DReaction_factory_dirc_tree.cc

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// $Id$
//
//    File: DReaction_factory_dirc_tree.cc
//

#include "DReaction_factory_dirc_tree.h"

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

//------------------
// init
//------------------
jerror_t DReaction_factory_dirc_tree::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_tree"); //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("dtree_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

   // Kinematic Fit Results
   locReaction->Add_AnalysisAction(new DCutAction_KinFitFOM(locReaction, 5.73303E-7)); // confidence level cut //+/- 5 sigma
   // locReaction->Add_AnalysisAction(new DCutAction_InvariantMass(locReaction, Unknown, false, 0.77-0.15, 0.77+0.15));
   // locReaction->Add_AnalysisAction(new DCutAction_MissingMassSquared(locReaction, false, -0.02, 0.02));
   
   // MASSES, POST-KINFIT
   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, "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_tree(locReaction, true, PiPlus, 0, "PiPlus_DIRC_KinFit"));

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

   
   /**************************************************** p2pi_dirc Reaction Steps ****************************************************/

   locReaction = new DReaction("p2k_dirc_tree"); //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("dtree_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
   
   // Kinematic Fit Results
   locReaction->Add_AnalysisAction(new DCutAction_KinFitFOM(locReaction, 5.73303E-7)); // confidence level cut //+/- 5 sigma  
   // locReaction->Add_AnalysisAction(new DCutAction_InvariantMass(locReaction, Unknown, false, 0.95, 1.05));
   // locReaction->Add_AnalysisAction(new DCutAction_MissingMassSquared(locReaction, false, -0.02, 0.02));
      

   // MASSES, POST-KINFIT
   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, "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_tree(locReaction, true, KPlus, 0, "KPlus_DIRC_KinFit"));

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

   return NOERROR;
}

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