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