Quick Look at Segmentation
Is the calorimeter too close to the IP to allow particles to separate?
Take a look at two particles (e,p) with varying opening angles
- 5 GeV e + p at q=900
- step Dj by 20
-
Look at fraction of pion energy in towers hit by electron
Overlap fractions:
- 00: 9%
- 20: 3%
- 40: 1%
- 60: 0.7%
- 80: 0.5%
pion shower starts later and spreads out more than electron’s.