PID Day 2 Notes

For the charged particle identification portion of the workshop we classified work in three broad categories on the whiteboard.

We need to understand the response and functionality of the various PID devices. The first two we hope to have finished by the July workshop.

BCAL TOF (Christina/Blake)
- This is an overlap from day one. Preliminary results from Christina with cosmics from beam test indicate a timing resolution around 500 ps. We need to understand if these results are consistent with other test results and present an accurate picture of the expected time resolution.
Cherenkov backgrounds (Matt/Richard)
- We need to use full detector MC to estimate the background rates in the Cherenkov detector to better understand its efficiency.
CDC dE/dx (CMU)
- Tests with prototype chambers are needed validate the dE/dx capability of the CDC
Forward TOF
- We need to understand to what extent particle discrimination ability is driven by the timing resolution of the TOF wall. This item overlaps with combining PID output from full detector MC.

Physics Backgrounds: Elke, Eugene, and Alex will use pythia to try to understand the multiplicity and momentum/angular distribution of various hadron species in generic photoproduction. With this we can:
- compare to what we expect from key physics channels to understand background rejection needed
- validate dE/dx as a choice for identification of curling particles in the CDC