Zm.push_back(Proton);
   locReaction->Add_AnalysisAction(new DHistogramAction_InvariantMass(locReaction, 0, Four, false, 500, 0.5, 2.5, "FourPi"));
   locReaction->Add_AnalysisAction(new DHistogramAction_InvariantMass(locReaction, 0, Two, false, 500, 0.0, 2.0, "TwoPi"));
   locReaction->Add_AnalysisAction(new DHistogramAction_2DInvariantMass(locReaction, 0, Two, Two, false, 400, 0.2, 2.2, 400, 0.2, 2.2, "TwoPi_vs_TwoPi"));
   locReaction->Add_AnalysisAction(new DHistogramAction_Dalitz(locReaction, 0, Two, Two, false, 600, 0, 3, 600, 0, 3, "Dalitz"));
   locReaction->Add_AnalysisAction(new DHistogramAction_InvariantMass(locReaction, 0, Zp, false, 500, 1.0, 3.0, "ProtonPip"));
   locReaction->Add_AnalysisAction(new DHistogramAction_InvariantMass(locReaction, 0, Zm, false, 500, 1.0, 3.0, "ProtonPim"));
      
   _data.push_back(locReaction); //Register the DReaction with the factory

   return NOERROR;
}

//------------------
// fini
//------------------
jerror_t DReaction_factory_p4pi_hists::fini(void)
{
   for(size_t loc_i = 0; loc_i < dReactionStepPool.size(); ++loc_i)
      delete dReactionStepPool[loc_i]; //cleanup memory
   return NOERROR;
}