Measuring Energy Deposit in the CAL

Note: Three methods are used to measure the energy deposit in the calorimeter:

1. Parametric Correction (can be used for any track).
   • Use the tracks to characterize the shower by:
     • Position, angle
     • Radiation lengths traversed
     • Proximity to gaps
   • Correct "raw" energy.

2. "Likelihood" (limited energy and angular range).
   • Uses the relation between energy deposit in the last layer and in the rest of the shower.

Note: Below ~50 GeV, last-layer energy is proportional to the leaked energy.

3. Profile Fitting (limited angular range).
   • Fit layer-by-layer deposit to shower shape.

Note: Best if shower peak is contained in the calorimeter.

Choose the best answer (based on the expected error for each of the three).