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Current Status of StHbtMaker

Current Status of StHbtMaker. status/progress HBT m DST structure example work discussion. Maker chain. StEventMaker. StHbtEventReader. StHbtManager. StHbtMaker. StHbtAnalysisCollection. Event Cut. StHbtAnalysis. Event- Mixing Buffer. Particle 1 Cut. Particle 2 Cut. Pair Cut.

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Current Status of StHbtMaker

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  1. Current Status of StHbtMaker status/progress HBT mDST structure example work discussion malisa - STAR HBT PWG meeting - 01Aug99

  2. . . . Maker chain StEventMaker StHbtEventReader StHbtManager StHbtMaker StHbtAnalysisCollection . . . Event Cut ... StHbtAnalysis Event- Mixing Buffer Particle 1 Cut Particle 2 Cut Pair Cut StHbtCorrFctnCollection CorrFctn CorrFctn ... http://duvall.star.bnl.gov/STARAFS/comp/pkg/dev/StRoot/StHbtMaker/doc/ software status • StHbtMaker works in dev on solaris and linux no “setenv MakeDll…” • documentation on web • example in doc/ and in StRoot/macros/examples cvs and $STAR area • several recent CorrFctns and cuts • enhanced functionality recently added... malisa - STAR HBT PWG meeting - 01Aug99

  3. StHbtPair - Selemon Bekele double qInv() const; double kT() const; double mInv() const; double qSidePf() const; double qOutPf() const; double qLongPf() const; double qSideCMS() const; double qOutCMS() const; double qLongCMS() const; double qSideBf(double beta=0.0) const; double qOutBf(double beta=0.0) const; double qLongBf(double beta=0.0) const; Recent functionality enhancement • Reader/StMcEventReader - Frank Laue • Reads StMcEvent object (instead of StEvent object) • builds HBT transient mDST Coulomb Corrections - Randy Wells Transient HBT mDST- Dave Hardtke…. malisa - STAR HBT PWG meeting - 01Aug99

  4. StHbtTrack StHbtEvent StHbtV0Track transient HBT mDST Current StHbtEvent(Dave Hardtke) ... ... unsigned short mEventNumber; unsigned short mCtbMultiplicity; // Central Trigger Barrel unsigned short mZdcAdc[2]; // ZDC values east/west int mTpcNhits; unsigned short mNumberOfTracks; unsigned short mNumberOfGoodTracks; float mReactionPlane[2]; // reaction plane/error StHbtThreeVector mPrimVertPos; StHbtTrackCollection* mTrackCollection; StHbtV0TrackCollection* mV0TrackCollection; //*** good enough? malisa - STAR HBT PWG meeting - 01Aug99

  5. StHbtTrack StHbtEvent StHbtV0Track Current StHbtTrack (Dave Hardtke) ... ... char mCharge; int mNHits; unsigned short mNHitsPoss; float mNSigmaPion; float mNSigmaKaon; float mNSigmaProton; float mdEdx; float mDCAxy; float mDCAz; float mChiSqXY; float mChiSqZ; StHbtThreeVector mP; float mPt; StPhysicalHelixD mHelix; Note: pointer saves space in real data Also need: StHbtLorentzVector* mFreezeOut; malisa - STAR HBT PWG meeting - 01Aug99

  6. StHbtTrack StHbtEvent StHbtV0Track Current StHbtV0Track (Dave Hardtke) ... ... float mNSigmaLambda; float mNSigmaLambdaBar; float mNSigmaK0; float mNSigmaGamma; float mDCA; float mImpactParameter; StHbtThreeVector mP; StHbtThreeVector mV; ?? Clearly need guidance from Strangeness group Also need: StHbtLorentzVector* mFreezeOut; malisa - STAR HBT PWG meeting - 01Aug99

  7. f reconstructionUsing MC data- Frank Laue malisa - STAR HBT PWG meeting - 01Aug99

  8. Parity violationanalysis reals ~50 DST data events N.B. this type of analysis stretches StHbt a bit far. Not really HBT analysis, as a number is calculated for each event. Requires interaction between EventCut and CorrFctn mixed malisa - STAR HBT PWG meeting - 01Aug99

  9. pp Qinv HBT & starting 2-track cut studies... ~50 DST data events (hijing) track-splitting? malisa - STAR HBT PWG meeting - 01Aug99

  10. Track-splitting effects gone when reading from McEvent malisa - STAR HBT PWG meeting - 01Aug99

  11. Issues/to do • creation of HBT persistent mDSTs • need StHbtEventWriters • versioning? • “finalization” of HBT transient mDST content • More analysis of Lanny’s files • Model-weighted pairs based on freeze-out position • Nantes • requires FreezeOut point • 2-track cuts… time to start getting serious • Do we want bi-weekly phone meetings? • start discussing physics as well as software • break cycle of no communication no PWG progress malisa - STAR HBT PWG meeting - 01Aug99

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