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Status of Particle ID in TRD reconstruction
Prashant Shukla
Institute of Physics
University of Heidelberg
Presentation at TRD Software Meet 21st April, GSI Darmstadt
1. TRD PID with the Aliroot (v4-02-09) was giving Bad PID.
2. In January last week many inconsistencies were corrected. Bogdan put new filter for Tail Cancellation. Drift velocity was made 1.62 (earlier 1.50). No. of Time Bins was made 18. It was giving Good PID.
3. Around same time Marian also made the changes in the tracking which modified the gain factor. All these changes were put together as v4-02-Release. Bad PID.
4. I generated the response functions again and submitted (March 11). This gives good PID.
5. There are newer changes submitted by Christoph for new treatment of drift velocity. Bad PID.
Recent evolution of AliRoot and TRD PID
Test Beam Data pion eff. At 90% electron eff. (4, 6 GeV)
Momentum Eff. (LQ) Eff.(LQX)
1 GeV 0.014 0.0004 GeV 0.019 0.0146 GeV 0.029 0.0228 GeV 0.051 0.04010 GeV 0.045 0.036