ES-EE slopes obtained from SimHits

Fitting by other method: cut the histrogram per 20 MIP and use gaussian fit. Fitting range is from (the location of peak value -1) to 1.5 RMS

then fit the value of each bin's mean value by straight line fit to get slope.

for example:

one bin fitting:

Then we get slope by getting each bin's mean valuse:

Results:

• Electron Pt = 10

• Electron Pt = 30

• Electron Pt = 50

• Electron Pt = 100

• Electron Pt = 150

• Slope of Different Eta and Pt

• Offset of Different Eta and Pt

• Effect of fitting range

Fitting Range 0~2100                                      Fitting Range 0~1800

Fitting Range 0~1500                                      Fitting Range 0~1200

Pt=100 Eta=2.0
Fitting Range: 0~2520 & Entries of each bin

Fitting Range 0~2200                                      Fitting Range 0~1900

Fitting Range 0~1600                                      Fitting Range 0~1300

Pt=100 Eta=2.3
Fitting Range: 0~2680 & Entries of each bin

Fitting Range 0~2400                                      Fitting Range 0~2100

Fitting Range 0~1800                                      Fitting Range 0~1500

Conclustion: Effect of fitting range on slope is fine.

• Energy Resolution

• Energy Resolution of Different Operation Modes

Only use 2nd ES plane to recover the energy

• Energy resolution of only 2nd plane (only add 2nd plane's energy back)

• Energy resolution of RecHits by Clustering

• Reconstructed energy spectrum using clustering