1. MuID Software Status/Future Plan Yajun Mao (RIKEN/CIAE) PHENIX Muon Collaboration Meeting, BNL, Dec. 16, 2000

2. MuID Reconstruction Overview     Cluster Finder Road Finder I Muon Identification Raw Data DST Road Finder II Yajun Mao, RIKEN/CIAE PHENIX Muon Collaboration Meeting, BNL, Dec. 16, 2000 Tracker Software

3. Status of Phase I Road Finder Yajun Mao, RIKEN/CIAE PHENIX Muon Collaboration Meeting, BNL, Dec. 16, 2000 Parameterized cluster size Multiple seed gaps Changeable search orders Steered search window Accept closest cluster within the window Weighted line fit when projection High muon reconstruction efficiency achieved Basically done, more work are need to optimiz parameters

4. Status of Phase II Road Finder Yajun Mao, RIKEN/CIAE PHENIX Muon Collaboration Meeting, BNL, Dec. 16, 2000 Check track identity to remove ghost roads Re-find by accept all clusters within search window (with ghost hit check) Calculate road-track match quality Calculate discriminant variables Basically done, evaluation work are need for refinement

5. Status of Muon Identification Yajun Mao, RIKEN/CIAE PHENIX Muon Collaboration Meeting, BNL, Dec. 16, 2000 Currently 2D lookup table is used which is based on momentum-depth study on muons and pions Extended lookup table is undergoing Discriminant function analysis is undergoing

6. Status of Geometry & Database Yajun Mao, RIKEN/CIAE PHENIX Muon Collaboration Meeting, BNL, Dec. 16, 2000 Fixed geometry version swapped problem Fixed database/text file access problem Used time stamp to access different version Put reconstruction control parameters to database facility to read database and convert to hex file

7. Status of Event Display Yajun Mao, RIKEN/CIAE PHENIX Muon Collaboration Meeting, BNL, Dec. 16, 2000 Use the same framework as in central arm Display entire cluster rather than centroid Show associated clusters for a given road Display GEANT tracks (not finished yet) The event display works fine, some good features in UT event display will be immigrated and accessible an extra small window.

8. Yajun Mao, RIKEN/CIAE PHENIX Muon Collaboration Meeting, BNL, Dec. 16, 2000

9. Muon ID Software Evaluation Yajun Mao, RIKEN/CIAE PHENIX Muon Collaboration Meeting, BNL, Dec. 16, 2000 Compare GEANT track with reconstructed road in Muon ID ( include comparison between Ghit position and road plane intersection, ratio of matched hits to hits in GTrack and in road ) Deff. between reconstructed track and road at MuTR station 3 ( displacement and direction difference ) Muon efficiency for road finder I/II Ghost/event for road finder I/II Pion rejection rate for road finder I/II

10. Yajun Mao, RIKEN/CIAE PHENIX Muon Collaboration Meeting, BNL, Dec. 16, 2000

13. The Result of Evaluation Yajun Mao, RIKEN/CIAE PHENIX Muon Collaboration Meeting, BNL, Dec. 16, 2000 # of selected found by matched identified apply Muon event tracks finder 1 with tracker as muon finder2 2GeV 5000 3730 3269 973 967 967 3GeV 5000 4771 4686 3153 3066 3064 4GeV 5000 4863 4843 3598 3514 3507 5GeV 5000 4913 4902 3749 3648 3637 10GeV 5000 4989 4981 3981 3894 3880 20GeV 5000 4998 4992 4062 3978 3939 Pion 2GeV 10000 11 9 3 2 2 3GeV 10000 48 43 23 21 21 4GeV 10000 67 55 35 23 22 5GeV 10000 104 85 50 37 32 10GeV 10000 180 133 84 35 21 20GeV 10000 778 556 338 168 67 Au+Au MB 750 825 391 234 177 139

14. Future Plan for Reconstruction Yajun Mao, RIKEN/CIAE PHENIX Muon Collaboration Meeting, BNL, Dec. 16, 2000 Revise Evaluation Software Tune Parameters for Reconstruction Develop Muon Identification Software Use Packet ID rather than Module ID to extract arm and orientation from DCM Study Road/Track match for ghost drop Use pMonitor Use pDST

15. Future Plan for Event Display Yajun Mao, RIKEN/CIAE PHENIX Muon Collaboration Meeting, BNL, Dec. 16, 2000 Add more diverse event selection capability. Display GEANT hits and tracks. Add multiple simultaneous fixed views. Allow the same object to be displayed differently in different view Indicated depth of tubes (with color?) Have variable prominence for geometry outlines. Saveable preferences for colors, views... DST as input