BESIII Analysis Software and Event Data Model Kanglin He 23 Feb, 2006

Outline  BESIII Analysis Software  Analysis Tools -- K.L He  Analysis Framework -- X.B Ji  Event/Physics Tag -- X.H Mo  BESIII Event Data Model  MC Truth Event Data Model -- W.D Li  Rec/Dst Event Data Model -- S.P Wen  Analysis Event Data Model -- K.L He  Physics Event Data Model -- Physics Group  Statistic Analysis Software -- Y.S Zhu  Statistical Significance  Toy Monte Carlo  PWA and Dalitz Analysis -- H.B Li

Analysis Software  Tools Project (K.L. He)  Particle ID  Composition Tools  BParticle Project (X. B. Ji)  Charged, Neutral Track Selection  Ks, Λ, π 0 /η Reconstruction  Event/Physics Tag Project (X. H. Mo)  Event Classification  Luminosity Determination  Event Collection, filter  Physics Performance Check (X. B. Ji)

Particle ID  DedxPID: dE/dx info  Ready now, correction was made  Tof1PID: inner barrel TOF  Ready now, correction was made  Tof2PID: outer barrel TOF  Ready now, correction was made  TofEPID: Endcap TOF  Not readdy now, due to reconstruction  TofQPID: Q of Barrel TOF  Not ready now, need detail study on Calibration  EmcPID: energy deposit in EMC  Not ready now, Wang Liangliang is working at  ParticleID  Combine the above info  MuonID  Develop by PKU  ParticleIDBase  For developer only

ParticleIDBase class (I) common interface public: virtual bool IsPidInfoValid() = 0; virtual double chi(int n) const = 0; virtual double prob(int n) const = 0; virtual int ndof() const = 0; DstTrkList* PidTrk() const {return m_trk;} protected: // PID calculation routines(include PID correction) virtual int particleIDCalculation() = 0;

Sub-PidSys class design class Tof1PID : public ParticleIDBase { public: // constructor & desconstructor Tof1PID(DstTrkList *dstTrk, double chi=4); ~Tof1PID(){;} bool IsPidInfoValid() {return (m_ndof > 0); } double chi(int n) const {return m_chi[n];} double prob(int n) const {return m_prob[n];} int ndof() const {return m_ndof;} protected: int particleIDCalculation(); double offsetTof1(int n, int cntr, double ptrk, double ztof, double ph); double sigmaTof1(int n, int cntr, double ptrk, double ztof, double ph); private: xxxxx; }

How to use ParticleID // Be careful to avoid memory leakage ParticleID *pid = 0; for (int i = 0; i < ncharg; i++) { DstTrkList *dstTrk = *(dstTrkListCol->begin() + i); if(pid) delete pid; pid = new ParticleID(dstTrk); pid->usePidSys(pid->useDedx() | pid->useTof1() | pid->useTof2() )|; // pid->usePidSys(pid->useDedx()); // pid->usePidSys(pid->useTof1()); // pid->usePidSys(pid->useTof2()); pid->identify(pid->onlyPion() | pid->onlyKaon()); // pid->identify(pid->onlyPion()); // pid->identify(pid->onlyKaon()); pid->calculate(); if(!(pid->IsPidInfoValid())) continue; // user's selections } if(pid) delete pid;

Composition Tools  Telesis  BESII Kinematic Fit package  C++ implemented by SDU  BKlamsVTX  BESII Ks, Λ reconstruction package  C++ implemented by Dr. B.J. Liu  VertexFit  New stuff, by K. L He  VertexFit  SecondVertexFit  KinematicFit

Status of Telesis  Track presentation  (φ,κ,λ) for charged track  (φ,λ, E) for neutral track  Constraints  Resonance  Momentum-energy conservation  Miss track  Worked smoothly in BOSS

TKinematicFit #include "Telesis/TKinematicFit.h" TKinematicFit* kmfit = TKinematicFit::instance(); DstMdcTrack *pipTrk=xxx; DstMdcTrack *pimTrk = xxx; DstEmcTrack *g1Trk = xxx; DstEmcTrack *g2Trk = xxx; kmfit->init(ecms); kmfit->AddTrack(1, pipTrk, mpi, 0); kmfit->AddTrack(2, pimTrk, mpi, 0); kmfit->AddTrack(3, g1Trk, 0.0, 0); kmfit->AddTrack(4, g2Trk, 0.0, 0); kmfit->AddResonance(1, 0.135, 3, 4); If(kmfit->fit()) { HepLorentzVector ppip = kmfit->pfit(1); HepLorentzVector ppim = kmfit->pfit(2); HepLorentzVector ppi0 = kmfit->pfit(3) + kmfit->pfit(4); // user code, fill histogram/ntuple } // see Analysis/Physics/RhopiAlg/RhopiAlg for detail

Status of BKlamsVTX  Get the point (s) of intersection of two helices in transverse plane  Check if the 2nd vertex candidate is located in reasonable region  Worked smoothly in BOSS Analysis/Physics/KlamsTestAlg for detail

Status of Vertex Fit  Formulas (adopt from Paul Avery’s Lessons)  Include: VertexFit, KinematicFit and 3-D SecondVertexFit  Support Composed Particle  Reconstructed π 0, η  Reconstructed Ks, Λ  Particle and Vertex presentation

Formulas for Kinematic Fitting

Formulas for Kinematic Fitting (continue)

Formulas for Vertex Fitting

Vertex Constraints  Vertex constraint to a fixed position  Vertex constraint to an unknown position  General Vertex fit  Swimming Track parameters and Error matrix to vertex position

Swimming after VertexFit

SecondVertexFit  Find decay vertex position of Ks /Λ through VertexFit  Performing a 2-C fit by applying the alignment constraints  Calculating the decay length and its error Xp: production position (beam position) Xd: decay position

SecondVertexFit

Build Virtual Particle  Virtual Particle from KinematicFit  π 0 /η,…  Virtual Particle from VertexFit  Ks/Λ, …  Can be treated as a normal particle in further kinematic/Vertex fit  BuildVirtualParticle(number) in KinematicFit / VertexFit

AddTrack Utility // event data model dependent void AddTrack(const int number, const double mass, const DstMdcTrack *trk); void AddTrack(const int number, const double mass, const DstMdcKalTrack *trk); void AddTrack(const int number, const double mass, const DstEmcTrack *trk); // event data model independent void AddTrack(const int number, const WTrackParameter wtrk);

Kinematic Constraints  Invariant mass constraints  AddResonance(number, mass, n1, n2,...)  Total energy constraints  AddTotalEnergy(number, energy, n1, n2, …)  Total Momentum constraints  AddTotalMomentum(number, ptot, n1, n2, …)  Total 3-momentum constraints  AddThreeMomentum(number, Hep3Vector p3, n1, n2, …)  Total 4-momentum constraints  AddFourMomentum(number, HepLorentzVector p4, n1, n2, …)  AddFourMomentum(number, etot, n1, n2, …)  Equal mass constraints  AddEqualMass(kmfit  AddList(n1, n2, …), kmfit  AddList(m1, m2, ….))

How to use compose tools TKinematicFit *kmfit=TKinematicFit::instance(); VertexFit *vtxfit=VertexFit::instance(); SecondVertexFit *vtxfit = SecondVertexFit::instance(); KinematicFit *kmfit=KinematicFit::instance(); kmfit->init(); // Track and constraints if(kmfit->Fit()) {//extract kinematic fit information;} vtxfit->init(); // Track and constraints if(vtxfit->Fit()) {// extract (Second)VertexFit information;}

Summary of Analysis Tools  Particle ID package  Hadron identification by combined TOF and dE/dx information  Muon identification by MuonID  Electron identification is not completed  All Composition Tools packaged are worked smoothly and stably in BOSS

Analysis Event Data Flow

B(es)Particle Project  Write Particle (Charged tracks, neutrals, Vertice and composed particle) information into TDS. Analysis Algorithm can access these info.  May develop to a common standard platform, make Analysis job easily and friendly  Allow Physics groups to design Physics Data model easily

Contents  BParticle Collection  Event Analysis Event Data Model  BParticleID Collection  Particle identification data  BTrack Collection  Charged and Neutral Track infomation data  BVertex Collection  (2nd)Vertex Reconstruction data  BStableParticle Collection  Photon, Electron, Muon, Pion, Kaon, Proton  BComposedParticle Collection  π 0,η,Ks,Λ etc

B(es)Particle Project

Event/Physics Tags Project  Event Classification  Bhabha/Dimu/Hadron/etc.  Luminosity Determination  Bhabha/Dimu/Di-photon  Physics Tags  Charm Meson Tags (D 0, D +, Ds)  J.Y Zhang, Y.Z Sun, S.S Sun, M. Yang are working on  J/Ψ tags (Ψ’  ππJ/Ψ)  X.H Mo, Li Gang are working on  Other Physics Tags  Event Collection/Filter (Y.Z Sun and Framework Team)  Event Collection  Filter: sub-sets of data containing selected tags

Statistic Analysis  Statistic Significance  Up Limit determination  Systematic Uncertainties Theory  Toy Monte Carlo

Event Data Model  MC Truth information  Monte Carlo Generator & Simulation  Dst Event Data Model  Reconstruction  Truth Match  MC track  Rec/Dst track  Analysis Event Data Model  BParticle project  Physics Event Data Model  Defined by Physics/Working Group  Histograms, ntuples  Root, paw……

MC Truth Data Model  Generator  McParticle  So on  Kinematic and vertex info  Simulation  MdcMcHit  TofMcHit  EmcMcHit  MucMcHit Please see Event/McTruth/ subdirectory For detail

Dst Event Data Model  DstMdcTrack  DstMdcKalTrack  DstDedx  DstTofTrack  DstEmcTrack  DstMucTrack  DstExtTrack Please see Event/DstEvent subdirctory For detail

DstMdcTrack  int trackID()  int charge()  Double helix(int i)  Double pxy()  Double px()  Double py()  Double pz()  Double p()  Double theta()  Double phi()  Double x()  Double y()  Double z()  Double r()  Int stat()  Double chi2()  Int ndof()  Double rms()  Double err(int i)  Int nhits()  Int nster()

How to use DstMdcTrack #include “Event/DstMdcTrack.h” MsgStream log(msgSvc(), name()); SmartDataPtr mdcCol(eventSvc(), EventModel::Dst::DstMdcTrackCol); If(!mdcCol) return StatusCode::SUCCESS; DstMdcTrackCol::iterator it = mdcCol  begin(); for( ; it < mdcCol  end() ; it++) { //px, py, pz log<<MSG::INFO<<“px, py, pz = “ <<(*it)  px() <<“, “ // px <<(*it)  py() <<“, “ // py <<(*it)  pz() << endreq; // pz // x, y, z, r log<<MSG::INFO<<“ x0, y0, z0, rxy = “ << (*it)  x() << “, “ // x0 <<(*it)  y() << “, “ // y0 <<(*it)  z() << “, “ // z0 <<(*it)  r() << endreq; // rxy }

Global Link  MDC reconstruction  dE/dx, Kalman fit track  Match to TOF and Muon counter Track  Applying Track Extrapolatio information, done in Reconstruction  Match to EMC  Position difference of extTrk and emc Track, treat as Neutral tracks if not matched See Wang L.L ‘s talk for detail

Dst Track List Collection  trackID()  MdcTrk()  DstMdcTrack  MdcKalTrk()  DstMdcKalTrack  Dedx()  DstDedx  TofTrk()  DstTofTrack  EmcTrk()  DstEmcTrack  MucTrk()  DstMucTrack  ExtTrk()  DstExtTrack Access sub-detector info through a set of pointers

TrackList (track level) int trackID() const {return m_trackID;} bool IsMdcTrkValid() {return (m_originMdcTrack != 0);} bool IsMdcKalTrkValid() {return (m_originMdcKalTrack != 0);} bool IsDedxValid() {return (m_originDedx != 0);} bool IsTofTrkValid() {return (m_originTofTrack != 0);} bool IsEmcTrkValid() {return (m_originEmcTrack != 0);} bool IsMucTrkValid() {return (m_originMucTrack != 0);} bool IsExtTrkValid() {return (m_originExtTrack != 0);} DstMdcTrack* MdcTrk() {return m_originMdcTrack;} DstMdcKalTrack* MdcKalTrk() {return m_originMdcKalTrack;} DstDedx* DedxTrk() {return m_originDedx;} DstTofTrack* TofTrk() {return m_originTofTrack;} DstEmcTrack* EmcTrk() {return m_originEmcTrack;} DstMucTrack* MucTrk() {return m_originMucTrack;} DstExtTrack* ExtTrk() {return m_originExtTrack ;}

How to access Dst Event Data In analysis source code: #include “Event/DstTrkList.h” SmartDataPtr dstCol ( eventSvc(), EventModel::Dst::DstTrackListCol) // To get Energy deposit in Emc DstTrkListCol::iterater itTrk = dstCol  begin() For(; itTrk < dstCol  end(); itTrk++) { if((*itTrk)  IsEmcTrkValid()) { DstEmcTrack *emcTrk = (*itTrk)  EmcTrk(); double energy = emcTrk  energy(); // piece of analysis code, fill histogram/ntuple } In analysis job option file: #include “$DSTEVENTASSEMBLYALGROOT/jobOptions_DstEventAssembly.txt”

MC Truth Track Association  Match MC truth track & Reconstructed Track  Dubna group is working on  MDC track part is ready now EventNavigator Package Documentation in BES3 Software Web Page

Analysis Event Data Model  BParticle Collection  Event Analysis Event Data Model  BParticleID Collection  Particle identification data  BTrack Collection  Charged and Neutral Track infomation data  BVertex Collection  (2nd)Vertex Reconstruction data  BStableParticle Collection  Photon, Electron, Muon, Pion, Kaon, Proton  BComposedParticle Collection  π 0,η,Ks,Λ etc

BParticle Collection // track List ID int m_trackID; // PDG ID int m_particleID; // reference point(0, 0, 0) HepPoint3D m_refpoint; // WTrackparameters(charge, px, py, pz, e, x, y, z) WTrackParameter m_wtrk; SmartRef m_dstTrk; // Dst TrackList SmartRef m_pid; // ParticleID info SmartRef m_vertex; // Vertex info SmartRef m_bcompart; // ComposeParticle SmartRef m_mother; // mother SmartRefVector m_daughters; //decay daughters

BParticleID Collection int m_trackID; // TrackList ID int m_type; // 1: electron 2: muon 3: pi/K/p int m_ndof; double m_chiDedx[5]; double m_chiTof1[5]; double m_chiTof2[5]; double m_chiTofE[5]; double m_chiTofQ[5]; double m_chiEmc[5]; double m_prob[5]; double m_chisq[5];

BVertex Collection int m_vertexID; VertexType m_vertexType; VertexParameter m_vpar; double m_chisq; int m_ndof; WTrackParameter m_wtrk; double m_lxyz; double m_lxyz_err; SmartRefVector m_outgo;

BTrack Collection  bool isNeutral();  bool isCharged();  bool isGoodTrack();  bool isPhoton();  bool isDaughter();  bool isUnknown();  bool isElectron();  bool isMuon();  bool isPion();  bool isKaon();  bool isProton(); Selection Criteria controlled by job option file

BParticle in Analysis #include “BParticle/BParticle.h” #include “BParticle/BParticleID.h” #include “BParticle/BVertex.h” #include “BParticle/StableParticle.h” #include “BParticle/BComposedParticle.h” // get pion Lists SmartDataPtr pionCol(eventSvc(), EventModel::Analysis::BPionCol); // get Kaon Lists SmartDataPtr kaonCol(eventSvc(), EventModel::Analysis::BKaonCol); // get Photon Lists SmartDataPtr photonCol(eventSvc(), EventModel::Analysis::BPhotonCol); //get KShort Lists SmartDataPtr ksCol(eventSvc(),EventModel::Analysis::BKShortCol); //get pi0 Lists SmartDataPtr pi0Col(eventSvc(), EventModel::Analysis::BPi0Col); //DO not forget to add following line in your job option file #include “$PARTICLESELECTIONALGROOT/share/jobOPtions_ParticleSelection.txt”

BParticleTestAlg  Package: Analysis/Physics/BParticleTestAlg  Contents  Inclusive Photon  Inclusive J/Psi  Inclusive phi/omega/K*  Inclusive pi0/eta  Inclusive Ks/Lambda  Job option file  #include “BPARTICLETESTALGROOT”/share/joboptions_BParti cleTestAlg.txt

Physics Event Data Model  BCharmMeson Collection  D0  K pi, K pi pi0, K pi pi pi, …  D+  Ks pi, K pi pi, K pi pi pi0, …  Ds  Phi pi, K*K, K0K, …  BJPsi Collection  J/Psi  mu+ mu-  J/Psi  e+ e-  Psi’  pi pi J/Psi Designed by Physics Group

Histogram and Ntuples  Root data format  HBOOK data format  Both are supported by Gaudi ROOT PAW

Analysis Environment  Versions  Rec/Cal/Anal/MC/DAQ/…  DAQ/Trigger Mode  Cosmic  Collision  Separate Beam run  Event Type  Bhabha/Dimu/diphoton  Calibration event  Physics event  …  Run Status  Good/Bad/Usable  Run Parameters  Beam parameters  Luminosity  Magnetic Field  …  Data Correction Constants  PID (TOF, dE/dx, Emc, Muc)  Momentum correction factor  …

Analysis Demo  Analysis/Physics/RhopiAlg  RhopiAlg TKinematicFit  > KinematicFit  Analysis/Physics/KlamsTestAlg  BKlamsVTX  Analysis/Physics/BParticleTestAlg  Analysis Event Data Model  Analysis/AnalysisDemoAlg Dst Event Data Model  Analysis/Physics/JPsi/KstarKAlg J/Psi Physics  Analysis/Physics/PsiPrime/G2MuMuAlg Psi’ Physics  Analysis/Physics/CharmMeson/ Charm Physics  Analysis/Physics/TauPair/ Tau Physics  Analysis/Physics/RValue/ R Physics  Analysis/Physics/TwoPhoton/ TwoPhoton Physics

Physics Performance Check  Charged Track  Hadron Performance (X.B Ji’s talk)  MuonID Performance (PKU)  Photon( π 0 /η ) performance  M.S Chen’s talk  Decay Vertex Reconstruction  B.J Liu’s talk  J/Ψ,Ψ’, D/Ds Analysis  X.H Mo, X.B Ji, J.Y Zhang ‘s talks

Energy threshold at 40MeV GeV Efficiencies(100%) Photon detection Efficiencies as a function of E 20MeV 30MeV 40MeV 50MeV 60MeV 70MeV

From Li H.B No 4C fit After 4C fit

From Li H B 50 K Inclusive Ψ ” MC data

~3MeV ~1.2MeV 50 K Inclusive Ψ ” MC data

From Y.Z Sun

From J. Y Zhang

From Li Gang

50K inclusive Ψ ’ MC data Inclusive photon Energy

Cheers and Thank you !!! Welcome to Join Analysis Software Team