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Status of the PPR chapter 5 : Central tracking

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  1. Status of the PPR chapter 5 : Central tracking Marian Ivanov

  2. TPC tracking (1) • Structure: • Stochastic processes in TPC • 3 pages 1-4 • Accuracy of local coordinate measurement • 4 pages -4-8 • Center-of-gravity error parametrization • 2 pages – 8-9 • Precision of cluster COG determination using measured amplitude • 1 page 10 • Estimation of the precision of cluster position determination using measured cluster shape • 1.5 page 11-12

  3. TPC tracking (2) • Structure: • TPC Cluster finder • +Subsections: • Cluster unfolding • Cluster characteristic • 3 pages -12-15 • TPC tracking • Subsections: • Track parameterization • Seed finding algorithms, strategy • Parallel kalman tracking • Dedx measurement • 8 pages – 15-23

  4. TPC tracking (3) • Status: • Performance: • Not yet written • Part of the combined tracking performance? • Other mentioned parts • Written • On afs • Under discussion

  5. TPC PID • Structure • dEdx measurement • Truncated mean + • Shared clusters removal • Correction for extended cluster shape • dEdx error parameterization • Function of number measured points, number of shared clusters and dEdx value estimate • Status: • Not yet written • Expected – ~ 4 pages

  6. TRD tracking (1) • Structure: • TRD. General Description and Working Principle. • 2.5 pages -1-2.5 • Stochastic processes in TRD detector and detector Simulations • Subsections: • Transition radiation absorption • Electron drift path. ExB effect. • Pad response function. • 8 pages – 2.5-11 • Accuracy of local coordinate measurement. • Tail cancellation, symmetrization • Cluster reconstruction • Non-Linearities, systematic effects • 8 pages – 11-19

  7. TRD tracking (2) • Structure: • Position and angular resolution. • Subsection • Dependence on S/N • Dependence on Incident Angle • Both subsection: Comparison of simulation and test beam data. • 5 pages, 19-23

  8. TRD tracking (3) • Structure: • Off-line reconstruction • Clustering method • Occupancy and Cluster unfolding • 2 pages, 24-25 • Tracking • Tracklet finding. • Tracklet error parameterization – serial correlation • Kalman filtering

  9. TRD tracking (4) • Status: • Performance: • Not yet written • Templates for picture exist • Part of the combined tracking performance? • Other mentioned parts • Written • On afs • Under discussion

  10. ITS tracking (1) • Structure: • Off-line reconstruction • Clustering method • Cluster unfolding • Cluster error parameterization • Tracking • Parallel tracking • Missing part - to be developed • Extension of ITS tracking in pseudorapidity up to ~2 • Status: • Based on CHEP 2004 article • 3 pages – extended to 5-6

  11. ITS tracking + V0 finder • Structure: • ITS integrated V0 finder algorithm • Primary DCA error parameterization • DCA error parameterization • Point angle error parameterization • Causality likelihood • Combined likelihood • Primary DCA + DCA + PA +Causality • Signal over background as function of cut on combined likelihood • Invariant mass and momenta resolution as function of momenta • Lambda, K0s and gamma conversion • Efficiency as function of likelihood cut • Status: • Written - ~ 9 pages

  12. TOF matching (1) • Structure: • As additional part to TOF • Position resolution of TRD prolongation in TOF (described by covariance matrix) • Space likelihood - integral of probability distribution of TOF pad • Non gaussian probability distribution • Causality likelihood • Time likelihood – as additional information in case of “doubtfull” space likelihood • Combined likelihood – minimax approach • Status: • Not yet written – Delayed by the new development of TRD simulation • ~ 5 pages expected

  13. Combined tracking (1) • Structure: • Off-line reconstruction • Tracking schema • Kink reconstruction • Status: • Not yet written • Based on CHEP 2004 article • 3 pages – extended to 5-6

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