DReaction_factory_p2pi_hists.cc

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// $Id$
//
//    File: DReaction_factory_p2pi_hists.cc
// Created: Wed Mar 11 20:34:14 EDT 2015
// Creator: jrsteven (on Linux halldw1.jlab.org 2.6.32-504.8.1.el6.x86_64 x86_64)
//

#include "DReaction_factory_p2pi_hists.h"

//------------------
// brun
//------------------
jerror_t DReaction_factory_p2pi_hists::brun(JEventLoop* locEventLoop, int32_t locRunNumber)
{
   vector<double> locBeamPeriodVector;
   locEventLoop->GetCalib("PHOTON_BEAM/RF/beam_period", locBeamPeriodVector);
   dBeamBunchPeriod = locBeamPeriodVector[0];

   return NOERROR;
}

//------------------
// init
//------------------
jerror_t DReaction_factory_p2pi_hists::evnt(JEventLoop* locEventLoop, uint64_t locEventNumber)
{
   // Make as many DReaction objects as desired
   DReactionStep* locReactionStep = NULL;
   DReaction* locReaction = new DReaction("p2pi_pmiss"); //needs to be 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

   /**************************************************** p2pi_preco Reaction Steps ****************************************************/

   bool unused = false;
   locReaction = new DReaction("p2pi_preco"); //needs to be a unique name for each DReaction object, CANNOT (!) be "Thrown"

   // g, p -> pi+, pi- ,p
   locReactionStep = new DReactionStep();
   locReactionStep->Set_InitialParticleID(Gamma);
   locReactionStep->Set_TargetParticleID(Proton);
   locReactionStep->Add_FinalParticleID(Proton);
   locReactionStep->Add_FinalParticleID(PiPlus);
   locReactionStep->Add_FinalParticleID(PiMinus);
   locReaction->Add_ReactionStep(locReactionStep);
   dReactionStepPool.push_back(locReactionStep); //register so will be deleted later: prevent memory leak

   /**************************************************** p2pi_preco Control Settings ****************************************************/

   // Event Store
   locReaction->Set_EventStoreSkims("2q+,q-"); // boolean-AND of skims

   // Kinematic Fit
   //locReaction->Set_KinFitType(d_NoFit); //simultaneously constrain apply four-momentum conservation, invariant masses, and common-vertex constraints

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

   /**************************************************** p2pi_preco 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
   
   // PID
   locReaction->Add_AnalysisAction(new DHistogramAction_PID(locReaction, false));

   // Custom histograms for p2pi
   locReaction->Add_AnalysisAction(new DCustomAction_p2pi_hists(locReaction, false));

   //MISSING MASS
   locReaction->Add_AnalysisAction(new DHistogramAction_MissingMassSquared(locReaction, false, 1000, -0.1, 0.1));
   locReaction->Add_AnalysisAction(new DCutAction_MissingMassSquared(locReaction, false, -0.01, 0.005));

   // RHO
   deque<Particle_t> locRhoPIDs;  locRhoPIDs.push_back(PiPlus);  locRhoPIDs.push_back(PiMinus);
   locReaction->Add_AnalysisAction(new DHistogramAction_InvariantMass(locReaction, 0, locRhoPIDs, false, 900, 0.3, 1.2, "Rho"));

   if(unused)
   {
      // Custom cuts (can be applied in TSelector)
      locReaction->Add_AnalysisAction(new DCustomAction_p2pi_cuts(locReaction, false));

      // Diagnostics for unused tracks and showers with final selection (only useful when analyzing EVIO data)
      locReaction->Add_AnalysisAction(new DCustomAction_p2pi_unusedHists(locReaction, false, "Unused"));
   }

   // Kinematics of final selection
   locReaction->Add_AnalysisAction(new DHistogramAction_ParticleComboKinematics(locReaction, false)); //false: fill histograms with measured particle data

   _data.push_back(locReaction); //Register the DReaction with the factory



   /**************************************************** p2pi_preco_kinfit Reaction Steps ****************************************************/

   locReaction = new DReaction("p2pi_preco_kinfit"); //needs to be a unique name for each DReaction object, CANNOT (!) be "Thrown"

   // g, p -> pi+, pi- ,p
   locReaction->Add_ReactionStep(locReactionStep);

   /**************************************************** p2pi_preco_kinfit Control Settings ****************************************************/

   // Event Store
   locReaction->Set_EventStoreSkims("2q+,q-"); // boolean-AND of skims

   // Kinematic Fit
   locReaction->Set_KinFitType(d_P4AndVertexFit); //simultaneously constrain apply four-momentum conservation, invariant masses, and common-vertex constraints

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

   /**************************************************** p2pi_preco_kinfit 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

   // PID
   locReaction->Add_AnalysisAction(new DHistogramAction_PID(locReaction, false));

   //MASSES
   locReaction->Add_AnalysisAction(new DHistogramAction_MissingMassSquared(locReaction, false, 1000, -0.1, 0.1));
   locReaction->Add_AnalysisAction(new DHistogramAction_InvariantMass(locReaction, 0, locRhoPIDs, false, 900, 0.3, 1.2, "Rho"));
   locReaction->Add_AnalysisAction(new DHistogramAction_InvariantMass(locReaction, 0, locRhoPIDs, true, 900, 0.3, 1.2, "Rho_KinFit"));

   // Kinematic Fit Results
   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

   // MASSES, POST-KINFIT
   locReaction->Add_AnalysisAction(new DHistogramAction_MissingMassSquared(locReaction, false, 1000, -0.1, 0.1, "PostKinFitCut"));
   locReaction->Add_AnalysisAction(new DHistogramAction_InvariantMass(locReaction, 0, locRhoPIDs, false, 900, 0.3, 1.2, "Rho_PostKinFitCut"));
   locReaction->Add_AnalysisAction(new DHistogramAction_InvariantMass(locReaction, 0, locRhoPIDs, true, 900, 0.3, 1.2, "Rho_KinFit_PostKinFitCut"));

   // Kinematics of final selection
   locReaction->Add_AnalysisAction(new DHistogramAction_ParticleComboKinematics(locReaction, false)); //false: fill histograms with measured particle data

   _data.push_back(locReaction); //Register the DReaction with the factory

   return NOERROR;
}

//------------------
// fini
//------------------
jerror_t DReaction_factory_p2pi_hists::fini(void)
{
   for(size_t loc_i = 0; loc_i < dReactionStepPool.size(); ++loc_i)
      delete dReactionStepPool[loc_i]; //cleanup memory
   return NOERROR;
}