DReaction_factory_dirc_reactions.cc

Go to the documentation of this file.

// $Id$
//
//    File: DReaction_factory_dirc_reactions.cc
//

#include "DReaction_factory_dirc_reactions.h"

//------------------
// brun
//------------------
jerror_t DReaction_factory_dirc_reactions::brun(JEventLoop* locEventLoop, int32_t locRunNumber)
{
   return NOERROR;
}

//------------------
// init
//------------------
jerror_t DReaction_factory_dirc_reactions::evnt(JEventLoop* locEventLoop, uint64_t locEventNumber)
{
   // Make as many DReaction objects as desired
   DReactionStep* locReactionStep = NULL;

   // 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_dirc Reaction Steps ****************************************************/

   DReaction* locReaction = new DReaction("p2pi_dirc"); //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_dirc Control Settings ****************************************************/

   // 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);

   locReaction->Enable_TTreeOutput("tree_p2pi_dirc.root");

   /**************************************************** p2pi_dirc 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
   deque<Particle_t> locRhoPIDs;  locRhoPIDs.push_back(PiPlus);  locRhoPIDs.push_back(PiMinus);
   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"));

   // Custom histograms for DIRC
   //locReaction->Add_AnalysisAction(new DCustomAction_dirc_reactions(locReaction, false, PiPlus, 0, 1, "PiPlus_DIRC"));
   locReaction->Add_AnalysisAction(new DCustomAction_dirc_reactions(locReaction, true, PiPlus, 0, 1, "PiPlus_DIRC_KinFit"));
   //locReaction->Add_AnalysisAction(new DCustomAction_dirc_reactions(locReaction, false, PiMinus, 0, 2, "PiMinus_DIRC"));
   locReaction->Add_AnalysisAction(new DCustomAction_dirc_reactions(locReaction, true, PiMinus, 0, 2, "PiMinus_DIRC_KinFit"));

   // 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_dirc Reaction Steps ****************************************************/

   locReaction = new DReaction("p2k_dirc"); //needs to be a unique name for each DReaction object, CANNOT (!) be "Thrown"

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

   /**************************************************** p2pi_dirc Control Settings ****************************************************/

   // 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);

   locReaction->Enable_TTreeOutput("tree_p2k_dirc.root");

   /**************************************************** p2pi_dirc 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
   deque<Particle_t> locPhiPIDs;  locPhiPIDs.push_back(KPlus);  locPhiPIDs.push_back(KMinus);
   locReaction->Add_AnalysisAction(new DHistogramAction_MissingMassSquared(locReaction, false, 1000, -0.1, 0.1));
   locReaction->Add_AnalysisAction(new DHistogramAction_InvariantMass(locReaction, 0, locPhiPIDs, false, 500, 0.9, 1.4, "Phi"));
   locReaction->Add_AnalysisAction(new DHistogramAction_InvariantMass(locReaction, 0, locPhiPIDs, true, 500, 0.9, 1.4, "Phi_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, locPhiPIDs, false, 500, 0.9, 1.4, "Phi_PostKinFitCut"));
   locReaction->Add_AnalysisAction(new DHistogramAction_InvariantMass(locReaction, 0, locPhiPIDs, true, 500, 0.9, 1.4, "Phi_KinFit_PostKinFitCut"));

   // Custom histograms for DIRC
   //locReaction->Add_AnalysisAction(new DCustomAction_dirc_reactions(locReaction, false, KPlus, 0, 1, "KPlus_DIRC"));
   locReaction->Add_AnalysisAction(new DCustomAction_dirc_reactions(locReaction, true, KPlus, 0, 1, "KPlus_DIRC_KinFit"));
   //locReaction->Add_AnalysisAction(new DCustomAction_dirc_reactions(locReaction, false, KMinus, 0, 2, "KMinus_DIRC"));
   locReaction->Add_AnalysisAction(new DCustomAction_dirc_reactions(locReaction, true, KMinus, 0, 2, "KMinus_DIRC_KinFit"));

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