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KFParticle for vertex finder

KFParticle for vertex finder. Use simulation files : No preferences since it has to find the vertex so I choose : /star/data54/reco/auau200/hijing_382/b0_20/minbias/y2007h/gheisha_on/p08if/rcf9062_*_100evts.MuDst.root

dara-holcomb
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KFParticle for vertex finder

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  1. KFParticle for vertex finder

  2. Use simulation files : • No preferences since it has to find the vertex so I choose : • /star/data54/reco/auau200/hijing_382/b0_20/minbias/y2007h/gheisha_on/p08if/rcf9062_*_100evts.MuDst.root • Each file has 100 events so I had to match for each files the event id to be sure to take the same event • No cut on gRefMult • The vertex position from GEANT is taken from the geant.root file (from the g2t_vertexTablePointer) • ~ 500 events

  3. KFParticle vs GEANT X position Y position Z position (GEANT-KF)= 0.0112656 (GEANT-KF) = 0.012894 (GEANT-KF)= 3.57455

  4. MuDst vs GEANT X position Y position Z position (GEANT-KF)= 0.012351 (GEANT-KF) = 0.0103064 (GEANT-KF)= 3.55978

  5. MuDst vs KFParticle X position Y position Z position

  6. comments • As for the real data, we see a clear correlation between the vertex position found by KFParticle • KFParticle and MuDst show the same resolution • for Z position, the rms is higher (~3.5 cm) because I’ve taken the RMS value from the histo and we see there is still points with large deviations

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