1. 14/06/2010 Stefano Spataro Status of LHE Tracking and Particle Identification Status of LHE Tracking and Particle Identification Stefano Spataro III Panda Collaboration Meeting Stockholm, June 14 - 18, 2010 Monday, 14 th June, 2010

2. 14/06/2010 Stefano Spataro Status of LHE Tracking and Particle Identification Overview  Characterization of barrel Global Tracking  Performances MVD + TPC + GEM  Performances MVD + STT + GEM  Muon Tracking  News in Particle Identification

3. 14/06/2010 Stefano Spataro Status of LHE Tracking and Particle Identification Global Tracking Software MVD: Bonn, Torino, Julich p STT: Pavia, Julich TPC: Munich GEM: GSI

4. 14/06/2010 Stefano Spataro Status of LHE Tracking and Particle Identification Helix fit Kalman Filter (genfit - Munich) Track Follower (GEANE – Pavia) use of the same geometry for simulation and track following helix assumption LHE Global Tracking (central tracker) DPM @ 3.6 GeV/c 10 events conformal mapping field map from TOSCA

5. 14/06/2010 Stefano Spataro Status of LHE Tracking and Particle Identification Global Tracking MVD + TPC + GEM Pattern Recognition Efficiency w/o 90° holes 90° holes

6. 14/06/2010 Stefano Spataro Status of LHE Tracking and Particle Identification P > 1.5 GeV/c Global Tracking MVD + TPC + GEM Resolution Pattern Recognition PatRec + Kalman MVD+TPC+GEM MVD+TPC MVD+GEM

7. 14/06/2010 Stefano Spataro Status of LHE Tracking and Particle Identification New MVD Geometry MVD + TPC + GEM Mvd-2.1_FullVersion Mvd-2.1_Sensitive L.Zotti resolution x2 due to passive materials full geometry description is very important

8. 14/06/2010 Stefano Spataro Status of LHE Tracking and Particle Identification Global Tracking with STT three iterations pattern recognition 1° Stand-alone STT (G.Boca) 2° Conversion Straw  3D points X Y Z  Stt Helix Hit Mvd Strip Mvd Pixel 3° MVD + STT + GEM conformal mapping

9. 14/06/2010 Stefano Spataro Status of LHE Tracking and Particle Identification Global Tracking MVD + STT + GEM Pattern Recognition Efficiency w/o 90° holes 90° holes

10. 14/06/2010 Stefano Spataro Status of LHE Tracking and Particle Identification P > 1.5 GeV/c Global Tracking MVD + STT+ GEM Resolution Pattern Recognition PatRec + Kalman only parallel tubes MVD+STT a one-iteration pattern recognition needed (G.Boca)

11. 14/06/2010 Stefano Spataro Status of LHE Tracking and Particle Identification Global Tracking Open Issues Multi-Hypothesis Particle Fit MVD + STT + GEM  One-Iteration Pattern Recognition kaons @ 1 GeV/ckaons @ 500 MeV/c

12. 14/06/2010 Stefano Spataro Status of LHE Tracking and Particle Identification Muon Tracking (MDT) muon physics missing only Drell-Yan TORINO-JINR (Giessen)

13. 14/06/2010 Stefano Spataro Status of LHE Tracking and Particle Identification Muon Tracking in MDT  Stand-alone pattern recognition  Correlation to charged tracks  Evaluation of: Number of fired layers Amount of crossed iron muon fitting  2 (under testing)  - correlation efficiency

14. 14/06/2010 Stefano Spataro Status of LHE Tracking and Particle Identification Muon Tracking in MDT  @ 1 GeV/c  @ 2 GeV/c stopped crossing  energy loss

15. 14/06/2010 Stefano Spataro Status of LHE Tracking and Particle Identification Calculation of Momentum at layer 0 – Energy loss (GEANE) muons pions BARREL BARREL+ECEC+MF BARREL BARREL+ECEC+MF

16. 14/06/2010 Stefano Spataro Status of LHE Tracking and Particle Identification Particle Identification MVD, TPC/STT, Cherenkov, EMC, MDT… different detectors for PID covering different momentum/angle ranges  handling of different PID signals  combining several PID info MDT EMC DIRCDIRC DISCDISC two approaches under study  Bayesian method  Multivariate analysis TMVA Neural network Genetic algorythm …

17. 14/06/2010 Stefano Spataro Status of LHE Tracking and Particle Identification PID: Bayesian Method Global Likelihood particle flux probability algorithms k e   p BARREL DIRC P>20% k e   p DISC DIRC BRAND NEW

18. 14/06/2010 Stefano Spataro Status of LHE Tracking and Particle Identification MDT: Hard Cuts P(  )=1 P(  )=0 K e   p MVD: dE/dx P>20% update needed for MVD 2.1 e p // EMC: E/p Momentum [GeV/c] EMC ELoss / Momentum [c] EMC Hard Cuts (not yet in svn) Multi Variate Analysis (M.Babai) BRAND NEW huge parameter file BRAND NEW

19. 14/06/2010 Stefano Spataro Status of LHE Tracking and Particle Identification X(3872)  J/   +  - J/    +  - J/   e + e -  missing mass ALL EMC HC MC MC J/    +  - MC J/   e + e - MDT Corr MC  missing mass EMC HC MC ep missing mass STT

20. 14/06/2010 Stefano Spataro Status of LHE Tracking and Particle Identification Open Issues  TPC digitization slow – Bug? Optimization?  TPC dE/dx completely missing  Bayesian STT dE/dx – Any volunteers?  EMC Bayesian PID – Any volunteers?  TOF w/o START pid?  Proper interface to analysis

21. 14/06/2010 Stefano Spataro Status of LHE Tracking and Particle Identification Summary  Tracking and PID almost complete for BARREL  LHE tracking characterized for both STT and TPC  Particle Identification with MVD DIRC DISC MDT  The system is ready (since a while) to perform analysis