CDF COT - dE/dx Analysis

Updates:

• 01/31/02 - theory to explain the difference between pi and e (Eiko)
• Raw width vs drift distance from conversion electrons -
  My original theory was that in the center of the cell (drift distance greater than 2mm, less than 8mm), width will not depend on the cell size. But from the plot, we can see that SL2 still has larger width than the other superlayers, while SL1 has the smallest. Also the dip in the middle seems to have the same amount of effect for all the superlayers.
• Width vs drift distance from simulated proton tracks -
  The dip and the over all width dependence on drift distance is much less than the data. Also there's a hill instead of a valley in the central region. The small dip doesn't occur until drift distance is less than 1mm.