Mattione GlueX Analysis Factories
From GlueXWiki
DReaction Factory
- DReaction.h located in DANA libraries, DReaction.h_factory located in user plugin (along with a factory generator for it).
- Below shows how to set up DReaction for a Y(2175) analysis.
jerror_t DReaction_factory::init(void) { // Make as many DReaction objects as desired DReaction* locReaction = new DReaction(); { //g, p -> Y(2175), (p) DReactionStep locReactionStep; locReactionStep.dInitialParticleID = Gamma; locReactionStep.dTargetParticleID = Proton; locReactionStep.dFinalParticleIDs.push_back(Unknown); //Y(2175) locReactionStep.dFinalParticleIDs.push_back(Proton); locReactionStep.dMissingParticleIndex = 1; //proton missing locReaction->dReactionSteps.push_back(locReactionStep); } { //Y(2175) -> pi+, pi-, phi DReactionStep locReactionStep; locReactionStep.dInitialParticleID = Unknown; //Y(2175) locReactionStep.dTargetParticleID = Unknown; locReactionStep.dFinalParticleIDs.push_back(PiPlus); locReactionStep.dFinalParticleIDs.push_back(PiMinus); locReactionStep.dFinalParticleIDs.push_back(phiMeson); locReactionStep.dMissingParticleIndex = -1; //none missing locReaction->dReactionSteps.push_back(locReactionStep); } { //phi -> K+, K- DReactionStep locReactionStep; locReactionStep.dInitialParticleID = phiMeson; locReactionStep.dTargetParticleID = Unknown; locReactionStep.dFinalParticleIDs.push_back(KPlus); locReactionStep.dFinalParticleIDs.push_back(KMinus); locReactionStep.dMissingParticleIndex = -1; //none missing locReaction->dReactionSteps.push_back(locReactionStep); } _data.push_back(locReaction); }
User Plugin
extern "C" { void InitPlugin(JApplication *app){ InitJANAPlugin(app); app->AddProcessor(new DEventProcessor_Y2175()); app->AddFactoryGenerator(new DFactoryGenerator_DReaction()); } } // "C" jerror_t DEventProcessor_Y2175::evnt(JEventLoop *locEventLoop, int eventnumber) { vector<const DKinFitTrackCombo*> locKinFitTrackCombo; locEventLoop->Get(locKinFitTrackCombo); //DO HISTS/CUTS/TUPLES HERE return NOERROR; }